短語詞組短語overburden separated strata 覆巖離層mining overburden separated strata 采動(dòng)覆巖離層overburden strata structure 覆巖體結(jié)構(gòu)overburden strata movement 覆巖運(yùn)動(dòng)overburden strata grouting 覆巖注漿overburden strata activity law 覆巖運(yùn)動(dòng)規(guī)律thickness of overburden strata 覆巖巖柱厚度overburden strata ore -drawing 覆巖下放礦structure zoning of overburden strata 覆巖結(jié)構(gòu)分帶 返回 overburden strata