The mining layout of the downward stratified filling method (Fig. 1) is mainly selected according to the ore body shape, equipment, mining conditions and the stability of the rock. There are three commonly used methods: intra-pulse acquisition, extra-pulse acquisition, and intra-pulmonary combined detection. Intrapulse mining: suitable for medium and small steep ore bodies and pillars with stable ore bodies than surrounding rock. The electric picking is used for mining, and the hand-held rock drill is used for rock drilling. The stage height is 40 to 80 m. In the layered roadway, in order to facilitate the discharge of electric rafts, an in-pulse chute is arranged every 30 to 40 m, and a ventilated pedestrian well is arranged. The soft ore of the ore must be lined with steel or concrete.
Under a plain gold ore DEPOSIT FIG scraper hierarchical scheme to cemented filling method
1-ventilated patio; 2-in-situ chute; 3-external chute; 4-slope track;
5-maintenance chamber; 6-layered roadway; 7-way; A 1 - rich ore; A 2 - lean ore
Extra-pulse mining: suitable for thick ore bodies, the surrounding rock is more stable than the ore body. The use of trackless mechanized mining, excavation of ramps, sectioned roadways, slipways, and stratified links on the upper or lower deck of the ore body. The slip hole spacing is 50-100m, and the segment height is 9~12m. The filling material is piped.
In-pulse and internal-combination: On the basis of the external sampling, in order to shorten the transportation distance, an in-pulse slippery well is added to improve the mining efficiency of the stope.
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Zinc Alloy Die Casting of Sanitary Ware
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