Numerical simulation and actual measurement analysis of overburden failure height based on PFC
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摘要: 为了直观、清晰地掌握煤层开采覆岩裂隙发育演化情况，确定覆岩破坏高度，归纳相对应的演化规律，以伊犁矿区为试验研究对象，采用离散元颗粒流软件PFC3D建立数值模拟三维模型，依据现场测得的宏观参数，模拟工作面推进160 m时各煤层采高范围覆岩破坏情况，并采用钻孔实时彩色成像技术对PFC3D模拟情况进行全面验证。研究结果表明：煤层采高与上覆岩层垮落强度呈正相关关系，煤层采高越大，上覆岩层垮落高度越大，上覆岩层垮落发生时期基本相同，垮落强度有所增加；PFC3D模拟显示覆岩内部裂隙以竖向裂隙为主，其裂缝倾角达到50°以上，而且具有高角度直逼垂直岩层层面裂隙的发育特点。Abstract: In order to intuitively and clearly grasp the development and evolution of overburden rock fractures in coal mining, determine the failure height of overburden, and conclude the corresponding evolution law, taking Yili mining area as the experimental research object, using discrete element particle flow software PFC3D to establish the three-dimensional model of numerical simulation, according to the macroscopic parameters measured on site, simulating the damage of the overburden rock in each coal seam when the working face is advanced 160 m, and adopting real-time color TV imaging technology of drilling to fully verify the PFC3D simulation. The research results show that:the coal seam mining thickness has a positive correlation with the overburden collapse strength, the greater the coal mining thickness, the greater the overburden collapse height, the overburden collapse occurs during the same period, and the collapse intensity increase; PFC3D simulation shows that the internal fissures in the overburden are mainly vertical fissures, and the inclination angle of the fissures has reached more than 50°, and the fissure development characteristics with a high angle close to the vertical rock layer.
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[1] 侯公羽,胡涛,李子祥,等.基于分布式光纤技术的采动影响下覆岩变形演化规律试验研究[J].岩土力学, 2020(3):970-979. [2] 黄庆享,韩金博.浅埋近距离煤层开采裂隙演化机理研究[J].采矿与安全工程学报, 2019(4):706-711. [3] 煤炭科学研究总院北京开采研究所.煤矿地表移动与覆岩破坏规律及其应用[M].北京:煤炭工业出版社, 1983. [4] 王岩,王路军,张兴华,等.保护层开采后周围煤岩体采动裂隙分布规律的研究[J].煤矿安全, 2008(1):11-14. [5] 张玉军,张华兴,陈佩佩.覆岩及采动岩体裂隙场分布特征的可视化探测[J].煤炭学报, 2008(11):1216-1219. [6] HUANG Xuchao, FAN Cheng, WANG Rui, et al. Study on gas emission prediction of steeply inclined coal seam applied horizontal slice mining[J]. Journal of Engineering Science and Technology Review, 2019, 12(2):17-26.
[7] 黄远,刘曦,沈永炬.薄基岩下采动覆岩破坏变形规律[J].煤矿安全, 2012(8):201-203. [8] YU Xueyi, MAO Xuwei. A preliminary discrimination model of a deep mining landslide and its application in the Guanwen coal mine[J].Bulletin of Engineering Geology and the Environment, 2020, 79(2):485-493.
[9] JU Minghe, LI Xuehua, YAO Qiangling, et al. Effect of sand grain size on simulated mining-induced overburden failure in physical model tests[J].Engineering Geology, 2017(5):93-106.
[10] 侯恩科,陈育,车晓阳,等.浅埋煤层过沟开采覆岩破坏特征及裂隙演化规律研究[J/OL].煤炭科学技术:1-10[2020-12-05] .http://kns.cnki.net/kcms/detail/11.2402.td.20200302.1440.002.html. [11] 白建平,郝春生,杨昌永,等.综采工作面覆岩采动裂隙三维分布规律研究[J].煤炭科学技术, 2020, 48(11):106-112. [12] 杨俊哲,张彬,付兴玉,等.浅埋薄基岩工作面水砂溃涌通道形成机理[J].煤炭学报, 2020, 45(12):4144-4153. [13] 张玉军,李凤明.高强度综放开采采动覆岩破坏高度及裂隙发育演化监测分析[J].岩石力学与工程学报, 2011(增刊1):2994-3001. [14] WANG Hongzhi, ZHANG Dongsheng, WANG Xufeng, et al. Visual exploration of the spatiotemporal evolution law of overburden failure and mining-induced fractures:a case study of the Wangjialing Coal Mine in China[J].Minerals.http://www.mdpi.com/2075-163X/7/3/35.
[15] ZHANG Yun, CAO Shenggen, ZHANG Nan, et al. The application of short-wall block backfill mining to preserve surface water resources in northwest China[J].Journal of Cleaner Production, 2020(7):261.
[16] 崔峰,贾冲,来兴平,等.缓倾斜冲击倾向性顶板特厚煤层重复采动下覆岩两带发育规律研究[J].采矿与安全工程学报, 2020(3):514-524. [17] 丁航.补连塔煤矿大采高工作面覆岩运移规律[J].煤矿安全, 2019(12):179-183. [18] 申晨辉,康永华,刘秀娥,等.浅埋近松散含水层下综放开采覆岩破坏特征[J].煤矿开采, 2019(1):77-80. [19] WANG Tao, ZHOU Weibo, CHEN Jinhua, et al. Simulation of hydraulic fracturing using particle flow method and application in a coal mine[J]. International Journal of Coal Geology.http://doi.org/10.1016/j.coal.2013.10.012.
[20] 王刚,王锐,武猛猛,等.渗透压-应力耦合作用下煤体常规三轴试验的颗粒流模拟[J].岩土力学, 2016, 37(增刊1):537-546. [21] 张礼,廉振山,潘铁柱,等.基于覆岩裂隙分布特征的高位钻孔设计研究[J].煤矿安全, 2019(3):154-158. [22] 余学义,郭文彬,赵兵朝.冈瓦纳地层特厚煤层顶水分层开采覆岩破坏规律综合研究[J].矿业安全与环保, 2016, 43(2):71-75. [23] 王锐,修毓,王刚,等.基于颗粒流理论的煤与瓦斯突出数值模拟研究[J].山东科技大学学报(自然科学版), 2016(4):52-61. [24] 邓玉华,孙国文,黄滚.倾斜煤层深部开采覆岩破坏规律的数值模拟研究[J].矿业安全与环保, 2015, 42(5):15-20. -
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