Feasibility study on the program of eliminating potential accident at veinlet belt orebady of Tongkeng mine

The veinlet belt orebady of Tongkeng Mine with spontaneous ignition formats a fire area, that makes mining sequence disorder, and a great number of stoped areas untreated. Those factors induce significant potential dangerous to mining. Based on the ore spontaneous ignition mechanism, the fire controlling measures, the analysis of pressure and safety, and the mining condition in the potential accident region, a technology program to completely eliminate all the space and recovery the remaining ore is developed by sequence caving. According to the blasting conditions and the expected results, the large diameter vertical bundle-hole, 100 mm diameter deep hole and small chamber are applied in the blasting design. The safety measures and the potential environment impact are also evaluated in this program.