High Stress Induced Blasting Blasting Method in Deep Stope

Abstract

The invention discloses a method for high-stress induced blasting and collapse in a deep stope, which includes 1) obtaining the stress distribution of the ore rock in the deep stope and its evolution law during the mining process; 2) taking the bottom cutting project as the first step of mining; 3 ) Divide the blasting mining area; 4) Calculate the stress density value of each divided zone, and select the first mining zone I for mining based on the premise that the technology is feasible; 5) Optimize the blasting parameters for the selected first mining zone I; 6) Complete the mining in the first mining zone I, which is the second step of mining. 7) After the first mining area I is completed, a new excavation area is formed in the deep stope. The stress field cloud map II of the new excavation area is re-obtained, and the stress field cloud map II of the new excavation area is divided into regions. Then repeat steps 4) to 6) until the entire deep stope is mined. Through this method, we can achieve the purpose of safe and efficient production in deep stopes, improve blasting effects, reduce mining costs, and improve the economic benefits of mine production.

Description

technical field [0001] The invention relates to the technical field of mining blasting, in particular to a high-stress-induced blasting ore collapse method in a deep stope. Background technique [0002] With the increase of people's demand for mineral resources and the continuous increase of mining intensity, the shallow mineral resources existing on the surface are increasingly consumed, and more and more underground mines at home and abroad have entered the stage of deep mining. One of the characteristics is high ground stress. Both excavation and mining are completed under high stress conditions, and the deep stope ore rock mass is in a relatively high ground stress environment. Relevant studies have shown that when blasting ore collapse is carried out in deep stopes, the damage of ore is the result of the joint action of static in-situ stress and super-dynamic stress produced by explosive explosion. The existence of high in-situ stress affects the crack initiation direct...

AI Technical Summary

Problems solved by technology

Therefore, this simple design and construction method of adjusting the parameters of the hole network and the amount of explosives cannot adapt to the complex and changeable characteristics of the high stress field of deep ore rocks, and lacks a theoretical basis, and the application effect in actual mine production is not good.

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