Grouting is an important method to reinforce soft coal roadway,and the presence of primary cracks in the coal body has a......

通过对超化矿１１０９１、米村矿１５０１１、芦岭矿８＃煤综放同防尘技术的试验与研究，为软煤层开采的综合防尘提供了技术方案。......