高位巷道瓦斯抽采诱导浮煤自燃影响效应  

Influential Effect on Spontaneous Combustion of Float Coal Induced by Gas Extraction in Upper Roadway

作　　者：褚廷湘[1,2] 刘春生 余明高 赵志军 徐全[4] 

机构地区：[1]河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地,河南焦作454003 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116 [3]义马煤业集团耿村煤矿,河南义马472431 [4]湖南省煤炭科学研究所,湖南长沙410000

出　　处：《采矿与安全工程学报》2012年第3期421-428,共8页Journal of Mining & Safety Engineering

基　　金：煤炭资源与安全开采国家重点实验室开放研究基金项目(10KF01);国家自然科学基金项目(50974055)

摘　　要：基于高瓦斯易自燃煤层高位巷道瓦斯抽采技术条件下,以研究煤自燃形成机理为切入点,依据义马煤业集团耿村矿13190工作面自然发火实际情况,通过理论分析,数学建模及现场辅助测试,对煤岩裂隙发育漏风通道模式、采空区浮煤碎胀特性、漏风动力源展开研究,发现巷道瓦斯抽采,增加了高瓦斯易自燃煤层的自燃风险,主要体现在:1)造成工作面、采空区及抽放巷道端口间存在漏风通道及动力;2)采动应力及抽采巷道松动圈造成采空区煤岩裂隙充分发育,采空区浮煤压实程度降低,浮煤碎胀性增加,有利于煤自燃蓄热;3)采空区浮煤一旦氧化,造成采空区高温点与漏风通道间存在温度梯度,从而形成的内生火风压,加剧采空区破裂浮煤的自燃进程,诱导采空区浮煤自燃发生。In this paper,based on the gas extraction technique of upper roadway in high gas and easily spontaneous combustion coal seam,taking the study of spontaneous combustion mechanism as point of penetration,according to the actual spontaneous combustion situation of LW13190 in Gengcun coal mine,Yima coal industry group,we have studied the strata fracture development,air leakage passage model,expansion property of float coal in goaf,and power source of air leakage,et al,by using theo-retical analysis,mathematical model and field aided test.The results show that the gas extraction in up-per roadway has increased the spontaneous combustion risk in the high gas and easily spontaneous combustion coal seam,,which mainly embodies in： 1） Air leakage passage and power are exist in the port between the coal face,goaf and upper drainage roadway;2） The coal-rock mass fractures are fully development duo to mining stress and loose circle of drainage roadway,while the compaction degree of float coal in goaf decreases,and the expansion property of float coal increases,which are beneficial to the spontaneous combustion and heat storing of coal mass;3） Once the float coal in goaf is oxidized,the temperature gradient will exit between the high temperature dot in goaf and air leakage passage.Then,the formed endogenous fire pressure will exacerbate the spontaneous process of broken float coal in goaf,and induce the spontaneous combustion of float coal.

关 键 词：瓦斯抽采 自燃 裂隙 漏风 蓄热 内生火风压 

分 类 号：TD72[矿业工程—矿井通风与安全]