摘要
矿井进入深部开挖后,巷道围岩内部出现破裂现象。通过考虑巷道围岩碎胀性和地质分层的影响,得出了计算巷道围岩内部破裂范围的位移解析表达式;分析了锚杆对巷道两帮的影响,获得了维持巷道两帮稳定所需的最小锚固段长度。最后通过算例进行验证,为深部巷道支护设计提供了一定的理论依据。
There was a crack phenomenon occurred within the surrounding rock of the mine roadway after excavations in the deep section of the mine. In consideration of the influences of the surrounding rock broken and swelling and the geological bed separation, a displacement analytical expression to calculate the crack scope within surrounding rock of the roadway was obtained. The paper analyzed the bolt affected to the two sidewalls of the roadway and a min bolt anchoring length required to keep the two sidewall stability of the roadway was obtained. The verification on the calculation examples could provide certain theoretical basis to the support design of the mine roadway in the deep mine.
出处
《煤炭工程》
北大核心
2013年第2期80-82,86,共4页
Coal Engineering
基金
国家"十一五"支撑计划子课题"深井巷道围岩变形特性与支护优化设计研究"(2006BAJ21B04)
关键词
深部巷道
分层围岩
解析解
破裂区
mine roadway in deep mine
individual surrounding rock
analytical solution
cracking zone
