摘要
针对厚煤层分层开采过程中上分层采空区内的煤自燃危险区域难以判定的问题,提出以数值模拟为主、现场监测为辅的方法判定煤自燃危险区域.使用COMSOL Multiphysics求解上分层采空区煤自燃数学模型,依据氧化三带的划分标准划分煤自燃危险区域;再通过监测现场气体数据,验证模拟结果的准确性;最后以某煤矿3304(1)面采空区煤自燃防治为例,利用数值模拟及现场试验准确判定出煤自燃危险区,并采取防治措施及时根除煤自燃隐患.研究结果表明该方法可以为同类型煤自燃防治提供参考.
Aiming at the problem that it is difficult to determine the coal spontaneous combustion risk area in the upper layered goaf in the process of layered mining of thick coal seam,a method based on numerical simulation and supplemented by on-site monitoring is proposed to determine the coal spontaneous combustion risk area.COMSOL Multiphysics is used to solve the mathematical model of coal spontaneous combustion in upper stratified goaf,and then the dangerous area of coal spontaneous combustion is divided according to the coal spontaneous combustion oxidation zone.The accuracy of the simulation results is verified by monitoring the field gas data.Finally,this paper takes the prevention and control of coal spontaneous combustion in goaf of 3304(1)face of a coal mine as an example,and determines the coal spontaneous combustion risk area by numerical simulation and field test.It also takes prevention and control measures to eliminate the hidden danger of coal spontaneous combustion in time.The results show that this method can provide references for the prevention and control of spontaneous combustion of the same type of coal.
作者
吴芳华
施式亮
鲁义
于顺才
丁仰卫
WU Fanghua;SHI Shiliang;LU Yi;YU Shuncai;DING Yangwei(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Luwa Coal Mine,Shandong Lutai Holding Group Co.,Ltd.,Jining 272350,China)
出处
《矿业工程研究》
2023年第1期42-47,共6页
Mineral Engineering Research
基金
国家自然科学基金资助项目(51974120,52274196)。
关键词
分层开采
煤自燃危险区
数值模拟
防治技术
layered mining
coal spontaneous combustion danger zone
numerical simulation
prevention and control technology
