Study on the influence of coal-rock interface roughness on ultra-low friction effect
LI Liping1，HU Xuejin1，PAN Yishan2，SUN Yuantao1
(1. School of Mechanics and Engineering，Liaoning Technical University，Fuxin，Liaoning 123000，China；
2. Institute of Disaster Rock Mechanics，Liaoning University，Shenyang，Liaoning 110036，China)
Abstract：To reveal the influence mechanism of coal-rock interface roughness on ultra-low friction rock burst under dynamic load disturbance，a self-designed ultra-low friction test device for coal-rock interface is used. The coal rock block of 1 082 m mining depth in Shenyang Hongyang Three Mine is used as the research object. The coal block is used as the working block，different roughness characteristics of coal-rock interface is simulated by changing the surface roughness of coal blocks. The horizontal displacement of the working block is used to characterize the ultra-low friction effect strength during the impact process. The influence of different roughnesses of coal-rock interface on ultra-low friction effect of coal-rock block under stress wave disturbance is tested. The results show that：(1) under different coal-rock interface roughnesses，the ultra-low friction effect has a frequency sensitivity value. When the disturbance frequency is 2 Hz，the coal-rock interface is more prone to ultra-low friction effects. (2) The disturbance amplitude is linearly positively correlated with the ultra-low friction effect strength. The smaller the coal-rock interface roughness，the greater the horizontal displacement and horizontal acceleration of the working block，and the greater the ultra-low friction effect strength. The greater the coal-rock interface roughness，the greater the increase of the horizontal displacement and acceleration of the working block，and the greater the influence of the disturbance amplitude on the ultra-low friction effect. (3) The roughness only affects the ultra-low friction effect within a certain range，and JRC = 3.81 is the critical value affecting the ultra-low friction effect. (4) The greater the horizontal impact force，the greater the horizontal displacement and horizontal acceleration of the working block，and the greater the ultra-low friction effect strength.
李利萍1，胡学锦1，潘一山2，孙媛涛1. 煤岩界面粗糙度对超低摩擦效应影响研究[J]. 岩石力学与工程学报, 2024, 43(4): 851-861.
LI Liping1，HU Xuejin1，PAN Yishan2，SUN Yuantao1. Study on the influence of coal-rock interface roughness on ultra-low friction effect. , 2024, 43(4): 851-861.
[1] 何满潮，谢和平，彭苏萍，等. 深部开采岩体力学研究[J]. 岩石力学与工程学报，2005，24(16)：2 803–2 813.(HE Manchao，XIE Heping，PENG Suping，et al. Research on rock mass mechanics in deep mining[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(16)：2 803–2 813.(in Chinese))
[2] 何满潮. 深部开采工程岩石力学现状及其展望[C]// 第八次全国岩石力学与工程学术大会论文集. 北京：科学出版社，2004：88–94.(HE Manchao. Current situation and prospect of rock mechanics in deep mining engineering[C]// Proceedings of the 8th National Conference on Rock Mechanics and Engineering. Beijing：Science Press，2004：88–94.(in Chinese))
[3] 潘一山. 煤矿冲击地压[M]. 北京：科学出版社，2018：156–178.(PAN Yishan. Rock burst in coal mine[M]. Beijing：Science Press，2018：156–178.(in Chinese))
[4] 李利萍. 煤矿深部超低摩擦型冲击地压理论与试验研究[博士学位论文][D]. 阜新：辽宁工程技术大学，2018.(LI Liping. Theoretical and experimental study of ultra-low friction rock burst in deep coal mine[Ph. D. Thesis][D]. Fuxin：Liaoning Technical University，2018.(in Chinese))
[5] KURLENYA M V，OPARIN V N. Problems of nonlinear geomechanics. Part II[J]. Journal of Mining Science，2000，36(4)：305–326.
[6] KURLENYA M V，OPARIN V N，BALMASHNOVA E G，et al. On dynamic behavior of self-stressed block media. Part 1. One-dimensional mechanico-mathematical model[J]. Journal of Mining Science，2001，37(1)：1–9.
[7] ALEKSANDROVA N，SHER E. Modeling of wave propagation in block media[J]. Journal of mining science，2004，40(6)：579–587.
[8] ALEKSANDROVA N，CHERNIKOV A G，SHER E. Experimental investigation into the one-dimensional calculated model of wave propagation in block medium[J]. Journal of Mining Science，2005，41(3)：232–239.
[9] 王明洋，戚承志，钱七虎. 深部岩体块系介质变形与运动特性研究[J]. 岩石力学与工程学报，2005，24(16)：2 825–2 830.(WANG Mingyang，QI Chengzhi，QIAN Qihu. Study on deformation and motion characteristics of deep rock mass block system[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(16)：2 825–2 830.(in Chinese))
[10] 王洪亮，葛 涛，王德荣，等. 块系岩体动力特性理论与实验对比分析[J]. 岩石力学与工程学报，2007，26(5)：951–958.(WANG Hongliang，GE Tao，WANG Derong，et al. Comparative analysis of theoretical and experimental dynamic characteristics of block rock mass[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(5)：951–958.(in Chinese))
[11] WU H，FANG Q，ZHANG Y D，et al. Mechanism of anomalous low friction phenomenon in deep block rock mass[J]. Mining Science and Technology，2009，19(4)：409–419.
[12] 吴 昊，方 秦，王洪亮. 深部块系岩体超低摩擦现象的机制分析[J]. 岩土工程学报，2008，30(5)：769–775.(WU Hao，FANG Qin，WANG Hongliang. Mechanism analysis of ultra-low friction phenomenon in deep block rock mass[J]. Chinese Journal of Geotechnical Engineering，2008，30(5)：769–775.(in Chinese))
[13] RUTTER E H，HACKSTON A J，YEATMAN E，et al. Reduction of friction on geological faults by weak-phase smearing[J]. Journal of Structural Geology，2013，51(1)：52–60.
[14] 何满潮，王 炀，刘冬桥，等. 基于二维数字图像相关技术的块系花岗岩超低摩擦效应实验研究[J]. 煤炭学报，2018，43(10)：2 732–2 740.(HE Manchao，WANG Yang，LIU Dongqiao，et al. Experimental study on ultra-low friction effect of block granite based on two-dimensional digital image correlation technology[J]. Journal of China Coal Society，2018，43(10)：2 732–2 740.(in Chinese))
[15] 蒋海明，李 杰，王明洋. 块系岩体滑移失稳中低摩擦效应的理论与试验研究[J]. 岩土力学，2019，40(4)：1 405–1 412.(JIANG Haiming，LI Jie，WANG Mingyang. Theoretical and experimental study on low friction effect in slip instability of block rock mass[J]. Rock and Soil Mechanics，2019，40(4)：1 405–1 412.(in Chinese))
[16] LIU D，LIN Y，WANG Y，et al. Experimental study on ultra-low friction effect of granite block under coupled static and dynamic loads[J]. Geotechnical and Geological Engineering，2020，38(16)：4 521–4 528.
[17] 李利萍，余泓浩，张海涛，等. 含软弱夹层煤岩界面超低摩擦效应试验研究[J]. 岩石力学与工程学报，2023，42(7)：1 638–1 649.(LI Liping，YU Honghao，ZHANG Haitao，et al. Experimental study on ultra-low friction effect at the interface of coal rock containing weak sandwich[J]. Chinese Journal of Rock Mechanics and Engineering，2023，42(7)：1 638–1 649.(in Chinese))
[18] 李利萍，唐 垒，潘一山，等. 应力波扰动对砂岩块体超低摩擦效应影响分析[J]. 岩石力学与工程学报，2021，40(增1)：2 773–2 780. (LI Liping，TANG Lei，PAN Yishan，et al. Analysis of influence of stress wave disturbance on anomalously low friction effect in sandstone block[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(Supp.1)：2 773–2 780.(in Chinese))
[19] 李利萍，潘一山，鞠翔宇，等. 平均应力对超低摩擦型冲击地压影响试验研究[J]. 中国矿业大学学报，2020，49(1)：76–83.(LI Liping，PAN Yishan，JV Xiangyu，et al. Experimental study on the influence of average stress on ultra-low friction rock burst[J]. Journal of China University of Mining and Technology，2020，49(1)：76–83.(in Chinese))
[20] BARTON N. Review of a new shear-strength criterion for rock joints[J]. Engineering Geology，1973，7(4)：287–332.
[21] TSE R，CRUDEN D M. Estimating joint roughness coefficients[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1979，16(5)：303–307.
[22] YANG Z Y，LO S C，DI C C. Reassessing the joint roughness coefficient(JRC) estimation using Z2[J]. Rock Mechanics and Rock Engineering，2001，34(3)：243–251.
[23] EL-SOUDANI S M. Profilometric analysis of fractures[J]. Metallography，1978，11(3)：247–336.
[24] MAERZ N H，FRANKLIN J A，BENNETT C P. Joint roughness measurement using shadow profilometry[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1990，27(5)：329–343.
[25] 谢和平. 岩石节理的分形描述[J]. 岩土工程学报，1995，17(1)：18–23.(XIE Heping. Fractal description of rock joints[J]. Chinese Journal of Geotechnical Engineering，1995，17(1)：18–23.(in Chinese))
[26] 谢和平，PARISEAU W G. 岩石节理粗糙系数(JRC)的分形估计[J].中国科学(B辑)，1994，24(5)：524–530.(XIE Heping，PARISEAU W G. Fractal estimation of rock joint roughness coefficient(JRC)[J]. Science of China(Series B)，1994，24(5)：524–530.(in Chinese))
[27] 杜时贵，陈 禹，樊良本. JRC修正直边法的数学表达[J]. 工程地质学报，1996，4(2)：36–43.(DU Shigui，CHEN Yu，FAN Liangben. The mathematical expression of JRC modified straight edge method[J]. Journal Engineering Geology，1996，4(2)：36–43.(in Chinese))
[28] 张凯旋. 基于表面粗糙度的煤体活性剂润湿特性研究[硕士学位论文][D]. 焦作：河南理工大学，2020.(ZHAGN Kaixuan.Study on wetting properties of coal active agents based on surface roughness[M. S. Thesis][D]. Jiaozuo：Henan Polytechnic University，2020.(in Chinese))
[29] 孙金斗. 基于层间摩擦滑动的冲击地压实验研究[硕士学位论文][D]. 北京：北方工业大学，2020.(SUN Jindou. Experimental study of rock burst based on interlayer friction sliding[M. S. Thesis][D]. Beijing：North China University of Technology，2020.(in Chinese))
[30] 王来贵，赵国超，刘向峰，等. 滑动过程中砂岩节理摩擦因数演化规律[J]. 煤炭学报，2021，46(9)：2 874–2 882.(WANG Laigui，ZHAO Guochao，LIU Xiangfeng，et al. Evolution of friction factor of sandstone joints in sliding process[J]. Journal of China Coal Society，2021，46(9)：2 874–2 882.(in Chinese))
[31] 李新平，汪 斌，周桂龙. 我国大陆实测深部地应力分布规律研究[J]. 岩石力学与工程学报，2012，31(增1)：2 875–2 880.(LI Xinping，WANG Bin，ZHOU Guilong. Study on the distribution law of in-situ stress in China?s mainland[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(Supp.1)：2 875–2 880.(in Chinese))
[32] 陈绍杰. 煤岩强度与变形特征实验研究及其在条带煤柱设计中的应用[硕士学位论文][D]. 青岛：山东科技大学，2005.(CHEN Shaojie. Experimental study on strength and deformation characteristics of coal and rock and its application in strip coal pillar design[M. S. Thesis][D]. Qingdao：Shandong University of Science and Technology，2005.(in Chinese))
[33] 周宏伟，谢和平，左建平. 深部高地应力下岩石力学行为研究进展[J]. 力学进展，2005，35(1)：91–99.(ZHOU Hongwei，XIE Heping，ZUO Jianping. Research progress of rock mechanical behavior under deep high geostress[J]. Advances in Mechanics，2005，35(1)：91–99.(in Chinese))
[34] 刘 涛，杨 鹏，吕文生，等. 岩石在不同应力幅值下受低频循环扰动的力学特性试验[J]. 煤炭学报，2017，42(9)：2 280–2 286.(LIU Tao，YANG Peng，LV Wensheng，et al. Rock mechanical properties experiments with low-frequency circulation disturbance under different stress amplitudes[J]. Journal of China Coal Society，2017，42(9)：2 280–2 286.(in Chinese))
[35] 何满潮，刘冬桥，宫伟力，等. 冲击岩爆试验系统研发及试验[J].岩石力学与工程学报，2014，33(9)：1 729–1 739.(HE Manchao，LIU Dongqiao，GONG Weili，et al. Development of a testing system for impact rockbursts[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(9)：1 729–1 739.(in Chinese))
2024, Vol. 43 
