Open stope mining method for steeply inclined vein ore body

Abstract

The invention discloses an open stope mining method for a steeply inclined vein ore body. The open stope mining method comprises the steps that a stope is arranged in the moving direction of the ore body, a plurality of rock drilling roadways are formed, the rock drilling roadways are arranged in parallel along a vein at equal intervals in the vertical height direction of the stope, a stope preparation well is formed in the middle of the stope, the widths of the rock drilling roadways and the stope preparation well are consistent with the mining width of the stope, and top columns and studs are reserved in the stope; and the rock drilling roadways and the stope preparation well are used as blasting free faces, and multi-free-face blasting and overall area caving of the ore body in a chamber are achieved. By the adoption of the mining method, mining operation is conducted in the rock drilling roadways, the rock drilling roadways are good in stability, safe and reliable, surrounding rock caving hazards of the stope can be avoided, the operation environment is improved, and the operation safety coefficient is increased; and according to the mining method, the rock drilling roadways and the stope preparation well are used as the blasting free surfaces, the multi-free-surface blasting area is integrally caved, the whole stope is completed through one-time blasting, and the production capacity of the stope is greatly improved.

Description

technical field [0001] The invention relates to the technical field of steeply inclined ore body mining, in particular to an open-field mining method for steeply inclined vein-shaped ore bodies. Background technique [0002] The steeply inclined thin ore body refers to the ore body with a dip angle greater than 55° and a thickness between 0.8 and 4m. Such deposits occupy a certain proportion in ferrous, non-ferrous, chemical and gold mines, among which tungsten, tin and gold mines are the majority. At present, the shallow hole retention method is one of the main mining methods for mining such veins in China. According to statistics, in the mining methods of tungsten mines and gold mines, the proportion of medium and shallow hole retention method is as high as 70%, and the proportion of non-ferrous metal underground mines is as high as 38%. [0003] The mining process of the shallow hole ore retention method is as follows: [0004] The stope is arranged along the direction...

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Problems solved by technology

[0008] The shallow hole ore retention method is adopted. Due to the low degree of mechanization of rock drilling, powder charging, and crushing during the entire mining process, the labor intensity is relatively high, and the workers work directly under the exposed surface of the ore after blasting. The ore body and roof enclosure The slab side falls, and the safety factor of the operation is low; in addition, due to the limitation of the mining width, inclination angle and working space, the production capacity of the mining method often depends on the capabilities of the rock drilling equipment and the mining equipment, and the shallow hole retention method generally adopts Hand-held rock drills are used for rock drilling, self-weight or electric raking, and the production capacity of a single stope is limited, generally only 40-60t / d

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