针对冬瓜山铜矿厚大矿体盘区隔离矿柱开采过程中的地压危害问题，应用数值模拟方法并采取微震监测等手段进行分析研究。结果表明开采过程中发生岩爆的可能性很低;由于隔离矿柱开采的技术条件劣化很多，位移和塑性区域明显增大，应该对单个开挖单元的空间体量加以控制。对模拟的54#隔离矿柱而言，开挖空间高度不宜超过50m，长度不宜超过48m，采用间隔开挖顺序能够降低工程岩体的应力集中度，对工程稳定有利。
Abstract
The underground pressure hazard in the mining of thick and large ore-body by using panel insulating pillar at Dongguashan copper was analyzed by numerical simulation and microseismic monitoring. Results reveal that rock burst in the mining process is unlikely to occur with very low probability. The volume of each excavation unit should be controlled because displacement and plastic zone increase obviously due to degraded technical condition of mining using insulating pillar. As regards the simulated insulating pillar 54#, the height of excavation space should not exceed 50m, and the length should not be more than 48m. Moreover, interval mining sequence could reduce the stress concentration of engineering rock mass, and is conducive to engineering stability.
关键词
岩体开挖 /
地压危害 /
微震监测 /
数值模拟
Key words
rock mass excavation /
ground pressure hazard /
microseismic monitoring /
numerical simulation
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