(1. School of Mining and Coal，Inner Mongolia University of Science and Technology，Baotou，Inner Mongolia 014010，China；2. Inner Mongolia Key Laboratory of Mining Engineering，Baotou，Inner Mongolia 014010，China；3. Inner Mongolia Research Center for Coal Safety Mining and Utilization Engineering and Technology，Baotou，Inner Mongolia 014010，China；4. Inner Mongolia Cooperative Innovation Center for Coal Green Mining and Green Utilization，Baotou，Inner Mongolia 014010，China；5. College of Mining Engineering，Taiyuan University of Technology，Taiyuan，Shanxi 030024，China；6. School of Mining and Mechanical Engineering，Liupanshui Normal University，Liupanshui，Guizhou 553004，China；
7. College of Mining Engineering，Heilongjiang University of Science and Technology，Harbin，Heilongjiang 150022，China)
Abstract：The assessment of the degree of deterioration of surrounding rock in a roadway is a critical issue for the prediction of roof disasters，which are essentially caused by the microstructural evolution inside the rock mass. In this paper，a combination of nuclear magnetic resonance technology，numerical simulation，and energy theory is employed to investigate the pore evolution laws from small，medium，and large aperture pores and cracks to macroscopic failure during rock loading，as well as the associated energy evolution laws. The unification relationship between the “pore evolution stage” and the “energy evolution stage，” which forms a “dual-stage” evolution process，is elucidated to establish a quantitative characterization of the microstructure of rock and the degree of deterioration of surrounding rock in a roadway. The results show that the distribution characteristics of porosity evolution during uniaxial loading of the specimens are obtained，and the porosity evolution is divided into four stages：pore compaction stage，elastic deformation stage，elastic-plastic deformation stage，and plastic yield stage. The mechanism of the differences in the characteristics of the pore evolution stages between laboratory tests and numerical simulations during the pore evolution process is revealed，which is caused by the elastic deformation recovery of the specimen during the unloading process of the laboratory test. The consistency between the “pore evolution stage” and the “energy evolution stage” during the synergistic evolution process is demonstrated，and the “dual-stage” synergistic evolution process curve shows a basic consistency in normalized values，indicating a micro-macro cross-scale unification relationship between the two. A roadway surrounding rock deterioration and failure warning method based on micro-macro cross-scale rock structure synergistic evolution is constructed to comprehensively evaluate the degree of rock deterioration，give corresponding warning levels for the rock strata in the relevant areas，and provide a theoretical basis for on-site safety hazard prevention and control work.
[1] 侯朝炯. 巷道围岩控制[M]. 徐州：中国矿业大学出版社，2013：130–133.(HOU Chaojiong. Ground control of roadways[M]. Xuzhou：China University of Mining and Technology Press，2013：130–133.(in Chinese))
[2] 吴祥业，刘洪涛，李建伟，等. 重复采动巷道塑性区时空演化规律及稳定控制[J]. 煤炭学报，2020，45(10)：3 389–3 400.(WU Xiangye，LIU Hongtao，LI Jianwei，et al. Space-time evolutionary regularity of plastic zone and stability control in repetitive mining roadway[J]. Journal of China Coal Society，2020，45(10)：3 389–3 400. (in Chinese))
[3] 吴祥业，王婧雅，陈世江，等. 重复采动巷道塑性区调控原理与稳定控制[J]. 岩土力学，2022，43(1)：205–217.(WU Xiangye，WANG Jingya，CHEN Shijiang，et al. Regulation principle and stability control of plastic zone in repeated mining roadway[J]. Rock and Soil Mechanics，2022，43(1)：205–217.(in Chinese))
[4] LI H M，LI H G，WANG K L，et al. Effect of rock composition microstructure and pore characteristics on its rock mechanics properties[J]. International Journal of Mining Science and Technology，2018，28(2)：303–308.
[5] HU J H，YANG D J. Meso-damage evolution and mechanical characteristics of low-porosity sedimentary rocks under uniaxial compression[J]. Transactions of Nonferrous Metals Society of China，2020，30(4)：1 071–1 077.
[6] 周科平，李杰林，许玉娟，等. 基于核磁共振技术的岩石孔隙结构特征测定[J]. 中南大学学报：自然科学版，2012，43(12)：4 796–4 800.(ZHOU Keping，LI Jielin，XU Yujuan，et al. Measurement of pore structure characteristics of rock based on nuclear magnetic resonance technology[J]. Journal of Central South University：Natural Science，2012，43(12)：4 796–4 800.(in Chinese))
[7] 秦庆词，李克钢，李明亮，等. 基于核磁共振技术的白云岩微观损伤致劣机制研究[J]. 岩石力学与工程学报，2022，41(增1)：2 944–2 954.(QIN Qingci，LI Kegang，LI Mingliang，et al. Study on the deterioration mechanism of dolomite microscopic damage based on NMR technique[J]. Chinese Journal of Rock Mechanics and Engineering，2022，41(Supp.1)：2 944–2 954.(in Chinese))
[8] 谢和平，鞠 杨，黎立云. 基于能量耗散与释放原理的岩石强度与整体破坏准则[J]. 岩石力学与工程学报，2005，24(17)：3 003–3 010. (XIE Heping，JU Yang，LI Liyun. Rock strength and overall failure criterion based on energy dissipation and release principle[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 003–3 010. (in Chinese))
[9] 张志镇，高 峰. 单轴压缩下红砂岩能量演化试验研究[J]. 岩石力学与工程学报，2012，31(5)：953–962.(ZHANG Zhizhen，GAO Feng. Experimental research on energy evolution of red sandstone samples under uniaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(5)：953–962.(in Chinese))
[10] 王桂林，张 亮，许 明，等. 单轴压缩下非贯通节理岩体损伤破坏能量演化机制研究[J]. 岩土工程学报，2019，41(4)：639–647.(WANG Guilin，ZHANG Liang，XU Ming，et al. Energy damage evolution mechanism of non-across jointed rock mass under uniaxial compression[J]. Chinese Journal of Geotechnical Engineering，2019，41(4)：639–647.(in Chinese))
[11] 张志镇，高 峰. 单轴压缩下岩石能量演化的非线性特性研究[J]. 岩石力学与工程学报，2012，31(6)：1 198–1 207.(ZHANG Zhizhen，GAO Feng. Research on nonlinear characteristics of rock energy evolution under uniaxial compression[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(6)：1 198–1 207.(in Chinese))
[12] 张国凯，李海波，夏 祥，等. 岩石单轴压缩下能量与损伤演化规律研究[J]. 岩土力学，2015，36(增1)：94–100.(ZHANG Guokai，LI Haibo，XIA Xiang，et al. Research on energy and damage evolution of rock under uniaxial compression[J]. Rock and Soil Mechanics，2015，36(Supp.1)：94–100.(in Chinese))
[13] 卢志国，鞠文君，高富强，等. 结构性煤体间歇性破坏行为的实验及数值模拟研究[J]. 岩石力学与工程学报，2020，39(5)：971–983.(LU Zhiguo，JU Wenjun，GAO Fuqiang，et al. Experimental and numerical simulation research on intermittent failure of structured coal[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(5)：971–983.(in Chinese))
[14] 卢志国，鞠文君，王 浩，等. 硬煤冲击倾向各向异性特征及破坏模式试验研究[J]. 岩石力学与工程学报，2019，38(4)：757–768.(LU Zhiguo，JU Wenjun，WANG Hao，et al. Experimental study on anisotropy characteristics of impact tendency and failure model of hard coal[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(4)：757–768.(in Chinese))
[15] 张顺金. 透明岩体相似材料研制与实验应用研究[硕士学位论文][D]. 徐州：中国矿业大学，2014.(ZHANG Shunjin. Study on the development of transparent similar materials for rock mass and its experimental applications[M. S. Thesis][D]. Xuzhou：China University of Mining and Technology，2014.(in Chinese))
[16] 黄 曼. 岩石模型结构面的相似材料研制及力学可靠性研究[硕士专业学位论文][D]. 杭州：浙江大学，2012.(HUANG Man. Similar materials developed and mechanical reliability study on model rock structural plane[M. S. Thesis][D]. Hangzhou：Zhejiang University，2012.(in Chinese))
[17] 肖立志. 核磁共振成像测井与岩石核磁共振及其应用[M]. 北京：科学出版社，1998：34–36.(XIAO Lizhi. Nuclear magnetic resonance imaging logging and rock nuclear magnetic resonance and its application[M]. Beijing：Science Press，1998：34–36.(in Chinese))
[18] 薛苗苗，章海宁，刘堂晏，等. 定量评价储层孔隙结构的新方法[J]. 测井技术，2014，38(1)：59–64.(XUE Miaomiao，ZHANG Haining，LIU Tangyan，et al. Novel method quantitatively evaluate pore structures by sphere-cylinder model[J]. Well Logging Technology，2014，38(1)：59–64.(in Chinese))
[19] 李杰林，朱龙胤，周科平，等. 冻融作用下砂岩孔隙结构损伤特征研究[J]. 岩土力学，2019，40(9)：3 524–3 532.(LI Jielin，ZHU Longyin，ZHOU Keping，et al. Damage characteristics of sandstone pore structure under freeze-thaw cycles[J]. Rock and Soil Mechanics，2019，40(9)：3 524–3 532.(in Chinese))
[20] 张志镇. 岩石变形破坏过程中的能量演化机制[博士学位论文][D]. 徐州：中国矿业大学，2013.(ZHANG Zhizhen. Energy evolution mechanism during rock deformation and failure[Ph. D. Thesis][D]. Xuzhou：China University of Mining and Technology，2013.(in Chinese))
[21] 张 强，汪小刚，赵宇飞，等. 不同围压加载方式下土石混合体变形破坏机制颗粒流模拟研究[J]. 岩土工程学报，2018，40(11)：2 051–2 060.(ZhANG Qiang，WANG Xiaogang，ZHAO Yufei，et al. Particle flow simulation of deformation and failure mechanism of soil-rock mixture under different loading modes of confining pressure[J]. Chinese Journal of Geotechnical Engineering，2018，40(11)：2 051–2 060.(in Chinese))
[22] 刘 洋，李 爽，吴可嘉. 散粒介质剪切带细观力学结构几何演化与稳定性分析[J]. 岩石力学与工程学报，2018，37(增1)：3 686–3 700.(LIU Yang，LI Shuang，WU Kejia. Geometry evolution and stability analysis for mesoscopic mechanical structure in shear band of granular media[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(Supp.1)：3 686–3 700.(in Chinese))
[23] 杨 磊，高富强，王晓卿. 不同强度比组合煤岩的力学响应与能量分区演化规律[J]. 岩石力学与工程学报，2020，39(增2)：3 297–3 305.(YANG Lei，GAO Fuqiang，WANG Xiaoqing. Mechanical response and energy partition evolution of coal-rock combinations with different strength ratios[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(Supp.2)：3 297–3 305.(in Chinese))
[24] Itasca Consulting Group. Particle flow code(PFC)(Version 31)[R]. Minneapolis：Itasca Consulting Group，2004.
2024, Vol. 43 
