基于带压开采下覆岩移动破坏规律研究

Research on Overburden Movement and Failure Law based on Mining under Safe Water Pressure of Aquifer

本文以相似模拟试验为手段,对铁新煤矿9301回采工作面+470m水平煤层带压开采下覆岩移动规律进行研究。研究结果表明:当采掘工作面向左推进到250mm(50m)时,位于煤层上方的覆岩发生第一次离层破坏垮落现象,即初次来压现象;当煤层向左推进到1400mm(280m)时,共发生9次来压现象;煤层开采到140cm(280m)时,沉降基本发生到了地表。

In this paper,the movement law of overburden in 9301 face+470m horizontal coal seam of Tiexin Coal Mine is studied by means of similar simulation test.The results show that when the mining face is pushed to 250mm(50m)to the left,the overburden above the coal seam is broken and collapsed for the first time,that is,the first pressure;when the coal seam is pushed to 1400mm(280m)to the left,there are 9 times of pressure;when the coal seam is mined to 140cm(280m),the subsidence basically occurs to the surface.