下沟煤矿瓦斯异常涌出原因分析及防治措施  

Reasons Analysis and Preventive Measures of Gas Unusual Gush in Xiagou Coal Mine

作　　者：安俊孝 郑武 郭晓阳[3] 王乃足 

机构地区：[1]华彬煤业股份有限公司,陕西彬县713500 [2]华彬煤业股份有限公司下沟煤矿,陕西彬县713500 [3]辽宁工程技术大学,辽宁阜新123000

出　　处：《煤矿安全》2016年第7期147-150,共4页Safety in Coal Mines

摘　　要：为解决下沟煤矿ZF301工作面切眼瓦斯异常涌出的问题,通过采用瓦斯地质理论对瓦斯异常涌出现象的原因进行研究,推断因切眼附近断层的存在,该区域煤层裂隙发育,煤体孔隙率增大,大量游离瓦斯储存在裂隙中,形成了瓦斯富集区;由于受到切眼掘进活动的扰动,煤柱侧煤壁产生了裂隙并与瓦斯富集区沟通,因受到通风方式等采掘技术因素的影响,其内的游离瓦斯经裂隙集中释放到巷道内,造成切眼瓦斯涌出异常。据此从地质因素和采掘技术因素2个方面分析了切眼瓦斯涌出异常的原因,并有针对性的提出了采用煤壁封堵与瓦斯抽采相结合的防治措施。In order to solve the gas unusual gush problems of ZF301 face of Xiagou Coal Mine,we research the reasons for the phenomenon of gas unusual gush by using gas geological theory,and infer that the existence of fault nearby the face could make the cracks of the coal seams developed,the coal porosity increased,and also make a large amount of free state gas stored in the cracks and could form gas-rich region. Due to the impact of excavation activities at working face,coal wall generated few cracks and communicated with the gas-rich region; the free-state gas in the gas-rich region centrally released into the roadway through the cracks by pressure and gas unusual gush. We analyzed reasons for the phenomenon of gas unusual gush according to the gas producing condition,storage condition and capping condition,and propose a targeted measure which combined coal wall blocking with gas drainage.

关 键 词：断层 瓦斯异常涌出 瓦斯富集区 裂隙发育 孔隙率 

分 类 号：TD712[矿业工程—矿井通风与安全]