煤岩组合体破坏失稳及能量演化规律  

Failure Instability and Energy Evolution Law of Coal-Rock Mass

作　　者：郭晓亚 高亚斌 韩培壮 唐一博 娄同歌 王飞 GUO Xiaoya;GAO Yabin;HAN Peizhuang;TANG Yibo;LOU Tongge;WANG Fei(Taiyuan University of Technology,School of Safety and Emergency Management Engineering,Taiyuan,Shanxi 030024,China;Zhongyun International Engineering Co.,Ltd.,Zhengzhou,Hennan 450018,China)

机构地区：[1]太原理工大学安全与应急管理工程学院,山西太原030024 [2]中赟国际工程有限公司,河南郑州450018

出　　处：《矿业研究与开发》2022年第12期106-112,共7页Mining Research and Development

基　　金：国家自然科学基金资助项目(51804212,52004176);山西省高等学校科技创新项目(2020L0129);山西省高等学校青年科研人员培育计划项目(jyt20190003)。

摘　　要：为了研究煤岩组合体受载失稳和能量积聚及其演化规律,基于COMSOL数值模拟软件构建了煤-岩和煤-岩-煤组合体、岩-煤-岩组合体模型,并进行单轴压缩试验。结果表明:相同加载条件下,组合体中煤组分占比越大,抗压强度极限越小;组合体积聚的能量转化为内部弹性应变能和损伤耗散能,释放的弹性应变能是导致煤岩体发生破坏的内在因素;单轴压缩作用在煤组分和岩石组分上的应力相等,最大应力均为该组合体的抗压强度σ,组合体内部能量主要积聚在煤组分中,该组分是导致组合体发生变形破坏的能量积聚载体。研究结果可以为降低含夹矸煤层稳定性,提高顶煤回收率提供理论依据。In order to study the load instability,energy accumulation and evolution law of coal-rock mass,based on COMSOL numerical simulation software,coal-rock model,coal-rock-coal mass model and rock-coal-rock mass model were constructed,and uniaxial compression tests were carried out.The results show that under the same loading conditions,the greater the proportion of coal components in the models,the smaller the compressive strength limit.The energy accumulated in the mass models is transformed into the internal elastic strain energy and damage dissipation energy,and the released elastic strain energy is the internal factor that causes the failure of coal-rock mass.The stress of uniaxial compression on coal components is equal to that of rock components,and the maximum stress is the compressive strengthσof the mass models.The internal energy of the mass is mainly accumulated in the coal component,and the coal component is the energy accumulation carrier leading to the deformation and damage of the mass models.The research results can provide a theoretical basis for reducing the stability of coal seams containing dirt bands and improving the recovery rate of top coal.

关 键 词：煤岩组合体 弹性应变能 能量积聚 数值模拟 

分 类 号：TD324[矿业工程—矿井建设] TD313