基于监测数据的陡倾结构金属矿山下盘岩层移动机制研究

doi:10.13722/j.cnki.jrme.2021.0860

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Abstract In order to solve problems of ground pressure，surface collapse and buildings and structures damage caused by underground mining in metal mines with steeply dipping discontinuities，the footwall of the Jinshandian east area was taken as the research case and the basic law of ground movement was obtained first based on the in-situ failure investigation and monitoring data of underground and surface. Combined with geological conditions and theoretical analysis，the mechanism of ground movement was studied. Ground pressure appears in the roadway near the underground goaf and the F1 fault，which is mainly due to the sliding of the F1 fault caused by mining activities. The surface deformation of the footwall has experienced three accelerated stages since mining，and the accelerated deformation point coincides with the time of mining activities，surface collapse and underground roadway failure caused by steeply dipping discontinuities. It is obtained that the deformation and failure of the steeply dipping discontinuities rock mass is gradually transferred from the deep to the ground surface，which caused the movement of the ground surface and crack of buildings and structures. A ground movement mechanism analysis model of the footwall rock mass around goaf is simplified to the cantilever beam model，in which the rock mass failure is mainly caused by the F1 fault slip induced by mining and in turn causes the flexure toppling failure of the steeply dipping rock column. The failure surfaces of each rock column are connected and slip along the failure plane. The steeply dipping discontinuities are the main reasons for the large-scale ground movement of the footwall，and the special ground movement mechanism causes the monitored movement angle to be significantly smaller than the designed movement angle.

Key words： mining engineering metal mine steeply dipping discontinuities monitoring data underground mining ground movement

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	Articles by authors
	WANG Tianlong1
	2
	CHEN Congxin1
	2
	XIA Kaizong1
	2
	SHAO Yong1
	2
	LIU Xuanting1
	2
	LIU Zihang1
	YANG Kuoyu3

Cite this article:

WANG Tianlong1,2,CHEN Congxin1, et al. Study of footwall ground movement mechanism in the iron mine with steeply dipping discontinuities based on monitoring data [J]. , 2022, 41(7): 1409-1426.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0860 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/I7/1409

[1] HOEK E. Progressive caving induced by mining an inclined orebody[J]. Mining Technology(Transactions of the Institutions of Mining and Metallurgy：Section A)，1974，83：A133–A139. [2] LUPO J F. Evaluation of deformations resulting from mass mining of an inclined orebody[Ph. D. Thesis][D]. Denver：Colorado School of Mines，1996. [3] LUPO J F. Progressive failure of hanging wall and footwall Kiirunavaara Mine，Sweden[J]. International Journal of Rock Mechanics and Mining Sciences，1997，34(3/4)：184.e1–184.e11. [4] 白义如，谷志孟，白世伟. 程潮铁矿东区地下采矿引起地表沉降和岩层移动初探[J]. 岩石力学与工程学报，2002，21(3)：340–342.(BAI Yiru，GU Zhimeng，BAI Shiwei. Primary study on ground surface subsidence and rock mass movement in east area of Chengchao iron mine due to underground mining[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(3)：340–342.(in Chinese)) [5] 赵海军，马凤山，丁德民，等. 急倾斜矿体开采岩体移动规律与变形机制[J]. 中南大学学报：自然科学版，2009，40(5)：1 423–1 429. (ZHAO Haijun，MA Fengshan，DING Demin，et al. Law of ground movement and its deformation mechanism induced by mining steep deposit[J] Journal of Central South University：Science and Technology，2009，40(5)：1 423–1 429.(in Chinese)) [6] VILLEGAS T，NORDLUND E. Numerical simulation of the hangingwall subsidence using PFC2D[C]// SCHUNNESSON H，NORDLUND E，ed. Proceedings of Mass Min 2008，the 5th International Conference and Exhibition on Mass Mining. Lulea，Sweden：Lulea University of Technology Press，2008：907–916. [7] PINHEIRO A L，LANA M S，SOBREIRA F G. Use of the distinct element method to study flexural toppling at the Pico Mine，Brazil[J]. Bulletin of Engineering Geology and the Environment，2015，74(4)：1 177–1 186. [8] SVARTSJAERN M，SAIANG D，NORDLUND E，et al. A conceptual numerical modeling of large scale footwall behavior at the Kiirunavaara mine，and implications for deformation monitoring[J]. Rock Mechanics and Rock Engineering，2016，49：943–960. [9] SVARTSJAERN M，SAIANG D. Discrete element modelling of footwall rock mass damage induced by sub-level caving at the Kiirunavaara mine[J]. Minerals，2017，7(7)：109. [10] SVARTSJAERN M. A prognosis methodology for underground infrastructure damage in sublevel cave mining[J]. Rock Mechanics and Rock Engineering，2019，52：247–263. [11] VILLEGAS T，NORDLUND E. Time-dependent movements of the hangingwall at the Kiirunavaara mine[J]. International Journal of Mining Reclamation and Environment，2012，26(2)：119–133. [12] MA F S，ZHAO H J，ZHANG Y M，et al. GPS monitoring and analysis of ground movement and deformation induced by transition from open-pit to underground mining[J]. Journal of Rock Mechanics and Geotechnical Engineering，2012，(1)：86–91. [13] MA F S，ZHAO H J，YUAN R M，et al. Ground movement resulting from underground backfill mining in a nickel mine(Gansu Province，China)[J]. Natural Hazards，2015，77(3)：1 475–1 490. [14] ZHAO H J，MA F S，ZHANG Y M，et al. Monitoring and analysis of the mining-induced ground movement in the longshou mine，China[J]. Rock Mechanics and Rock Engineering，2013，46(1)：207–211. [15] XIA K Z，CHEN C X，LU Z D，et al. Investigation of the ground movement due to underground mining at the Jinshandian iron mine in China[J]. Environmental Earth Science，2019，78：715. [16] XIA K Z，CHEN C X，DENG Y Y，et al. In situ monitoring and analysis of the mining-induced deep ground movement in a metal mine[J]. International Journal of Rock Mechanics and Mining Sciences，2018，109：32–51. [17] 黄平路，陈从新. 厚覆盖层矿山地下开采地表塌陷机制分析[J]. 岩土力学，2010，31(增1)：357–362.(HUANG Pinglu，CHEN Congxin. Analysis of mechanism of surface subsidence caused by underground mining with thick overburden[J]. Rock and Soil Mechanics，2010，31(Supp.1)：357–362.(in Chinese)) [18] 杨括宇，陈从新，夏开宗，等. 崩落法开采金属矿巷道围岩破坏机制的断层效应[J]. 岩土力学，2020，41(增1)：1–12.(YANG Kuoyu，CHEN Congxin，XIA Kaizong，et al. Fault effect on the failure mechanism of surrounding rock in metal mine roadway by caving method[J]. Rock and Soil Mechanics，2020，41(Supp.1)：1–12.(in Chinese)) [19] BLACHOWSKI J，ELLEFMO S. Numerical modelling of rock mass deformation in sublevel caving mining system[J]. Acta Geodynamica et Geomaterialia，2012，9(3)：379–388. [20] 庞义辉，王国法，李冰冰. 深部采场覆岩应力路径效应与失稳过程分析[J]. 岩石力学与工程学报，2020，39(4)：682–694.(PANG Yihui，WANG Guofa，LI Bingbing. Stress path effect and instability process analysis of overlying strata in deep stopes[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(4)：682–694.(in Chinese)) [21] 陈清运. 金山店铁矿平行矿体崩落法开采岩移规律研究[博士学位论文][D]. 北京：北京科技大学，2006.(CHEN Qingyun. Research on strata movement in sub-level caving for parallel ore bodies in Jinshandian iron ore mine[Ph. D. Thesis][D]. Beijing：University of Science and Technology Beijing，2006.(in Chinese)) [22] 黄平路，陈从新. 露天与地下联合开采引起岩层移动规律的模型试验研究[J]. 岩土力学，2008，29(5)：1 310–1 314.(HUANG Pinglu，CHEN Congxin. Model test study on rock movement caused by open- underground combined mining[J]. Rock and Soil Mechanics，2008，29(5)：1 310–1 314.(in Chinese)) [23] 郑榕明，陈文胜，葛修润，等. 金山店铁矿地下开采引起地表变形规律的离散元模拟研究[J]. 岩石力学与工程学报，2002，21(8)：1 130–1 135.(CHENG Yungming，CHEN Wensheng，GE Xiurun，et al. Modeling of ground surface subsidence at Jinshandian underground iron mine by discrete element method[J]. Chinese Journal of Rock Mechanics and Engineering，2002，21(8)：1 130–1 135.(in Chinese)) [24] 庞汉松，陈从新，夏开宗，等. 基于监测数据的分段崩落采矿法地表危险变形区边界确定方法研究[J]. 岩石力学与工程学报，2020，39(4)：736–748.(PANG Hansong，CHEN Congxin，XIA Kaizong，et al. Study on the methodology for determining the ground acceptable deformation limit in sublevel caving mining based on monitoring data[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(4)：736–748.(in Chinese)) [25] 葛修润，白世伟，陈从新，等. 金山店铁矿东区地下开采的地表变形问题及其控制对策研究[R]. 武汉：中国科学院武汉岩土力学研究所，1999.(GE Xiurun，BAI Shiwei，CHEN Congxin，et al. Research on surface deformation problems and control strategies of underground mining in east area of Jinshandian iron mine[R]. Wuhan：Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，1999.(in Chinese)) [26] MARTIN D C. Time dependent deformation of rock slopes[Ph. D. Thesis][D]. London：University of London，1983. [27] MERCER K G. Investigation into the time dependent deformation behaviour and failure mechanisms of unsupported rock slopes based on the interpretation of observed deformation behavior[Ph. D. Thesis][D]. Johannesburg：University of the Witwatersrand，2006. [28] 中华人民共和国行业标准编写组. 建筑物、水体、铁路及主要井巷煤柱留设与压煤开采规范[S]. 北京：煤炭工业出版社，2017.(The Professional Standards Compilation Group of People?s Republic of China. Code of buildings，water，railway and coal pillar set for roadway and coal mining[S]. Beijing：Coal Industry Press，2017.(in Chinese)) [29] AYDAN O，KAWAMOTO T. The stability of slopes and underground openings against flexural toppling and their stabilization[J]. Rock Mechanics and Rock Engineering，1992，25(3)：143–165. [30] ADHIKARY D P，DYSKIN A V，JEWELL R J. A study of the mechanism of flexural toppling failure of rock slopes[J]. Rock Mechanics and Rock Engineering，1997，30(2)：75–93. [31] ADHIKARY D P，DYSKIN A V. Modelling of progressive and instantaneous failures of foliated rock slopes[J]. Rock Mechanics and Rock Engineering，2007，40(4)：349–362. [32] 左保成，陈从新，刘小巍，等. 反倾岩质边坡破坏机制模型试验研究[J]. 岩石力学与工程学报，2005，24(19)：3 505–3511.(ZUO Baocheng，CHEN Congxin，LIU Xiaowei，et al. Modeling experiment study on failure mechanism of counter-tilt rock slope[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(19)：3 505–3 511.(in Chinese)) [33] 陈从新，郑允，孙朝燚. 岩质反倾边坡弯曲倾倒破坏分析方法研究[J]. 岩石力学与工程学报，2016，35(11)：2 174–2 187.(CHEN Congxin，ZHENG Yun，SUN Chaoyi. An analytical approach on flexural toppling failure of counter-tilt slopes of layered rock[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(11)：2 174–2 187.(in Chinese)) [34] 郑允，陈从新，刘秀敏，等. 层状反倾边坡弯曲倾倒破坏计算方法探讨[J]. 岩石力学与工程学报，2015，34(增2)：4 252–4 261. (ZHENG Yun，CHEN Congxin，LIU Xiumin，et al. Investigation on Calculation method of layered counter-tilt slope for flexural toppling failure[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.2)：4 252–4 261.(in Chinese)) [35] 姚晔，章广成，陈鸿杰，等. 反倾层状碎裂结构岩质边坡破坏机制研究[J]. 岩石力学与工程学报，2021，40(2)：365–381.(YAO Ye，ZHANG Guangcheng，CHEN Hongjie，et al. Study on the failure mechanisms of counter-tilt rock slopes with layered cataclastic structure[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(2)：365–381.(in Chinese)) [36] 卢海峰，刘泉声，陈从新. 反倾岩质边坡悬臂梁极限平衡模型的改进[J]. 岩土力学，2012，33(2)：577–584.(LU Haifeng，LIU Quansheng，CHEN Congxin. Improvement of cantilever beam limit equilibrium model of counter-tilt rock slopes[J]. Rock and Soil Mechanics，2012，33(2)：577–584.(in Chinese)) [37] 陈从新. 复杂条件下地下采矿稳定性研究[博士学位论文][D]. 武汉：中国科学院武汉岩土力学研究所，2003.(CHEN Congxin. A study of stability of underground mining in complex conditions[Ph. D. Thesis][D]. Wuhan：Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，2003.(in Chinese))