The use of the mining and mining method generally solves the cavity in the following four ways:
1 The ore is placed on both sides of the arched hollow to destroy the arch of the arched hollow, so that the suspended ore falls;
2 bury a large drug pack above the cavity, and use the explosive force to shake off the suspended ore;
3 use mine rocket blasting to eliminate voids;
4 Wash with high pressure water to eliminate the void.
1 The ore is placed on both sides of the arched hollow to destroy the arch of the arched hollow, so that the suspended ore falls;
2 bury a large drug pack above the cavity, and use the explosive force to shake off the suspended ore;
3 use mine rocket blasting to eliminate voids;
4 Wash with high pressure water to eliminate the void.
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