摘要
为了揭示应力环境下水射流破碎煤岩机理及影响规律,采用SPH-FEM耦合算法研究应力加载条件下脉冲水射流冲击煤岩破坏行为,探讨不同应力环境、煤岩强度、孔隙率等工况下煤岩损伤破坏特征及其影响规律。研究结果表明:脉冲射流破碎煤岩的深度和面积均随二维应力和煤岩强度的增加呈指数型降低,随煤岩孔隙率的增加呈线性增加,破碎坑周围重度损伤区范围随煤岩强度和孔隙率的增加而降低。研究结果可为脉冲射流高效破碎受载煤岩提供参考。
To reveal the mechanism and influence laws of water jet breaking coal rock under the stress environment,the SPH-FEM coupling algorithm was adopted to study the failure behavior of coal rock impacted by pulsed water jet under the stress loading conditions.The damage and failure characteristics of coal rock and their influencing laws under different stress environments,coal rock strengths,and porosities were investigated.The results show that both the depth and area of pulsed jet breaking coal rock present an exponential decreasing trend with the increase of two-dimensional stress and coal rock strength,and increase linearly as the porosity of coal rock increases.The range of severe damage around the crushing pit decreases with the increase of coal rock strength and porosity.The research results can provide reference for the efficient breaking of loaded coal rock by pulsed jet.
作者
冯仁俊
朱永建
何建新
FENG Renjun;ZHU Yongjian;HE Jianxin(School of Resource&Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan Hunan 411201,China;CCTEG Xinjiang Research Institute,Urumqi Xinjiang 830000,China;Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Goal Mines,Hunan University of Science and Technology,Xiangtan Hunan 411201,China)
出处
《中国安全生产科学技术》
北大核心
2025年第2期90-98,共9页
Journal of Safety Science and Technology
基金
国家自然科学基金项目(52274194)。
