Mining Process of Working Face Passing Through Subsided Column in Tianchi Coal Mine

For solving the effect of collapse column on coalface of Tianchi Coal Mine, to improve the efficiency of coal mining, we took technical measures of water detection and drainage for collapse column, and propose the feasible methods of shallow-frustum and shearer cutting directly and blasting vibration of the gangue, to forced a passage through the collapse column by controlling the mining height. The result showed that the application of the scheme for passing through the collapse column forcibly ensured continuous coal mining, not only saved money but also improved the recovery rate of coal resources.