Longwall downward stratified coal gangue false roof coal mining method

A technology of longwall descending and coal mining method, which is applied in underground mining, surface mining, earth drilling and mining, etc. It can solve the problems of low overall efficiency, many production processes, and high production cost, and achieve the reduction of material consumption and labor intensity , the effect of improving the overall efficiency

Active Publication Date: 2014-10-08
TAIYUAN DESIGN RES INST FOR COAL IND
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  • Abstract
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AI Technical Summary

Problems solved by technology

When mining the upper layer, in order to avoid excessive surface pressure when the next layer is mined, it is often necessary to lay metal mesh or plastic mesh as an artificial false roof. Large size, high production cost, low comprehensive efficiency and other disadvantages bring a lot of trouble to coal mining

Method used

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  • Longwall downward stratified coal gangue false roof coal mining method
  • Longwall downward stratified coal gangue false roof coal mining method
  • Longwall downward stratified coal gangue false roof coal mining method

Examples

Experimental program
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Embodiment Construction

[0017] Such as figure 1 , figure 2 , image 3 As shown, the longwall descending layered gangue false roof mining method is carried out according to the following steps:

[0018] The first step is to excavate the transport roadway 11 and the air return roadway 12 on both sides of the first coal seam 1 working face, and excavate the cut hole from the transport roadway 11 to the return air roadway 12 along the first coal seam 1 working face, and the shearer 6. The scraper machine 8 and the hydraulic support 5 are installed in the cut hole of the first coal seam 1, the belt conveyor 10 and the transfer machine 9 are installed in the transport roadway 11, and then the push coal mining is carried out, and the coal mined by the shearer 6 is Transported to the ground via scraper machine 8, transfer machine 9 and belt conveyor 10;

[0019] In the second step, during the continuous advancement of the work in the first coal seam 1, the hydraulic support 5 in the goaf is gradually wit...

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Abstract

The invention relates to a coal mining method, and in particular relates to a longwall downward stratified coal gangue false roof coal mining method, aiming at providing the longwall downward stratified coal gangue false roof coal mining method which takes a stone band as a false roof and is simple, convenient and low in percentage of shale content of raw coal. The method adopts the technical scheme that the stone band which has stable coalbed methane is taken as the false roof, so that the mixing quantity of gangue in the raw coal can be reduced, green mining is realized, the process of laying a metal net or a plastic net during slicing mining can be omitted, the labor intensity of workers can be lightened, the consumption of material is reduced, the comprehensive efficiency of coal mining is increased, and the method is widely applied to coal mining.

Description

technical field [0001] The invention relates to a coal mining method, in particular to a longwall downward layered gangue false roof mining method. Background technique [0002] Coal seams can be divided into two types according to their structure, one is simple coal seams without rock interlayers, and the other is complex coal seams with interlayer rocks. [0003] The rock interlayers in complex coal seams are mostly argillaceous rock, clay rock, kaolinite clay rock, carbonaceous mudstone or sandstone. For thick coal seams with large thickness and stable rock interlayers, the interlayer rocks are often easily mixed into the raw coal during the coal seam mining process, which not only increases the gangue content of the raw coal, but also increases the amount of coal washing , resulting in a significant increase in production costs. [0004] At present, my country usually adopts layered coal mining method for the mining of complex coal seams. The layered coal mining method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16
Inventor 白锦胜殷军练刘振刚
Owner TAIYUAN DESIGN RES INST FOR COAL IND
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