煤柱高应力区煤体爆破卸压效果研究  

Study on stress relief effect of coal body blasting in high stress zone of coal pillar

作　　者：李鹏 刘志刚[2] 

机构地区：[1]山东能源淄矿集团唐口煤业公司,山东济宁272055 [2]中国矿业大学矿业工程学院,江苏徐州221116

出　　处：《煤炭工程》2017年第12期66-68,72,共4页Coal Engineering

摘　　要：卸压爆破作为较为重要的一种冲击地压防治措施,在冲击地压矿井得到很广泛应用,基于数值模拟研究方法,采用FLAC^(3D)非线性动力模块与Mohr-Coulomb弹塑本构方程建立了5303轨道巷非线性动力计算模型,研究巷道在煤柱高应力区域的应力集中情况及爆破卸压效果。研究结果表明:在巷道接近煤柱边界区域时,存在较高应力集中现象;动力模拟显示模型爆破区域垂直应力峰值出现了明显降低,高应力区向煤体深部进行了转移;在5303轨道巷爆破卸压现场监测结果可知应力降低幅度均达到65%以上。As an important rock - burst prevention measure, stress relief blasting has been widely used in mine rock - burst. Based on the numerical simulation method, we established the calculation model of nonlinear dynamic of 5303 track roadway, by using FLAC^3D nonlinear dynamic module and Mohr - Coulomb elastoplastic constitutive equations, to study the stress concentration and the stress relief effect of blasting on high - stress area near coal pillar. The results show that ： when the roadway aproaches the coal pillar boundary region, high stress concentration phenomenon is more obvious in roadway; the dynamic simulation displays vertical stress peak on blasting area of model is significantly reduced, the high stress area is transferred to the deep eoal; aceording to monitoring results, stress reduetion is more than 65% by blasting in 5303 traek roadway.

关 键 词：煤柱应力区 应力集中 数值模拟 动力分析 爆破卸压 

分 类 号：TD324[矿业工程—矿井建设]