煤矿安全2024，Vol.55Issue(8)：88-96,9.DOI:10.13347/j.cnki.mkaq.20231537
残煤复采区巷道掘进凝胶堵漏防灭火技术研究
Research on gel plugging and fire prevention technology for roadway excavation in residual coal re-mining area
刘硕 1杨元伟 2牟海鹏 2郭廷稳 2李百宜 1李佳龙1
作者信息
- 1. 中国矿业大学 矿业工程学院,江苏 徐州 221000
- 2. 山东济宁运河煤矿有限责任公司,山东 济宁 272055
- 折叠
摘要
Abstract
The phenomenon of spontaneous combustion of coal left in the goaf directly affects the safe and efficient mining of coal mines,and the use of plugging materials to close the air leakage channel is an effective method to solve the problem of spontaneous combustion of coal in the goaf.Taking the F1301 re-mining face of Yunhe Coal Mine as the engineering background,aiming at the hidden danger of spontaneous combustion of loose coal left in the tunneling roadway in the goaf,the implementation scheme of gel plugging and fire extinguishing technology for loose coal was formulated.The COMSOL numerical simulation method was used to study the gel diffusion law under different injection time and pressures,and the engineering application was carried out.The results show that the injection time and pressure are proportional to the gel diffusion range.Considering the injection effect and cost,10 MPa and 140-160 min are selected as the best injection pressure and time,and the distance between the injection holes is set to 5 m.After the implementation of the gel plugging fire prevention and extinguishing scheme,the monitoring data of the observation bore-holes on both sides of the roadway show that the volume fraction of the iconic gas CO is stable below 24×10-6,and the gel plugging fire prevention and extinguishing effect is good,which effectively eliminates the hidden danger of spontaneous combustion of coal left in the goaf.关键词
残煤复采/防灭火/遗煤自燃/自然发火/凝胶堵漏Key words
residual coal re-mining/fire prevention and extinguishing/residual coal spontaneous combustion/spontaneous combus-tion/gel plugging分类
矿业与冶金引用本文复制引用
刘硕,杨元伟,牟海鹏,郭廷稳,李百宜,李佳龙..残煤复采区巷道掘进凝胶堵漏防灭火技术研究[J].煤矿安全,2024,55(8):88-96,9.
