两倍扭转标本被使用学习潜水艇在 Jinchuan III 的结实、复杂的矿石的批评裂缝生长我的。在潜水艇之间的关系批评裂缝速度 v 和压力紧张因素 K_I 被获得,并且破裂坚韧 K_(IC ) 和压力腐蚀 K_0 的更低的限制分别地是坚定的。lgK_I-lgv 和 K_I-lgv 的曲线能是很好线性的测试表演的结果,和数据的高谨慎被矿物质作文,粒子尺寸和岩石的机械性质自己引起。另外,有矿石的压力腐蚀的 thesubcritical 裂缝生长被二机制的统一功能引起,一个人是张力的压力,其它是在裂缝尖端的材料。Chemicalreaction 在环境在材料和腐蚀媒介之间发生并且让化学契约碎。那么,获得的结果为在高水平的压力状况下面在 Jinchuan III 矿预言矿石的块探穴速度提供可靠参考书。
Double torsion specimens were applied to study the subcritical crack growth of flabby and intricate ore in Jinchuan Ⅲ Mine. The relation between the subcritical crack velocity v and the stress intensity factor K1 is obtained, and the fracture toughness Kic and the lower limit of stress corrosion K0 are determined respectively. The results of test show that the curves of lgK1--lgv and K1--lgv can be well linear, and the high discretion of data are caused by mineral composition, particle size and mechanical property of rock itself. In addition, the subcritical crack growth with stress corrosion of the ore is caused by the united function of two mechanisms, one is the tensile stress and the other is the material at the crack tip. Chemical reaction takes place between the materials and the corrosion medium in the environment and makes the chemical bond break. So, the obtained results provide reliable references for predicting the block caving velocity of the ore in Jinchuan Ⅲ Mine under high horizontal stress condition.