Fracture features of brittle coal under uniaxial and cyclic compression loads
作者机构：Shaanxi Zhengtong Coal Industry Co.Ltd.Xianyang 713600China School of CivilMining and Environmental EngineeringUniversity of WollongongWollongong 2522Australia State Key Laboratory of Coal Resources and SafeMiningChina University of Mining and TechnologyXuzhou 221116China School of Energy and Safety EngineeringAnhui Universityof Science and TechnologyHuainan 232001China School of Civil EngineeringThe University of QueenslandBrisbane 4072Australia
出 版 物：《International Journal of Coal Science & Technology》 (国际煤炭科学技术学报（英文）)
年 卷 期：2023年第10卷第1期
页 面：60-72页
核心收录：
学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 0807[工学-动力工程及工程热物理] 0818[工学-地质资源与地质工程] 0837[工学-安全科学与工程] 0812[工学-计算机科学与技术（可授工学、理学学位）] 0801[工学-力学（可授工学、理学学位）]
基 金：Funding was provided by Shaanxi Zhengtong Coal Industry Co. Ltd
主 题：Fracture Crack Coal burst Acoustic emission Computed tomography
摘 要：Under the efects of complex geological and stress environments,burst hazards continue to be a major challenge for underground space utilization and deep resources exploration as its occurrence can lead to personnel causalities,equipment damage and structural *** the stress path experienced by in-situ coal body,cyclic loading appears in quite various forms for instance shearer cutting,overlying strata breakage,hydro-fracturing and blasting,during tunnel,mining and underground space utilizing *** stability of the underground coal body subject to periodic loading/unloading stress is extremely important for maintain the function of designed engineering structure for waste storage,safe mining,roadway development,gas recovery,carbon sequestration and so *** mechanical properties of hard rock subject to cyclic fatigue loads has been intensively investigated by many researchers as the rock burst induced by supercritical loads has long been a safety risk and engineering problems for civil and tunneling engineering under deep *** recently,the mechanical properties of coal samples under cyclic fatigue loads is investigated from the aspect of hysteresis,energy dissipation and irreversible damage as the burst hazards of brittle coal is rising in many ***,the crack propagation and fracture pattern of brittle coal need more research to understand the micro mechanism of burst incubation subject to cyclic fatigue loads as brittle coal can store more elastic strain energy and rapidly release the energy when its ultimate strength once *** research studied the internal crack status corresponding to diferent cyclic fatigue loading stage of brittle coal *** AE monitoring was applied during the uniaxial and cyclic loading process of brittle coal samples to record the crack intensity of samples at diferent loading *** damage evolution curve corresponding to loading status was then *** fracture pattern
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