The ground collapse and cracks caused by undergroundmining severely threaten the safe in production and destroy the surface environment.
地下采矿引起的地表塌陷和裂缝,严重威胁矿山生产安全,破坏地表生态环境。
2
A method is proposed for determining the initial time of corrosion of steel bolts in undergroundenvironment based on investigation of corrosion of steel bolts in many mining projects.