The New Vertical Connecting Structure Research In Shaft Lining

Sinking by boring is one of the special construction methods in coal mine shaft lining through the deep alluvium,comprehensive technical indicators have reached the world advanced level, with broad application prospects. But there are still many influence factors that restrict its further development, mainly in the stability of bored shaft and local failure of bored shaft. In recent years, in the course of working that the shaft lining structure appeared local damage are mostly compressive damage. Currently there are many solutions proposed for the compression failure, One is the use of "anti" form, such as the use of high strength concrete, single-layer steel - concrete composite shaft lining, double steel - concrete composite shaft lining structure to enhance the vertical wall compressive strength, Another is to use "let" form, the use of retractable shaft connection, so that sinking shaft structure and soil simultaneously, greatly reducing the vertical additional force. But when the shaft structure to withstand the vertical Tension, the section only through the weld connection between the flange,The shaft structure cracked easily in the vertical direction, then affected the safe use of it.First, describe the double-wall steel—concrete composite design theory and the forces.In this paper, XinHu mine as an example.Study the extreme tension situation of the shaft structure when the shaft structure in vertical tension, Through the calculation of ultimate tensile strength of the shaft structure and shaft vertical connecting structure, Pointed out that the shaft vertical structure connection is the weak point. Second, to study the new vertical shaft structure such as the equal tensile strength for the weak point.Mainly, lead into the polymer adhesive material - the structure pouring sealant. Alternative cement grouting between the sections, reinforcing the vertical connected shaft structure tensile strength. To achieve the same strength design for the shaft structure and shaft vertical connecting structure. Finally, to test its feasibility from the mechanical properties,aging experiments and shaft structure similar to the simulation experiment. The results show that material properties meet the research requirements, Used to the new Vertical shaft connected structure, is feasible to design such as the same strength of the shaft structure and shaft vertical connecting structure.