What regulations should be met in the case of stratified caving mining?
2. The width of the stratified approach road should not exceed 3m , and the stratification height should not exceed 3.5m ;
3. The adjacent layered alleys or cross-spans on the upper and lower side of the stope shall be staggered, the thickness of the rock wall shall not be less than 2.5m , and the upper and lower stratified approaches of the stope shall correspond;
4. When the adjacent ore blocks are harvested at the same time, the delamination height difference of the mining should not exceed two stratification heights; in the horizontal direction, when the upper and lower stratifications are simultaneously recovered, the distance between the upper stratification and the adjacent lower stratification should not be less than 15m ;
5. The mining should be carried out from the side of the ore to the patio; when the mining is close to the patio, the stratified veins or veins should be connected to the other courtyard within the stratification; after the mining is completed, the reinforced concrete should be laid at the patio opening. top;
6. When mining the first layer, a false roof should be laid on the bottom plate. The buffer layer above the false top should not be less than 4m , and a buffer layer of 20m or more should be gradually formed ;
7. When the false top is collapsed, the pillars shall not be withdrawn by the felling method, and the personnel shall not stay in the adjacent access roads; when the first layer is mined, the pillars shall not be withdrawn; the gently inclined ore bodies whose roof cannot be collapsed naturally in time, Forced topping shall be carried out; when the false top landing is blocked, the stratification shall not be continued; when the roof falls to create voids, it shall not be operated in the adjacent or lower part of the roadway.
SanLand comprise a complete line of advanced-technology jet energy mills designed to grind any type of crystalline or friable material, producing product in the size range of 0.5 to 44 microns. SanLandmills handle materials as diverse as talc and diamonds, operating to precise specifications with little or no contamination or attritional heat.
Optimal feed material milling and grinding solutions
Carefully crafted to meet your milling and grinding needs, our robust and well-designed solutions are highly adaptable for a range of feed materials. With compact layouts, long-lasting wear parts and easy access for maintenance, you can save on civil, operation and maintenance costs.
Milling Equipment,Ball Mill For Grinding,Cement Ball Mill,Industrial Ball Mill
Shenyang Sanland Mining Equipment Manufacture Co., Ltd. , https://www.sanlandcrushers.com