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地下开采的矿山,当矿体开挖后,原岩由于失去应力平衡,应力要从新分布,甚致产生岩移。为了测量岩移量与作出预报,矿山往往在采区的不同部位钻凿深孔,用两点式位移计、多点式位移计、电阻式位移计等测量岩体的局部位移值。但是在深钻孔内安装固定位移计的方法如金属涨壳式、楔型式、钢丝爪式、压缩木式以及钢丝爪式和压缩木式的联合式,都存在一些问题。压缩木式服务时间短,仅能
Underground mining, when the ore body after excavation, the original rock due to the loss of stress balance, the stress should be re-distribution, or even produce rock. In order to measure the amount of rock migration and make a prediction, the mines often drill deep holes in different parts of the mining area. The displacement of the rock mass is measured by two-point displacement meter, multi-point displacement meter and resistance displacement meter. However, there are some problems with installing fixed displacement gauges in deep boreholes, such as metal shaving, wedge, wire claw, compression wood, wire claw and compression wood. Compressed wood service time is short, only