1 State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, Beijing 102211, China
2 State Key Laboratory of Mechanical Behavior in Traffic Engineering Structure and System Safety, Shijiazhuang Tiedao University, Shijiazhuang 050043, China
3 College of Mining, Guizhou University, Guiyang 550025, China
4 School of Energy and Mining Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
To study the mechanical properties of composite rock masses under dynamic impact, a three-dimensional SHPB simulation system was constructed using the FLAC-PFC coupling method. Based on the Weibull distribution and damage theory, an elastic damage constitutive model considering the non-uniformity of rocks was established. Dynamic impact simulations of composite coal-rock and composite rock-coal samples with different joint angles were conducted. The dynamic strength and crack propagation laws of samples with different joint angles after dynamic impact were compared and analyzed. The progressive damage evolution process of composite rock masses with different joint angles was obtained, and the energy dissipation characteristics of composite rock masses with different joint angles were given. The results show as follows. The three-dimensional SHPB model constructed by FLAC-PFC coupling is effective. The calculation results of the elastic damage constitutive model based on the Weibull distribution are compared with the experimental results to verify the correctness of the developed constitutive model. For composite rock masses with different joint angles, the damage zone begins to emerge on the coal side and expands along the joint until failure, achieving the characterization of the damage process of coal-rock under dynamic loading. For composite rock masses with different joint angles, the strain energy begins to concentrate on the coal side and expands along the joint until failure, demonstrating the spatial distribution of energy concentration and realizing the visualization of energy evolution.
JI Dong-liang, YUAN Wei, FENG Huai-ping, TAO Jian, ZHAO Hong-bao, WANG Lu-jun, LI Xiao-bin.
Dynamic Load Damage Mechanism of Composite Rock Mass with Different Joint Angles[J].
Science Technology and Engineering, 2026, 26(26): 11236-11243 DOI:10.12404/j.issn.1671-1815.2506301
JiDongliang. Study on mechanical response and progressive failure of composite rock mass under static and dynamic loading[D]. Beijing: China University of Mining and Technology-Beijing, 2023.
ZhengJianwei, ZhangXiufeng, QiQingxin, et al. Influencing analysis of bedding quantity on failure behavior of coal-rock combination under different triaxial loading conditions[J]. Science Technology and Engineering, 2025, 25(30): 12840-12846.
DaiHangyu, LiuJianfeng, LinHao, et al. Mechanical properties and acoustic emission evolution of layered shale under triaxial compression[J]. Science Technology and Engineering, 2024, 24(24): 10419-10428.
ChenGuoqing, ChenYi, SunXiang, et al. Crack coalescence and brittle failure characteristics of open rock bridges[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(5): 908-915.
TangZhicheng, XiaCaichu, DingZengzhi. Analysis of shear deformation law for intermittent jointed rock mass[J]. Rock and Soil Mechanics, 2011, 32(8): 2353-2358.
LiDiyuan, HanZhenyu, SunXiaolei, et al. Characteristics of dynamic failure of marble with artificial flaws under split Hopkinson pressure bar tests[J]. Chinese Journal of Rock Mechanics and Engineering, 2017, 36(12): 2872-2883.
ZhaoHongbao, JiDongliang, WangTao, et al. Influence and mechanism of impact load on internal structure of coal sample under biaxial static constraint[J]. Journal of Mining and Safety Engineering, 2021, 38(2): 353-360.
[18]
WenZ J, XuC L, GongF Q, et al. Mechanical response and impact tendency index correction of gangue-coal combined structure[J]. Journal of Central South University, 2025, 32(6): 2288-2306.
ZhaoYangfeng, JingGang, ChengChuanjie, et al. Tests for fracture characteristics of fractured sandstone and micro-seismic and charge induced signal laws[J]. Journal of Vibration and Shock, 2020, 39(23): 211-219, 233.
HuangHuasen, ZhangYongfa, WangChaolin, et al. Failure mechanism analysis of sandstone with cavity based on acoustic emission spectrum[J]. Science Technology and Engineering, 2025, 25(14): 6023-6034.
SongYanqi, LiMing, WangXiao, et al. Experimental test on marble containing two pre-existing cracks under loading and unloading conditions based on high-speed photography[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(S1): 2679-2689.
[25]
TangC N, ZhangY B, LiangZ Z, et al. Fracture spacing in layered materials and pattern transition from parallel to polygonal fractures[J]. Physical Review E, 2006, 73(5): 056120.
ZhangXuepeng, JiangYujing, WangGang, et al. Numerical experiments on rate-dependent behaviors of granite based on particle discrete element model[J]. Rock and Soil Mechanics, 2016, 37(9): 2679-2686.
LiuHaiming, NiChenyang, WangXihui, et al. Particle flow analysis of crack propagation characteristics of cross jointed rock under uniaxial compression[J]. Chinese Journal of Rock Mecha-nics and Engineering, 2024, 43(S2): 3710-3721.
ZhangJun, LiuXianfeng, WangTong, et al. Energy evolution law and segmented damage model of freeze-thaw limestone[J]. Science Technology and Engineering, 2024, 24(29): 12658-12666.
XieHeping, JuYang, LiLiyun. Criteria for strength and structu-ral failure of rocks based on energy dissipation and energy release principles[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(17): 3003-3010.
SunJiehao, GuoBaohua, TianShixuan, et al. Experimental study of direct shear failure characteristics of sandstone joints based on characteristic parameters of acoustic emission[J]. Rock and Soil Mechanics, 2024, 45(S1): 167-177.
ZhaoHongbao, JiDongliang, LiuShaoqiang, et al. Study on dynamic response and constitutive model of composite rock under impact loading[J]. Chinese Journal of Rock Mechanics and Engineering, 2023, 42(1): 88-99.
[38]
WeibullW. A statistical theory of strength of materials[M]. Stockholm: IVB-Handl, 1939.
[39]
ZhuW C, TangC. Numerical simulation of Brazilian disk rock failure under static and dynamic loading[J]. International Journal of Rock Mechanics and Mining Sciences, 2006, 43(2): 236-252.
[40]
TangC N, LinP, WongR H C, et al. Analysis of crack coalescence in rock-like materials containing three flaws-Part II: numerical approach[J]. International Journal of Rock Mechanics & Mining Sciences, 2001, 38(7): 925-939.
[41]
JiD L, ChengH, ZhaoH B. A voronoi tessellated model consi-dering damage evolution for modeling meso-mechanical mechanism of the sandstone[J]. Engineering Analysis with Boundary Elements, 2023, 158: 446-467.
XuKai, ChenZuqing, SunZhentao, et al. FCN-based P-and S wave decomposition technique and its application in elastic imaging[J]. Geophysical Prospecting for Petroleum, 2024, 63(6): 1126-1137.
HuHuarui, LiuShiwei, WangWende, et al. Analysis of mechani-cal behavior and damage characteristics of fractured sandstone under triaxial stress load[J]. Conservation and Utilization of Mineral Resources, 2025, 45(2): 14-21.
[46]
ZhaoG K, GuoY T, YangC H, et al. Evaluation of the cross-scale mechanical behavior and fracability of deep shales: how innovations benefit the exploitation of deep resources[J]. Advances in Geo-Energy Research, 2025, 17(2): 91-94.
[47]
DaiL P, ZhaoX, PanY S, et al. Microseismic criterion for dynamic risk assessment and warning of roadway rockburst induced by coal mine seismicity[J]. Engineering Geology, 2025, 357: 108324.
[48]
ZhaoH, JiangH, WuZ, et al. Numerical study on the mechanism of tool impact fragmentation in heterogeneous rock under confining pressure[J]. Deep Resources Engineering, 2026, 3: 100208.
DingChao, MaJianwei. Converted phase elastic wave equation intelligent migration velocity analysis based on inverse-scattering imaging[J]. Geophysical Prospecting for Petroleum, 2023, 62(4): 645-654.
[51]
WangC, LiuY, SongD, et al. Evaluation of bedding effect on the bursting liability of coal and coal-rock combination under different bedding dip angles[J]. Advances in Geo-Energy Research, 2024, 11(1): 29-40.
[52]
XuB, TangJ, LiJ, et al. Dynamic range compression dual-domain attention network for tunnel extreme exposure image enhancement in transportation visual systems[J]. Green Energy and Intelligent Transportation, 2026, 5: 100337.
[53]
CuiY, ZhangY, ZhangC H, et al. Task cognition and planning for service robots[J]. Intelligence & Robotics, 2025, 5: 119-142.
[54]
ZhangX, TangJ, PanY, et al. Experimental study on compound dynamic disaster in deep coal rock under gas and stress loading and unloading[J]. Advances in Geo-Energy Research, 2025, 16(1): 60-76.