Study on coal pillar mining of substation in soft rock stratum

In this paper, the mining schemes of coal resources overlaid under the substation in the condition of weak strata were studied in the Loess Plateau in Ch ina. Through the comparative analysis of coal mining, small coal pillars and coordinated all-mining schemes, coordinated all-mining scheme was proposed. The plan wa s successful after trial mining and observation. It had reached the goal of ensuring the safe and normal use of ground substations and fully mining overlaid coal resourc es. Studies had shown that under the conditions of soft rock formations, the goal of smooth ground deformation could be achieved by controlling the parameters of the working face and the mining progress. It was feasible to fully mine under the structures.