倾斜厚煤层沿空掘巷窄煤柱合理宽度数值模拟研究
投稿时间:2019-04-16  修订日期:2020-08-04  点此下载全文
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作者单位E-mail
宁廷洲 兖矿新疆矿业有限公司硫磺沟煤矿 1532868511@qq.com 
李刚 西安科技大学  
赵鹏翔 西安科技大学  
林海飞 西安科技大学  
杨俊生 兖矿新疆矿业有限公司 硫磺沟煤矿  
李晓疆 新疆维吾尔自治区煤炭科学研究所  
贾永勇 新疆维吾尔自治区煤炭科学研究所  
基金项目:国家自然科学基金(51604219),新疆维吾尔自治区自然科学基金面上项目(2018D01A22),科技支疆项目(2018E02094),天山创新团队(2018D14003)
中文摘要:为了确定倾斜厚煤层沿空掘巷窄煤柱合理宽度,以兖矿新疆矿业新疆硫磺沟煤矿为研究对象,分析了该条件下沿空掘巷围岩应力分布以及变形特征,不同煤柱宽度垂直应力分布规律及对巷道变形的影响。结果表明:煤柱宽度大于4m时,煤柱内稳定区域增势比较明显,煤柱宽度的不断增大,煤柱内稳定核心承载区域不断增大;根据巷道掘进期间垂直应力大小,应力分布规律及围岩巷道稳定性分析确定煤柱合理宽度为4m;现场实测数据表明,沿空掘巷窄煤柱的宽度可以有效满足巷道围岩稳定性要求。
中文关键词:倾斜厚煤层  沿空掘巷  数值模拟  垂直应力分布  围岩变形
 
Numerical Simulation Study on Reasonable Width of Narrow Coal Pillars along Gob Road in Inclined Thick Coal Seam
Abstract:In order to determine the reasonable width of narrow coal pillars gob-side entry in inclined thick coal seams, the stress distribution and deformation characteristics of surrounding rock in the roadway gob-side entry in Xinjiang are analyzed. Width vertical stress distribution law and its influence on roadway deformation. The results show that when the coal pillar width is more than 4m, the stability of the stable area in the coal pillar is obvious, the width of the coal pillar increases continuously, and the stable core bearing area in the coal pillar increases continuously. According to the vertical stress during the tunneling, the stress distribution law And the stability analysis of the surrounding rock roadway determines that the reasonable width of the coal pillar is 4m; the field measured data shows that the width of the narrow coal pillar gob-side entry can effectively meet the stability requirements of the surrounding rock of the roadway.
keywords:inclined thick coal seam  gob-side entry  numerical simulation  vertical stress distribution  surrounding rock deformation
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