深埋硬岩矿床岩爆控制研究

冬瓜山铜矿是我国开采的首家有岩爆倾向的深埋硬岩金属矿山，对此开展了岩爆控制研究。应用该矿床典型岩石的变形全过程试验及峰值荷载变形条件下的松弛试验等室内试验结果和现场岩爆调查资料，分析了该矿矿岩的岩爆倾向性和井巷岩爆特性，从岩爆控制角度，采用数值分析方法以能量释放率为衡量指标，对采场结构参数、开采步骤等进行了优化。在此基础上，提出该矿床开采采用控制能量释放、减少能量储存、合理支护和进行岩爆监测等岩爆控制的原则和措施。

STUDY ON ROCKBURST CONTROL IN DEEP-SEATED HARD ORE DEPOSIT

Dongguashan Copper Mine is the first rockburst-prone deep-seated metal ore deposit in China where rockburst control study has been performed. The rockburst proneness of typical rocks of the deposit and the properties of rockbursts of the workings at the mine are analyzed with the results of laboratory tests, namely, tension tests, complete stress-strain tests and tests of stress relaxation under the deformation at peak load, and in-situ rockburst information recorded during the drifting of the development workings. The stope structure parameters and mining steps of the deposit are optimized with numerical simulation method based on energy release rates in order to control rockbursts of stope. On the basis of this study, the principles and measures of rockburst control in the course of the mining in the mine, that is, control of energy release, reduction of energy storage, rational support and rockburst monitoring, are provided and discussed.