基于“U”型下行通风的综放工作面瓦斯治理数值模拟研究  

Numerical simulation study on gas control in fully mechanized top coal caving face based on“U”downward ventilation

作　　者：张增辉 薛彦平 ZHANG Zenghui;XUE Yanping(China Shenhua Shendong Coal Group Baode Coal Mine,Xinzhou 036600,China;China Coal Technology and Engineering Group Shenyang Research Institute,Fushun 113122,China;State Key Laboratory of Coal Mine Safety Technology,Fushun 113122,China)

机构地区：[1]国家能源神东煤炭集团保德煤矿,山西忻州036600 [2]中煤科工集团沈阳研究院有限公司,辽宁抚顺113122 [3]煤矿安全技术国家重点实验室,辽宁抚顺113122

出　　处：《煤矿安全》2021年第12期183-187,193,共6页Safety in Coal Mines

基　　金：“十三五”大型油气田及煤层气开发科技重大专项资助项目(2016ZX05045-004-001)。

摘　　要：针对保德煤矿"U"型下行通风综放工作面回风隅角瓦斯超限问题,采用Fluent数值模拟软件,以81308综放工作面为模型,针对不同采空区抽采参数,对采空区及回风隅角瓦斯运移和瓦斯体积分数分布情况进行了数值模拟。模拟结果表明:基于81308综放工作面开采条件下,工作面采空区瓦斯抽采间距为90~120 m、抽采量为600 m^(3)/min为宜。根据模拟结果,在81308综放面回采期间进行了工程实践,从而确定了工作面合理的采空区瓦斯抽采参数,有效解决了"U"型下行通风高产高效综放工作面回风隅角瓦斯超限问题。Aiming at the problem of over-limit gas in the return air corner of the“U”type downward ventilation fully mechanized caving face in Baode Coal Mine,the law of gas migration in the stope and goaf was studied.Using Fluent numerical simulation software and using the 81308 fully mechanized caving face as a model,the gas migration and gas concentration distribution in the goaf and the return air corner are numerically simulated according to different mining parameters in the goaf.The simulation results show that based on the mining conditions of the 81308 fully mechanized caving face,the gas drainage spacing and the drainage volume in the goaf of the working face are respectively 90-120 m and 600 m^(3)/min.According to the simulation results,engineering practice was carried out during the mining in the 81308 fully mechanized top-coal caving face to determine the reasonable goaf gas drainage parameters of the working face and effectively solve the“U”type downward ventilation,high-yield and high-efficiency fully mechanized caving face return air.

关 键 词：“U”型下行通风 综放工作面 回风隅角 采空区埋管抽采 合理抽采参数 

分 类 号：TD712[矿业工程—矿井通风与安全]