An equipment system for a roadway-free coal-pillar-free self entry-retaining mining construction method

Abstract

An equipment system for a roadway-free coal-pillar-free self entry-retaining mining construction method is provided. The system mainly comprises a transition support, end supports, ultra-back supports and rapid withdrawing supports. Working plane gate entries during mining are free of tunneling, a regular coal wall can be cut at a mining district end through a coal cutter and is adopted as one laneway's side of the gate entries, the other side is formed through top cutting, and a top plate falls and then automatically form a laneway's side, thus forming the gate entries in a coal extraction. The coal cutter is controlled in a digital manner during end coal cutting, and automatically cuts an end lateral coal wall to form a vertical straight line to be adopted as one side of the gate entries. A scraper machine cooperates with an arc coal catching plate of the coal cutter to clean float coal at the end as far as possible. The transition support, the end supports, the ultra-back supports and the rapid withdrawing supports can provide support and protection during working processes and can move forward along with coal mining equipment.

Description

technical field [0001] The invention relates to supporting equipment for working faces in coal mines, in particular to an equipment system for the mining method of self-retained roadway without roadway and coal pillar, which provides guarantee for the implementation of the mining method without roadway and coal pillar. Background technique [0002] At present, in the process of longwall mining, it is generally as follows figure 1 The 121 construction method is used as shown, that is, two roadways need to be excavated in one working face, and a coal pillar is reserved as a support. Specifically, each working face 10 includes an upper trough 11, a lower trough 12 and a mining face 13, the upper trough 11 of each working face 10 is connected to the belt downhill passage 14, and the lower trough 12 of each working face 10 is connected back to The wind downhill passage 15 is also provided with a track downhill passage 16 in addition. In the current structure, coal pillars need ...

AI Technical Summary

Problems solved by technology

In the current structure, coal pillars need to be reserved, resulting in a large waste of resources

Moreover, each working face needs to excavate two roadways, and the work efficiency is low

[0003] With the large-scale coal mining, the amount of coal resources is decreasing day by day, especially in today's coal economic depression, the traditional mining methods of leaving coal pillars and digging roadways along the goaf have caused problems such as high mining costs and low coal recovery rates have become increasingly prominent

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