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Prevention treatment method for fully mechanized coal mining face

A technology of fully mechanized mining face and treatment method, which is applied in the field of prevention and treatment of fully mechanized mining face, can solve the problems of not being able to avoid the hidden danger of roof fall and spontaneous combustion well, and achieve the effects of improving safety and improving the speed of advancement.

Pending Publication Date: 2022-06-03
CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Based on this, it is necessary to provide a preventive treatment method for the fully mechanized mining face in view of the technical problems that the existing technical problems cannot well avoid the hidden dangers of roof fall and spontaneous combustion when mining to the syncline axis.

Method used

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  • Prevention treatment method for fully mechanized coal mining face
  • Prevention treatment method for fully mechanized coal mining face
  • Prevention treatment method for fully mechanized coal mining face

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] like figure 1 Shown is a working flow chart of a method for preventing and treating fully mechanized mining face of the present invention, including:

[0045] Step S101, when the working face is recovered to the syncline axis and climbs the slope, pre-grouting holes are made at preset distances in the lower side of the return air lane and the upper side of the transport lane, and polymer is injected into the pre-grouting holes that have been constructed. Material;

[0046] Step S102, arranging multiple groups of grouting points within the overall range of the working face inclination, recording the thickness of the top coal remaining in the mining process of the working face, and for the area where the thickness of the remaining top coal exceeds a preset thickness threshold, grouting from the corresponding area of ​​the area Point grouting to the gob position corresponding to the area until the area is filled;

[0047] Step S103, when the working face has a roof cavin...

Embodiment 2

[0053] like figure 2 Shown is a working flow chart of a method for preventing and treating fully mechanized mining face in an embodiment of the present invention, including:

[0054] Step S201, when the working face is recovered to the syncline shaft and climbs the slope, within the range of the preset distance ahead of the working face, pre-grouting holes are made at preset distances for the lower side of the return air lane and the upper side of the transport lane. The pre-grouting hole is at a preset angle with the horizontal direction, and the pre-grouting hole after construction is filled with polymer material.

[0055] Step S202, within the overall range of the inclination of the working face, starting from the first bracket, arranging a group of grouting points at every preset number of brackets until the last bracket on the working face, each group of grouting points starting from the bracket A grouting pipeline is arranged to the goaf, one end of the grouting pipeli...

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Abstract

The invention discloses a fully mechanized coal mining face prevention and treatment method which comprises the following steps: when a working face is stoped to climb towards an oblique shaft part, pre-grouting holes are drilled in a lower side of a return airway and an upper side of a transportation roadway at preset intervals, and high polymer materials are injected into the pre-grouting holes; a plurality of groups of grouting points are arranged in the overall inclination range of the working face, and grouting is performed from the grouting points corresponding to the area to the goaf position corresponding to the area for the area with the top coal remaining thickness exceeding the preset thickness threshold value till filling of the area is completed; when roof caving occurs in the climbing process of the working face, a grout stopping wall is built to seal a cavity formed by roof caving, a roof caving filling grouting hole is reserved, a macromolecule filling body is injected into the roof caving filling grouting hole for filling, and after the macromolecule filling body in the cavity is solidified, a coal mining machine passes through a roof caving area. According to the method, the hidden danger of spontaneous combustion caused by coal remaining in the goaf in the inclined climbing process of the fully mechanized coal mining face is eliminated. And the safety of the working face in the advancing process is improved.

Description

technical field [0001] The invention relates to the relevant technical field of coal mines, in particular to a preventive treatment method for fully mechanized mining face. Background technique [0002] The fully mechanized mining face sometimes encounters geological structures during the mining process, and the syncline is one of them. The roof in the range of influence of the syncline is relatively broken, especially the roof at the range of the axis of the syncline is more broken, which can easily lead to the roof of the working face. In addition, the top coal is easily left in the working face during the process of climbing through the syncline shaft, which leads to spontaneous combustion in the later gob. These two factors bring great difficulties to the fully mechanized mining face when it passes the syncline shaft. [0003] The current commonly adopted practice is to wipe the top moving frame with pressure in time when the working face passes through the syncline sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00
CPCE21F15/005
Inventor 吕兆海黄海鹏孙昊李立波孔军峰李小龙黄辉张森沈铭华孟兴国刘大鹏刘尚陈小磊王浩王伦姚帅马涛孙海鹏张舜杨秋龙白立军马赛姚荣
Owner CHINA ENERGY GRP NINGXIA COAL IND CO LTD
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