综放工作面采空区瓦斯抽采对氧化升温带影响  

Influence of gas extraction on oxidation zone in goaf for fully-mechanized top-coal caving face

作　　者：周西华[1,2] 李昂[1,2] 白刚[1,2] 宋东平[1,2] 

机构地区：[1]辽宁工程技术大学安全科学与工程学院,辽宁阜新123000 [2]矿山热动力灾害与防治教育部重点实验室,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2017年第9期897-902,共6页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金(51274115;51274113);辽宁省教育厅基金(L2012122)

摘　　要：为解决综放工作面回采期间瓦斯涌出量大、瓦斯抽采导致采空区漏风增加且易发生自然发火的问题,以红庙矿5-2S工作面自然发火和瓦斯抽采综合治理为例,采用现场实测和数值模拟相结合的方法,运用流体计算软件COMSOL对不同抽采量、不同抽采口位置时对氧化升温带影响规律进行研究.研究结果表明:采空区自燃"三带"数值模拟变化规律与现场监测数据相吻合;采空区瓦斯抽采量和抽采口所在位置与采空区自然发火危险性成正相关;5-2S工作面推进速度从3 m/d增加到3.2 m/d,瓦斯极限抽采量由31.71 m^3/h增加到120 m^3/h;距工作面切顶线10~20 m是采空区工作面最佳抽采位置.In order to solve the problems that gas emission quantity is large in fully mechanized caving coal face during extraction stage, and gas extraction caused air leakage which increases the risk of spontaneous combustion in goaf, this paper studied the comprehensive control of spontaneous combustion and gas drainage at working face 5-2S in Hongrniao coal mine by adopting the method of in-situ monitoring combined with numerical simulation. COMSOL software was used to study the influence laws of different extraction amount and different extraction location for oxidation zone. The results show that the change laws of numerical simulation for spontaneous combustion ＂three zones＂ in goaf are consistent with in-situ monitoring data. Gas extraction quantity and extraction location are positively correlated with spontaneous combustion risk in goal. The advancing speed of working face 5-2S increases from 3m/d to 3.28m/d, and the limit gas extraction quantity increases from 31.71m^3/h to 120 ma/h. The position with 10-20m from breaker line of working face is the best extraction position in goaf.

关 键 词：采空区 自燃 瓦斯抽采 氧化升温带 极限抽采量 

分 类 号：X936[环境科学与工程—安全科学] TD75[矿业工程—矿井通风与安全]