摘要
针对高瓦斯矿井U型通风方式回采工作面上隅角瓦斯易超限问题,采用数值模拟与现场试验相结合的研究方法,对采空区立体化瓦斯抽采措施的工作面上隅角瓦斯治理效果进行研究。以晋煤集团成庄煤矿4312综放工作面为研究对象,通过数值模拟优选出高效瓦斯抽采措施,建立了"高位钻孔+采空区联络巷埋管"采空区立体化瓦斯抽采体系,通过数值模拟手段预测得到采取该抽采措施体系后工作面上隅角瓦斯浓度最大值降低至0. 42%,该抽采措施体系的现场应用中工作面上隅角实测瓦斯浓度处于0. 30%～0. 45%之间,现场应用效果验证了数值模拟结果的正确性。研究结果表明,采空区瓦斯立体化高效抽采措施能够治理高瓦斯矿井回采工作面U型通风方式下上隅角瓦斯超限难题。
In order to solve the problem that the gas in the upper corner of the mining face of the U ventilation mode was easy to exceed the limit in the high gassy mine,based on the research method of numerical simulation and field test,the effect of three-dimensional gas drainage measures in gob on gas control in the upper corner of the mining face was studied. Taking 4312 fully mechanized mining face in Chengzhuang Coal Mine as the research object,high performance gas extraction measures were selected through numerical simulation,and the three-dimensional gas extraction system of"high position bores+extraction pipe buried in the link roadway of gob"in gob was established. In the numerical simulation of the system,the maximum value of gas concentration in the upper corner of the mining face decreased to 0. 42% numerical simulation. In the field application of the system,the value of gas concentration in the upper corner of the mining face was between 0. 30% and 0. 45%. The field application effect verified the correctness of the numerical simulation results. The research results showed that the three-dimensional efficient gas extraction system could solve the problem that the gas in the upper corner of the mining face of the U ventilation method was easy to exceed the limit in the high gassy mine.
作者
姜黎明
JIANG Li-ming(Institute of Coal Safety and Technology, China Coal Research Institute, Beijing 100013, China;State Key Laboratory of Coal Efficient Mining and Clean Utilization (China Coal Research Institute) , Beijing 100013, China)
出处
《煤炭工程》
北大核心
2019年第4期10-15,共6页
Coal Engineering
基金
国家科技重大专项资助项目(2016ZX05067001-002)
关键词
高瓦斯矿井
综放工作面
采空区瓦斯抽采
U型通风
CFD模拟
high gassy mine
fully mechanized caving face
gas extraction in gob
U-type ventilation mode
CFD numerical simulation
