Method for increasing recovery rate of fully mechanized caving face

A fully mechanized caving face and recovery rate technology, which is applied in surface mining, earth drilling, underground mining, etc., can solve the problem of low recovery rate of fully mechanized caving face, so as to alleviate energy shortage, reduce fire hazards and safety significance significant effect

Inactive Publication Date: 2014-04-02
DATONG COAL MINE GRP
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Problems solved by technology

[0003] In order to solve the problem of low recovery rate of the fully mechanized caving face, the present invention provides a method for improving the recovery rate of the fully mechanized caving face

Method used

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Embodiment Construction

[0011] The method of improving the recovery rate of fully mechanized caving working face is to cut coal only in the first 20 meters of coal seam, and press the roof of the working face after the first 20 meters of coal seam, and carry out the coal mining operation according to the cycle of one knife, one discharge and multiple rounds of coal discharge, until the end of the work 60 meters before the stop production line on the face, and the mining-drawing ratio is greater than or equal to 1:1.2 and less than 1:1.1, the coal-drawing step is 0.8-1.2m, and the coal-drawing ratio is greater than or equal to 1:1.1, the coal-drawing step is At 0.6-0.8m, from 60 meters before the production stop line to the stop production line, only coal is cut.

[0012] In the method for increasing the recovery rate of the fully mechanized caving face mentioned above, the hydraulic support for top-coal caving is selected from the low-level top-coal caving hydraulic support. The model of the middle su...

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Abstract

The invention relates to a coal mining method of a fully mechanized caving face, in particular to a method for increasing the recovery rate of a coal face. The first 20-meter coal seam is only subjected to coal cutting; behind the first 20-meter coal seam, a working surface is pressed by a top plate; coal mining operation is performed by the circulation of caving coal according to one-cutter one-caving multi-wheel interval sequence until 60 meters before a stop line of the working surface; when the caving ratio is more than or equal to 1:1.2 and less than 1:1.1, the coal caving interval is 0.8 to 1.2 m; when the caving ratio is more than or equal to 1:1.1, the coal caving interval is 0.6 to 0.8 m; from 60 meters before the stop line to the stop line, only coal cutting is performed; a top coal caving hydraulic bracket is selected as a low-level top coal caving hydraulic bracket; equipment used by the fully mechanized caving face is selected, so that the recovery rate of the fully mechanized caving face can be greatly increased, materials, working time and cost are saved, the construction efficiency is completely exerted, investment of staff, equipment, cost and work amount is effectively realized, the recovery rate of the fully mechanized caving face is increased, the coal mining efficiency can reach to above 93%, and an important effect is achieved on sustainable development of a mine.

Description

technical field [0001] The invention relates to a coal mining method for a fully mechanized caving face, in particular to a method for improving the recovery rate of a fully mechanized caving face. Background technique [0002] According to statistics, the average recovery rate of fully-mechanized caving working faces in my country reaches 81% to 83%. According to the coal industry policy, the recovery rate of thick coal seam mining working faces must reach more than 93%. Therefore, it is important to increase the recovery rate of fully-mechanized caving working faces An important issue that needs to be solved urgently; the coal mining method of the fully mechanized caving face is generally the method of fully mechanized top coal caving, and according to the analysis of the coal loss of fully mechanized top coal caving, the coal loss of fully mechanized top coal caving is in the following two aspects: on the one hand It is the loss determined by the design of fully mechanized ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16
Inventor 于斌宫全红刘开宇郭瑞永薛福胜乔小平
Owner DATONG COAL MINE GRP
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