It is a complicated problem involving several of subjects such as geology, coal mining, rock hydraulics and rock crackmechanics.
煤层底板突水是涉及地质学、煤矿开采学、岩体水力学和岩石断裂力学等学科的一个复杂问题。
2
Stress intensity factor (k). A factor used in fracture mechanics to specify the stress intensity at the tip of a crack.
应力强度因子(K)：断裂力学中使用的一个因子，说明裂纹尖端处的应力强度。
3
Fatigue damage estimation of the tendons was made using fracture mechanics approach, establishing the fracture crack growth rate model and limit state equations for failure modes.