采动条件下底板岩层破坏深度动态测试研究及应用

Research and application of dynamic testing technology for floor rock damage depth under mining condition

为防止内蒙古准格尔矿区采动条件下底板灰岩水的突水威胁问题,现场通过钻孔植入方式布置一套光纤传感探测系统和一套电阻率CT法探测系统,在采动条件下对工作面底板破坏"两带"高度进行精细化探测。研究结果表明:结合光纤传感技术及电阻率CT探测技术综合判断底板破碎带高度为15m,导水裂隙带高度为32m。该工作面底板破坏"两带"高度探查结果不仅为底板防治水工作提供了重要的依据,而且对整个相似地层条件的矿区提高煤炭资源安全高效生产有着重要指导意义。

Aiming at the floor limestone water threat in Zhungeer Mining Area in Inner Mongolia,an optical fiber sensing system and a set of resistivity CT detection system were installed in the drill hole,which was applied in the precise detection of the height of fracture zone and water-conducting fissure zone（ the two-zone） in working face floor under mining condition. The results show that： according to the detection of optical fiber sensing technology and resistivity CT detection technology,the height of the floor fracture zone is 15 m,and the height of the water-conducting fissure zone is32 m. The two-zone height exploration results of the working face floor failure provided an important basis for the prevention and control of Ordovician limestone aquifers,and offered important guiding significance for improving the safe and efficient production of coal mining areas with similar conditions.