中国矿山工程

The evaluation of the caving ability of the Panjiatian Iron Ore Deposit is discussed by examining factors such as the ore body morphology, rock mass structure, intact rock strength, and the stress state of the original rock that affect the caving ability of the ore rock. The MRMR index classification method is used to conduct a quality analysis and evaluation of the industrial ore bodies and low-grade ore bodies of the Panjiatian Iron Mine. The MRMR value for the industrial ore bodies is 43, indicating a moderate caving ability, while the MRMR value for the low-grade ore bodies is 57, also indicating a moderate caving ability. Using the Laubscher caving chart method for caving ability evaluation, the hydraulic radius for the industrial ore bodies is found to be between 11m and 20m, and for the low-grade ore bodies, it is between 18m and 29.5m, with both values being relatively small. Through the study of the caving ability of the Panjiatian Iron Ore Deposit, it is concluded that the use of the natural caving method for mining is feasible.