In order to improve the standardization level of mechanical and electrical safety and quality in our mine, make every mechanical and electrical employee familiar with the standardization standard of mechanical and electrical safety and quality, be able to work in a standard manner, ensure that the mechanical and electrical equipment platform is in good condition, operate safely without accidents, and ensure the strong safety production in our mine, a comprehensive training for mechanical and electrical employees in our mine is specially organized in combination with the current actual situation in our mine. The specific scheme is as follows:
1. Training content: basic knowledge of electrician, standardization standard of electromechanical safety and quality of Jinmei Group, 60 explosion-proof articles of Jinmei Group, and electromechanical management system of Yuecheng Mine.
Second, training methods: training teachers: Wang Zhongqing, Wang Gang, Liu Qingmin, Qin Yuqin and Wei Huibin.
Su Guo Changqing Wang Liuyong Xue Ke
Third, the training time:
March 3rd and April 3rd (explosion-proof inspector) Instructor: Qin Yuqin.
March 6th and April 6th (explosion-proof inspector) Instructor: Li Yonggang.
March 10, April 10 (underground monitor) Instructor: Liu Qingmin.
March 13, April 13 (underground monitor) Instructor: Wei Huibin.
March 15 (post operation standard) Instructor: Guo
March 17, April 7 (monitoring duty engineer) Instructor: Wei Huibin.
March 2 1, April 8 (monitoring the personnel on duty) Teacher: Su Changqing.
March 25th (post operation standard) Instructor: Wang
April 1 1, April 15 (safety production regulations) Instructor: Wang Gang.
April 18 (Review) Instructor: Wang Zhongqing.
Verb (abbreviation of verb) Training requirements: 1. Trainers should attend the training on time and must not be late or leave early;
2. Trainers must listen carefully and take notes;
3. Training teachers should prepare lessons carefully and give lectures carefully.
If you need a lesson plan, please press the following format:
Classroom teaching plan (teaching plan)
A teacher in the class that teaches the course.
Review the lecture time section
The subject or problem of study.
Mine power supply system and power supply safety in mining area
Teaching objectives and requirements
Make students understand and master the basic knowledge of coal mine power supply system through lectures; Students are required to master the basic knowledge of "three specialties and two locks" and power supply in mining areas.
teaching process
Through lectures.
First, the requirements of coal mining enterprises for power supply
1. Power load is divided into primary load, secondary load and tertiary load.
2. Rated voltage level:
(1) The high voltage shall not exceed10000 V;
(2) the low voltage shall not exceed1140v;
(3) The rated voltage of lighting signal, telephone and hand-held electrical equipment shall not exceed127V; ;
(4) The rated voltage of the remote control circuit shall not exceed 36V.
3. Basic requirements of power load for power supply:
(1) Ensure the reliability of power supply;
(2) ensure the safety of power supply;
(3) Ensure good power supply quality;
(4) Ensure the economy of power supply system.
Second, the mine and mining power supply system
1, mine power supply system
There are mine ground substations, underground central substations, mining substations and distribution points in the working face which are connected with each other in a certain way, which is called mine power supply system.
According to the scope of mine field, buried depth and geological conditions, mine power supply system is divided into deep well and shallow well power supply system. Deep well power supply system should be adopted when the buried depth of coal seam is greater than 150m, and shallow well power supply system should be adopted when it is less than 150m. My mine adopts deep well power supply system.
2. Transformer neutral point operation mode
(1) neutral grounding operation mode
(2) Neutral point ungrounded operation mode
(3) The neutral point is grounded through the arc suppression coil.
(4) Connection modes of low-voltage distribution lines, including radial, trunk and ring.
3, mine power supply system
Substation in mining area is the center of power consumption in mining area. Its power supply is provided by the central substation, and its main task is to change high-voltage electricity into low-voltage electricity, and distribute this voltage to the coal mining face and other electrical equipment in this mining area.
The location of substation in mining area depends on factors such as low-voltage power supply voltage, power supply distance, coal mining method and roadway layout, coal and rock geological conditions and mechanization degree. In general, the substation in the mining area is located in the center of the power load in the mining area to ensure that the terminal voltage of all electrical equipment in the mining area is not less than 95% of the rated voltage of the equipment.
The substation in the mining area requires good ventilation, solid surrounding rock of the cavern, no water spray and convenient maintenance.
Three, "coal mine safety regulations" requirements for mine power supply
1, the mine should have two power lines;
2, underground central substation, main drainage pump room and underground mining drainage pump room power supply lines, shall not be less than two circuits.
3, it is forbidden to underground distribution transformer neutral point grounding directly. It is forbidden to directly supply power to the underground by the transformer or generator directly grounded by the ground neutral point.
4. When there are two or more voltages in the underground low-voltage distribution system at the same time, the rated voltage should be clearly marked on the low-voltage electrical equipment.
5, the mine must be equipped with inoue, underground distribution system diagram, electrical equipment layout and power, telephone, signal and other line plans, and fill in in time.
6, electrical equipment should not exceed the rated operation.
7, explosion-proof electrical equipment into the well before, should check its "product certificate", "explosion-proof certificate", "coal mine product safety signs" and safety performance; Only after passing the inspection can you enter the well.
Four, electricity safety operation system
1, working ticket system
2, high pressure operation work permit system
3, high pressure brake, test operation ticket system
4. Work guardianship system
5, stop sending system
6, underground ten are not allowed to system
7, three noes, four haves, two neat, three complete, three adhere to the system.
Five, mine power supply safety
1, rules and requirements of electromechanical cavern
2, the working face distribution point Settings
3, the harm of electric shock and preventive measures
4, coal mine safety precautions against electric shock
Six, underground electrical equipment in good condition and maintenance quality standards
1, the function, significance and implementation way of integrity standard for underground electrical equipment
2, downhole electrical equipment in good condition standard
3. Precautions for installation and relocation of underground electrical equipment
Seven, stray current
1, the harm of stray current
2, stray current prevention measures
Eight, "three special and two atresia"
The third dedicated substation is powered by a separate transformer, switch and cable line, and is not connected to other loads. The purpose is to improve the power supply reliability of local ventilator and reduce the interference of other factors on ventilator. Gas electric locking refers to a locking device that can automatically stop power supply when the gas detector set in the heading face detects that the gas exceeds the specified concentration, and can only send electricity when the gas drops below the specified limit (methane 1%, carbon dioxide 1.5%); Wind power locking means that only when the ventilator is normally ventilated can the tunneling face be officially powered on. Once the wind stopped, the power supply to the working face was cut off. Personnel evacuated in time.
1, composition and working principle
2, the role and scope of use
3, the correct use and management of "three specialized and two atresia"
Teaching emphases and difficulties
The key point is to introduce the basic knowledge of coal mine power supply system; The difficulty is to learn and apply the power supply management and "three specialties and two locks" in high gas mines in practical work and master them skillfully.
work arrangement
1, what are the grades of standard voltage commonly used underground?
2. What is "three specialties and two atresia"?
3. What are the requirements for wiring in the Integrity Standard of Underground Electrical Equipment?
Teaching postscript