摘要
为明晰保德煤矿地应力分布状态及特征,改善巷道围岩支护效果,采用水压致裂法开展了井下地应力实测。测试结果表明,测试区域构造应力占据主导地位,三向应力间的关系为SH>Sv>Sh;最大水平主应力值为12.24~13.51 MPa,方向位于N56°E~N61°E;最大主应力与巷道夹角约为67°,对巷道围岩的稳定性有着较大影响。明确了保德煤矿巷道所处的应力环境及应力分布特征,为保德煤矿巷道围岩稳定性分析及支护参数设计提供了工程指导和参考。
In order to clarify the distribution state and characteristics of the in-situ stress in Baode coal mine, and to improve the support effect of the surrounding rock of the roadway, the in-situ stress measurement was carried out by the hydraulic fracturing method. The test results show that the tectonic stress plays a role dominate in the test area. The relationship between the three-dimensional stress is SH>Sv>Sh. The maximum horizontal principal stress is 12.24-13.51 MPa, and its direction is in the range of N56°E-N61°E. The angle between the maximum principal stress and the roadway is about 67°,which has a greater impact on the stability of the surrounding rock of the roadway. Clarified the stress environment and stress distribution characteristics of Baode coal mine roadway, which provids engineering guidance and reference for Baode coal mine roadway surrounding rock stability analysis and support parameters design.
作者
吕情绪
Lyu Qingxu(Shendong Technology Research Institute,CHN Energy Group,Yulin 719315,China)
出处
《煤矿机械》
2021年第8期99-102,共4页
Coal Mine Machinery
关键词
地应力测试
分布特征
水压致裂法
巷道围岩稳定性
in-situ stress test
distribution characteristic
hydraulic fracturing method
stability of roadway surrounding rock
