|
|
|
| Preliminary study on the occurrence mechanism of ground pressure in iron mines under the influence of geological discontinuities |
| LIU Xiumin1，2，WANG Yue1，2，CHEN Congxin1，2，ZENG Yunchuan3，XIA Kaizong1，2，SUN Chaoyi1，2 |
| (1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. University of Chinese Academy of Sciences，Beijing 100049，China；
3. Jinshandian Iron Mine of Wuhan Iron and Steel(Group) Company，Huangshi，Hubei 435116，China)
|
|
|
|
|
Abstract Taking the east area of Jinshandian Iron Mine as the engineering research background，the occurrence mechanism of ground pressure in metal mines under the influence of geological discontinuities is studied using geological survey，displacement monitoring，numerical simulation and theoretical analysis methods. The research results show that with increasing the mining depth，the rock mass structure has a significant control effect on the range of the surrounding rock pressure around the goaf. Under the action of the dominant steeply inclined discontinuous plane，the surrounding rock on the upper wall forms an anti-dipping rock wall，and the surrounding rock of the footwall forms a dipping rock wall. The surface pressure of the hanging wall is much larger than that of the foot wall. The characteristics of ground pressure are obvious different in different regions. The roadway in the main control area of the structural plane is characterized by the overall deflection and deformation of the section，but the roadway controlled by the fault is mainly characterized by the vertical collapse of the roof，in which the incoming pressure is more serious. The spatial dislocation effect manifested by ground pressure is the result of the combined action of structural plane occurrence and local fault slip，which manifests that the roadway is stable in the mining stage，and the transportation roadway in the stage of mined and deep unmined body has a large area of continuous collapse and falling.
|
|
|
|
|
|
| [1] 赵兴东，周 鑫，赵一凡，等. 深部金属矿采动灾害防控研究现状与进展[J]. 中南大学学报：自然科学版，2021，52(8)：2 522–2 538. (ZHAO Xingdong，ZHOU Xin，ZHAO Yifan，et al. Research status and progress of prevention and control of mining disasters in deep metal mines[J]. Journal of Central South University：Science and Technology，2021，52(8)：2 522–2 538.(in Chinese)).
[2] 王田龙，陈从新，夏开宗，等. 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[J]. 岩石力学与工程学报，2022，41(7)：1 409–1 426.(WANG Tianlong，CHEN Congxin，XIA Kaizong，et al. Study of footwall ground movement mechanism in the iron mine with steeply dipping discontinuities based on monitoring data[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(7)：1 409–1 426. (in Chinese))
[3] XIA K Z，CHEN C X，LIU X M，et al. Ground movement mechanism in tectonic stress metal mines with steep structure planes[J]. Journal of Central South University，2017，24(9)：2 092–2 104.
[4] CHENG G W，CHEN C X，MA T H，et al. A case study on the strata movement mechanism and surface deformation regulation in Chengchao underground iron mine[J]. Rock Mechanics and Rock Engineering，2016，50(4)：1 011–1 032.
[5] 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(6)：32–51.
[6] DENG Y Y，CHEN C X，XIA K Z，et al. Investigation on the characteristics of overlying strata caving in the Chengchao iron mine，China[J]. Environmental Earth Sciences，2018，77(10)：362–362.
[7] 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(815)：33–39.
[8] LUPO J F. Evaluation of deformations resulting from mass mining of an inclined orebody[Ph. D. Thesis][D]. Denver：Colorado School of Mines，1996.
[9] 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.el–184.ell.
[10] 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.
[11] 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))
[12] 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))
[13] 宋卫东，徐文彬，万海文，等. 大阶段嗣后充填采场围岩破坏规律及其巷道控制技术[J]. 煤炭学报，2011，36(增2)：287–292.(SONG Weidong，XU Wenbin，WAN Haiwen，et al. Failure rules of surrounding rock in stope and controlling techniques for roadway of high-stage backfilling method[J]. Journal of China Coal Society，2011，36(Supp.2)：287–292.(in Chinese))
[14] 宋卫东，赵增山，王 浩. 断层破碎带与采准巷道围岩作用机制模拟研究[J]. 金属矿山，2004，(2)：11–13.(SONG Weidong，ZHAO Zengshan，WANG Hao. Simulation study on interaction mechanism between fault fracture zone and rock surrounding straight work[J]. Metal Mine，2004，(2)：11–13.(in Chinese))
[15] DING K，MA F，GUO J，et al. Investigation of the mechanism of roof caving in the Jinchuan nickel mine，China[J]. Rock Mechanics and Rock Engineering，2018，51(4)：1 215–1 226.
[16] 赵海军，马凤山，丁德民，等. 采动影响下巷道围岩变形与破坏的弱结构面效应[J]. 地质灾害与环境保护，2009，20(2)：51–56. (ZHAO Haijun，MA Fengshan，DING Demin，et al. Structural weakness planes effect of roadway surrounding rocks deformation and failure affected by underground mining[J]. Journal of Geological Hazards and Environment Preservation，2009，20(2)：51–56.(in Chinese))
[17] 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))
[18] 崔 峰，杨彦斌，来兴平，等. 基于微震监测关键层破断诱发冲击地压的物理相似材料模拟实验研究[J]. 岩石力学与工程学报，2019，38(4)：803–814.(CUI Feng，YANG Yanbin，LAI Xingping，et al. Similar material simulation experimental study on rockbursts induced by key stratum breaking based on microseismic monitoring[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(4)：803–814.(in Chinese))
[19] 刘建坡，李元辉，赵兴东，等. 微震技术在深部矿山地压监测中的应用[J]. 金属矿山，2008，(5)：125–128.(LIU Jianpo，LI Yuanhui，ZHAO Xingdong，et al. Technical products of micro-seism monitoring rock-bursting and its prospect[J]. Metal Mine，2008，(5)：125–128.(in Chinese))
[20] 曹安业，窦林名，秦玉红，等. 微震监测冲击矿压技术成果及其展望[J]. 煤矿开采，2007，(1)：20–23.(CAO Anye，DOU Linming，QIN Yuhong，et al. Application of microseismic technique in monitoring ground pressure in deep mines[J]. Coal Mining，2007，(1)：20–23.(in Chinese))
|
| [1] |
LI Botao1, 2, 3, TAN Yuxuan1, LIN Haifei4, 5*, WEI Jianping1, 2, 3, ZHANG Hongtu1, 2, 3, LI Shugang4, 5, WEI Zongyong4, 5, WANG Pei4, LUO Rongwei4, LIU Yanwei1, 2, 3. Mechanical properties and mesoscopic damage evolution of coal under liquid-nitrogen freezing at different initial temperatures[J]. , 2026, 45(6): 1757-1772. |
|
|
|
|
2022, Vol. 41 
