Research Progress on Mine Shaft Liner Breaking Mechanism and Prevention Technologies in Deep and Thick Overburden

The paper introduced the research status and progress on mine shaft liner breaking mechanism and the prevention technology in the deep and thick ove rburden and analyzed the breaking causes of the mine shaft liner in the overburden section.The paper had a discussion on the wide applied the vertical additional force theory and other theories. As pointed out, the mining activities could make underground water table dropping and the strata consolidation and compaction could cause t he overburden subsidence. Therefore a vertical additional force would be effected on the mine shaft liner and the vertical additional force would be the main factor to ca use breakings on the mine shaft liner.According to the cause, the paper had an introduction, analysis and evaluation on the conventional measures to the present preve ntion of the mine shaft liner breaking and had a discussion on the mine shaft liner breaking mechanism and existing problems in the technical prevention measures.