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Long-wall working face coal pillar-free mining method

A mining method and working face technology, which is applied in ground mining, earthwork drilling, underground mining, etc., can solve the problem of uncoordinated roadside support and surrounding rock deformation, less application of active support technology, and lack of systematic support design, etc. problems, to achieve the effect of high mining rate and improved operating efficiency

Active Publication Date: 2012-07-04
何满潮
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Problems solved by technology

Although some achievements have been made, there are still many deficiencies and problems: ignoring the support function of the roadside coal body, less application of active support technology in the roadway, uncoordinated roadside support and surrounding rock deformation, and lack of systematic support design

Method used

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  • Long-wall working face coal pillar-free mining method
  • Long-wall working face coal pillar-free mining method
  • Long-wall working face coal pillar-free mining method

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Embodiment Construction

[0028] Typical embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention is capable of various changes in different embodiments without departing from the scope of the present invention, and that the description and drawings therein are illustrative in nature and not limiting. this invention.

[0029] The coal pillar-free mining method adopted in the present invention firstly needs to form the first mining face. like figure 1 and figure 2 As shown, the method of forming the first mining face 1 is the same as the existing method. The first mining position is established on the edge of the coal seam mining. At this position, two parallel roadways 2, 3 and two The parallel roadways 2 and 3 are connected through the roadway 4 at the tail. The roadway 2 near the edge is the up-going roadway, the roadway 3 close to the continuing mining face is the down-...

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Abstract

The invention discloses a long-wall working face coal pillar-free mining method which comprises the following steps of: (1) digging an upper gate road tunnel and a lower gate road tunnel; (2) reinforcing a roof plate of the lower gate road tunnel, and drilling an energy collecting hole for presplitting blasting on the roof plate; (3) recovering till that a gob is formed; (4) blasting in response to the energy collecting hole, so that a kerf is formed at the roof plate; (5) breaking and sinking a mining face, so that a new tunnel is formed; (6) taking the original lower gate road tunnel as the upper gate road tunnel of the next mining face, and digging a lower gate road tunnel opposite to the upper gate road tunnel, so that a new mining face is formed; and (7) repeating the steps (2)-(6), and continuously mining coal till that the coal bed is completely mined. Every two mining faces in the method are continuous, and can not be supported by coal pillars, so that the method is high in mining efficiency, free of long-time waiting when the tunnel is formed, and high in working efficiency.

Description

technical field [0001] The invention relates to a coal seam mining method, in particular to the coal seam mining method of a longwall working face. Background technique [0002] With the increase of coal mining depth, longwall mining usually adopts the method of leaving coal pillars to protect the upper channel roadway. When the roadway is deep, the width of the coal pillars increases due to the sharp increase of ground stress. Traditional longwall mining work In the face-along gob (excavation) roadway mining process, there are large roadways in the deep mining process, high excavation ratio, low production efficiency, serious waste of resources, gas outbursts caused by coal pillars, frequent rock bursts, Potential safety hazards such as air leakage in gobs have become major issues that plague and affect the safety and efficient mining of coal mines. [0003] At present, the research on coal pillarless mining in major coal mining countries at home and abroad mainly focuses ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16
Inventor 何满潮张国锋孙晓明刘万波汤晓东俞学平魏正均杨晓杰
Owner 何满潮
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