露天矿山下部采空区稳定性监测技术应用研究

Application Research on the Stability Monitoring Technology of Goaf Under Open-pit Mine

因资源整合矿区范围扩大，近年来地下开采转露天开采的矿山渐渐增多。针对原地下开采遗留采空区威胁矿山安全生产的问题，以某多金属矿山为研究对象，在重点开采区域建立了一套32通道无线微震监测系统，多次人工定点爆破测试定位精度结果表明，监测范围内的震源实际定位误差为4．2～10．0m，系统正式投入使用后，在采空区稳定性判别、井下民采活动定位等方面发挥了重要作用，成功预警了采空区失稳大塌方事件，确定了民采活动范围，消除了地下采空区给露天生产带来的安全隐患。

Due to the mine resources continue to integrate, more and more underground mines turn into open-pit mines. But the goals caused by the original underground mining threatened the safe production of mine. According to the problem, taking a multi-metal mine as the research exam- ple, a wireless microseismic monitoring system with 32 channels was established in the key mining area. And the po- sitioning accuracy was tested repeatedly by artificial fixed blasting. The test results showed that the actual source loca- tion error was 4.2 ～10.0 m in the monitoring scope. After officially using, the monitoring system played an important role in judging the slope stability and positioning the private mining activities, which successfully predicted the landslip e- vents of slope failure, determined the area of private mining activities and eliminated the safety hazards of goaf in the open-pit mining.