Advantages, Disadvantages and Evaluation of Stage Natural Caving Mining Method

(1) Advantages

1) Low cost.

2) Large production capacity and high labor productivity.

3) If the ore control is good, the ore loss is small.

(2) Disadvantages

1) The initial infrastructure investment is large and the construction period is long.

2) The flexibility is small. Once the use is unsuccessful, it is difficult to change other mining methods.

3) The production adjustment is difficult, and increasing the production requires a long production preparation time.

4) Production management requirements are strict.

(3) Evaluation

The natural caving method has been applied for nearly 100 years. In the past 20 years, its application range has been extended from the early use of loosely broken ore bodies to the development of moderately stable ore bodies with mining joints and relatively fissures. The law is currently the mining method with the lowest mining cost in underground mining. More than 20 mines in the United States, Chile, South Africa, Indonesia and the Philippines and other countries used in the mining of iron ore, a large porphyry copper ore, molybdenum ore, diamond and asbestos. China has tried in three Yimen copper plant at the mine, Shandong Laiwu Iron and Jinshan shops such as iron ore mine in the early 1960s and 1970s ore mining block caving method loose broken ore body. In recent years, it has carried out technical cooperation with the United States and the Philippines, and adopted the natural caving method of panel or comprehensive continuous advancement in the medium-stable ore bodies of the copper ore and copper mines. Although the hair has the outstanding advantages of low cost, large production capacity and high labor productivity, the use conditions are strict, the mining process is difficult to grasp, and the management is complicated, so the method must be cautious when adopting this method.