论文部分内容阅读
为分析多节理岩体岩梁的失稳机理,采用离散元软件3DEC建立多节理岩梁模型,模拟分析多节理岩梁失稳过程及失稳形式。结果表明:构成岩梁的岩块数为奇数时,岩梁失稳过程中呈四铰拱结构受力,岩块数为偶数时,岩梁呈三铰拱结构受力;岩梁的失稳主要包括中部岩块滑移以及铰点处节理面开裂;由于横推力作用,节理面的开裂仅发生在铰点处;节理开裂度反映了节理面开裂的程度;节理对齐时,滑落岩块截面为长方形,节理错开时,滑落岩块截面为等腰梯形;节理错开时岩梁的稳定性要高于节理对齐时。
In order to analyze the instability mechanism of rock mass with multi-jointed rock mass, discrete element software 3DEC was used to establish multi-joint rock beam model to simulate and analyze the instability process and failure mode of multi-joint rock. The results show that when the number of rock masses constituting the rock beam is odd number, the four-hinged arch structure is subjected to force in the process of rock instability. When the rock mass number is even, the rock beam is subjected to three-hinge arch structure. The instability of the rock beam mainly includes Due to the lateral thrust, the crack of the joint surface only occurs at the hinge point; the joint cracking degree reflects the degree of cracking of the joint surface; when the joints are aligned, the section of the rock falling block is rectangular , When the joint is staggered, the section of the sliding block is isosceles trapezoid; the stability of the rock beam when the joint is staggered is higher than that when the joint is aligned.