This paper puts forward support plan through analyzing strata behavior regularity of coal roadway in seam with soft roof, soft coal and soft floor.

文章通过对永华煤矿“三软煤层”煤巷矿压规律进行分析，提出了支护方案。

youdao

This paper puts forward support plan through analyzing strata behavior regularity of coal roadway in seam with soft roof, soft coal and soft floor.

文章通过对永华煤矿“三软煤层”煤巷矿压规律进行分析，提出了支护方案。

youdao