Abstract:A high strength and high performance concreter shaft liner was applied to a deep mine free-zing shaft ,could reduce the loop diameter of the freezing borehole layout ,could reduce the number of the freezing boreholes and could save the freezing borehole construction time and the pipe material cost.Meanwhile ,the thickness of the mine shaft liner could be reduced ,the excavation quantity of the mine shaft could be reduced ,the mine shaft sinking speed could be speeded up and the good technical and economic benefit could be obtained.A study was conducted on the preparation experiment of the high strength and high performance concrete applied to the mine freezing shaft liner and an optimal mixing ratio was obtained.The high strength and high performance concrete of the mine freezing shaft liner was successfully applied to three deep mine freezing shaft sinking projects of Baleng Mine and good effects were obtained.

Abstract:A principle of “prediction and forecast ,driving do with water detection ,water detection first and driving second” was followed by a water detection and drainage in the gateway of a mining block in Mudu Chaideng Mine? A water flowing structure ,watery abnormal zone and improper sealed borehole detected in the front of a gateway driving face should be treated by a water prevention and control technical idea with“a treatment and control first and driving second”? In combination with a surface physical exploration ,underground mine DC electrical method advance physical exploration and driving face drilling detection ,each conclusion mutually confirmed would effectively avoid a miss opening of an aquifer and could ensure a safety construction of the mine gateway? A combination with the long or short borehole detection could meet the requirements of the water detection and drainage and could re duce the water detection and drainage period? In the construction of the gateway in the mining block , several watery zones were detected and were effectively prevented and controlled with the expected effect.