Principle of setting up fault coal

Principle of setting up fault coal pillars: the distance between fault coal pillars depends on the fault distance, nature and water content of the fault. for faults with large drop, a coal pillar with a size of not less than 30m is generally set up on one side of the fault. for faults with large drop, the size of the coal pillar on one side of the fault is generally 10-15m. for faults with small drop, no fault coal pillar is usually set up. Therefore, the boundary faults F5 and F209 each have 30m coal pillars, and the reserves are not calculated. The drop of other faults in the area is small, and no fault coal pillars are left.