超长工作面采空区分段阻隔自燃防治研究  

Study on prevention and control of segmented blocking spontaneous combustion in goaf of super-long working face

作　　者：李尚国 Li Shangguo(China Coal Science and Industry Group Chongqing Research Institute Co.,Ltd.,Chongqing 400037,China)

机构地区：[1]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《煤炭与化工》2024年第11期121-124,共4页Coal and Chemical Industry

摘　　要：为有效解决超长工作面采空区遗煤自燃问题,本文探讨了中鸡煤矿20105工作面采空区采用分段阻隔自燃防治技术解决浮煤自燃的可能性,采用注浆方法在采空区平行于工作面方向形成注浆体,在进、回风侧靠近注浆体附近堆积沙土袋,通过注浆体和沙土袋在采空区形成隔离墙。结果表明,未采用分段阻隔自燃防治技术前,氧化带范围运输侧为68.49~198.31 m,回风侧为52.56~175.21 m。采用分段阻隔自燃防治技术后,氧化带宽度运输侧降低至分段阻隔前的41.5%,回风侧降低至分段阻隔前的43.8%,分段间距为45 m,可大幅降低采空区氧化带宽度,可有效抑制采空区浮煤自燃。In order to effectively solve the problem of spontaneous combustion of residual coal in the goaf of super-long working face,this paper discusses the possibility of solving the spontaneous combustion of floating coal in the goaf of 20105 working face of Zhongji Coal Mine by using the technology of segmented barrier spontaneous combustion prevention and control.The grouting body is formed in the goaf parallel to the working face by grouting method,and the sand bags are accumulated near the grouting body on the inlet and return air sides,and the isolation wall is formed in the goaf through the grouting body and the sand bags.The results show that the oxidation zone range of the transport side is 68.49~198.31 m,and the return air side is 52.56~175.21 m before the segmented barrier spontaneous combustion prevention and control technology is not adopted.After adopting the segmented barrier spontaneous combustion prevention and control technology,the width of the oxidation zone on the transport side is reduced to 41.5%of that before the segmented barrier,and the return air side is reduced to 43.8%of that before the segmented barrier.The segmented spacing is 45 m,which can greatly reduce the width of the oxidation zone in the goaf and effectively inhibit the spontaneous combustion of floating coal in the goaf.

关 键 词：超长工作面 采空区 分段阻隔 自燃防治 注浆 氧化带 

分 类 号：TD752[矿业工程—矿井通风与安全]