高林,刘鹏泽,张盼栋,吴桂义,康向涛
GAO Lin,LIU Pengze,ZHANG Pandong,WU Guiyi,KANG Xiangtao

• 1:贵州大学矿业学院
• 2:中国矿业大学(北京)煤炭行业巷道支护与灾害防治工程研究中心
• 3:贵州大学喀斯特地区优势矿产资源高效利用国家地方联合工程实验室
• 4:贵州大学贵州省复杂地质矿山开采安全技术工程中心

摘要(Abstract)：

倾斜煤层沿空半煤岩巷由于围岩结构的非对称性和非均质性，受采掘扰动影响，巷道围岩呈现更严重的变形破坏。为揭示不同基本顶断裂形式对倾斜煤层沿空半煤岩巷围岩稳定性的影响规律，采用数值模拟方法针对该类巷道4种基本顶断裂形式下巷道围岩变形特征进行了研究。结果表明：基本顶断裂线位置对该类巷道围岩稳定性的影响程度由小到大依次为：采空区侧、煤柱上方、实体煤侧、巷道上方；基本顶断裂线位于采空区侧时，煤柱轴向、横向应力增速均小于其他情况，垂直位移也最小，煤柱变形在允许范围内，可保持后期对顶板的支承能力，对巷道维护最有利。在此基础上，以贵州某矿1511工作面回风巷为工程背景进行了工业试验，通过理论计算和现场钻孔探测综合分析得出，为避免基本顶断裂线位于煤柱上方靠巷道侧，下一步掘进时煤柱宽度应由3 m改为5 m。掘采期间断面检测结果显示，断面最大收缩率为23.3%，最大非对称变形率为5.2%，巷道整体均匀协调变形，进一步验证了研究成果的可靠性。
Due to the asymmetry and heterogeneity of surrounding rock structure, the surrounding rock of the gob-side coal-rock roadway in inclined coal seams presents more serious deformation and failure under the influence of driving and mining. To reveal the influence of different main roof fracture types on the stability of surrounding rock of the gobside coal-rock roadway in inclined coal seams, the deformation characteristics of surrounding rock under four main roof fracture types of this kind of roadway are studied by numerical simulation. The results show that the influence degree from highest to lowest of the position of the fracture line of main roof on the surrounding rock stability of this kind of roadway is as follows: goaf, coal pillar, coal wall, top of the roadway; when the fracture line of main roof is located at the goaf, the growth rate of axial and transverse stress of the coal pillar is less than that in other cases, the vertical displacement is also the smallest, and the coal pillar deformation is within the allowable range, which can maintain the support capacity of the roof in the later stage and is the most favorable for roadway maintenance. On the basis of this research, the industrial test is carried out with return air roadway of working face 1511 of a mine in Guizhou Province as the engineering background. Through theoretical calculation and comprehensive analysis of on-site borehole detection, it is concluded that for the purpose of avoiding the fracture line of main roof being above the coal pillar and close to the roadway, the coal pillar width should be changed from 3m to 5m in the next excavation. The test results of section during driving and mining show that the maximum shrinkage rate of section is 23.3%, the maximum asymmetric deformation rate, 5.2%, and the overall uniform and coordinated deformation of roadway further verifies the reliability of the research results.

关键词(KeyWords)： 围岩稳定性;半煤岩巷道;基本顶断裂位置;影响规律;沿空掘巷;煤柱宽度;倾斜煤层
surrounding rock stability;coal-rock roadway;fracture position of the main roof;influence law;gob-side roadway;pillar width;inclined coal seam

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(52004073);; 贵州省科技支撑计划项目(黔科合支撑[2021]一般400);; 贵州省科学技术基金项目(黔科合基础[2020]1Y216)

作者(Author): 高林,刘鹏泽,张盼栋,吴桂义,康向涛
GAO Lin,LIU Pengze,ZHANG Pandong,WU Guiyi,KANG Xiangtao

参考文献(References)：

• [1]奚家米，毛久海，杨更社，等.回采巷道合理煤柱宽度确定方法研究与应用[J].采矿与安全工程学报，2008,25(4):400-403.XI Jiami, MAO Jiuhai, YANG Gengshe, et al. Method for determining rational pillar width in mining roadway along goaf[J].Journal of Mining&Safety Engineering,2008,25(4):400-403.
• [2]刘增辉，高谦，华心祝，等.沿空掘巷围岩控制的时效特征[J].采矿与安全工程学报，2009,26(4):465-469.LIU Zenghui,GAO Qian,HUA Xinzhu,et al. Aging characteristics of wall rock control in roadway driving along goaf[J].Journal of Mining&Safety Engineering,2009,26(4):465-469.
• [3]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, 31(5):921-927.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]. Chinese Journal of Rock Mechanics and Engineering,2012,31(5):921-927.
• [4]侯朝炯，李学华.综放沿空掘巷围岩大、小结构的稳定性原理[J].煤炭学报，2001,26(1):1-7.HOU Chaojiong,LI Xuehua. Stability principle of big and small structures of rock surrounding roadway driven along goaf in fully mechanized top coal caving face[J]. Journal of China Coal Society,2001,26(1):1-7.
• [5]贾光胜，康立军.综放开采采准巷道护巷煤柱稳定性研究[J].煤炭学报，2002,27(1):6-10.JIA Guangsheng,KANG Lijun. Study on the chain pillar stability of the developing entry in longwall top–coal mining[J]. Journal of China Coal Society,2002,27(1):6-10.
• [6]屠世浩，白庆升，屠洪盛.浅埋煤层综采面护巷煤柱尺寸和布置方案优化[J].采矿与安全工程学报，2011,28(4):505-510.TU Shihao,BAI Qingsheng,TU Hongsheng. Pillar size determination and panel layout optimization for fully mechanized faces in shallow seams[J]. Journal of Mining&Safety Engineering,2011,28(4):505-510.
• [7]张广超，何富连.大断面强采动综放煤巷顶板非对称破坏机制与控制对策[J].岩石力学与工程学报，2016,35(4):806-818.ZHANG Guangchao,HE Fulian. Asymmetric failure and control measures of large cross-section entry roof with strong mining disturbance and fully-mechanized caving mining[J]. Chinese Journal of Rock Mechanics and Engineering, 2016, 35(4):806-818.
• [8]殷帅峰，程根银，何富连，等.基于基本顶断裂位置的综放窄煤柱煤巷非对称支护技术研究[J].岩石力学与工程学报，2016,35(增刊1):3162-3174.YIN Shuaifeng,CHENG Genyin,HE Fulian,et al. An asymmetric support technique for fully–mechanized coal roadway nearby narrow pillar based on the fracture position analysis in basic roof[J]. Chinese Journal of Rock Mechanics and Engineering,2016,35(Sup.1):3162-3174.
• [9]凌涛.基本顶破断位置对煤柱稳定性影响及沿空掘巷支护研究[D].湘潭：湖南科技大学，2015.LING Tao. The impact studies of fracture structure on the coal pillar stability and supporting of roadway driving along next goaf[D]. Xiangtan:Hunan University of Science and Technology,2015.
• [10]王红胜，张东升，李树刚，等.基于基本顶关键岩块B断裂线位置的窄煤柱合理宽度的确定[J].采矿与安全工程学报，2014,31(1):10-16.WANG Hongsheng,ZHANG Dongsheng,LI Shugang,et al. Rational width of narrow coal pillar based on the fracture line location of key rock B in main roof[J]. Journal of Mining&Safety Engineering,2014,31(1):10-16.
• [11]查文华，李雪，华心祝，等.基本顶断裂位置对窄煤柱护巷的影响及应用[J].煤炭学报，2014,39(增刊2):332-338.ZHA Wenhua,LI Xue,HUA Xinzhu,et al. Impact and application on narrow coal pillar for roadway protecting from fracture position of upper roof[J]. Journal of China Coal Society,2014,39(Sup.2):332-338.
• [12]钱鸣高，缪协兴，何富连.采场“砌体梁”结构的关键块分析[J].煤炭学报，1994,19(6):557-563.QIAN Minggao, MIAO Xiexing, HE Fulian. Analysis of key block in the structure of voussoir beam in longwall mining[J].Journal of China Coal Society,1994,19(6):557-563.
• [13]钱鸣高，许家林.煤炭开采与岩层运动[J].煤炭学报，2019,44(4):973-984.QIAN Minggao,XU Jialin. Behaviors of strata movement in coal mining[J]. Journal of China Coal Society,2019,44(4):973-984.
• [14]缪协兴，钱鸣高.采场围岩整体结构与砌体梁力学模型[J].矿山压力与顶板管理，1995,12(增刊1):3-12.MIAO Xiexing, QIAN Minggao. Solid structure and model of voussior beam of face surrounding rock[J]. Ground Pressure and Strata Control,1995,12(Sup.1):3-12.
• [15]郭金刚，王伟光，何富连，等.大断面综放沿空巷道基本顶破断结构与围岩稳定性分析[J].采矿与安全工程学报，2019,36(3):446-454.GUO Jingang, WANG Weiguang, HE Fulian, et al. Main roof break structure and surrounding stability analysis in gob-side entry with fully-mechanized caving mining[J]. Journal of Mining&Safety Engineering,2019,36(3):446-454.
• [16]张广超.综放松软窄煤柱沿空巷道顶板不对称破坏机制与调控系统[D].北京：中国矿业大学(北京)，2017.ZHANG Guangchao. Asymmetric failure mechanism and regulation system of gob–side entry roof with fully-mechanized caving mining and a loose and weak coal pillar[D]. Beijing:China University of Mining and Technology(Beijing),2017.
• [17]高林.缓倾斜煤层沿空半煤岩巷非对称变形破坏机理及控制技术[D].北京：中国矿业大学(北京)，2020.GAO Lin. Asymmetric deformation characteristics and failure mechanism of the gob-side coal-rock roadway and its control techniques in gently inclined coal seam[D]. Beijing:China University of Mining and Technology(Beijing),2020.

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