Graded mining method of coal-rock co-mining working face

A coal and rock simultaneous mining and graded mining technology, which is applied in surface mining, earth drilling, underground mining, etc., can solve problems such as low mining efficiency, and achieve the effects of improving mining speed, efficient mining, and good promotion value

Active Publication Date: 2016-04-20
PINGDINGSHAN TIANAN COAL MINING +2
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Problems solved by technology

[0004] The purpose of the present invention is to provide a simple, effective, low-cost mining method that can effectively solve the low mining efficiency of coal and rock mining face

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  • Graded mining method of coal-rock co-mining working face
  • Graded mining method of coal-rock co-mining working face
  • Graded mining method of coal-rock co-mining working face

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Embodiment Construction

[0018] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described below through specific embodiments and accompanying drawings.

[0019] figure 1 It is a schematic diagram of the present invention carrying out the coal-rock co-mining working face graded mining, including a roof 1, a rock formation 2, a coal seam 3, a bottom plate 4, and blasting holes 5, etc., wherein H 1 is the rock thickness, H 2 is the coal seam thickness.

[0020] Coal and rock co-mining working face classification mining method of the present invention, its steps are as follows:

[0021] First of all, the rock formation strength f of the coal and rock simultaneous mining face is tested before mining, and the mining strength of the working face is classified according to the size of the rock formation strength f:

[0022] If f<1.5, the rock formation strength is grade I (f is a dimensionless parame...

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Abstract

The invention relates to a graded mining method of a coal-rock co-mining working face. The rock stratum strength f of different areas is judged in a graded manner, and mining is performed by targeted measures. If f<1.5, the rock stratum strength is grade I; if 1.5< / =f<3.0, the rock stratum strength is grade II; if f> / =3.0, the rock stratum strength is grade III. When the rock stratum strength is grade I, a coal mining machine is directly used to mine the working face, and the coal mining machine uses external-rotation cutting during mining; when the rock stratum strength is grade II, the coal mining machine is directly used to mine the working face, and the coal mining machine uses internal-rotation cutting during mining; when the rock stratum strength is grade III, explosion holes are designed according the rock stratum thickness H1 of the working face before mining, explosion is performed after all the explosion holes are filled with dynamite, and then the coal mining machine is used to mine the working face through internal-rotation cutting. The graded mining method has the advantages that efficient mining of the coal-rock co-mining working face under complex conditions can be achieved, equipment wear is reduced by above 30%, the mining speed of the working face is increased by above 50%, and the method is worthy of popularization.

Description

technical field [0001] The invention relates to a coal-rock co-mining working face classification mining method, which is especially suitable for the protection layer mining of high-gas outburst coal seams under complex geological conditions. Background technique [0002] High gas outburst coal seams have the characteristics of high gas pressure, high geostress, and low permeability. Gas control is very difficult. Various gas disasters are easily induced during the mining process, which seriously threatens the safe and efficient mining of coal enterprises. At present, exploiting protective layers is considered to be a more effective method of gas control. In some mining areas in my country, low-gas coal seams with less risk of outbursts are first mined as protective layers. Using the strong disturbance during the mining process of the protective layer, the adjacent high-gas outburst coal seams (that is, the protected layer) are gradually relieved and enhanced. A large amount...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18
CPCE21C41/18
Inventor 杨建国林柏泉吕有厂杨威肖珷高亚斌魏思祥王满张建华
Owner PINGDINGSHAN TIANAN COAL MINING
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