To analyze the stability of a laneway's surrounding rock with single crack, the multi-domain boundary element method is used. The sub-regions are obtained by dividing the whole region along the crack. The boundary integral equation is established in each sub-region. The traction singular quarter-point elements are collocated at the tip of the crack. For the opened or closed crack, not only the characteristic of √r in displacement but also the characteristic of 1/√r in stress near the crack tip are represented. Qua the target, the stress intensity factor is calculated. According to the theory of rock fracture mechanics, the influences of the following factors on the stability of the cracked surrounding rock are analyzed systematically: geometric position of the crack, the ration of dual-pressure, the friction factor of the crack surfaces, the length of the crack. Some valuable conclusions are obtained. This numerical method is suitable for the stability analysis of laneways with complex geometric shape and laneways in layered medium.
|Number of pages||5|
|Journal||Yantu Lixue/Rock and Soil Mechanics|
|Publication status||Published - 1 Oct 2005|
- Boundary element method
- Numerical analysis
- Stability of surrounding rock
- Stress intensity factor