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Wave-type mining method for inclined mining working face of deep heavy-water mine

A technology for large water mines and mining methods, which is applied to drainage, surface mining, mining equipment and other directions, can solve the problems of water and influence on the safety production of down-cut working faces, avoid hydration damage, avoid immersion, and improve bearing reliability. sexual effect

Pending Publication Date: 2021-02-19
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to fundamentally solve the problem that the safe production of the down mining working face of deep large water mines is affected by water, the present invention provides a wave mining method for the down mining working face of deep large water mines. The specific technical scheme is as follows

Method used

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  • Wave-type mining method for inclined mining working face of deep heavy-water mine
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  • Wave-type mining method for inclined mining working face of deep heavy-water mine

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Embodiment 1

[0030] In order to fundamentally solve the water damage problem existing in the undercut working face of Dashui mine, a wave-type mining method for the undercut working face of deep Dashui mine is provided, which specifically includes:

[0031] Step S1. Determine the cycle step distance of the working face mining, and determine the peaks and troughs in each mining segment according to the cycle step distance, set the elevation angle and depression angle of the shearer to cut coal, and the shearer according to the design A certain elevation angle and depression angle alternately advance the coal mining face, forming a wavy bottom plate behind the coal mining face, which can effectively block the water behind the working face from entering the coal mining face.

[0032] Among them, the periodic pressure step distance is the periodic pressure step distance of the basic roof. By monitoring and determining the working resistance of the hydraulic support on the working face, the peri...

Embodiment 2

[0040] In this embodiment, on the basis of Example 1, the beneficial effect of the wave mining method on the down mining face of a deep flood mine is described by taking the wave mining of the 101 working face of a certain mine as an example.

[0041] The 101 coal mining face of a certain mine is undercut mining as a whole, and a large amount of water gushes from the roof in the goaf, and the amount of water gushing behind the highest face is as high as 640m 3 / h, leading to poor production and operation environment on the working face, long-term immersion of coal mining machines and other equipment in the working face, affecting their performance and life, and the front scraper conveying water charcoal affects coal quality. In addition, the small coal pillars in the section have been eroded by water for a long time, which affects its strength and stability, and poses a serious threat to the safety and stability of the mining roadway. In order to solve the water hazard problem...

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Abstract

The invention provides a wave-type mining method for an inclined mining working face of a deep heavy-water mine, and relates to the technical field of coal mining. The problem of water accumulation ofthe inclined mining working face of the heavy-water mine is solved. The mining method comprises the steps that a periodic weighting length of working face mining is determined, the wave crest and thewave trough in each mining subsection are determined according to the weighting length, an elevation angle and a depression angle of coal cutting are determined, a coal mining machine alternately pushes a coal mining working face in each subsection according to the elevation angle and the depression angle, and a wavy bottom plate is formed behind the working face; drainage pipes are buried in thewave troughs behind the working face, drainage pipelines are arranged above ditches of an air return gate road, and the drainage amount of the gate road is increased; and an auxiliary conveying channel is formed to discharge sewage, a mechanical grid is installed in the auxiliary conveying channel, and coal slime of the mechanical grid is conveyed to a coal conveying system through an auxiliary conveying belt. According to the wave-type mining method, the working environment of the inclined mining working face is improved, long-term water soaking of equipment is avoided, the coal moisture content is decreased, and the coal pillar bearing performance is further improved.

Description

technical field [0001] The invention relates to the technical field of coal mine mining, in particular to a wave-type coal mine mining method applied to deep flood mines and inclined mining working faces. Background technique [0002] According to the "upper three zones" theory, a water-conducting fracture zone will be formed in the coal mining face during the mining process. Especially in the coal mining face of deep large water mines, once the water-conducting fracture zone conducts the aquifer above the coal seam, the water body in the aquifer will flow into the working face, affecting the normal and safe production of the working face, and the inclined mining face All the more affected. A large amount of water from the rock-covered aquifer pours into the working face, which will deteriorate the working environment of the working face, affect the normal operation and service life of the coal mining machine, scraper conveyor and hydraulic support at the working face, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21F16/00E21F13/06
CPCE21C41/18E21F16/00E21F13/06
Inventor 杨永杰黄刚王胜宫立昊蒋涵
Owner SHANDONG UNIV OF SCI & TECH
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