The external load exerted on the support used in sub-level caving face generally moves forward.
放顶煤工作面的支架外载荷普遍前移。
On the basis of analyzing mechanical situation of floor strata of roadway driving along goaf in fully mechanized sub level caving face, a mechanical model was established.
在分析综放沿空掘巷底板力学环境的基础上，建立了底板力学分析模型。
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