煤与瓦斯突出解危措施合理性判别与优化  

Analysis of the mechanism for coal and gas outburst and measures for optimizing the risk relief

作　　者：荣海[1,2] 张宏伟[1,2] 朱志洁[1,2] 吕有厂 宋卫华[1,2] 贾策 RONG Hai;ZHANG Hong-wei;ZHU Zhi-jie;LYou-chang;SONG Wei-hua;JIA Ce(College of Mining,Liaoning Technical University,Fuxin 123000,Liaoning,China;Resarch Center of Coal Resources Safe Mining and Clean Utilization,Liaoning Technical University,Fuxin 123000,Liaoning,China;State Key Laboratory of Coking Coal Exploitation and Comprehensive Utilization,Pingdingshan 467000,Henan,China;Institute of Energy&Chemical Industry,China Pingmei Shenma Group,Pingdingshan 467000,Henan,China)

机构地区：[1]辽宁工程技术大学矿业学院,辽宁阜新123000 [2]辽宁工程技术大学煤炭资源安全开采与洁净利用工程研究中心,辽宁阜新123000 [3]炼焦煤资源开发及综合利用国家重点实验室,河南平顶山467000 [4]中国平煤神马集团能源化工研究院,河南平顶山467000

出　　处：《安全与环境学报》2020年第2期530-538,共9页Journal of Safety and Environment

基　　金：国家自然科学基金项目(51674135,51704148,51904145)。

摘　　要：为了优化瓦斯抽采解危措施,降低煤与瓦斯突出发生危险,以河南省某煤与瓦斯突出矿井为研究对象,应用FLAC3D数值模拟方法建立岩体应力与煤与瓦斯突出之间的内在联系,分析掘进对煤与瓦斯突出发生的影响。运用COMSOL Multiphysics软件对矿井原解危措施的合理性进行分析,并对解危方案进行优化,应用现场监测数据对优化后的解危效果进行验证。结果表明:巷道的掘进使煤岩体应力升高24%~25%,增大了煤与瓦斯突出发生的危险;原解危措施采取后,巷道煤体峰值瓦斯压力为0. 63~0. 64 MPa,大于河南省0. 6 MPa的规定指标,峰值瓦斯含量为7. 00~7. 12m^3/t,均大于河南省6 m^3/t的规定指标;采用优化后的解危措施后,峰值瓦斯压力与原始模拟方案相比下降了20. 31%~38. 1%,峰值瓦斯含量相较于原始模拟方案降幅达到31. 16%,达到了河南省煤与瓦斯突出防治的相关规定要求。The present paper is inclined to optimize the scheme of the gas drainage measures and reduce the risks of the coal and gas outbursta in the future by taking a coal and gas outburst coal mine in Henan as the research sample.For the said purpose,the paper has established the internal relationship between the rock mass stress and the coal and gas outburst mechanism through an analysis of the influence of tunneling on the coal and gas outburst via the FLAC3 Dnumerical simulation method.The paper has also analyzed the rationality of the original measures of the mining risk relief so as to optimize the scheme of the mine risk relief via the COMSOL Multiphysics software.And,finally,the paper has verified the effect of the optimized risk relief via the on-site monitoring data.The research results show that the tunneling engineer can increase the stress of the coal and rock mass by 24%-25%,thus aggregating the risk of the coal and gas outbursts.When the original measures to relieve the risk were taken,the peak gas pressure of the roadway coal can help to reduce to 0.63-0.64 MPa,which is higher than the stipulated index of 0.6 MPa according to the local demands of Henan Province,whereas the peak gas content remains at 7.00-7.12 m^3/t,which is also greater than the stipulated index of 6 m^3/t demanded in the province.And,furthermore,once the optimized measures to relieve the risk were taken,the peak gas pressure can be made to fall by20.31%-38.1%as compared with the original simulation scheme.And,then,the peak gas content has been made to drop to 31.16%as compared with the original simulation scheme while the peak gas pressure of the roadway coal has been made to lower than the stipulated index of 0.6 MPa required by the local authority,with the peak gas content being made also lower than the stipulated index of 6 m^3/t as is asked by the local authorities.Hence,it can be concluded that the measures to relieve the risk we have taken can be expected to meet the demands of the local authorities in prevention and control of th

关 键 词：安全工程 煤与瓦斯突出 数值模拟 解危措施 方案优化 效果验证 

分 类 号：X936[环境科学与工程—安全科学]