According to China's coal production policy, coalfield geological characteristics and the development of advanced technology in the world.

This paper discusses the present situation and frontier problems of China coalfield geological exploration from two aspects: improving exploration accuracy and developing dynamic geological research.

Investigation and other aspects to discuss. The development trend of coalfield geological exploration technology is prospected.

Keywords: development trend of geological exploration technology

Introduction to 0

In the 20th century, coal occupied a major position in the world energy. In the 20th century, coal was in the+0th century.

The world's primary energy will still occupy a dominant position, especially in China. In China,1500m.

The total coal resources are about 4 trillion tons, and the proven reserves reach 65.438+0 trillion tons. but

Oil and natural gas, due to the occurrence conditions of resources and the difficulty of exploration and development. It's been a while.

It is difficult for China to increase production significantly. However, with the opening to the outside world and the development of market economy, coal should compete.

Electricity can gain a foothold in the market, and economic, safe and efficient coal mining has become the development of the coal industry.

key Therefore, all coal-producing countries in the world need to continue to carry out coalfield geological exploration.

In addition, coal exploration technology needs to develop rapidly to meet the production demand.

1 Frontier Problems of Geological Exploration in China Coalfield

Judging from the geological characteristics of China coalfield and the development of advanced technology in the world, we can

It can be seen that the frontier problems of coalfield geological exploration in China in recent years can be summarized as the following aspects.

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In some mines, with the increase of mining depth, water inrush accidents often occur, and the water inflow is also increasing. because

The hydrogeological conditions of these coalfields are particularly complex, and the mining depth is increasing. Shallow mines are all treated with water.

Some understandings obtained from this theory are often not applicable to hydrodynamic conditions in deep wells. Therefore, coal mines in China.

The development trend of water disaster prevention technology is: to deeply study the formation and migration of deep karst water in mining areas.

Characteristics of karst water in deep mine floor, water inrush mechanism and development of water inrush prediction technology; exploit

Prevention and control technology of waterless water disaster in mining area adapted to modern mechanized mining.

1.2 common rock coal outburst and gas outburst from the aspects of developing dynamic geological research

Underground disasters such as outburst, rockburst, water inrush and wellbore rupture are actually a dynamic geological phenomenon.

Elephant. These phenomena are all related to the stress field of rock mass. Mainly due to the mining of rock coal, the original

However, the balance between various geological factors is destroyed and the stress of rock mass is redistributed, so

This catastrophic geological phenomenon is triggered or induced. By studying the geology of these phenomena.

Mechanism can predict the dynamic change of rock mass stress with time and space in mining stage in advance.

Check whether the above-mentioned dynamic geological phenomena will form, and determine and take measures to eliminate or weaken these disasters.

Measures.

1.3 from the aspect of strengthening environmental geological exploration and disaster geological prevention, due to the mining area

Under natural conditions, due to development, the geological system is destroyed and may form.

A series of environmental problems, such as cultivated land destruction, water pollution, desertification, dust, carbon monoxide and carbon dioxide.

Air pollution caused by sulfur, and more destructive geological phenomena, such as ground fissures and the ground surface.

Collapse, landslide and even induce earthquakes. Due to historical reasons and the continuous development of coal mines, old accounts have not been settled.

New accounts keep pouring in, and the problem is quite serious. Environmental problems in coal mines restrict the coal industry.

Environmental assessment and management of mining area is one of the key factors of sustainable development and will become the direction of future development.

The important work content of the door.

1.4 From the perspective of improving exploration accuracy, continuous operation is the modernization or mining of coal industry.

The characteristics of mechanization and automation. This requires finding out the subtle changes of coal seam before development, such as

Local minor changes of coal seam thickness, structure and ash content. Rock physical force of coal seam and its roof and floor

Local changes in scientific nature, etc. However, the proven coal reserves in the world and the proven reserves in China.

Reserves mainly mean the in-situ buried amount of coal, which is not sufficient or even full.

Mining geological information that meets the requirements of modern mining technology is widely used to adapt to modern mechanized mining.

Need more exploration.

1.5 from the point of overcoming the difficulties in the development of coalbed methane, in recent years, many countries have been putting coal seams.

Gas is studied as an energy source, and more than 20 countries have carried out research and exploration of coalbed methane.

Exploration and development activities. In the experimental development of coalbed methane, the problems encountered at present are: most wells

Coalbed methane production is low, the attenuation is fast, the drilling fluid pollutes the coal seam, and the hole collapses and plugs after completion, which is hydraulic.

The fracturing effect is not obvious, the fracture is short, the specific gravity is low, and the gas production effect after completion is poor. Obviously,

This paper studies the causes of low permeability of coal seams in China, the law of permeability change, the enrichment and high yield of coalbed methane.

Factors, mechanical stability and failure law of coal seam, develop drilling suitable for low permeability coal seam in China.

Practical technology of CBM well, completion, gas production and stimulation in China and evaluation of favorable blocks.

Price selection mode has become the focus of technical research.

2 development trend of coalfield geological exploration technology

From the development point of view, in recent years, drilling will still be the way to obtain "original" geological data.

Important means. Geophysical prospecting instruments are changing with each passing day, with fast performance upgrading, high sensitivity and high performance.

Resolution, high precision, remote control, computer real-time control, processing, data analysis and three-dimensional drawing.

Development of shape display direction; Geophysical prospecting methods are developing to multi-dimensional, multi-parameter measurement and multi-method combination; count

Computer and information technology will be popularized in every major, every operating unit and even in geological exploration.

Manage the whole exploration system. In recent years, the development trend of coalfield geological exploration technology is worthy of attention

As follows.

2. 1 development of underground exploration technology According to domestic and foreign data, the drop is less than 5m and the length is less than 5m.

Small faults and folds smaller than 150m cannot be identified in recent ground exploration.

Therefore, it is generally believed at home and abroad that exploration or construction in the mining area should be carried out underground before mining in the mining area.

Working face exploration, its methods include mine geophysical exploration and drilling along coal seam. According to the density ratio of upper and lower coal seams

The surrounding rock is small, and the coal seam is an obvious low-speed trough. At the end of 1970s, groove wave was first adopted abroad.

Seismic exploration technology is used to detect underground coal seam structure. In recent years, ground penetrating radar technology has developed rapidly.

Speed. Recently, South Africa has developed a rock radar system, which can quantitatively study rock masses and is very accurate.

Determine the depth of fault zone and the characteristics of fracture zone around roadway. Obviously, underground geophysical prospecting technology in coal mine will be promising.

Doing something is an important development direction.

2.2 the development of horizontal drilling technology since the 1980s, advanced coal mining technology.

The country pays more and more attention to the horizontal drilling method along the coal seam, and adopts it to cooperate with it.

Inclinometer while drilling technology based on. Horizontal drilling technology is developed from controlled directional drilling. In recent years

In recent years, this drilling technology has developed rapidly, not only in the underground along the coal seam, but also in the ground.

Drill holes into the coal seam along a vertical arc and a horizontal trajectory. Horizontal drilling on the ground of coal department

Door was introduced from the petroleum sector in the late 1980s.

2.3 Strengthen comprehensive exploration According to relevant data, although the British coal mining area uses three-dimensional land,

Seismic exploration has explained faults as small as the decrease of coal thickness, but the British deep coal mine company is still heavy.

Study on apparent borehole. In recent years, in the evaluated mine fields with economically recoverable reserves,

According to the grid of 400-500 meters, there is no central hole, and the combined logging method is used for exploration. They developed

A microscopic scanner for rock strata can explain faults and cracks with a drop of several tens of centimeters through human-computer interaction.

Gap, sedimentary and structural characteristics and stress direction. With the help of special software, it can be confirmed by combined logging.

Determine rock type, rock strength, porosity or permeability, dip angle and pore size, and analyze water and hydrocarbons.

Wait a minute. It is said that through this comprehensive exploration method, "a detailed and practical structure and

"Stress field map", thus making mine design feasible, can provide the best construction direction and harmony.

Reasonable selection of mining methods. This shows that it is the best way to choose appropriate means and adopt multi-means comprehensive exploration.

Development direction of deep coal mine exploration.

2.4 Research on dynamic geological exploration technology As mentioned above, this is a dynamic place that endangers mine safety.

Qualitative phenomenon is induced by mining activities. They have dynamic characteristics. Therefore, predictive ability

The formation and intensity of geological phenomena cannot be simply based on the static reflection of original geological conditions.

Check the data, but it should be mainly based on the stress of rock coal seam or the dynamic change of its physical properties with time.

Characteristic data. High-yield and high-efficiency coal mining advances rapidly, and dynamic exploration is implemented, that is, mining while mining.

With the passage of time, it is necessary to continuously explore the stress or physical properties of the mining area.

2.5 To speed up the development of information technology, computers and information technology have been applied in coalfield geological survey.

Exploration, popularization and application of various majors have developed rapidly. Due to the introduction of many high technologies, such as parallel imports.

Distributed processing, mass storage, workstation, multimedia, artificial intelligence and neural network technology.

At present, geological exploration data can be processed, analyzed, interpreted and displayed through man-machine dialogue.

Some geophysical instruments are highly automated and can be pre-processed on site to control various operations and quality.

Quantity, select relevant parameters.

3 Conclusion

According to the analysis of relevant data, except for a few developing countries, major coal producing countries

Since 1980s, the workload of coalfield geological exploration in China has obviously decreased, but it is used for development.

The work content and workload of exploration and working face exploration have obviously increased, and the exploration accuracy has been greatly improved.

Improve. From the requirements of modern coal production, China coalfield geological exploration technology and the world

Compared with advanced technology, there is still a big gap. Therefore, we must seize the opportunity to speed up the coalfields in China.

The development of geological exploration technology can meet the demand of high yield and high efficiency coal mining in China.

References:

[1] Chu Shaoliang. Application of mine geophysical exploration. Beijing: Coal Industry Press.

Li Fuzhong. The road to precise exploration [M]. Beijing: Petroleum Industry Press. 1993.438+046 ~ 153.

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