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万城铅锌矿采用分段空场法开采,各中段之间未留顶柱,形成了由万7线、11线、15线及19线4条宽10~15m的矿柱分割的5个特大采空区,采空区体积达130万m3,矿柱高度在80~110m之间,矿柱及采空区的稳定性问题极为突出。基于这样的现状,2014年7月引进了4通道非接触式岩移实时在线监测系统,对井下矿柱与矿柱间、采空区顶底板间以及各矿柱上下盘间的位移进行在线监测。监测数据显示,7线与11线之间仅在7月一个月内发生了26 mm的位移,系统立即发出了预警,随后勘查到7线矿柱出现了显著的开裂现象。矿山立即停止附近区域生产作业,并加紧开展充填,使得该区域的监测数据逐渐趋于平稳。万城矿通过该系统实现了对矿柱及采空区稳定性的实时在线监测,为矿山的开采提供了有效的监测数据,极大地节省了矿山的人力物力等投入,并确保了复杂采空区条件下的安全生产。
The Wancheng lead-zinc mine was mined by the sub-field method. There was no top column between the middle sections, forming 5 sections divided by 4 pillars 10 to 15 m wide with 7 lines, 11 lines, 15 lines and 19 lines Large gob, gob area volume of 1300000 m3, pillar height between 80 ~ 110m, pillar and goaf stability problems are extremely prominent. Based on the current situation, a 4-channel non-contact rock migration real-time on-line monitoring system was introduced in July 2014 to monitor the displacement between the underground pillars and the pillars, between the top and bottom floors of the goaf and between the upper and lower pillars of the pillars. . Monitoring data showed that a 26 mm displacement occurred between July and November in only one month in July and the system immediately issued an early warning and subsequent exploration revealed significant cracking in the 7-pillared pillars. The mine immediately stopped production operations in the nearby area and stepped up filling. As a result, the monitoring data in the area gradually stabilized. Through this system, Wancheng Mine realized real-time on-line monitoring of the stability of ore pillars and goafs, provided effective monitoring data for mining and greatly saved manpower and material inputs of the mines and ensured the safety of complex goaf District production safety conditions.