高强度开采低瓦斯煤层时瓦斯涌出的时空分布特征及关键影响因素  

Temporal and spatial distribution characteristics and key influencing factors of gas emission in coal seam with low gas content by high intensity mining

作　　者：龚选平 陈龙 陈善文 白廷海 林海飞[3] 高涵 成小雨 GONG Xuanping;CHEN Long;CHEN Shanwen;BAI Tinghai;LIN Haifei;GAO Han;CHENG Xiaoyu(China Coal Energy Research Institute Co.,Ltd.,Xi’an 710054,China;China Coal Huajin Group Co.,Ltd.,Hejin 043300,China;Xi’an University of Science and Technology,Xi’an 710054,China)

机构地区：[1]中煤能源研究院有限责任公司,陕西西安710054 [2]中煤华晋集团有限公司,山西河津043300 [3]西安科技大学,陕西西安710054

出　　处：《矿业安全与环保》2020年第4期17-23,28,共8页Mining Safety & Environmental Protection

基　　金：国家自然科学基金重点项目(51734007)。

摘　　要：瓦斯涌出受诸多因素的影响,为了研究低瓦斯煤层综放工作面高强度开采时瓦斯涌出的时空分布特征及关键影响因素,采用现场实测的方法,分别研究了高强度开采条件下低瓦斯综放工作面生产班和检修班的瓦斯浓度分布特征,以及煤炭产量、配风量、矿山压力、工作面推进速度和煤层瓦斯含量对瓦斯涌出的影响。结果表明:检修班工作面的瓦斯浓度受采空区漏风流的高浓度瓦斯影响较大,而生产班工作面的瓦斯浓度主要受采落煤释放瓦斯的影响;工作面煤壁瓦斯涌出量约为75.17%,采空区瓦斯涌出量约为24.83%;通过对不同影响因素的研究,得出工作面的煤炭产量和工作面推进速度是影响高强度开采低瓦斯煤层综放工作面时瓦斯涌出的关键因素。The gas emission is affected by many factors,in order to study the temporal and spatial distribution characteristics and key influencing factors of gas emission in fully mechanized working face of coal seam with low gas content by high intensity mining,by means of field measurement,the gas concentration distribution characteristics and the effects of coal production,air supply amount,mine pressure,advancing speed in the working face and coal seam gas content on gas emission in production and repair classes in fully mechanized working face of coal seam with low gas content by high intensity mining are studied.The results show that the gas concentration in the working face of the production class is greatly affected by the high concentration gas in the air leakage flow in goaf,the gas concentration in the working face of production class is mainly affected by the gas released from coal mining;the gas emission from coal wall of the working face accounted for 75.17%,and the goaf accounted for 24.83%;through the study of different influencing factors,it is concluded that the coal production and the advancing speed of the working face are the key factors that affect the gas emission in fully mechanized working face of coal seam with low gas content by high intensity mining.

关 键 词：低瓦斯煤层 综放工作面 上隅角 瓦斯涌出 分布特征 影响因素 

分 类 号：TD712[矿业工程—矿井通风与安全] TD713