Layout method of roadway in step mining surface

Abstract

The invention discloses a layout method of a roadway in a step mining surface, and belongs to the technical field of coal mining. The purpose of safe and efficient mining of irregular side corner coalin a mine is achieved. The method comprises the following steps that two roadways are arranged on the stoping working surface, wherein one of the roadways is a linear roadway and the other one of theroadways is a roadway with a plurality of steps, and stoping working surface is divided into a plurality of sections by the step-shaped roadway; at the stoping stop lines of first two sections of thestoping working surface, a construction bracket withdrawal passage is extracted or a crossheading is adopted as a bracket withdrawal passage; an air return way and an auxiliary inlet roadway are separately arranged on the stoping working surfaces of the first two sections; and an air return way is arranged on the stoping working surface of the last section. Working surface unit production and working efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining, and in particular relates to a roadway layout method of a step mining working face. Background technique [0002] The coal mine adopts top-coal caving fully mechanized mining technology to recover coal resources. In order to achieve high yield and high efficiency and reduce the number of times of relocation, the length and width of the mining face should be as long as possible. Due to the impact of column retention, there are many areas in the mine where longwall working faces cannot be arranged. [0003] At present, there are various mining methods and techniques for scrap coal at home and abroad, which are mainly selected and determined according to the occurrence and geological conditions of scrap coal. Foreign corner coal mining mostly adopts continuous coal mining method, while domestic corner coal mining mainly adopts continuous mining, fully mechanized mining, high-grade general ...

AI Technical Summary

Problems solved by technology

Foreign corner coal mining mostly adopts continuous coal mining method, while domestic corner coal mining mainly adopts continuous mining, fully mechanized mining, high-grade general mining, blast mining, roadway mining, etc. Due to the complicated geological conditions such as stress concentration of corner coal , the blast mining efficiency is relatively low and it is not conducive to safe mining. Because the efficiency and safety performance of general mining is lower than that of continuous mining and fully mechanized mining, blast mining and general mining are generally not used for corner coal blocks where continuous mining and fully mechanized mining can be used craft

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