A mining method for thick and large ore bodies

Abstract

A mining method for thick and large ore bodies, comprising the following steps: a stope is arranged vertically in the direction of the ore body, divided into stages on the vertical height, a mining quasi-raise is arranged in the center of the stope, and an annular transport road with a cutting trench ore structure is arranged at the bottom of the stope , the lifting chamber is arranged on the top of the stope; the down-the-hole drilling rig drills annular horizontal deep holes from both sides of the patio, concentrates rock drilling, blasts in stages, strengthens the ore extraction, and then fills. The invention has the advantages of less mining and cutting engineering, high degree of mechanized operation, high production efficiency, large production capacity, no need for personnel to enter the stope for operation, and good safety conditions.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a method for mining thick and large ore bodies. Background technique [0002] Thick and large ore bodies are usually mined by VCR method, segmented open field method or upward layered filling method. When VCR is used for mining, the large-diameter deep hole is constructed downward through the rock drilling chamber in the upper stope. The rock drilling equipment adopts ROC-306 type DTH drilling rig, KYD-200 type underground cone drilling rig and special equipment for Simba 261 type DTH drilling rig. etc.; manual loading of powdered ammonium nitrate explosives or emulsion explosives, and the caving ore is extracted from the bottom structure by a scraper. Generally, the mine house adopts VCR flank, and the columnar charge pack collapses on the side of the ladder section. The technical level of slot blasting is quite high, and this method has high requirements on the regularity of o...

AI Technical Summary

Problems solved by technology

When the segmented open-field method is used for mining, the segmental height is generally 10-12m. The rock drilling equipment generally adopts the YGZ-90 rock drill, and the power consumption or the scraper is used to extract the ore. Insufficient field production, etc.; layered filling mining method is a mining method in which layered mining and layered filling are carried out sequentially from top to bottom, and operations are carried out under the protection of layered artificial roof protection. Since operators must enter the stope , many operating links, complex mining process, resulting in poor safety conditions, low production efficiency, high labor intensity, high mining cost, small mine production capacity and other deficiencies

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