采矿与岩层控制工程学报2024，Vol.6Issue(1)：87-98,12.
动荷载作用下不同应力波透射性结构面围岩层裂特性
Spallation characteristics of surrounding rock with structural planes with different stress wave transmittance under dynamic load
摘要
Abstract
The mechanical characteristics of the structural plane are determined by surrounding rock structure,the location and tensile strength of the structural plane significantly affect the propagation of stress waves in rocks.In this research,sandstone was used as the research sample,and laboratory experiments were performed to invesiti-gate the failure characteristics of the surrounding rock with low stress wave transmission structural planes.The ABAQUS/Explicit numerical model of the surrounding rock with high stress wave transmission structural planes was established.The experimental results were used to verify the model.The failure characteristics of the overall chamber's surrounding rock under different conditions of high transmission structural plane tensile strength,posi-tion,and incident wave amplitude were studied.With the increase of the tensile strength of the structural plane,the length of the surrounding rocks'spallation with low stress wave transmission structural planes gradually de-creases,while the spall length of the high stress wave transmission structural planes is irrelevant to the tensile strength of the structural plane.The surrounding rock with high stress wave transmission structural planes often fails before the structural plane under the disturbance of stress waves,which is different from the mode that the structural plane fails before the surrounding rock in the experiment of rock bars with low stress wave transmission structural planes.When the high stress wave transmission structural plane is far away from the free end in the chamber's surrounding rock,it does not affect the location of spallation.When it is close to the free end,only the structural plane fails.With the increase of stress wave amplitude,the failure modes of surrounding rock with the high stress wave transmission structural planes are:no failure,intact surrounding rock-structural plane tensile failure,and surrounding rock spalling failure-structural plane tensile failure.The results are important for the safety and stability of underground chambers.关键词
围岩/结构面/数值模拟/层裂Key words
surrounding rock/structural plane/numerical simulation/spallation分类
矿业与冶金引用本文复制引用
朱建波,毕硕,孙家鑫,暴伟越,廖志毅,王钥..动荷载作用下不同应力波透射性结构面围岩层裂特性[J].采矿与岩层控制工程学报,2024,6(1):87-98,12.基金项目
国家重点研发计划资助项目(2022YFC3004602) （2022YFC3004602）
国家自然科学基金资助项目(52325404) （52325404）
珠江人才计划引进创新创业团队资助项目(2019ZT08G315) （2019ZT08G315）
深圳市基础研究资助项目(JCYJ20220818095605012) （JCYJ20220818095605012）
深圳大学2035卓越研究计划资助项目(2022B001) （2022B001）
