The degrees of effects of water content wand initial average principal stress pm0 on the dynamic shear modulus of undisturbed loess reduce under the condition of pre-shearing stresses.
存在预剪应力作用时，含水率与初始平均主应力对原状黄土动剪切模量的影响程度降低；
To increase lump coal ratio in stopes, a scheme is put forward for coal falling by loose pre-shearing millisecond blasting, and hole arrangement parameters and blasting parameters are adjusted.
为提高炮采面块煤率 ，提出了松动预裂微差爆破的落煤方案 ，并对布孔参数和爆破参数进行了调整。
Water content wand initial average principal stress pm0 have significant influences on the initial dynamic shear modulus of undisturbed loess under the condition of pre-shearing stresses.
含水率与初始平均主应力对预剪应力作用下原状黄土的初始动剪切模量具有显著的影响；
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