College of Resource and Environmental Engineering, Lanzhou Petrochemical Polytechnic University, Lanzhou 730207,China
Jingyuan Coal Group Weijiadi Mine

魏家地矿北1103工作面在回采过程中，采空区瓦斯会大量涌入工作面造成上隅角和回风巷瓦斯超限。为治理采空区瓦斯，计算钻孔参数并设计布置方案，在北1103工作面回风巷先后开掘1号、2号钻场，利用高位瓦斯钻孔接续进行瓦斯抽采作业并监测分析上隅角及回风巷瓦斯变化情况。治理结果显示，1号钻场抽采期间，工作面上隅角平均瓦斯浓度为0.48%，回风巷平均瓦斯浓度为0.25%；2号钻场抽采期间，工作面上隅角平均瓦斯浓度为0.37%，回风巷瓦斯浓度为0.22%；平均瓦斯浓度均在0.5%以下，未发生瓦斯超限现象，瓦斯抽采效果显著，治理方法与设计可为相关工程项目提供参考。

During the mining process of the north 1103 working face of Weijiadi Coal Mine, the gas in the goaf will flood into the working face in large quantities, causing the gas in the upper corner and the return airway to exceed the limit. In order to control the gas in the goaf, the drilling parameters were calculated and the layout scheme was designed. The No.1 and No.2 drilling fields were successively excavated in the return air roadway of the north 1103 working face, and the high-level gas drilling was used to carry out the gas drainage operation and monitor and analyze the gas changes in the upper corner and the return air roadway. The results show that during the extraction of No.1 drilling field, the average gas concentration in the upper corner of the working face is 0.48 %, and the average gas concentration in the return airway is 0.25 %. During the extraction of No.2 drilling field, the average gas concentration in the upper corner of the working face is 0.37 %, and the gas concentration in the return airway is 0.22 %. The average gas concentration is below 0.5 %, and there is no gas overrun. The gas extraction effect is remarkable. The treatment method and design can provide reference for related engineering projects.

陈德山1，张建江2,杨婉欣1. 采空区高位瓦斯抽采技术应用研究[J]. 煤炭与化工, 2023, 46(10): 141-146.

Chen Deshan 1, Zhang Jianjiang 2, Yang Wanxin 1 . Application research on high gas extraction technology in goaf . CCI, 2023, 46(10): 141-146.