Due to the simple structure of the method, the available range is very large. Practice has shown that the applicable conditions of the law are:
(1) The surface and surrounding rock are allowed to collapse.
(2) The ore stability is above medium and the mining roadway does not require a large amount of support. With the development of support technology, after the application of spray anchor support in recent years, the requirements for ore stability have been reduced, but the stability of the mining roadway must be ensured. Otherwise, due to the destruction of the mining roadway, a large amount of ore loss will be caused. The surrounding rock of the lower plate should be above medium stability, so as to facilitate the excavation of various mining lanes; the stability of the rock on the upper plate side is not limited. When the rock on the upper plate is not stable, compared with other large caving methods, the method is more To be beneficial.
(3) A thick ore body that is steeply inclined or a very thick ore body that is gently inclined.
(4) Because the ore loss rate and rock mixing rate of the method are large, the ore value should not be very high, the ore is optional or the surrounding rock contains grade. ,
(5) It is necessary to remove the conditions of stone inclusion or graded ore in the ore. It is advantageous to use this method.
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