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运用弹性薄板理论,对采煤工作面基本顶在回采过程中的不同阶段建立了相应的力学模型,得出了基本顶在初次来压和周期来压期间的力学公式,结合岩石失稳破坏的边界条件,可以计算出直接顶初次来压和周期来压步距。根据此计算方法对张集煤矿1215(3)工作面的来压步距进行了验证,并同时分析了基本顶的来压步距与几个主要影响因素的相互关系。
Based on the theory of elastic thin plate, a corresponding mechanical model is established for the basic roof of coal mining face during the different stages of the recovery process. The mechanical formulas of the basic roof during the initial pressure and period are obtained. Combined with the failure of rock failure Boundary conditions, you can calculate the direct top pressure and the cycle to step pressure step. According to this calculation method, the pressure steps of 1215 (3) working face in Zhangji Coal Mine are validated. At the same time, the relationship between the pressure steps of the basic roof and several main influencing factors is also analyzed.