西部矿区沿空掘巷无冲击窄煤柱研究
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摘要
为解决西部矿区采深增加带来的20~40 m区段煤柱防冲控制难等问题,提出了临界煤柱尺寸的设计方向,以彬长矿区高家堡煤矿为例开展了沿空掘巷无冲击窄煤柱的设计原则研究。通过有限元数值模拟分析了巷道开掘前后的应力分布环境,确定了无冲击窄煤柱的尺寸范围。针对5、6、7、8 m四个不同煤柱宽度参数,开展了基于围岩应力状态、围岩变形和安全性能的的综合对比分析,结合工程类比、理论分析,最终确定了合理的煤柱参数取值范围。选取8 m煤柱,开展了巷道开掘后的围岩应力二次分布规律研究,确定了围岩表面位移的临界参数,并在受冲击威胁的综放工作面回风巷内进行了8 m煤柱的工业试验,试验结果验证了设计的合理性。
In order to solve the difficult problem of coal pillar impact control caused by the increase of mining depth in western mining area,this paper presents a design method of using coal pillar width to realize the 20 ~ 40 m of driving along goaf.This paper takes Gaojiabao Coal Mine of Binchang Mining Area as example to carry out the design principle research of the no-impact narrow coal pillar along the goaf.The stress distribution environment before and after roadway excavation was analyzed by finite element numerical simulation,and the size range of the no-impact narrow coal pillar was determined.According to the parameters of four different width coal pillars of 5,6,7,8 m,the stress state of the surrounding rock and the technical research of the coal pillar plastic compression zone are carried out,and the comprehensive comparison scheme for the safety of coal pillars,such as stress,deformation,support and disaster prevention is developed.Finally,combined with engineering analogy and theoretical analysis,the reasonable range of coal pillar parameters is determined. Considering the safety requirement of fire and waterproof,8 m coal pillar is selected,the paper studies the second time distribution law of surrounding rock stress after excavation,determines the critical parameters of the surface displacement of surrounding rock. The industrial test of 8 m coal pillar is carried out and the test results verified the rationality of the design.
In order to solve the difficult problem of coal pillar impact control caused by the increase of mining depth in western mining area,this paper presents a design method of using coal pillar width to realize the 20 ~ 40 m of driving along goaf.This paper takes Gaojiabao Coal Mine of Binchang Mining Area as example to carry out the design principle research of the no-impact narrow coal pillar along the goaf.The stress distribution environment before and after roadway excavation was analyzed by finite element numerical simulation,and the size range of the no-impact narrow coal pillar was determined.According to the parameters of four different width coal pillars of 5,6,7,8 m,the stress state of the surrounding rock and the technical research of the coal pillar plastic compression zone are carried out,and the comprehensive comparison scheme for the safety of coal pillars,such as stress,deformation,support and disaster prevention is developed.Finally,combined with engineering analogy and theoretical analysis,the reasonable range of coal pillar parameters is determined. Considering the safety requirement of fire and waterproof,8 m coal pillar is selected,the paper studies the second time distribution law of surrounding rock stress after excavation,determines the critical parameters of the surface displacement of surrounding rock. The industrial test of 8 m coal pillar is carried out and the test results verified the rationality of the design.
引文
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[8]朱晓峻.带状充填开采岩层移动机理研究[D].徐州:中国矿业大学,2016.
[9]王炯,郝育喜,郭志飚,等.亭南煤矿东翼轨道大巷底鼓力学机制及控制技术[J].采矿与安全工程学报,2015,32(2):291-297.WANG Jiong,HAO Yuxi,GUO Zhibiao,et al.Floor heave mechanism and control technology for east rail roadway of Tingnan coal mine[J].Journal of Mining&Safety Engineering,2015,32(2):291-297.
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[11]王其胜,李夕兵,李地元.深井软岩巷道围岩变形特征及支护参数的确定[J].煤炭学报,2008,33(4):364-367.WANG Qisheng,LI Xibing,LI Diyuan.Surrounding rock deformation properties and determ ination of support parameters of soft rock roadway in deep mine[J].Journal of China Coal Society,2008,33(4):364-367.
[12]毛勇奋,屈英.华亭煤矿强冲击倾向煤巷掘进期间矿压防治技术[J].煤矿安全,2015,46(4):73-76.MAO Yongfen,QU Ying.Mine stress prevention and control technology for coal roadway excavation with strong impact tendency in Huating coal mine[J].Safety in Coal Mines,2015,46(4):73-76.
[13]曾正良.巷道变形破坏的因素及控制方法[J].煤炭技术,2008,27(4):141-143.ZENG Zhengliang.Foadway on Factors of Laneways Distorted and Control Methods Reasonable[J].Coal Technology,2008,27(4):141-143.
[14]张朋,王一,刘盛东,等.工作面底板变形与破坏电阻率特征[J].煤田地质与勘探,2011,39(1):64-66.ZHANG Peng,WANG Yi,LIU Shengdong,et al.Resistivity characteristic of deformation and failure of floor in workface[J].Coal gerlogy&Exploration,2011,39(1):64-66.
[15]孟召平,张贝贝,谢晓彤,等.基于岩性–结构的煤层底板突水危险性评价[J].煤田地质与勘探,2011,39(5):35-40.MENG Zhaoping,ZHANG Beibei,XIE Xiaotong,et al.Evaltation of water inrush risk of seam floor based on lithology-structure[J].Coal Geology&Exploration,2011,39(5):35-40.
[16]孟召平,王保玉,徐良伟,等.煤炭开采对煤层底板变形破坏及渗透性的影响[J].煤田地质与勘探,2012,40(2):39-43.MENG Zhaoping,WANG Baoyu,XU Liangwei,et al.Influence of coal mining on the deformation-failure and permeability of seam floor[J].Coal Geology&Exploration,2012,40(2):39-43.
[17]李刚,王海平,苏俊辉.采动影响下的煤层底板岩层破坏特征[J].煤田地质与勘探,2012,40(2):59-61.LI Gang,WANG Haiping,SU Junhui.Destuction features in floor caused by mining activity[J].Coal Geology&Exploration,2012,40(2):59-61.
[18]钱鸣高.20年来采场围岩控制理论与实践的回顾[J].中国矿业大学学报,2000,29(1):1-4.QIAN Minggao.Review on the theory and practice of surrounding rock control in stope since.20,[J].Journal of China University of Mining and Technology,2000,29(1):1-4.
[19]刘金海,姜福兴,王乃国,等.深井特厚煤层综放工作面区段煤柱合理宽度研究[J].岩石力学与工程学报,2012,33(5):58-60.LIU Jinhai,JIANG Fuxing,WANG Naiguo,et al.Research on reasonable width of segment pillar of fully mechanized caving face in extra-thick coal seam of deep shaft[J].hinese Journal of Rock Mechanics and Engineering,2012(5):58-60.
[20]王凯,张振南,秦爱芳.考虑微观莫尔-库仑准则的拓展虚内键本构模型[J].岩土工程学报,2014,26(5):880-885.WANG Kai,ZHANG Zhennan,QIN Aifang.Augmented virtual internal bond considering micro mohr-coulomb criterion[J].Chinese Journal of Geotechnical Engineering,2014,26(5):880-885.
[2]来兴平,伍永平,任奋华,等.西部矿区深部复杂应力环境下开采扰动区松软岩层力学特性[J].北京科技大学学报,2006,28(4):312-316.LAI Xingping,WU Yongping,REN Fenhua,et al.Mechanical characteristics of soft-rock at excavation disturbed zone in the complex stress environment of deep mining in the western coal mine region of China[J].Journal of University of Science and Technology Beijing,2006,28(4):312-316.
[3]蔡克海,刘会彬,安俊孝.彬长矿区软底巷道变形特征及治理方案[J].煤矿开采,2013,18(5):60-62.CAI Kehai,LIU Huibin,AN Junxiao.Deformation Characteristic of roadway with soft floor and prevention in Binchang Mining area[J].Coal Mining Technology,2013,18(5):60-62.
[4]刘健,刘泽功,高魁.巨厚煤层高位钻孔抽采综放工作面上覆岩层瓦斯试验研究[J].安全与环境学报,2013,13(3):218-222.LIU Jian,LIU Zegong,GAO Kui.Experimental study on gas extraction from overlying strata in fully mechanized top coal caving face with high level boreholes in thick coal seam[J].Journal of Safety and Environment,2013,13(3):218-222.
[5]刘会彬.彬长矿区软底巷道变形特征及影响因素分析[J].煤田地质与勘探,2013,41(6):58-60.LIU Huibin.Soft floor deformation character istics and analysis of influential factors in Binchang mining area[J].Coal Geology&Exploration,2013,41(6):58-60.
[6]韩海潮,解兴智,富强,等.下沟煤矿综放工作面煤体支承压力分布规律研究[J].煤矿开采,2004,9(1):29-33.HAN Haichao,XIE Xingzhi,FU Qiang,et al.Study on the law of abutment stress distribution in longwall with top-coal caving face of Xiagou coal mine[J].Coal Mining Technology,2004,9(1):29-33.
[7]彭赐灯.矿山压力与岩层控制研究热点最新进展评述[J].中国矿业大学学报,2015,44(1):1-8.SYD S PENG.Topical areas of research needs in ground control:a state of the art review on coal mine ground control[J].Journal of China University of Mining&Technology,2015,44(1):1-8.
[8]朱晓峻.带状充填开采岩层移动机理研究[D].徐州:中国矿业大学,2016.
[9]王炯,郝育喜,郭志飚,等.亭南煤矿东翼轨道大巷底鼓力学机制及控制技术[J].采矿与安全工程学报,2015,32(2):291-297.WANG Jiong,HAO Yuxi,GUO Zhibiao,et al.Floor heave mechanism and control technology for east rail roadway of Tingnan coal mine[J].Journal of Mining&Safety Engineering,2015,32(2):291-297.
[10]郑赞赞.胡家河矿深埋采区巷道围岩破坏机理及其支护技术[D].西安:西安科技大学,2014:19-37.
[11]王其胜,李夕兵,李地元.深井软岩巷道围岩变形特征及支护参数的确定[J].煤炭学报,2008,33(4):364-367.WANG Qisheng,LI Xibing,LI Diyuan.Surrounding rock deformation properties and determ ination of support parameters of soft rock roadway in deep mine[J].Journal of China Coal Society,2008,33(4):364-367.
[12]毛勇奋,屈英.华亭煤矿强冲击倾向煤巷掘进期间矿压防治技术[J].煤矿安全,2015,46(4):73-76.MAO Yongfen,QU Ying.Mine stress prevention and control technology for coal roadway excavation with strong impact tendency in Huating coal mine[J].Safety in Coal Mines,2015,46(4):73-76.
[13]曾正良.巷道变形破坏的因素及控制方法[J].煤炭技术,2008,27(4):141-143.ZENG Zhengliang.Foadway on Factors of Laneways Distorted and Control Methods Reasonable[J].Coal Technology,2008,27(4):141-143.
[14]张朋,王一,刘盛东,等.工作面底板变形与破坏电阻率特征[J].煤田地质与勘探,2011,39(1):64-66.ZHANG Peng,WANG Yi,LIU Shengdong,et al.Resistivity characteristic of deformation and failure of floor in workface[J].Coal gerlogy&Exploration,2011,39(1):64-66.
[15]孟召平,张贝贝,谢晓彤,等.基于岩性–结构的煤层底板突水危险性评价[J].煤田地质与勘探,2011,39(5):35-40.MENG Zhaoping,ZHANG Beibei,XIE Xiaotong,et al.Evaltation of water inrush risk of seam floor based on lithology-structure[J].Coal Geology&Exploration,2011,39(5):35-40.
[16]孟召平,王保玉,徐良伟,等.煤炭开采对煤层底板变形破坏及渗透性的影响[J].煤田地质与勘探,2012,40(2):39-43.MENG Zhaoping,WANG Baoyu,XU Liangwei,et al.Influence of coal mining on the deformation-failure and permeability of seam floor[J].Coal Geology&Exploration,2012,40(2):39-43.
[17]李刚,王海平,苏俊辉.采动影响下的煤层底板岩层破坏特征[J].煤田地质与勘探,2012,40(2):59-61.LI Gang,WANG Haiping,SU Junhui.Destuction features in floor caused by mining activity[J].Coal Geology&Exploration,2012,40(2):59-61.
[18]钱鸣高.20年来采场围岩控制理论与实践的回顾[J].中国矿业大学学报,2000,29(1):1-4.QIAN Minggao.Review on the theory and practice of surrounding rock control in stope since.20,[J].Journal of China University of Mining and Technology,2000,29(1):1-4.
[19]刘金海,姜福兴,王乃国,等.深井特厚煤层综放工作面区段煤柱合理宽度研究[J].岩石力学与工程学报,2012,33(5):58-60.LIU Jinhai,JIANG Fuxing,WANG Naiguo,et al.Research on reasonable width of segment pillar of fully mechanized caving face in extra-thick coal seam of deep shaft[J].hinese Journal of Rock Mechanics and Engineering,2012(5):58-60.
[20]王凯,张振南,秦爱芳.考虑微观莫尔-库仑准则的拓展虚内键本构模型[J].岩土工程学报,2014,26(5):880-885.WANG Kai,ZHANG Zhennan,QIN Aifang.Augmented virtual internal bond considering micro mohr-coulomb criterion[J].Chinese Journal of Geotechnical Engineering,2014,26(5):880-885.