摘要
城郊煤矿开采逐渐进入深部,主采煤层超过800 m,工作面长度超过300 m,采深和采长的增加使矿压显现程度和围岩应力更加复杂,增加了采场围岩控制的不确定性及难度。为了探究深部超长工作面的矿压显现规律,运用理论计算、数值模拟、现场实测等方法进行分析,得到基本顶破断规律;围岩应力分布特征及工作面前方应力峰值强度变化特点;液压支架工作阻力分布规律。
The main coal seam is over 800 m,and the working face length is over 300 m.The increase of mining depth and mining length makes the occurrence degree of ore pressure and surrounding rock stress more complex,which increases the uncertainty and difficulty of surrounding rock control in stope.In order to explore the development law of underground pressure in the deep ultra-long working face,theoretical calculation,numerical simulation,field measurement and other methods were used to analyze,and the basic roof breaking law was obtained.Distribution characteristics of surrounding rock stress and variation characteristics of peak stress intensity in front of working face;distribution law of working resistance of hydraulic support.
作者
王保强
卢恒
何常西
WANG Bao-qiang;LU Heng;HE Chang-xi(School of Energy and Mining Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)
出处
《煤炭技术》
CAS
北大核心
2021年第3期35-38,共4页
Coal Technology
关键词
深部超长工作面
矿压显现规律
工作阻力
deep ultra-long working face
development law of underground pressure
working resistance
