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平巷工作面前方岩体的力学概念根据莫尔强度理论,对掘进工作面前方的岩体可作如下分析。 1、工作面前方岩体的切向应力分布在没有内压力的情况下如图1。σ_(tz)=2S_z σ_(ty)=2S_y 式中:σ_(AZ):A面承受竖直
Mechanics concept of rock mass in front of roadway According to Moiré’s theory of strength, the rock mass in front of heading face can be analyzed as follows. 1, the tangential stress distribution of the rock mass in front of the working face is shown in Fig. 1 under the condition of no internal pressure. σ_ (tz) = 2S_z σ_ (ty) = 2S_y where: σ_ (AZ): A surface is subjected to vertical