爆破扰动诱发煤与瓦斯突出机理研究  

Mechanism Study of Coal and Gas Outburst Induced by Blasting Disturbance

作　　者：王浩[1,2,3] 左宇军 于美鲁[1,2,3] 刘勤志 WANG Hao;ZUO Yujun;YU Meilu;LIU Qinzhi(Mining School,Guizhou University,Guiyang,Guizhou 550025,China;Guizhou Key Laboratory of Comprehensive Utilization of Non-metallic Mineral Resources,Guizhou University,Guiyang,Guizhou 550025,China;Engineering Center for Safe Mining Technology Under Complex Geologic Condition,Guiyang,Guizhou 550025,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]贵州省非金属矿产资源综合利用重点实验室,贵州贵阳550025 [3]复杂地质矿山开采安全技术工程中心,贵州贵阳550025

出　　处：《矿业研究与开发》2018年第7期43-47,共5页Mining Research and Development

基　　金：国家自然科学基金项目(51574093);贵州省应用基础研究计划重大项目(JZ字[2014]2005-1);贵州省高层次创新型人才培养(百层次)项目(黔科合人才(2016)4011号);国家"十二五"科技支撑项目(2012BAB08B06);贵州大学研究生创新基金项目(研理工2017083)

摘　　要：炮采依然是一些高瓦斯矿区的主要开采方式,研究爆破扰动诱发突出的机理具有重要的理论与实际意义。通过理论计算和数值模拟分析了爆破扰动诱发煤与瓦斯突出的机理。研究表明,炮采工作面煤体及围岩裂隙发育,瓦斯运移通道较多,有利于瓦斯的运移和集聚;爆破扰动减弱了瓦斯的吸附能力,增加了瓦斯的游离量;爆破使巷道潜能瞬间释放,造成煤岩体的应力状态发生突变,而应力的急剧变化在一定的条件下极易导致煤体的瞬间失稳而诱发煤与瓦斯突出。Blasting is still the main mining method in the high-content gas region, and thus the mechanism study of coal and gas outburst induced by blasting disturbance has an important theoretical and practical significance. This mechanism was analyzed by theoretical calculation and numerical simulation. The study showed that the fracture of coal body and surounding rock at the working face of blasting mining developd, and many gas migration channels exsisted. Above two factors were conductive to the gas migration and agglomeration. The blasting disturbance reduced the adsorption capacity of the gas and increased the amount of free gas. Blasting made the roadway potency instantaneously release, resulting in the sudden change of coal rock stress state, and nevertheless the rapid change of stress under certain conditions could easily lead to the instantaneous loss of coal stability and induce coal and gas outburst.

关 键 词：开采扰动 瓦斯突出 数值模拟 

分 类 号：TD713[矿业工程—矿井通风与安全]