地面钻井抽采对采空区自燃危险区域影响研究  

Study on the Influence of Surface Drilling Extraction on Spontaneous Combustion Dangerous Area in Goaf

作　　者：杨凯[1,2] 刘健 YANG Kai;LIU Jian(School of Safety Science and Engineering,Anhui University of Science and Technology,Huainan,Anhui 23200l,China;Key Laboratory of Safe and Effective Coal Mining of Ministry of Education,Anhui University of Science and Technology,Huainan,Anhui 23200l,China)

机构地区：[1]安徽理工大学安全科学与工程学院,安徽淮南市232001 [2]安徽理工大学煤矿安全高效开采省部共建教育部重点实验室,安徽淮南市232001

出　　处：《矿业研究与开发》2024年第5期92-97,共6页Mining Research and Development

基　　金：国家重点研发计划项目(2021YFC28000900);安徽省高校协同创新项目(GXXT-2020-057)。

摘　　要：为研究地面钻井抽采对采空区煤自燃危险区域的影响,以某矿综采工作面为研究背景,现场利用束管监测系统和SF6示踪气体,测定了采空区遗煤自燃危险区域和采空区漏风情况,并通过数值模拟研究了有无地面钻井情况下采空区自燃危险区域分布和地面钻井不同抽采量对采空区氧气浓度分布的影响。研究结果表明,采空区氧化带最大宽度为72.2 m,计算得出每日最小推进度为1.08 m;通过示踪气体测定风巷测点与地面钻井测点SF6最大浓度之比为8∶1。数值模拟结果显示,地面钻井抽采使得采空区自燃危险区域范围增加,并且随着抽采量的增加,自燃危险区域随之扩大。In order to study the influence of surface drilling extraction on the dangerous area of coal spontaneous combustion in goaf,taking the fully mechanized mining face of a mine as the research background,the beam tube monitoring system and SF_6 tracer gas were used to measure the spontaneous combustion dangerous area of residual coal in goaf and the air leakage in goaf.The distribution of spontaneous combustion dangerous area in goaf with or without surface drilling and the influences of different extraction amounts of surface drilling on the distribution of oxygen ancentration in goal were studied by numerical simulation.The results show that the maximum width of the oxidation zone in the goaf is 72.2 m,and the minimum daily propulsion degree is 1.08 m.The ratio of the maximum concentration of SF_6 measured by tracer gas between the wind tunnel measuring point and the ground drilling measuring point is 8∶1.The numerical simulation results show that the extraction of ground drilling is conductive to increasing the range of spontaneous combustion dangerous area in goaf,and the spontaneous combustion dangerous area expands with the increase of extraction amount.

关 键 词：地面钻井 瓦斯抽采 自燃危险区域 数值模拟 

分 类 号：TD752.2[矿业工程—矿井通风与安全]