深部开采对地表塌陷坑治理后影响评价
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摘要
针对矿山塌陷坑治理后深部开采对其扰动影响评估问题开展研究。通过岩石物理力学性质试验,获取岩石的基础力学参数;开展现场节理裂隙调查及统计分析,得到岩体结构面分布规律;采用GSI法进行岩体质量评价,并据此给出相应岩体的力学参数建议;最后,通过数值模拟技术建立深部开采对地表变形影响评价模型,分析对地表塌陷坑治理后的安全效应。研究结果表明,采用"隔三采一"的空场嗣后充填采矿法后,地表的沉降变形、水平变形和倾斜变形均能够满足规范要求,对地表塌陷坑治理后的充填体扰动影响较小,在研究条件下可保证地表塌陷坑治理后的安全需求。
The influence of deep mining on the disturbance of mine collapse pit is studied.The basic physical and mechanical parameters of rocks are obtained by tests.The distribution law of rock mass joints is obtained by field joint investigation and statistical analysis.The GSI method is used to evaluate the rock mass quality,and the corresponding mechanical parameters of rock mass are suggested.Finally,an evaluation model of the impact of deep mining on surface deformation is established through numerical simulation,and the safety effect of surface collapse pit treatment is analyzed.The results show that the surface subsidence deformation,horizontal deformation and inclined deformation can meet the requirements of the code after the open stope backfilling mining method of"mining at intervals of three times and one time"is adopted,which has little influence on the backfill disturbance after surface collapse pit treatment and can ensure the safety requirements after surface collapse pit treatment under the research conditions.
The influence of deep mining on the disturbance of mine collapse pit is studied.The basic physical and mechanical parameters of rocks are obtained by tests.The distribution law of rock mass joints is obtained by field joint investigation and statistical analysis.The GSI method is used to evaluate the rock mass quality,and the corresponding mechanical parameters of rock mass are suggested.Finally,an evaluation model of the impact of deep mining on surface deformation is established through numerical simulation,and the safety effect of surface collapse pit treatment is analyzed.The results show that the surface subsidence deformation,horizontal deformation and inclined deformation can meet the requirements of the code after the open stope backfilling mining method of"mining at intervals of three times and one time"is adopted,which has little influence on the backfill disturbance after surface collapse pit treatment and can ensure the safety requirements after surface collapse pit treatment under the research conditions.
引文
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[2]包继锋,周富诚.大红山铁矿地表塌陷区综合治理方案研究[J].现代矿业,2016,32(2):135-137,146.BAO Jifeng,ZHOU Fucheng.Research on the comprehensive treatment scheme of surface subsidence in Dahongshan iron mine[J].Modern Mining,2016,32(2):135-137,146.
[3]付华,陈从新,夏开宗.崩落法引起的地表塌陷机制分析[J].矿业研究与开发,2017,37(8):47-51.FU Hua,CHEN Congxin,XIA Kaizong.Mechanism analysis on surface subsidence caused by caving method[J].Mining Research and Development,2017,37(8):47-51.
[4]郭俊廷,李全生.浅埋高强度开采地表破坏特征:以神东矿区为例[J].中国矿业,2018,27(4):106-112.GUO Junting,LI Quansheng.Surface damage characteristics in shallow-buried coal seam with strong disturbance mining:taking Shendong coal mine district as an example[J].China Mining Magazine,2018,27(4):106-112.
[5]江飞飞,周辉,盛佳,等.完全充填开采下地表变形特征分析及现状评价[J].岩石力学与工程学报,2018,37(10):2344-2358.JIANG Feifei,ZHOU Hui,SHENG Jia,et al.Analysis and evaluation of surface deformation characteristics under the condition of completely backfill mining[J].Chinese Journal of Rock Mechanics and Engineering,2018,37(10):2344-2358.
[6]冯锐敏.充填开采覆岩移动变形及矿压显现规律研究[D].北京:中国矿业大学(北京),2013.
[7]原野,王贺,解联库,等.深部充填开采覆岩移动规律及其对地表构筑物影响性研究[J].中国矿业,2016,25(S2):240-245.YUAN Ye,WANG He,XIE Lianku,et al.Research on distortion rule and characteristics of surface protection under deep filling mining[J].China Mining Magazine,2016,25(S2):240-245.
[8]肖武,邵芳,李立平,等.单一采区工作面不同开采顺序地表沉陷模拟与复垦对策分析[J].中国矿业,2015,24(4):53-57.XIAO Wu,SHAO Fang,LI Liping,et al.Mining subsidence simulation and reclamation strategy for different mining sequence for panels in underground coal mines[J].China Mining Magazine,2015,24(4):53-57.
[9] ULUSAYR.The ISRM suggested methods for rock characterization,testing and monitoring:2007-2014[M].Springer,2014.
[10] HOEK E,CARRANZA-TORRES C,CORKUM B.HoekBrown failure criterion-2002edition[C]∥Proceedings of the North American Rock Mechanics Society NARMS-TAC2002.2002.