摘要
对于不具备保护层开采条件的突出厚煤层,运用预抽煤层瓦斯这种区域防突措施进行瓦斯防突。当需要利用上分层或者上区段开采后形成的卸压作用保护下分层或下区段时,必须确定有效卸压保护范围。为测定东庞矿21222工作面2号煤层开采后形成的有效卸压保护范围,该矿制定了考察方案,通过施工顺层钻孔取煤样进行数据分析,考察相邻采空区外侧12、22、32 m处煤层瓦斯含量,煤体坚固性系数,间接计算煤层瓦斯压力。经过综合分析,2号煤层采空区外侧30 m范围内为有效卸压保护范围,卸压范围距巷帮宽度不得小于15 m。本文的研究对无保护层开采条件下突出厚煤层确定有效卸压保护范围有指导意义。
For outburst thick coal seams without protective layer mining conditions,the regional outburst prevention measures such as gas pre-drainage are used for gas outburst prevention.Effective pressure relief protection range is needed when pressure relief effect caused by upper layer or upper section used to protect the lower layer or the lower section.In order to determine the effective pressure relief protection range formed after the mining of No.2 coal seam,a survey plan was developed,and coal samples were taken through drilling along the construction for data analysis,the content,coal solidity coefficient,indirect calculation of coal seam gas pressure by 12、22、32 m outside of the goaf of No.2 coal seam were studied.After comprehensive analysis,the effective pressure relief protection range was within 30 m outside the goaf of No.2 coal mine coal seam,and the pressure relief range must not be less than 15 m from the width of the roadway.The research in this paper had certain guiding significance for determining the effective pressure relief protection range for the outburst thick coal seam without protective layer mining conditions.
作者
宋洋洋
Song Yangyang(Dongpang Mine,Jizhong Energy Corporation Ltd.,Xingtai 054201,China)
出处
《煤炭与化工》
CAS
2020年第3期95-97,共3页
Coal and Chemical Industry
关键词
顺层钻孔
突出煤层
卸压带
区域验证
无突出危险区
underground drilling
outburst coal seam
pressure relief zone
regional verification
no outburst danger zone
