提出了载荷传递因子的概念，给出了卸荷拱高度的计算公式和载荷传递因子的计算公式，解决了关键块上的载荷计算问题。
Based on that, the formulae of lithology factor and time factor of load transmitting were established. By means of these formulae, the problem of load calculation for roof key block can be solved.
提出了载荷传递因子的概念，给出了卸荷拱高度的计算公式和载荷传递因子的计算公式，解决了关键块上的载荷计算问题。
Based on that, the formulae of lithology factor and time factor of load transmitting were established. By means of these formulae, the problem of load calculation for roof key block can be solved.
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