近距离突出煤层群瓦斯治理技术优化的研究  

Optimization of Gas Control Technology in Contiguous Outburst Coal Seams

作　　者：刘雪莉[1] 游继军 LIU Xueli;YOU Jijun(School of Civil and Environmental Engineering,Anhui Xinhua University,Hefei 230031,China;Huai Mine West Mine Investment Management Co.,Ltd,Ordos 017000,China)

机构地区：[1]安徽新华学院土木与环境工程学院,安徽合肥230031 [2]淮矿西部煤矿投资管理有限公司,内蒙古鄂尔多斯017000

出　　处：《武汉工程大学学报》2021年第1期86-90,共5页Journal of Wuhan Institute of Technology

基　　金：安徽省教育厅高校自然科学研究项目(KJ2018A0593);安徽新华学院校级科研重点项目基金(kytd201910);安徽省质量工程一般项目基金(2019jyxm0503);安徽新华学院校级研究所安全与环境评价项目基金(yjs201703)。

摘　　要：近距离突出煤层群工作面受上下邻近煤层卸压瓦斯的影响,致使回采工作面瓦斯涌出量大、工作面回风隅角及回风巷中的甲烷传感器频繁报警,瓦斯治理消耗大量的人力、物力和时间,严重制约了矿井的安全生产。通过对几种瓦斯治理方案进行分析论证,得出将整个煤层群作为一个治理单元,统筹考虑,将煤层厚度、瓦斯含量相对较小的弱突出煤层作为关键保护层,配合打钻进行立体式抽采,实现上下递进保护,最大限度地抽采邻近煤层的卸压瓦斯的方案。现场实践结果表明,保护层工作面在回采期间瓦斯抽采率高达90%以上,回风隅角瓦斯浓度降至0.6%以下,回风巷风流中瓦斯浓度降至0.2%以下,工作面月平均回采长度由原来的120 m提高至200 m。同时,从根本上解决了被保护层工作面回采期间瓦斯带来的安全威胁。A scheme for drainage gas from contiguous coal seams to maximize pressure relief was found in this study,through analysis and demonstration of several gas control schemes.We took the whole coal seam group as a control unit and regarded the weak outburst coal seam with relatively small thickness and low gas content as the key protective seam.Meanwhile,the three-dimensional borehole drainage was carried out to realize progressive protection.The field practice results show that the gas drainage rate of working face of protective seam reaches over 90%;the gas concentration in the return air corner falls to below 0.6%;the maximum gas concentration in the return air flow is down to less than 0.2%;and the average monthly mining length of working face increases from 120 m to 200 m.Finally,the scheme fundamentally solves the gasinduced safety threats during the recovery of working face of protected seam.

关 键 词：近距离突出煤层群 保护层 穿层钻孔 立体式抽采 卸压瓦斯 瓦斯治理 

分 类 号：TD712[矿业工程—矿井通风与安全]