Abstract:The large-diameter deep hole stage void field followed by filling is a safe and effective method for mining inclined very thick ore bodies, and a reasonable mining field structure parameter is a prerequisite for maintaining the stability of the mining field. The structural parameters of the one-step mining field were determined by the Mathews stability diagram method, and the stability of the mining field was investigated by the numerical software FLAC3D based on the “one step at a time” recovery scheme. The results show that the structural parameters of the one-step and two-step quarries are both 45m×15m×30m. The filling body and the surrounding mine house do not reach their critical damage strength, and the quarry structural parameters are reasonable. The results of the study provide theoretical support for the safe recovery of inclined very thick ore bodies.
