深井特厚煤层综放工作面区段煤柱合理宽度研究
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摘要
留设合理宽度的区段煤柱是确保深井特厚煤层综放工作面顺利接续和安全回采的关键。以新巨龙矿井一采区区段煤柱宽度的确定为工程背景,首先采用微地震监测、应力动态监测和理论计算等方法确定深井特厚煤层综放工作面侧向支承压力分布特征,得出低应力区宽度约为20 m;其次,采用工程类比、数值模拟等方法确定深井特厚煤层综放工作面侧向煤体不完整区宽度约为3 m;最后,综合考虑资源回收、冲击地压防治、次生灾害控制和巷道支护等因素,确定深井特厚煤层综放工作面区段煤柱合理宽度为5.0～7.2 m。应用沿空巷道表面位移观测结果验证区段煤柱宽度的合理性。该研究结果对类似开采条件下的区段煤柱宽度确定具有参考意义。
Setting reasonable segment pillar is key for ensuring successful replacement and safety production of fully mechanized caving face in extra-thick coal seam of deep shaft.Taking the determination of segment pillar width in the first mining area of Xinjulong mine as the engineering background,firstly,the side abutment pressure distribution of fully mechanized caving face in extra-thick coal seam of deep shaft was studied by using microseismic monitoring,stress monitoring and theoretical calculation,and 20 m in width of low stress zone was realized.Secondly,the width of fractured zone in side coal mass of fully mechanized caving face in extra-thick coal seam of deep shaft was determined by using engineering analogy and numerical modelling,and about 3 m in width of fractured zone was found.Finally,various elements such as resources recovery,rockburst prevention and control,secondary disaster control and roadway support were considered comprehensively,and the reasonable width of segment pillar of fully mechanized caving face in extra-thick coal seam of deep shaft was determined as 5.0–7.2 m.Furthermore,the reasonableness of the segment pillar width was verified by using observation results of surface displacement of the gob-side entry.The results can provide a reference for segment pillar setting in other mines having similar mining conditions.
Setting reasonable segment pillar is key for ensuring successful replacement and safety production of fully mechanized caving face in extra-thick coal seam of deep shaft.Taking the determination of segment pillar width in the first mining area of Xinjulong mine as the engineering background,firstly,the side abutment pressure distribution of fully mechanized caving face in extra-thick coal seam of deep shaft was studied by using microseismic monitoring,stress monitoring and theoretical calculation,and 20 m in width of low stress zone was realized.Secondly,the width of fractured zone in side coal mass of fully mechanized caving face in extra-thick coal seam of deep shaft was determined by using engineering analogy and numerical modelling,and about 3 m in width of fractured zone was found.Finally,various elements such as resources recovery,rockburst prevention and control,secondary disaster control and roadway support were considered comprehensively,and the reasonable width of segment pillar of fully mechanized caving face in extra-thick coal seam of deep shaft was determined as 5.0–7.2 m.Furthermore,the reasonableness of the segment pillar width was verified by using observation results of surface displacement of the gob-side entry.The results can provide a reference for segment pillar setting in other mines having similar mining conditions.
引文
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[7]申志平.沿空掘巷煤柱宽度与支护参数的研究与应用[J].煤炭科学技术,2010,38(7):31-34.(SHEN Zhiping.Research andapplication of coal pillar width and support parameters for minegateway driving along goaf[J].Coal Science and Technology,2010,38(7):31-34.(in Chinese))
[8]张开智,夏均民,蒋金泉.钻孔煤粉量变化规律在区段煤柱合理参数确定中的应用[J].岩石力学与工程学报,2004,23(8):1307-1 310.(ZHANG Kaizhi,XIA Junmin,JIANG Jinquan.Variation law ofquantity of coal dust in drill hole and its application to determinationof reasonable width of coal pillars[J].Chinese Journal of RockMechanics and Engineering,2004,23(8):1 307-1 310.(in Chinese))
[9]谢广祥,杨科,刘全明.综放面倾向煤柱支承压力分布规律研究[J].岩石力学与工程学报,2006,25(3):545-549.(XIEGuangxiang,YANG Ke,LIU Quanming.Study on distribution laws of stress ininclined coal pillar for fully-mechanized top-coal caving face[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(3):545-549.(in Chinese))
[10]孟金锁.综放开采“原位”沿空掘巷探讨[J].岩石力学与工程学报,1999,18(2):205-208.(MENG Jinsuo.Study on driving gate road on“original site”in fully mechanized top coal caving mining[J].Chinese Journal of Rock Mechanics and Engineering,1999,18(2):205-208.(in Chinese))
[11]柏建彪,侯朝炯,黄汉富.沿空掘巷窄煤柱稳定性数值模拟研究[J].岩石力学与工程学报,2004,23(20):3475-3479.(BAI Jianbiao,HOU Chaojiong,HUANG Hanfu.Numerical simulation study onstability of narrow coal pillar of roadway driving along goaf[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(20):3 475-3 479.(in Chinese))
[12]曲效成,姜福兴,于正兴,等.基于当量钻屑法的冲击地压监测预警技术研究及应用[J].岩石力学与工程学报,2011,30(11):2346-2 351.(QU Xiaocheng,JIANG Fuxing,YU Zhengxing,et al.Rockburst monitoring and precaution technology based on equivalentdrilling research and its applications[J].Chinese Journal of RockMechanics and Engineering,2011,30(11):2 346-2 351.(in Chinese))
[2]刘增辉,康天合.综放煤巷合理煤柱尺寸的物理模拟研究[J].矿山压力与顶板管理,2005,22(1):24-26.(LIU Zenghui,KANG Tianhe.Numerical simulation of pillar proper dimension in the entry ofmechanized top coal caving face[J].Ground Pressure and StrataControl,2005,22(1):24-26.(in Chinese))
[3]张开智,韩承强,李大勇,等.大小护巷煤柱巷道采动变形与小煤柱破坏演化规律[J].山东科技大学学报:自然科学版,2006,25(4):6-9.(ZHANG Kaizhi,HAN Chengqiang,LI Dayong,et al.Miningdeformation of roadways and failure evolvement of small coal pillarunder different widths of chain pillars[J].Journal of ShandongUniversity of Science and Technology:Natural Science,2006,25(4):6-9.(in Chinese))
[4]马立强,张东升,王红胜,等.厚煤层巷内预置充填带无煤柱开采技术[J].岩石力学与工程学报,2010,29(4):674-680.(MALiqiang,ZHANG Dongsheng,WANG Hongsheng,et al.Miningtechnique with preset packing body in roadway for thick coal seamwithout coal pillars[J].Chinese Journal of Rock Mechanics andEngineering,2010,29(4):674-680.(in Chinese))
[5]董文敏.高瓦斯矿大采高工作面区段煤柱尺寸合理确定[J].煤炭科学技术,2007,35(12):67-70.(DONG Wenmin.Rationaldetermination of sectional coal size for fully mechanized coal miningface with high cutting height in high gassy mine[J].Coal Science andTechnology,2007,35(12):67-70.(in Chinese))
[6]秦永洋,许少东,杨张杰.深井沿空掘巷煤柱合理宽度确定及支护参数优化[J].煤炭科学技术,2010,38(2):15-18.(QINYongyang,XU Shaodong,YANG Zhangjie.Rational coal pillar width determinationand support parameter optimization for gateway driving along goaf indeep mine[J].Coal Science and Technology,2010,38(2):15-18.(inChinese))
[7]申志平.沿空掘巷煤柱宽度与支护参数的研究与应用[J].煤炭科学技术,2010,38(7):31-34.(SHEN Zhiping.Research andapplication of coal pillar width and support parameters for minegateway driving along goaf[J].Coal Science and Technology,2010,38(7):31-34.(in Chinese))
[8]张开智,夏均民,蒋金泉.钻孔煤粉量变化规律在区段煤柱合理参数确定中的应用[J].岩石力学与工程学报,2004,23(8):1307-1 310.(ZHANG Kaizhi,XIA Junmin,JIANG Jinquan.Variation law ofquantity of coal dust in drill hole and its application to determinationof reasonable width of coal pillars[J].Chinese Journal of RockMechanics and Engineering,2004,23(8):1 307-1 310.(in Chinese))
[9]谢广祥,杨科,刘全明.综放面倾向煤柱支承压力分布规律研究[J].岩石力学与工程学报,2006,25(3):545-549.(XIEGuangxiang,YANG Ke,LIU Quanming.Study on distribution laws of stress ininclined coal pillar for fully-mechanized top-coal caving face[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(3):545-549.(in Chinese))
[10]孟金锁.综放开采“原位”沿空掘巷探讨[J].岩石力学与工程学报,1999,18(2):205-208.(MENG Jinsuo.Study on driving gate road on“original site”in fully mechanized top coal caving mining[J].Chinese Journal of Rock Mechanics and Engineering,1999,18(2):205-208.(in Chinese))
[11]柏建彪,侯朝炯,黄汉富.沿空掘巷窄煤柱稳定性数值模拟研究[J].岩石力学与工程学报,2004,23(20):3475-3479.(BAI Jianbiao,HOU Chaojiong,HUANG Hanfu.Numerical simulation study onstability of narrow coal pillar of roadway driving along goaf[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(20):3 475-3 479.(in Chinese))
[12]曲效成,姜福兴,于正兴,等.基于当量钻屑法的冲击地压监测预警技术研究及应用[J].岩石力学与工程学报,2011,30(11):2346-2 351.(QU Xiaocheng,JIANG Fuxing,YU Zhengxing,et al.Rockburst monitoring and precaution technology based on equivalentdrilling research and its applications[J].Chinese Journal of RockMechanics and Engineering,2011,30(11):2 346-2 351.(in Chinese))
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