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Main roof breaking span control method and application thereof

A control method and breaking technology, which is applied in earth drilling, discharge machinery, ground mining, etc., can solve the problem of long initial breaking steps of old roofs, reduce the area of ​​overhanging roofs, broaden application prospects, promote early formation and The effect of development

Pending Publication Date: 2021-07-13
HUATING COAL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a method for controlling the breaking step distance of the old roof, so as to solve the problem that the initial breaking step of the old roof is too long during the initial mining and initial laying of the working face in the coal mining proposed in the above-mentioned background technology

Method used

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  • Main roof breaking span control method and application thereof
  • Main roof breaking span control method and application thereof
  • Main roof breaking span control method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0045] In the embodiment of the present invention, in order to solve the problem that during the initial mining and initial laying of the working face, a large energy impact is induced due to the long initial breaking step distance of the old roof, which threatens the safe production of the working face, a kind of old roof breaking step distance control is proposed. The method is specifically a method for controlling the initial breaking step distance of the old roof of the working face when mining a coal mine, which includes the following steps:

[0046] Step 1, the first blast hole, the second blast hole, the third blast hole, and the fourth blast hole are respectively set on the O-X type fracture plane structure of the rock formation (coal seam) to be broken; wherein, the rock layer to be broken is provided with a transport passage ( That is, the transportation lane, the transportation trough) and the return air channel (ie the return air lane, the return air chute).

[004...

Embodiment 2

[0053] A method for controlling the breaking step distance of the old roof, specifically a method for controlling the first breaking step distance of the old roof of the working face when mining coal mines. The actual operation location is in the 2501 mining area of ​​Huating Coal Mine, and specifically includes the following steps:

[0054] Step 1, the first blast hole, the second blast hole, the third blast hole, and the fourth blast hole are respectively set on the O-X type breaking plane structure of the rock formation (coal seam) to be broken; wherein, the rock layer to be broken is provided with a transport passage and Return air channel.

[0055] Step 2: install explosives in the first blast hole, the second blast hole, the third blast hole and the fourth blast hole respectively, and detonate the explosives to create the center line in the fracture plane structure, thereby forming the fracture plane structure in advance and shortening the initial Breaking step. Among t...

Embodiment 3

[0062] Compared with Embodiment 1, in the embodiment of the present invention, there are mainly three holes in each group of pre-splitting blasting deep holes 18 on the top plate of the cut-out section along the return air flow. Firstly, a hole is arranged in the direction of the vertical roadway on the outer side of the return air trough 10, and the hole is inclined to the side of the triangular coal pillar 9; secondly, a hole is arranged on the top of the roadway vertically to the direction of the roadway, facing the F-shaped structure 17 long arm stress section In the middle; finally, a hole is arranged in the direction of the vertical roadway on the side close to the working face.

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Abstract

The embodiment of the invention relates to the technical field of coal mine disaster prevention and control, and particularly discloses a main roof breaking span control method and application thereof. According to the main roof breaking span control method provided by the embodiment of the invention, a plurality of drill holes are designed based on an O-X type breaking plane structure of a key layer to cut off a relation with a boundary protection coal pillar, so that a main roof is easier to break after a working face is advanced, the O-X type breaking plane structure is promoted to be formed and developed as soon as possible, the suspended roof area is effectively reduced, the primary breaking span of the main roof is shortened, and the problem that the primary breaking span of the main roof is too long mostly in the initial mining and initial releasing period of the working face in coal mining is solved; and the method has wide application prospects.

Description

technical field [0001] The embodiment of the present invention relates to the technical field of coal mine disaster prevention and control, in particular to a method for controlling the breaking step distance of an old roof and its application. Background technique [0002] Safety has always been of paramount importance in coal mining. Affected by many factors such as geological conditions and mining conditions, the later excavation working face (the working face refers to the working place where minerals or rocks are directly mined, which moves with the mining progress) is more violent, and often affects roadways and equipment. Cause damage, and may cause casualties and damage production system accidents. Therefore, it is necessary to carry out coal mine disaster prevention and control work. [0003] At present, through the introduction of monitoring facilities for rock burst, the formulation and improvement of management systems, and the optimization of prevention and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21C37/00
CPCE21C37/00E21C41/18
Inventor 金建成魏东屈英张玉亮苏仁元李军鸿毛勇奋郭伟成林飞马宝平晏海杨国宏陈杰田顺利范黎明
Owner HUATING COAL GRP