It is reported that China's coal industry will build about 300 million tons of new coal mines during the Eleventh Five-Year Plan period, and will adjust the industrial structure, vigorously integrate and transform existing coal mines, close small coal mines, eliminate backward production capacity, and accelerate the construction of large coal bases and modern large coal mines, which provides a good opportunity for the development of mining machinery enterprises in China.

First, the important role of coal in China's energy structure.

Coal is China's main energy source and an indispensable material basis for national economic and social development. China is rich in coal resources, and the distribution area of coal resources is about 600,000 square kilometers, accounting for 6% of the national territory. According to the third national coal resources forecast and evaluation, China's total coal resources are 55.7 trillion tons, with great potential, ranking first in the world. Only 25% of the resources were identified, and only 17% was identified. The proven reserves reach1020.2 billion tons. Among them, the recoverable reserves are1891100,000 tons, accounting for 18%, and the per capita possession is only 145 tons, which is lower than the world average. The State Council's Medium-and Long-Term Energy Development Plan (2004-2020) (draft) points out that "we should vigorously adjust and optimize the energy structure, adhere to the strategy of comprehensively developing oil, natural gas and new energy with coal as the main body and electricity as the center". In view of the characteristics of "more coal, less oil and less gas (natural gas)" in China, coal will still dominate the energy structure for a long time to come, accounting for about 70% of primary energy consumption. In 2004, coal accounted for more than 70% of China's primary energy output and played an important role in China's energy structure.

According to the demand of building a well-off society in an all-round way in China, the trend of coal consumption will increase obviously. In the composition of coal consumers, the coal consumption of four industries, electric power, metallurgy, building materials and chemical industry, increased from 50% in 1990 to 84% in 2004, of which electric power accounted for 5 1.8% and metallurgy1.64% in 2004.

Second, the development status of China's coal industry

2 1 century, China's coal industry developed rapidly. The national coal output was 990 million tons in 2000,1.1.400 million tons in 2006, 1.38 million tons in 2002 and 1.667 million tons in 2003. In 2004, China produced 654.38+956 million tons of coal, accounting for 74.3% of the total disposable energy production. In that year, the coal sales volume was 654.38+0.89 1 100 million tons, accounting for 65% of the total disposable energy consumption. The level of productive forces has been significantly improved, and significant progress has been made in industrial restructuring. Some enterprises began to carry out cross-regional and cross-industry industrial alliances, and the industrial chains of coal, electric power, chemicals, railways, ports and aviation began to take shape, forming a number of domestic leading and internationally competitive large groups such as Shenhua Group, Shanxi Coking Coal Group and Yankuang Group. China's coal production has risen sharply, attracting worldwide attention.

Coal is the cornerstone of China's energy security. Coal industry is an important basic industry in China. China ranks first in the world in coal production and is a big coal producer. Now China's coal industry has the ability to design, construct, equip and manage10 million tons of open-pit coal mines and large and medium-sized mines. Modern fully mechanized mining equipment, fully mechanized excavation equipment and large-scale efficient open-pit mining, mining, transportation and supporting complete sets of equipment have been widely used in large and medium-sized coal mines. At the same time, the overall level of coal mining technology and equipment in China is low, and coal production technology and equipment is a multi-level structure of mechanization, local mechanization and manual operation. Low level of technical equipment. 60% of coal mines in China are not mechanized. The equipment level of large and medium-sized state-owned key coal mines is advanced, but the equipment is aging; The level of production technology and equipment in small coal mines is extremely low, with backward production technology, too many workers and low efficiency. Ensuring coal supply is one of the key points for the state to strengthen macro-control of the coal industry. This is an important measure to tap the potential of coal production and accelerate the construction of large coal bases. Therefore, only by greatly increasing the output of large and medium-sized coal mines can we curb development, eliminate small coal mines and complete the optimization and adjustment of coal production structure on the premise of ensuring a stable supply of coal. 1since February 1998, the state has made major adjustments to the coal industrial structure, closed more than 50,000 small coal mines and eliminated a number of backward production capacity. Through macro-control, the coal production situation has improved, and the relationship between supply and demand tends to be balanced. At present, there are more than 25,000 coal production enterprises in China, of which enterprises above designated size account for about 60%. In 2005, it is planned to close more than 2,000 small coal mines.

Three, China's coal industry problems and the gap with the international advanced coal producing countries

1, China's coal enterprises are small in scale and low in industrial concentration. The prominent characteristics of China's coal enterprises are small scale, low efficiency, poor safety and low industrial concentration. According to the statistical data analysis of coal industry, in 2002, state-owned key coal mines accounted for 52%, state-owned local coal mines accounted for 18%, and township coal mines accounted for 30%. According to well types, large mines account for 32%, medium mines account for 18%, and small mines (including township mines) account for 48%. In 2004, there were about 25,000 coal mines in China, of which more than 95% were small coal mines. The annual production capacity of mines is less than 30,000 tons, accounting for about 40%, and the concentration of coal industry is only 15%, which is far below the level of major coal producing countries in the world. The coal industry in the international advanced coal-producing countries is centralized, and the world's top 10 companies rely on their core competitiveness to become stronger and bigger, which improves the global coal industry concentration. In 2003, the coal output of 10 coal companies accounted for about 18.8 1% of the global output, and the coal output of five companies exceeded10 million tons, among which Peabody, which ranked first, reached1830,000 tons, and Rio Tinto reached/kloc.

2. China's coal equipment is backward, mechanization and automation are low, and there is a lack of large complete sets of equipment. The production base of coal mines in China is weak, and nearly 50% of state-owned coal mines are in a state of continuous production. The main production equipment in the mine is seriously aging, accounting for 30-40% of the overdue service. Some township coal mines are poorly equipped with poor production conditions, and some have no mechanical equipment at all, only manual mining, which does not meet the requirements of relevant coal laws and regulations. At present, China's resources have been seriously damaged and wasted. Some coal enterprises waste resources such as "selecting coarse and discarding fine" and "eating fat and losing thin". The average resource recovery rate of coal mines in China is about 30-35%, while that of small mines in resource-rich areas is only 10- 15%. According to the analysis of statistical data of coal industry, in 2002, the mechanization degree of coal mining in China's state-owned key coal mines was 77.78%, the mechanization degree of comprehensive coal mining was 62.98%, the mechanization degree of tunneling was 8 1. 15%, the mechanization degree of comprehensive well digging was 15.03%, and the mechanization degree of local state-owned coal mines was even lower. At present, the mechanization degree of coal mining in China is only 42%. Except for 75% state-owned large and medium-sized coal mines, most coal mines have low production technology, poor equipment and low efficiency. Township coal mines, in particular, are basically non-mechanized mining. In 2004, the output of township coal mines accounted for 39% of the total coal output in China. For coal seams over 5.5 meters which are not suitable for caving mining, it is the most reasonable and effective mining method to adopt full height mining at one time, but there is no suitable fully mechanized mining equipment with high yield and high efficiency in China at present. While foreign companies such as JOY, Desbetes (DBT) and Eickhoff (Eickhoff) all have mature complete sets of fully mechanized mining equipment with high yield and high efficiency. The annual output of complete sets of equipment imported by Shenhua Group has exceeded 6.5438+0085 million tons, the length of working face has exceeded 300 meters, the longest working face has exceeded 400 meters, and the total installed power of working face has exceeded 5000kw. In international advanced coal producing countries, coal production is characterized by high power, heavy duty, automation, intensification and environmental protection. Advanced foreign coal mining equipment is developing towards high power and heavy duty, with large equipment reserve coefficient and high operation reliability. Mining equipment companies such as DBT (German Desbetes), Jiuyi (American Jiuyi) and Eickhoff (German Eickhoff) all produce products with automation function. The second coal mine in the United States realized the random automatic moving of the working face. Platthana Coal Mine has realized automatic coal cutting and random automatic frame moving. In particular, information technology has been widely used in coal mine production. Advanced coal mines widely collect working face equipment operation parameters and environmental safety detection information, display them centrally in the working face, and transmit them to the ground computer through Ethernet to realize remote transmission and fault diagnosis. The transportation system, power supply system and ventilation system are all unattended. Centralized remote operation and video monitoring should be implemented, and special personnel should be assisted to patrol. Mine roadway layout is dense, production systems and links are few, showing a high degree of concentration of production. Usually one mine, one well and one by-product. Some advanced longwall faces only need 6 people per shift, including 2 shearer drivers, maintenance workers 1 person, head centralized operators 1 person, and 2 people for rest. Attach great importance to the improvement of working environment and personal safety protection. Computer monitoring of safety information is realized, and monitoring probes are distributed all over the mine. The hydraulic support has the functions of automatic spraying by machine and automatic spraying by moving frame; The wind deflector is installed above the shearer to reduce coal dust from entering the pedestrian space. There is almost no one on the downwind side of the shearer.

3. Coal Mine Safety Accidents In China's coal mine safety production, major gas accidents occur frequently, and the total number of deaths in coal mine accidents has reached a peak. In 2004, China produced about 2 billion tons of coal, and about 6,000 people died in accidents. In recent years, coal production has increased substantially, and the death rate of one million tons in coal mines has decreased. From 5.59 in 1994 to 3.08 in 2004, the United States produced about1000 million tons of coal, and the death rate was 27-3 1 person, and the death rate per million tons was about 0.039; The death rate per million tons in Poland is 0.09; The death rate per million tons in South Africa is 0.13; The death rate per million tons in Russia is 0.34. China's death rate per million tons is about 100 times that of the United States, 10 times that of Russia and 12 times that of India, which greatly exceeds that of advanced coal-producing countries. According to experts, mine safety testing instruments and safety equipment are all considered in the design, most accidents are mine management problems, and accidents caused by equipment problems are few. Advanced coal-producing countries rely on large-scale and powerful fully mechanized mining technology and equipment to complete the transformation from ordinary fully mechanized mining to efficient intensive and automatic production in mines. The construction of high-yield and high-efficiency coal mines not only improves the coal production efficiency, realizes the intensive production of coal mines, but also creates conditions for the safety monitoring in the coal mine production process, thus effectively preventing and controlling the coal mine safety production accidents. Advanced coal-producing countries attach great importance to safety production, which not only has a sound system of laws and regulations on safety production, but also has strict safety production measures and strict coal mine production access system. Moreover, the computer monitoring of safety information is realized, and monitoring probes are spread all over the mine to ensure safe production.

Four, the development of coal industry demand for mining machinery and equipment

1, development trend of China's coal industry

According to the development plan of coal industry, during the Eleventh Five-Year Plan period, China will build about 300 million tons of new coal mines, of which 200 million tons will be put into production. During the Eleventh Five-Year Plan period, the state will adjust the industrial structure of the coal industry, vigorously integrate, transform and close small coal mines, and at the same time moderately accelerate the construction of large coal bases and start a number of modern large coal mines to replace backward production capacity. During the Eleventh Five-Year Plan period, the modern enterprise system in the coal industry will be further improved, and large coal enterprise groups will basically take shape. By 20 10, 500-600 million tons of super-large enterprise groups and 500-600 million tons of large enterprises will be formed, accounting for about 60% of the country's total coal output. Through the technical transformation of new and old mines, 300 high-yield and high-efficiency mines have been built in China, and the output of high-yield and high-efficiency mines accounts for about 50% of the total national output. During the Eleventh Five-Year Plan period, the state will build 13 large coal bases in Shendong, Jinbei, Jin Dong, Mengdong (Northeast), Yunnan-Guizhou, western Henan, Jinzhong, Huaibei, Huanglong (Huating), Zhong Yi, Ningdong and northern Shaanxi. The storage capacity of these bases accounts for more than 70% of the national reserves and is used as coal. It is preliminarily predicted that the national coal demand will be 2.5-2.7 billion tons in 20 10 and 3-3.2 billion tons in 2020, both accounting for 60% of the energy demand. According to relevant statistics, the raw coal output of state-owned key coal mines in 2004 was 922 million tons, exceeding its approved production capacity by more than 50%, and the coal production capacity was seriously insufficient. It is estimated that by 2020, the production capacity of newly built and existing coal mines in Jianguo will be about 765,438+1100 million tons. If the output of small coal mines in China is maintained at the current level of 600 million tons by then, according to the high-end plan of demand forecast, China needs to increase the coal mine production capacity by 654.38+07 billion tons in the next 20 years, with an average annual output of 85 million tons; According to the low-end scheme of demand forecasting, China needs to increase coal mine production capacity by 65.438+300 million tons in the next 20 years, with an average annual output of 65 million tons. 2. Demand for mining machinery and equipment

During the "Eleventh Five-Year Plan" period, the production technology level of coal industry will be significantly improved. The state will build 140 efficient, safe and modern mines, and the state will increase its support for coal mine construction projects. There have been 17 coal construction projects successively, and the National Development Bank has issued a loan commitment, and more than 100 high-grade conventional mining faces have been upgraded to fully mechanized mining faces, and more than 100 conventional mining faces have been upgraded to high-grade conventional mining faces. In this way, the mechanization degree of large-scale coal mining in China will reach 95%. The mechanization degree of medium-sized coal mines will reach more than 80%; The domestic advanced equipment rate of large coal mines is 20%, the international advanced equipment rate is 6%, the domestic advanced equipment rate of medium coal mines is 10%, and the mechanization and semi-mechanization degree of small coal mines is over 30%. According to this analysis, with the rapid growth of coal demand, the above indicators of coal mining mechanization will be broken, which provides a broad market prospect for the development of coal mine equipment.

(1) key equipment of fully mechanized coal mining

In China, more than 90% of coal and carbon are mined by underground workers, and underground mining plays a leading role in coal mining. In order to rapidly improve China's comprehensive equipment level, we should take Scientific Outlook on Development as the guide and adopt a leap-forward development model. During the "Eleventh Five-Year Plan" period, it is necessary to take the localization of fully mechanized mining equipment with a daily output of 250,000-30,000 tons (about/kloc-0,000 tons per year) as a breakthrough to realize the localization of fully mechanized mining equipment nationwide and promote the development of China's mining machinery industry.

It is estimated that from 2004 to 2020, 30 sets of fully mechanized mining faces and 50 sets of conventional mining faces will be added every year, and the annual equipment renewal is about one sixth of the existing base. It is roughly estimated that the annual demand for complete sets of coal mine equipment will reach about 500 units in 20 10. The core of high-yield and high-efficiency fully mechanized mining technology is the comprehensive mechanized coal mining and transportation equipment in underground working face, which mainly includes shearer, scraper conveyor, hydraulic support and belt conveyor. The electric haulage shearer, which is in urgent need of development and research, has a total installed power of about 2000kw, a power supply voltage of 3.3 KV, a mining height range of 5-6m and a production capacity of about 3000 t/h. ..

Heavy scraper conveyor: the conveying capacity is 3000- 5000t/h, the laying length is 250-400m, the chain speed is 1.4m/s, the installed power is 3×700 or 2× 1000kw, and the power supply voltage is 3.3KV.

Hydraulic support: the maximum working resistance is 12000 KN, the maximum cylinder diameter of the column is Ф 480mm, the support height is 6m, the support spacing is 1.75-2m, the support lifting time is 8- 12 s, and the electro-hydraulic control system is adopted.

Large belt conveyor: installed power 1500-4000KN, voltage 3.3KV, bandwidth ≥ 1.4m, belt speed ≥5m/s, conveying capacity ≥5000t/h, conveying distance over 50000m, service life of idler over 50000 hours and service life of reducer over 70000 hours.

(2) Underground comprehensive excavation equipment

At present, the mechanization degree of comprehensive excavation in China is low, only 12.5438+0%, which is far behind the development of comprehensive excavation. Although the roadheader has made great progress, the overall technical level still lags far behind the international advanced level.

It is necessary to develop advanced roadheader: its cutting power is above 300kw, cutting surface reaches 42m2, and economic cutting hardness reaches f 12, which requires reliability. The service life of gears is more than 20,000 hours, and the service life of bearings is more than 30,000 hours, so as to strive for trouble-free running of the whole machine at 10000 meters. ..

At the same time, combined with China's national conditions and the reality of coal mine industry and mining, a combined equipment unit for digging and anchoring, which integrates cutting, loading, walking, bolt support, airborne and dust removal, can greatly improve the tunneling speed.

(3) Fully automatic media planning equipment

The reserves of thin coal seams in China account for about 2 1% of the total reserves. However, due to thin coal seam, small working space and poor working conditions, high-yield and high-efficiency mining technology in thin coal seam has always been an important problem in China's coal industry. As a kind of "shallow buried multi-circulation" coal mining equipment, plough is an effective way to realize high yield and high efficiency in thin coal seam. Improving the mechanization level of thin coal seam and speeding up the mining progress of thin coal seam resources can not only make full use of limited resources and improve the overall production capacity of the mine, but also help to ensure the safe production of the coal mine. It is imperative to develop a complete set of automatic coal planing equipment with powerful function, high strength, high efficiency and compact structure. Fully automatic coal plough equipment (mining height is 0.6- 1.8m), mainly including coal plough, supporting scraper conveyor, hydraulic support for thin coal seam, gateway loader, crusher and other products. At present, China mainly imports the main engine-plough and supporting scraper conveyor from Germany DBT, the hydraulic support for thin coal seam is supported by Beijing Coal Machine Factory, and the loader and crusher are supported by Zhangjiakou Coal Machine Company. Up to now, six sets (2 sets of Tiefa, Jincheng, Xishan, Yangquan, Datong 1 set) have been imported. Developed automatic coal planing equipment: production capacity1000t/h, laying length of 250-300m, coal seam thickness of 0.8-2m, coal hardness F≤3.5, coal seam dip angle ≤25 degrees, power of 2×400kw (planing head part), coal planing mode of two-speed mixed type, and upward speed of 0.88. Excavation depth ≤ 1.20 mm, 90 mm upward, 30 mm downward, 38 mm traction chain, Grade D.. The plow adopts intelligent control system, which can automatically monitor the nature and location of faults.

(4) Mine hoisting equipment

At present, about 90% of raw coal in China is mined by underground workers, and mine lifting equipment is the throat equipment of underground mining, which not only relates to the coal output of the mine, but also directly affects the safety of people and the whole mine. By 2020, the coal output in China will reach 2-3.2 billion tons, and it is estimated that about 30 large and extra-large mine hoists will be added every year. Considering the transformation and comprehensive estimation, during the 11th Five-Year Plan period, an average of all kinds of hoists 150- 180 will be needed every year, of which large and extra-large hoists account for about 20%, small and medium-sized hoists account for about 80%, and the annual output value of hoists will increase by 5. Developed a super-large mine hoisting equipment with an annual output of100000 tons. Its specifications are 6×4 and 7×4 multi-rope hoists, the maximum traction power of a single machine is 6000KW, the maximum traction power of two machines is 2×4000KW, the maximum lifting speed is 14× 16 m/s, and the service life of the whole machine is 25 years.

Adopt constant torque and constant deceleration hydraulic control system: adopt computer digital control to run automatically, and the monitoring of lifting speed and container position is all automatically detected, fed back and adjusted by electric power. Realize the full-automatic monitoring operation of the hoist.

(5) Complete sets of equipment for open-pit mining

Open-pit mining accounts for about 10% of China's total coal mining. Compared with underground mining, open-pit mining has the advantages of high utilization rate of coal resources, low mining cost and safer working site and personnel. Therefore, the development of open-pit mining is more important and significant than underground mining. The design, manufacture and use of large-scale open-pit mine equipment are highly technical, and countries all over the world are scrambling to apply the most advanced technical achievements to large-scale open-pit mine equipment. Therefore, the development of large-scale open-pit mine equipment can promote the development of machinery, electric power, hydraulic pressure, information and other industries and promote the development of China's national industry. At present, the characteristics of open-pit mining in the world are: highly centralized mining and intensive management; Diversification of mining technology; Computerization of enterprise management and intelligent mines: rational utilization of resources, reconstruction of ecological environment and sustainable development. In the master plan for the construction of large-scale coal bases in China, large-scale open-pit coal mines have been built in Shendong, Jinbei, Mengdong (Northeast), Yunnan-Guizhou, Huanglong (Huating), Shaanxi and other bases, and the demand for mining excavators in the 20 million t mining and dressing project market of Huolinhe, Yimin, Shengli and Pingshuo alone can reach 3-5 billion. Harwu, Wujiata, Majiata and other mining projects need1.50-200 million yuan of large shovels. For example, Mengdong alone needs to build seven coal bases with 50 million tons of semi-continuous mining technology and equipment, and a number of large-scale open-pit coal mines with tonnage exceeding 1 000 tons, such as 123, Bai Yinhua, Yimin River, Baorixile12, plus Shenfu, Harwusu and the original five open-pit coal mines. The demand for mobile and semi-mobile crushing stations is between 40 and 60, and the production capacity of mobile (semi-mobile) crushing stations is required to reach 2000-4000 tons (broken coal) per hour, with a maximum of 6000 tons (broken rock) per hour. According to the demand for mining trucks in the above coal mine construction, it is estimated that there will be about 250 100t mining trucks during the 11th Five-Year Plan period. At present, it is necessary to develop large mechanical buckets with bucket capacity of 28m3 and 45m3, and large excavators with bucket capacity of 70m3, 90m3, 100m3 and arm length of about 100m, which can reduce power consumption 17%, reduce stress load of mechanical parts by about 30%, prolong service life of parts and make the mean time between failures reach the international advanced level. Develop bucket wheel excavators, and strive to cooperate with foreign countries to manufacture 3600m3 large bucket wheel excavators, reaching the international advanced level. Develop mobile and semi-mobile large crushing stations with a production capacity of 4000-6000-8000t/h, crushing material strength ≤ 150Mpa, and feeding granularity1500×1500×1500-2500×. A large belt conveyor with a bandwidth of 2m has been developed, with a power of 3× 1400KW and a transport capacity of12,000t/h, with a semi-fixed stand-alone machine length of 8820m and a displacement stand-alone machine length of 5270m, which can operate normally at a low temperature of -45℃. Strive to cooperate with foreign countries to develop large electric wheel dump trucks with a load of 170-360t, reaching the advanced level of similar products in the world.

(6) Coal washing and processing equipment Clean coal washing and processing technology is the basis of comprehensive utilization of resources, an effective way to improve the thermal efficiency of coal, and also the need to ensure the sustainable development of national economy and environmental protection. Driven by policy support, scientific and technological progress, market pull, investment increase and environmental protection requirements, the coal washing and processing industry has shown a gratifying situation of rapid development, overall promotion, capacity expansion and quality improvement, efficiency improvement and pollution reduction, and the proportion of raw coal washing and processing has been increasing. By the end of 2004, there were more than 2,000 coal preparation plants with an annual washing capacity of 30,000 tons and above, with a design capacity of over 750 million tons and a raw coal washing capacity of about 500 million tons. In 2005, the washing capacity of raw coal in China will suddenly exceed 800 million tons, the washing capacity will reach 600 million tons, and the washing ratio will reach 40%. According to the coal industry planning, by 20 10, the washing rate of raw coal will reach 50%, the washing capacity of raw coal will increase to11000000 tons, all coking coal will be washed, and the washing rate of power coal will reach over 40%. According to this calculation, 80-1100,000 tons of raw coal will be added to the washing every year. According to the calculation of 4 million tons of coal washing plants, 25 large-scale coal washing plants will be added every year to carry out technical transformation of existing coal washing plants, and about 250 sets of coal washing equipment will be needed every year. Coal washing equipment has great development potential. In order to meet the requirements of coal washing and processing, a new flotation machine with a single processing capacity of 1000-2000m3/h should be developed, and its main parameters can be automatically controlled. A large linear vibrating screen with high reliability and screen surface ≥28m3 was developed. An efficient hydraulic moving screen cleaner with feeding granularity of 25-400mm and processing capacity of 300-400 t/h was developed, and high-efficiency dewatering equipment such as large horizontal vibrating centrifugal dehydrator with screen basket diameter ≥ 1.4m and processing capacity ≥300T/h, 400m2 high-efficiency clean coal filter press and settling centrifugal dehydrator with processing capacity ≥35T/h were developed. Develop centralized control and intelligent management technologies and equipment for large-scale coal preparation plants with the scale of 3-4 million tons/year, and realize online detection of main process parameters in the whole process of coal preparation, such as ash content, moisture content, calorific value, suspended density, feed concentration, flow rate, cyclone inlet pressure, jig bed thickness, looseness, flotation dosage, overflow water turbidity of rake thickener, coal flow rate of belt conveyor, etc.

In addition, with the vigorous development and popularization of clean coal technology in the coal industry, secondary conversion equipment such as coking, liquefaction and gasification of coal will also develop rapidly. It is imperative to develop large coking equipment, large coal liquefaction vessels and large coal gasifier.

Therefore, mining machinery enterprises should seize the opportunity of China's current industrial restructuring and enterprise deepening reform, and under the guidance of national policies, accelerate the pace of reorganization, union, merger, bankruptcy, reorganization and joint-stock reform of mining machinery enterprises, and set up large-scale mining engineering equipment groups with mining machinery manufacturing enterprises as the main body, coal production enterprises as shareholders and scientific research institutes as participants, such as China Coal Mine Engineering Equipment Group and Taiyuan Heavy Machinery Group Coal Machinery Co., Ltd., thus forming large-scale mines with manufacturing and development capabilities and complete engineering capabilities. Build the enterprise into a modern mining engineering enterprise group with market competitiveness and anti-risk ability, strive to provide complete sets of equipment for coal mines, reduce user risks, and make positive contributions to the development of China's coal industry.