金川深部典型岩石岩爆倾向性多因素综合评判
首发时间:2009-06-24
摘要:以金川二矿区深部为研究对象,通过对其花岗岩等六种典型岩样进行峰前卸载等多种常规力学实验研究,结合现场勘察数据,采用基于岩性本身、围岩及应力条件等不同评判角度的岩爆判据:强度脆性系数(R)法、Barton法、弹性应变能指数(WET)法和围岩质量RMR法,分别对其进行岩爆倾向性的理论预测,并引入模糊数学综合预测方法以上述各单一判据结果为指标,系统地多因素评价金川二矿区的岩爆倾向性。结果表明,花岗岩、大理岩等六种岩样均具有弱岩爆发生倾向,其结果与现场符合较好,并对矿山生产中岩爆防治有一定的科学指导意义。
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MULTI-FACTORIAL COMPREHENSIVE ESTIMATION FOR JINCHUAN’S DEEP TYPICAL ROCKBURST TENDENCY
Abstract:The deep rock in Jinchuan 2nd mining area is taken as the studied object. According to several mechanical experiment researches on six kinds of typical rocks, such as granite etc, while combined with the information on site available, different rockbust criterions like Coefficient(R) method, Barton method, Elastic Strain Energy Index( ) method and Rock Mass Rating System method, were separately used based to theoretically predict the rockburst tendency of every rock, based on rock characteristic, surrounding-rock and stress conditions. Fuzzy mathematics comprehensive prediction method was introduced which is based on each single criterion results as the index. Results showed that six lithologies, such as granite, marble etc, are of weak rockbust tendency, which are in accordance with the insitu result, and will give some guidance for preventing rockburst in mining excavation.
Keywords: deep mining rock mechanics rockburst tendency integrated evaluation method
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