Applying small pillar to protecting roadway is a wide used layout in mining roadway.
小煤柱护巷是工作面上风巷普遍采用的一种布置方式。
It is the most common way to remain coal safety pillar for protecting surface buildings from mining damage.
留设保护煤柱是防止建筑物受采动损坏的最常用方法。
It is the most common way to remain coal safety pillar for protecting surface buildings from mining damage.
留设保护煤柱是防止建筑物受采动损坏的最常用方法。
应用推荐