Damage characteristics and energy evolution law of high static load coal-rock combination under the influence of dynamic load parameters

Abstract

Based on MTS Landmark 370.50 rock dynamic and static load fatigue test system and acoustic emission (AE) monitoring method, the damage characteristics and energy evolution law of high static load coal-rock combination (CRC) under the influence of dynamic load parameters were studied. The main results are as follows: 1) Dynamic load increases the rheological properties and damage fracture development of CRC. With the increase of the amplitude and frequency of the dynamic load, the number of dynamic load cycles required for the failure of the CRC decreases, the irreversible strain increases, and the failure of sample accelerates; 2) The AE positioning events during the loading process of the specimen decrease with the increase of the dynamic load amplitude, and increase with the increase of the dynamic load frequency; 3) The fractal dimension, total energy and cumulative elastic energy of the broken particles of the CRC increase with the increase of the amplitude and frequency of the dynamic load. The fractal dimension corresponding to the increase of the dynamic load frequency is larger, and the energy and cumulative elastic energy corresponding to the increase of the dynamic load amplitude are larger.

Keywords

dynamic-static load / dynamic load parameters / coal-rock combination / damage and failure / energy evolution

References

[1] Yang Z-y, Zhou L, Zhou C-l, et al.. Research on the dynamic failure behavior of fissured tunnel subjected to combined dynamic and static loads [J]. Theoretical and Applied Fracture Mechanics, 2023, 124: 103780

[2] Han F-j, Jiang N, Yao Y-k, et al.. Dynamic response characteristics and instability mechanism of layered surrounding rock tunnels affected by geostress under dynamic and static loads [J]. Engineering Failure Analysis, 2024, 160: 108202

[3] Meng N-k, Bai J-b, Chen Y, et al.. Stability analysis of roadside backfill body at gob-side entry retaining under combined static and dynamic loading [J]. Engineering Failure Analysis, 2021, 127: 105531

[4] Kang H-p, Gao F-q, Xu G, et al.. Mechanical behaviors of coal measures and ground control technologies for China’s deep coal mines–A review [J]. Journal of Rock Mechanics and Geotechnical Engineering, 2023, 15(1): 37-65

[5] Tang L, Tu S-h, Tu H-s, et al.. Mining-induced stress evolution mechanism and control technology of working face in deep coal seam bifurcation and merging area: A case study [J]. Environmental Earth Sciences, 2024, 83(7205

[6] Sun X M, Zhao W C, Shen F X, et al.. Study on failure mechanism of deep soft rock roadway and high prestress compensation support countermeasure [J]. Engineering Failure Analysis, 2023, 143: 106857

[7] Shan P-f, Shi Y-w, Lai X-p, et al.. Analysis of the evolution characteristics of infrared energy of coal samples under composite disturbance of dynamic and static loads [J]. Environmental Earth Sciences, 2024, 83(7191

[8] Liu H-l, Feng X-h, Liu L-y, et al.. Mechanical properties and failure characteristics of anisotropic shale with circular hole under combined dynamic and static loading [J]. International Journal of Rock Mechanics and Mining Sciences, 2023, 170: 105524

[9] Zang Z-s, Li Z-h, Zhao E-l, et al.. Electric potential response characteristics and constitutive model of coal under axial static load-dynamic load coupling [J]. Natural Resources Research, 2023, 32(62821-2844

[10] Feng C-c, Wang Z-l, Wang J-g, et al.. Damage characteristics analysis and constitutive model establishment for deep rock considering pre-static loads and frequentdynamic disturbance [J]. Environmental Earth Sciences, 2023, 82(23559

[11] Gong H-l, Wang G, Luo Y, et al.. Shear failure and mechanical behaviors of granite with discontinuous joints under dynamic disturbance: Laboratory tests and numerical simulation [J]. Archives of Civil and Mechanical Engineering, 2023, 23(3171

[12] Liu T-t, Zhang C, Li X-p, et al.. Triaxial experimental study of mechanical behavior of non-persistent jointed granite subjected to slight cyclic dynamic disturbances [J]. Theoretical and Applied Fracture Mechanics, 2024, 130: 104254

[13] Zhang J-w, Fan W-b, Yang Y, et al.. Dynamic response and energy evolution of sandstone under combined dynamic and static loading [J]. Soil Dynamics and Earthquake Engineering, 2023, 174: 108168

[14] Zhou Z-l, Cai X, Li X-b, et al.. Dynamic response and energy evolution of sandstone under coupled static-dynamic compression: Insights from experimental study into deep rock engineering applications [J]. Rock Mechanics and Rock Engineering, 2020, 53(31305-1331

[15] Yang S, Ning J-g, Zhang X-l, et al.. Determination of critical energy for coal impact fracture under coupled static-dynamic loading [J]. Engineering Failure Analysis, 2024, 160: 108222

[16] Zhou X, Liu X-f, Wang X-r, et al.. Failure characteristics and mechanism of coal under the coupling between different confining pressures and disturbance loading [J]. Bulletin of Engineering Geology and the Environment, 2023, 82(12442

[17] Jing S-l, Wen Z-j, Jiang Y-j, et al.. Mechanical behaviors and failure characteristics of coal-rock combination under quasi-static and dynamic disturbance loading: A case based on a new equipment [J]. Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2024, 10(12

[18] Zhang K, Zhang S, Ren J-x, et al.. Study on characteristics of acoustic emission b value of coal rock with outburst-proneness under coupled static and dynamic loads [J]. Shock and Vibration, 2023, 2023: 2400632

[19] Jiang Y-j, Liang B, Wang D, et al.. Experimental study on failure mechanical properties and acoustic emission characteristics of soft rock-coal combination under dynamic disturbance [J]. Engineering Failure Analysis, 2024, 158: 108016

[20] Chai Y-j, Dou L-m, Cai W, et al.. Experimental investigation into damage and failure process of coal-rock composite structures with different roof lithologies under mining-induced stress loading [J]. International Journal of Rock Mechanics and Mining Sciences, 2023, 170: 105479

[21] Tang L-z, Wu J-l, Liu T, et al.. Mechanical experiments of marble under high stress and cyclic dynamic disturbance of small amplitudeamplitude [J]. Journal of Central South University (Science and Technology), 2014, 45(124300-4307(in Chinese)

[22] Tang L, Tu S-h, Tu H-s, et al.. Compressive failure characteristics of a coal-rock combination at different angles: Experimental study and fractal analysis [J]. Fractal and Fractional, 2024, 8(4240

[23] Li W-l, Tu S-h, Zhao T-B. Study on the tensile failure characteristics and energy calculation model of coal seam hard roof considering the mining speed [J]. Applied Sciences, 2024, 14(135734

[24] Wen X-z, Feng G-r, Wang P-f, et al.. Mechanical response of sandstone under coupling action of high static stress and low frequency disturbance [J]. Rock and Soil Mechanics, 2022, 43(123426-3436

[25] Lyu C, Ma C, Dai H-y, et al.. A creep model for salt rock considering damage during creep [J]. Mechanics of Time-Dependent Materials, 2024, 28(1): 255-272

[26] Qiao L-p, Wang Z-c, Liu J, et al.. Internal state variable creep constitutive model for the rock creep behavior [J]. Bulletin of Engineering Geology and the Environment, 2022, 81(11): 456

[27] Liu L-y, Zhang Z, Wang T, et al.. Evolution characteristics of fracture volume and acoustic emission entropy of monzogranite under cyclic loading [J]. Geomechanics and Geophysics for Geo-Energy and Geo-Resources, 2024, 10(116

[28] Mu K, Zhang M-h, Yu J. Study on stress relaxation and acoustic emission of fractured rocks with different fissure inclinations [J]. Case Studies in Construction Materials, 2024, 20: e02935

[29] Liu X-w, Meng Y-y, Jing H-w, et al.. Effects of bedding plane properties on mechanical, acoustic emission and micro failure characteristics of bedded rock mass [J]. Bulletin of Engineering Geology and the Environment, 2024, 83(5191

[30] Li R-z, Zhu P, Li S-y, et al.. Fractal behavior of size distribution and specific surface area of blasting fragments [J]. Applied Sciences, 2023, 13(2111832

[31] Hossain M S, Kruhl J H. Fractal geometry-based quantification of shock-induced rock fragmentation in and around an impact crater [J]. Pure and Applied Geophysics, 2015, 172(72009-2023

[32] Wang H-l, Liu S-q, Qu X, et al.. Field investigations on rock fragmentation under deep water through fractal theory [J]. Measurement, 2022, 199: 111521

[33] Zhou Z-l, Li X-b, Zuo Y-j, et al.. Fractal characteristics of rock fragmentation at strain rate of 100 - 102 s⁻¹ [J]. Journal of Central South University of Technology, 2006, 13(3290-294

[34] Wang K, Zuo X-h, Du F, et al.. Macromesoscopic perspective damage characteristics and energy-damage constitutive model of coal-rock composite structures subjected to cyclic loading [J]. Jounal of China Coal Society, 2024, 49(2767-784(in Chinese)

[35] Guo Q-f, Pan J-l, Cai M-f, et al.. Analysis of progressive failure mechanism of rock slope with locked section based on energy theory [J]. Energies, 2020, 13(5): 1128

[36] Yan B-q, Kang H-p, Zuo J-p, et al.. Study on damage anisotropy and energy evolution mechanism of jointed rock mass based on energy dissipation theory [J]. Bulletin of Engineering Geology and the Environment, 2023, 82(8294

[37] Meng Q-b, Zhang M-w, Zhang Z-z, et al.. Research on non-linear characteristics of rock energy evolution under uniaxial cyclic loading and unloading conditions [J]. Environmental Earth Sciences, 2019, 78(23650

[38] Ning J-g, Wang J, Jiang J-q, et al.. Estimation of crack initiation and propagation thresholds of confined brittle coal specimens based on energy dissipation theory [J]. Rock Mechanics and Rock Engineering, 2018, 51(1119-134

[39] Shirani Faradonbeh R, Taheri A, Karakus M. Failure behaviour of a sandstone subjected to the systematic cyclic loading: Insights from the double-criteria damage-controlled test method [J]. Rock Mechanics and Rock Engineering, 2021, 54(11): 5555-5575

[40] Zhu S-t, Feng Y, Jiang F-X. Determination of abutment pressure in coal mines with extremely thick alluvium stratum: A typical kind of rockburst mines in China [J]. Rock Mechanics and Rock Engineering, 2016, 49(5): 1943-1952

[41] Zhao Y-x, Zhou J-l, Zhang C, et al.. Failure mechanism of gob-side roadway in deep coal mining in the Xinjie mining area: Theoretical analysis and numerical simulation [J]. Journal of Central South University, 2023, 30(5): 1631-1648

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