高应力低渗透煤层深孔爆破增透机理与效果  

Enhancing Permeability Mechanism and Effectiveness of Deep-hole Blasting in High Stressed and Low Permeable Coal Seam

作　　者：王海东[1] 

机构地区：[1]煤炭科学研究总院沈阳研究院,辽宁抚顺113122

出　　处：《煤矿安全》2012年第B10期17-21,共5页Safety in Coal Mines

摘　　要：采用Hoek-Brown(HB)准则转化得到的等效Mohr-Coulomb(MH)准则表征煤体的本构特性,建立了高应力煤层深孔爆破的有限差分动力数值计算模型。通过数值解与理论解的对比验证了FLAC3D动力模块模拟爆炸应力波在煤岩体介质中传播规律的有效性。在爆炸应力波、爆生气体单独作用下以及两者共同作用下,对高应力煤层深孔爆破致裂增透过程进行了3种工况的动力数值模拟,通过模拟得出深埋高应力煤体深孔预裂控制爆破影响的主要因素及作用机理。A finite difference dynamic numerical calculation model for high stressed coal seam deep-hole blasting was set up by using the equivalent MH criterion which transformed from HB criterion to represent the constitutive behavior of coal body.Through the comparison between numerical solution and theoretical solution,the effectiveness of FLAC3D power module in simulating the propagation laws of blasting stress wave in coal or rock mass was verified.Under the respective action of blasting stress and detonation gas,or under the action of both of them,three dynamic simulations on coal permeability enhancement by deep-hole blasting were conducted,and the key factors and mechanisms affecting deep-hole controlled blasting in high stressed coal body are achieved by simulation.

关 键 词：高应力低渗透煤层 深孔爆破 爆炸应力波 爆生气体 

分 类 号：TD235.37[矿业工程—矿井建设]