平山煤矿采空区高位钻孔瓦斯抽放数值模拟  

Numerical Simulation on Goaf Gas Drainage of High-level Borehole in Pingshan Coal Mine

作　　者：高玉坤[1,2] 肖善林 闫建浩 黄志安[1,2] 王春节[1,2] 付明明[1,2] 

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083 [2]北京科技大学矿山避险技术研究中心,北京100083 [3]山西保利平山煤业股份有限公司,山西沁水048205

出　　处：《煤矿安全》2017年第4期160-163,共4页Safety in Coal Mines

摘　　要：针对平山煤矿首采煤层11011工作面采空区瓦斯浓度较高和上隅角瓦斯超限问题,提出高位钻孔瓦斯抽放的治理方案。基于采空区高位钻孔参数布置方程,计算分析了11011工作面采空区瓦斯抽放问题,并通过Fluent软件模拟了高位钻孔下采空区瓦斯浓度分布,直观展现了瓦斯浓度的分布变化。把高位钻孔布置在双"U"的外"U"中,离回风巷平距20 m处开孔,开孔高度为4 m。现场实验数据显示,该抽放技术使得上隅角瓦斯浓度低于0.5%。In order to solve the problem of high gas concentration in goaf and gas exceeding the limit in the upper comer at11011 working face of 3~ coal seam in Pingshan Coal Mine, the goaf gas drainage of high-level borehole was proposed. On thebasis of the design parameter equations of high-level borehole in goaf, this paper analyzed the gas drainage problem of goaf at 11011 working face of 3# coal seam in Pingshan Coal Mine. Then, we used the Fluent to simulate the gas concentration distribution ingoal of high-level borehole, which displayed the distribution change of gas concentration. The high-level borehole was arranged inthe outside ＂U＂ of the double ＂U＂, the horizontal distance between the hole position and return airway was 20 m and the height ofthe hole was 4 m. The on-site experimental data showed that gas concentration of upper comer was less than 0.5%.

关 键 词：采空区 瓦斯抽放 数值模拟 高位钻孔 钻孔参数 

分 类 号：TD712[矿业工程—矿井通风与安全]