低透气性煤层群高瓦斯采煤工作面强化抽采卸压瓦斯机理及试验  

Theory and experimental studies of enhanced gas drainage in the high-gas face of low permeability coal multi-seams

作　　者：卢平[1] 袁亮[2] 程桦[1] 薛俊华[2] 刘泽功[3] 童云飞[2] 王永[2] 蔡如法[2] 邓中[1] 

机构地区：[1]安徽建筑工业学院土木工程学院,安徽合肥230022 [2]淮南矿业集团公司,安徽淮南232001 [3]安徽理工大学能源与安全工程学院,安徽淮南232001

出　　处：《煤炭学报》2010年第4期580-585,共6页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(50974002);"十一五"国家科技支撑计划项目(2007BAK28B01);教育部重点科学技术研究项目(208063);安徽省教育厅自然科学研究基金资助项目(KJ2010A058)

摘　　要：针对低透气性高瓦斯煤层群首采卸压层瓦斯涌出量大、瓦斯治理困难的现实条件,在模型试验和理论研究的基础上,揭示出煤层群首采关键卸压层开采后采动影响区内顶、底板岩层裂隙的动态演化规律和卸压瓦斯运移规律,发现采空区侧存在"竖向裂隙发育区",弯曲下沉带和底板膨胀变形带内煤体发生膨胀变形,煤层的透气性显著增加。2371(1)工作面煤气共采实践表明,工作面最大绝对瓦斯涌出量70.46m3/min,平均56.71m3/min,瓦斯抽采率达85.2%,其中抽采的高浓度瓦斯比例为67.25%,抽采的低浓度瓦斯比例为32.75%,保证工作面的安全回采,实现了煤与瓦斯安全高效开采。On the basis of model test and theory research for the problem of high gas emission when mining the key coal-seam in the multi-seams coal of the highly gas content and low permeability and the difficult actual condition of gas control,the permeability of the coal seam significantly increases because of the existence of ＂the vertical crevasse growth area＂ beside the mined direction,the curving submerged belt and the bulgy deformation band in the motherboard in coal,which is very benefit for gas drainage.The research provides theory for disposing mining holes during the process of stress-relief and gas mining in the key mining stress-relief layer of coal multi-seams.The key remote mining of Panyi Coal Mine 2371 （1） workface gas mining on the working surface reveals that the most greatly absolute gas emission quantity is 70.46 m3/min,average 56.71 m3/min.The gas drainage rate amounts to 85.2%.Besides,high concentration gas drainage rate up to 67.25% and low concentration gas just only 32.75%.The experiment result shows that the utilization of coal and gas mining together not only controls workface gas emission,but also achieves mining clean gas safely and effectively in the process of coal mining.

关 键 词：低透气性 煤层群 高瓦斯 强化抽采 卸压瓦斯 

分 类 号：TD712.6[矿业工程—矿井通风与安全]