摘要
利用3dec数值模拟软件模拟不同倾角贯通裂隙煤岩单轴压缩实验,通过统计分析岩块破坏时块体单元劣化数和子接触劣化数,得出不同倾角裂隙煤岩单轴压缩能量损耗机制。试验结果表明:接触面倾角在0°～30°范围内的岩样能量损耗主要由块体单元劣化引起,接触面倾角在45°～60°范围内的岩样损伤主要由子接触劣化引起;面储能以及面法向能峰值随接触面倾角增大而减小,面切向能随倾角增大而增大,在单轴压缩应力环境下,面切向能释放是导致接触面滑移的原因。
The 3 dec numerical simulation software was used to simulate uniaxial compression experiments of fractured coal and rock with different inclination angles.The energy loss mechanism of uniaxial compression of fractured coal and rock with different inclination angles was obtained by statistical analysis on deterioration numbers of block unit and sub-contact during rock block failure.The experimental results were concluded as follows.Firstly,the energy loss of rock samples with contact angle of 0°~30°was mainly caused by the block units deterioration,and the damage of rock samples with contact angle of 45°~60°was mainly caused by sub-contact deterioration.Secondly,with the increase of the contact angle,the surface energy storage and the peak value of normal energy decreased,and the tangential energy increased.Thirdly,under uniaxial compressive stress,the release of surface tangential energy was the cause of contact slip.
作者
王浩飞
张晓勇
况丹阳
王楠
WANG Haofei;ZHANG Xiaoyong;KUANG Danyang;WANG Nan(School of Civil and Resources Engineering,University of Science and Technology Beijing,Beijing 100083,China;Key Laboratory of High-efficient Mining and Safety of Metal Mines of Ministry of Education,University of Science and Technology Beijing,Beijing 100083,China;Sanshandao Gold Mine,Shandong Gold Mining Industry(Laizhou)Co.,Ltd,Laizhou,Shandong 261441,China)
出处
《矿业研究与开发》
CAS
北大核心
2019年第4期27-32,共6页
Mining Research and Development
基金
国家自然基金面上项目(51774022)
关键词
节理岩体
能量耗散
单元劣化
子接触劣化
Jointed rock mass
Energy dissipation
Unit deterioration
Sub-contact deterioration
