Construction Technology on Inclined Shaft in Watery Loose Strata with Fully Mechanized Excavation Method

Abstract：According to the watery loose Cretaceous strata high influenced to the mine constructions during the mine constructions in western mine of Inner Mongolia and long construction period problem of the mine shaft with ground freezing method, the conventional mechanized excavation method was applied to replace the ground freezing method for the construction passing through the Cretaceous strata. The paper introduced a fully mechanized integrated conventional construction technology of the mine inclined shaft with the fully mechanized roadheader for heading + small excavator for rock loading + skip transportation. A comprehensive water prevention and control plan with water detective, water table drop, water sealing and water drainage was set up. Two support methods were designed with 36U type steel/ shotcreting + reinforced concrete liner and bolt/steel mesh/shotcreting + reinforced concrete liner. The floor treatment technology of soft rock strata, rock discharging technology, chain jammed treatment technology of the rock discharging system in the mechanized roadheader, transportation safety technology were developed. After above measures conducted, the watery loose features of the strata in the area affected to the mine shaft construction were effectively controlled and the loading and transportation of the rock and other problems were solved.