急倾斜煤层综放工作面冲击危险性评价研究
|
摘要
为了提高急倾斜煤层综放工作面冲击地压危险性评价指标的准确性和增强评价方法的适用性,采用数值模拟及理论计算的方法,得到了综采工作面过煤柱区域的应力分布,分析了采掘工作面应力扰动叠加的影响,提出了近直立煤层动态权重评价法的计算体系,介绍了近直立煤层冲击危险性评价指标和评价指标分级过程,并将动态权重评价法应用于+495 m水平综放工作面冲击危险性评价中。研究结果表明:碱沟煤矿急倾斜综放工作面冲击地压的主要影响因素是煤柱和采掘工作面应力扰动叠加;+495 m水平综放工作面冲击危险等级为Ⅱ级,具有弱冲击危险性,并划分了沿工作面走向830～1 000 m、370～530 m、上分层终采线前后50 m范围3个冲击危险区域,现场验证了动态权重法能有效实现急倾斜煤层冲击地压危险性评价。
In order to improve the accuracy of evaluation index and applicability of evaluation method for rock burst risk of fully-mechanized top coal caving mining face in steep coal seam,the stress distribution in the working face when passing through coal pillar area and superposition effect of excavation face and mining face were carried out by numerical simulation and theoretical calculation method.The calculation system of dynamic weight evaluation method in steep coal seam was formed. This paper determined and graded the risk assessment index for rock burst in steep coal seam,and applied the dynamic weight evaluation method to rock burst risk assessment in +495 m level working face.The results show that: the main influencing factors of rock burst in fully mechanized top coal caving mining face of Jian'gou Coal Mine are coal pillar and the superposition of stress disturbance of excavation face and mining face.The risk grade of rock burst is II in+495 m level fully-mechanized top coal caving mining face. It had weak risk of rock burst,and divided into three dangerous areas: 830 ～1 000 m strike of working face,370 ～ 530 m strike of working face,50 m range before and after upper layer'stopping mining line.The field test showed that the dynamic weight method can effectively realize the risk assessment of rock burst in steeply inclined coal seam.
In order to improve the accuracy of evaluation index and applicability of evaluation method for rock burst risk of fully-mechanized top coal caving mining face in steep coal seam,the stress distribution in the working face when passing through coal pillar area and superposition effect of excavation face and mining face were carried out by numerical simulation and theoretical calculation method.The calculation system of dynamic weight evaluation method in steep coal seam was formed. This paper determined and graded the risk assessment index for rock burst in steep coal seam,and applied the dynamic weight evaluation method to rock burst risk assessment in +495 m level working face.The results show that: the main influencing factors of rock burst in fully mechanized top coal caving mining face of Jian'gou Coal Mine are coal pillar and the superposition of stress disturbance of excavation face and mining face.The risk grade of rock burst is II in+495 m level fully-mechanized top coal caving mining face. It had weak risk of rock burst,and divided into three dangerous areas: 830 ～1 000 m strike of working face,370 ～ 530 m strike of working face,50 m range before and after upper layer'stopping mining line.The field test showed that the dynamic weight method can effectively realize the risk assessment of rock burst in steeply inclined coal seam.
引文
[1]齐庆新,窦林名.冲击地压理论与技术[M].徐州:中国矿业大学出版社,2008:32-38.
[2] LU Caiping,LIU Guangjian,LIU Yang.Microseismic multi-parameter characteristics of rock-burst hazard induced by hard roof fall and high stress concentration[J]. International Journal of Rock Mechanics&Mining Sciences,2015,24(2):18-32.
[3]韩光,崔铁军,王来贵.不同采深及倾角条件下煤(岩)体冲击地压模拟研究[J].采矿与安全工程学报,2018,35(2):308-315.HAN Guang,CUI Tiejun,WANG Laigui. Research on coal(rock)burst process simulation under different mining depth and dip angle[J].Journal of Mining&Safety Engineering,2018,35(2):308-315.
[4]翟明华,刘金海,田昭军,等.深井综放工作面侧向支承压力分布及冲击危险性评价[J].煤炭科学技术,2017,45(12):19-22,29.ZHAI Minghua,LIU Jinhai,TIAN Zhaojun,et al.Survey on side abutment pressure distribution and rock burst riskevaluation in deep fully-mechanized caving face[J]. Coal Science and Technology,2017,45(12):19-22,29.
[5]杜涛涛,李国营,陈建强,等.新疆地区冲击地压发生及防治现状[J].煤矿开采,2018,23(2):5-10.DU Taotao,LI Guoying,CHEN Jianqiang,et al. Rock-burst occurrence and prevention status in Xinjiang Region[J]. Coal Mining Technology,2018,23(2):5-10.
[6]鞠文君,潘俊锋.我国煤矿冲击地压监测预警技术的现状与展望[J].煤矿开采,2012,17(6):1-5.JU Wenjun,PAN Junfeng.Status and prospect of rock-burst monitoring and alarm technology in Chinese coal mine[J].Coal mining Technology,2012,17(6):1-5.
[7]王书文,毛德兵,潘俊锋,等.基于煤层围岩波速结构探测的工作面冲击危险性预评价技术[J].岩石力学与工程学报,2014,33(2):3848-3854.WANG Shuwen,MAO Debin,PAN Junfeng,et al. Rock-burst hazard pre-evaluation technology based on wave velocity structure detection of coal bed surrounding rock[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(2):3848-3854.
[8]窦林名,何学秋.冲击矿压防治理论与技术[M].徐州:中国矿业大学出版社,2001:88-97.
[9]窦林名,贺虎,何江,等.冲击危险评价的相对应力集中系数叠加法[J].煤炭学报,2018,43(2):328-332.DOU Linming,HE Hu,HE Jiang,et al. New method of rockburst risk assessment using relative stress concentration factor superposition[J].Journal of China Coal Society,2018,43(2):328-332.
[10]曲孔典,马文强,刘钒,等.冲击地压综合指数法中采空区宽度评价指数修正[J].煤炭技术,2016,35(5):93-95.QU Kongdian,MA Wenqiang,LIU Fan,et al. Evaluation index modification of gob width in comprehensive index method about rock-burst[J].Coal Technology,2016,35(5):93-95.
[11]陈建强,闫瑞兵,刘昆轮.乌鲁木齐矿区冲击地压危险性评价方法研究[J].煤炭科学技术,2018,46(10):26-29.CHEN Jianqiang,YAN Ruibing,LIU Kunlun.Study on evaluation method of rock-burst danger in Urumqi Mining Area[J]. Coal Science and Technology,2018,46(10):26-29.
[12]秦忠诚,陈光波,李谭,等.基于集对分析-区间三角模糊数的冲击地压耦合评价模型及应用[J].山东科技大学学报:自然科学版,2019,38(1):16-24.QIN Zhongcheng,CHEN Guangbo,LI Tan,et al. Evaluation model and application of rock-burst coupling based on set pair analysis and interval triangular fuzzy number[J].Journal of Shandong University of Science and Technology(Nature Science),2019,38(1):16-24.
[13]尹永明,张兴凯,周建新,等.基于模糊综合评判的冲击地压危险性分区预评价技术研究[J].中国安全生产科学技术,2017,13(3):180-184.YIN Yongming,ZHANG Xingkai,ZHOU Jianxin,et al. Study on zoning pre-evaluation technology of rock-burst risk based on fuzzy comprehensive evaluation[J].Journal of Safety Science and Technology,2017,13(3):180-184.
[14]曾繁慧,张晶,汪北方,等.煤矿冲击地压危险性模糊综合评价[J].辽宁工程技术大学学报:自然科学版,2018,37(1):205-209.ZENG Fanhui,ZHANG jing,WANG Beifang,et al.Fuzzy comprehensive evaluation of rock-burst risk in coal mine[J]. Journal of Liaoning Technical University:Natural Science,2018,37(1):205-209.
[15]张宏伟,荣海,陈建强,等.基于地质动力区划的近直立特厚煤层冲击地压危险性评价[J].煤炭学报,2015,40(12):2756-2761.ZHANG Hongwei,RONG Hai,CHEN Jianqiang,et al. Risk assessment of rockburst based on geo-dynamic division method in suberect and extremely thick coal seam[J].Journal of China Coal Society,2015,40(12):2756-2761.
[16]邓志刚.基于三维地应力场反演的宏观区域冲击危险性评价[J].煤炭科学技术,2018,46(10):78-82.DENG Zhigang.Danger evaluation of pressure bump in macro area based on 3D geostress field inversion[J].Coal Science and Technology,2018,46(10):78-82.
[17]姜福兴,舒凑先,王存文.基于应力叠加回采工作面冲击危险性评价[J].岩石力学与工程学报,2015,34(12):2428-2435.JIANG Fuxing,SHU Couxian,WANG Cunwen. Impact risk appraisal of stope working faces based on stress superimposition[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(12):2428-2435.
[18]秦子晗.沿空工作面冲击危险性动态权重评价方法研究[J].煤矿开采,2014,19(1):87-90.QIN Zihan.Dynamic weight evaluation method for rock-burst danger in mining face along gob[J]. Coal Mining Technology,2014,19(1):87-90.
[2] LU Caiping,LIU Guangjian,LIU Yang.Microseismic multi-parameter characteristics of rock-burst hazard induced by hard roof fall and high stress concentration[J]. International Journal of Rock Mechanics&Mining Sciences,2015,24(2):18-32.
[3]韩光,崔铁军,王来贵.不同采深及倾角条件下煤(岩)体冲击地压模拟研究[J].采矿与安全工程学报,2018,35(2):308-315.HAN Guang,CUI Tiejun,WANG Laigui. Research on coal(rock)burst process simulation under different mining depth and dip angle[J].Journal of Mining&Safety Engineering,2018,35(2):308-315.
[4]翟明华,刘金海,田昭军,等.深井综放工作面侧向支承压力分布及冲击危险性评价[J].煤炭科学技术,2017,45(12):19-22,29.ZHAI Minghua,LIU Jinhai,TIAN Zhaojun,et al.Survey on side abutment pressure distribution and rock burst riskevaluation in deep fully-mechanized caving face[J]. Coal Science and Technology,2017,45(12):19-22,29.
[5]杜涛涛,李国营,陈建强,等.新疆地区冲击地压发生及防治现状[J].煤矿开采,2018,23(2):5-10.DU Taotao,LI Guoying,CHEN Jianqiang,et al. Rock-burst occurrence and prevention status in Xinjiang Region[J]. Coal Mining Technology,2018,23(2):5-10.
[6]鞠文君,潘俊锋.我国煤矿冲击地压监测预警技术的现状与展望[J].煤矿开采,2012,17(6):1-5.JU Wenjun,PAN Junfeng.Status and prospect of rock-burst monitoring and alarm technology in Chinese coal mine[J].Coal mining Technology,2012,17(6):1-5.
[7]王书文,毛德兵,潘俊锋,等.基于煤层围岩波速结构探测的工作面冲击危险性预评价技术[J].岩石力学与工程学报,2014,33(2):3848-3854.WANG Shuwen,MAO Debin,PAN Junfeng,et al. Rock-burst hazard pre-evaluation technology based on wave velocity structure detection of coal bed surrounding rock[J].Chinese Journal of Rock Mechanics and Engineering,2014,33(2):3848-3854.
[8]窦林名,何学秋.冲击矿压防治理论与技术[M].徐州:中国矿业大学出版社,2001:88-97.
[9]窦林名,贺虎,何江,等.冲击危险评价的相对应力集中系数叠加法[J].煤炭学报,2018,43(2):328-332.DOU Linming,HE Hu,HE Jiang,et al. New method of rockburst risk assessment using relative stress concentration factor superposition[J].Journal of China Coal Society,2018,43(2):328-332.
[10]曲孔典,马文强,刘钒,等.冲击地压综合指数法中采空区宽度评价指数修正[J].煤炭技术,2016,35(5):93-95.QU Kongdian,MA Wenqiang,LIU Fan,et al. Evaluation index modification of gob width in comprehensive index method about rock-burst[J].Coal Technology,2016,35(5):93-95.
[11]陈建强,闫瑞兵,刘昆轮.乌鲁木齐矿区冲击地压危险性评价方法研究[J].煤炭科学技术,2018,46(10):26-29.CHEN Jianqiang,YAN Ruibing,LIU Kunlun.Study on evaluation method of rock-burst danger in Urumqi Mining Area[J]. Coal Science and Technology,2018,46(10):26-29.
[12]秦忠诚,陈光波,李谭,等.基于集对分析-区间三角模糊数的冲击地压耦合评价模型及应用[J].山东科技大学学报:自然科学版,2019,38(1):16-24.QIN Zhongcheng,CHEN Guangbo,LI Tan,et al. Evaluation model and application of rock-burst coupling based on set pair analysis and interval triangular fuzzy number[J].Journal of Shandong University of Science and Technology(Nature Science),2019,38(1):16-24.
[13]尹永明,张兴凯,周建新,等.基于模糊综合评判的冲击地压危险性分区预评价技术研究[J].中国安全生产科学技术,2017,13(3):180-184.YIN Yongming,ZHANG Xingkai,ZHOU Jianxin,et al. Study on zoning pre-evaluation technology of rock-burst risk based on fuzzy comprehensive evaluation[J].Journal of Safety Science and Technology,2017,13(3):180-184.
[14]曾繁慧,张晶,汪北方,等.煤矿冲击地压危险性模糊综合评价[J].辽宁工程技术大学学报:自然科学版,2018,37(1):205-209.ZENG Fanhui,ZHANG jing,WANG Beifang,et al.Fuzzy comprehensive evaluation of rock-burst risk in coal mine[J]. Journal of Liaoning Technical University:Natural Science,2018,37(1):205-209.
[15]张宏伟,荣海,陈建强,等.基于地质动力区划的近直立特厚煤层冲击地压危险性评价[J].煤炭学报,2015,40(12):2756-2761.ZHANG Hongwei,RONG Hai,CHEN Jianqiang,et al. Risk assessment of rockburst based on geo-dynamic division method in suberect and extremely thick coal seam[J].Journal of China Coal Society,2015,40(12):2756-2761.
[16]邓志刚.基于三维地应力场反演的宏观区域冲击危险性评价[J].煤炭科学技术,2018,46(10):78-82.DENG Zhigang.Danger evaluation of pressure bump in macro area based on 3D geostress field inversion[J].Coal Science and Technology,2018,46(10):78-82.
[17]姜福兴,舒凑先,王存文.基于应力叠加回采工作面冲击危险性评价[J].岩石力学与工程学报,2015,34(12):2428-2435.JIANG Fuxing,SHU Couxian,WANG Cunwen. Impact risk appraisal of stope working faces based on stress superimposition[J].Chinese Journal of Rock Mechanics and Engineering,2015,34(12):2428-2435.
[18]秦子晗.沿空工作面冲击危险性动态权重评价方法研究[J].煤矿开采,2014,19(1):87-90.QIN Zihan.Dynamic weight evaluation method for rock-burst danger in mining face along gob[J]. Coal Mining Technology,2014,19(1):87-90.