Response mechanism characteristics of mining-induced fault activation

Authors

SUN Wenbin, College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China; State Key Laboratory of Coal Mining and Clean Utilization, Beijing 100013, China; Shaanxi Key Laboratory of Prevention and Control Technology for Coal Mine Water Hazard, Xi’an 710077, ChinaFollow
HAO Jianbang, College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
DAI Xianzheng, College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China
KONG Lingjun, College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, China

Abstract

In the process of coal mining, mining-induced stress perturbation is a key factor leading to fault activation, which is a primary challenge faced by safe coal mining. Fault activation is prone to induce geological disasters such as rock bursts and floor water inrushes of coal mines. Furthermore, it poses a serious threat to mining safety. Using the Flac^3D software for numerical simulations and similar material simulation experiments, this study established a model for faults’ stress-displacement responses under coal mining to analyze the mechanisms behind the evolution of fault structure zones in the process of coal mining. Key findings are as follows: (1) During coal mining, disturbance produced an impact earlier on stress than on displacement, and the stress peaked. (2) When the stress peaked, reaching the yield limit, the disturbance began to gradually induce displacements. (3) As the mining face constantly advanced, coal mining induced the large-scale collapse of overburden rock layers, which interpenetrated the fault zone, progressively inducing the activation of the fault zone. (4) Rather than a one-time full-stage activation, the coal mining-induced fault activation progressed gradually from upper to lower parts, exhibiting significant spatial and phased characteristics. This study, ascertaining the occurrence characteristics of fault activation, can effectively improve the early warning and prevention of a series of geological disasters and accidents, such as rock bursts and floor water inrushes, indirectly caused by fault activation. Therefore, this study holds great significance for the safe and efficient mining and production of coal mines.

Keywords

fault activation, influence of mining, numerical simulation, similarity experiment, stress analysis

DOI

10.12363/issn.1001-1986.23.09.0525

Recommended Citation

SUN Wenbin, HAO Jianbang, DAI Xianzheng, et al. (2024) "Response mechanism characteristics of mining-induced fault activation," Coal Geology & Exploration: Vol. 52: Iss. 4, Article 3.
DOI: 10.12363/issn.1001-1986.23.09.0525
Available at: https://cge.researchcommons.org/journal/vol52/iss4/3

Reference

[1] 李化敏,付凯. 煤矿深部开采面临的主要技术问题及对策[J]. 采矿与安全工程学报,2006,23(4):468−471

LI Huamin,FU Kai. Some major technical problems and countermeasures for deep mining[J]. Journal of Mining and Safety Engineering,2006,23(4):468−471

[2] 孟召平,彭苏萍,冯玉,等. 断裂结构面对回采工作面矿压及顶板稳定性的影响[J]. 煤田地质与勘探,2006,34(3):24−27

MENG Zhaoping,PENG Suping,FENG Yu,et al. Influence of fracture structure plane on underground pressure and roof stability of working face[J]. Coal Geology & Exploration,2006,34(3):24−27

[3] 王存文,姜福兴,刘金海. 构造对冲击地压的控制作用及案例分析[J]. 煤炭学报,2012,37(增刊2):263−268

WANG Cunwen,JIANG Fuxing,LIU Jinhai. Analysis on control action of geologic structure on rock burst and typical cases[J]. Journal of China Coal Society,2012,37(Sup.2):263−268

[4] 田雨桐,张平松,吴荣新,等. 煤层采动条件下断层活化研究的现状分析及展望[J]. 煤田地质与勘探,2021,49(4):60−70

TIAN Yutong,ZHANG Pingsong,WU Rongxin,et al. Research status and prospect of fault activation under coal mining conditions[J]. Coal Geology & Exploration,2021,49(4):60−70

[5] 黎良杰,钱鸣高,李树刚. 断层突水机理分析[J]. 煤炭学报,1996,21(2):119−123

LI Liangjie,QIAN Minggao,LI Shugang. Mechanism of water–inrush through fault[J]. Journal of China Coal Society,1996,21(2):119−123

[6] 宋义敏,马少鹏,杨小彬,等. 断层冲击地压失稳瞬态过程的试验研究[J]. 岩石力学与工程学报,2011,30(4):812−817

SONG Yimin,MA Shaopeng,YANG Xiaobin,et al. Experimental investigation on instability transient process of fault rock burst[J]. Chinese Journal of Rock Mechanics and Engineering,2011,30(4):812−817

[7] WANG Xuebin. Effect of height of rock specimen on strain localization,precursor to failure and entire deformational characteristics[J]. Journal of Coal Science & Engineering,2006,12(2):16−20.

[8] 张丁丁,李淑军,张曦,等. 分布式光纤监测的采动断层活化特征实验研究[J]. 采矿与岩层控制工程学报,2020,2(1):013018

ZHANG Dingding,LI Shujun,ZHANG Xi,et al. Experimental study on mining fault activation characteristics by a distributed optical fiber system[J]. Journal of Mining and Strata Control Engineering,2020,2(1):013018

[9] HOFMANN G F,SCHEEPERS L J. Simulating fault slip areas of mining induced seismic tremors using static boundary element numerical modelling[J]. Mining Technology,2011,120(1):53−64.

[10] 于广明,谢和平,杨伦,等. 采动断层活化分形界面效应的数值模拟研究[J]. 煤炭学报,1998,23(4):396−400

YU Guangming,XIE Heping,YANG Lun,et al. Numerical simulation of fractal effect induced by activation of fault after coal extraction[J]. Journal of China Coal Society,1998,23(4):396−400

[11] 林远东,涂敏,刘文震,等. 基于梯度塑性理论的断层活化机理[J]. 煤炭学报,2012,37(12):2060−2064

LIN Yuandong,TU Min,LIU Wenzhen,et al. Faults activation mechanism based on gradient–dependent plasticity[J]. Journal of China Coal Society,2012,37(12):2060−2064

[12] ALBER M,FRITSCHEN R,BISCHOFF M,et al. Rock mechanical investigations of seismic events in a deep longwall coal mine[J]. International Journal of Rock Mechanics & Mining Sciences,2009,46(2):408−420.

[13] LYU Pengfei,LU Jiabin,WANG Eryu,et al. The mechanical criterion of activation and instability of normal fault induced by the movement of key stratum and its disaster:Causing mechanism of rockburst in the Hanging Wall Mining[J]. Advances in Civil Engineering,2021,2021:6618957.

[14] ZUO Jianping,XIE Heping,ZHOU Hongwei,et al. Thermal–mechanical coupled effect on fracture mechanism and plastic characteristics of sandstone[J]. Science in China Series E:Technological Sciences,2007,50(6):833−843.

[15] ZHAO Kai,WANG Xiaoyun,FENG Yongcun,et al. Evaluation of the fault activation risk induced by hot dry rock reservoir development based on thermal–hydraulic–mechanical coupling[J]. ACS Omega,2023,8(8):8078−8091.

[16] XIE Heping,WANG Jin’an,XIE Weihong. Photoelastic study of the contact mechanics of fractal joints[J]. International Journal of Rock Mechanics and Mining Science & Geomechanics Abstracts,1997,34(5):865−874.

[17] 姜耀东,王涛,赵毅鑫,等. 采动影响下断层活化规律的数值模拟研究[J]. 中国矿业大学学报,2013,42(1):1−5

JIANG Yaodong,WANG Tao,ZHAO Yixin,et al. Numerical simulation of fault activation pattern induced by coal extraction[J]. Journal of China University of Mining & Technology,2013,42(1):1−5

[18] 蒋金泉,武泉林,曲华. 硬厚岩层下逆断层采动应力演化与断层活化特征[J]. 煤炭学报,2015,40(2):267−277

JIANG Jinquan,WU Quanlin,QU Hua. Characteristic of mining stress evolution and activation of the reverse fault below the hard–thick strata[J]. Journal of China Coal Society,2015,40(2):267−277

[19] 曹明辉,刘钒,王同旭. 断层活化过程及煤柱失稳机理的数值模拟研究[J]. 山东科技大学学报(自然科学版),2020,39(2):61−68

CAO Minghui,LIU Fan,WANG Tongxu. Numerical simulation study of fault activation process and coal pillar instability mechanism[J]. Journal of Shandong University of Science and Technology (Natural Science),2020,39(2):61−68

[20] 郭文兵,李超. 工作面回采诱发多断层活化对地表建筑物的影响分析[J]. 安全与环境学报,2018,18(1):56−60

GUO Wenbing,LI Chao. Analysis of the impact of the suffered buildings on the ground due to the mining inducing faulty activation[J]. Journal of Safety and Environment,2018,18(1):56−60

[21] ZHANG Xuebo,WANG Hao,YANG Ming,et al. Analysis of the influence mechanism of small fault activation under the influence of mining at deep coal faces[J]. ACS Omega,2022,7(41):36836−36847.

[22] 吴明明. 穿断层带巷道围岩变形特征数值模拟分析[J]. 陕西煤炭,2022,41(3):17−21

WU Mingming. Numerical simulation analysis of surrounding rock deformation characteristics of roadway crossing fault zone[J]. Shaanxi Coal,2022,41(3):17−21

[23] GUO Yanhui,LUO Luo,XU Hanhua,et al. Analysis of the regularity and mechanism of fault activation caused by deep continuous mining of Shizishan Copper Mine,China[J]. Advances in Materials Science and Engineering,2022,2022:4027231.

[24] 罗浩,李忠华,王爱文,等. 深部开采临近断层应力场演化规律研究[J]. 煤炭学报,2014,39(2):322−327

LUO Hao,LI Zhonghua,WANG Aiwen,et al. Study on the evolution law of stress field when approaching fault in deep mining[J]. Journal of China Coal Society,2014,39(2):322−327

[25] 于秋鸽,张华兴,张玉军,等. 采动影响下断层活化机理及影响因素分析[J]. 煤炭学报,2019,44(增刊1):18−30

YU Qiuge,ZHANG Huaxing,ZHANG Yujun,et al. Analysis of fault activation mechanism and influencing factors caused by mining[J]. Journal of China Coal Society,2019,44(Sup.1):18−30

[26] 郭寿松. 临近断层的工作面开采诱发断层活化机理研究[J]. 煤炭工程,2019,51(7):93−97

GUO Shousong. Study on the mechanism of fault activation induced by mining near fault zone[J]. Coal Engineering,2019,51(7):93−97

[27] 蔡武,窦林名,王桂峰,等. 煤层采掘活动引起断层活化的力学机制及其诱冲机理[J]. 采矿与安全工程学报,2019,36(6):1193−1202

CAI Wu,DOU Linming,WANG Guifeng,et al. Mechanism of fault reactivation and its induced coal burst caused by coal mining activities[J]. Journal of Mining & Safety Engineering,2019,36(6):1193−1202

[28] GUO Yanhui,LUO Luo. Monitoring and analysis of deformation evolution law of fault activation caused by deep mining in Shizishan Copper Mine,China[J]. Applied Sciences,2022,12(14):6863.

[29] 张鹏,朱学军,孙文斌,等. 采动诱发充填断层活化滞后突水机制研究[J]. 煤炭科学技术,2022,50(3):136−143

ZHANG Peng,ZHU Xuejun,SUN Wenbin,et al. Study on mechanism of delayed water inrush caused by mining–induced filling fault activation[J]. Coal Science and Technology,2022,50(3):136−143

[30] 周美立. 相似性科学[M]. 北京：科学出版社，2004.

[31] 陈育民，徐鼎平. FLAC/FLAC^3D基础与工程实例[M]. 北京：中国水利水电出版社，2008.