大红山铁矿深井大规模开采岩爆综合评价  

Comprehensive Evaluation of Rockburst on Deep and Large-scale Mining in Dahongshan Iron Mine

作　　者：黄波[1] 李庶林[1] 高真平 胡静云[2] 吴锡煌 徐刚 

机构地区：[1]厦门大学建筑与土木工程学院,福建厦门361005 [2]长沙矿山研究院有限责任公司,湖南长沙410012 [3]玉溪大红山矿业有限公司,云南玉溪653100

出　　处：《金属矿山》2016年第5期19-25,共7页Metal Mine

基　　金："十二五"国家科技支撑计划项目(编号:2013BAB02B06);国家科技部科研院所技术开发研究专项(编号:2013EG215024)

摘　　要：大红山铁矿是特大型深埋矿床,在深井开采时遇到的一个技术难题就是岩爆。为评价岩爆倾向性烈度,对该矿深部5种岩样进行室内岩爆倾向性试验,并采用声发射方法确定岩石接近峰值强度时的卸载点;通过地应力现场实测和三维有限元数值模拟,获得深部最大主应力和巷道开挖后最大切向应力;采用最大主应力判别法、切向应力准则、强度脆性系数法、变形脆性系数法、弹性应变能储存指数法这5种评价方法,对岩样的岩爆倾向性进行单项指标评价,分别得到各矿岩岩爆倾向性烈度。然后采用模糊数学法,对各单项指标评价结果进行综合评价。结果表明:深部主要矿岩体总体上具有发生中等岩爆和强烈岩爆的倾向性。最后,通过评价结果,在岩层图上绘制典型水平岩爆倾向性分布区域,可为深部开采和岩爆防治提供参考依据。Dahongshan iron mine is oversize and deep-buried deposit,and a technical problem that must be faced in deep mining is rockburst.To evaluate the intensity of rockburst proneness,indoor rockburst pronenss experiments of five kinds of rock samples from deep mine are recorded,and acoustic emission is used to control the unloading point near to peak strength of rock;According to the ground stress measured in field and result of three-dimensional finite element numerical analog,maximum primary stress in deep mine and tangential stress values after tunnel excavation are obtained.Five judging methods of maximum primary stress criterion,tangential stress criterion,strength brittleness coefficient method,deformation brittleness coefficient method and elastic strain energy storage index method are used to make an estimation of one index about rockburst proneness,and rockburst proneness intensity of rocks in Dahongshan iron mine is obtained;Then,the method of fuzzy mathematics is used to make an integrated evaluation.The result shows that there is medium and strong rockburst proneness of main rocks in deep mining.At last,distribution map of rockburst proneness in typical level is plotted according to the evaluation result,which provides reference for mining and rockburst control in deep mining.

关 键 词：深井矿山 岩爆倾向性 评价指标 模糊数学 综合评价 

分 类 号：TU45[建筑科学—岩土工程]