Diagonal ore-break-down medium-length hole mining method for steeply-inclined thin vein ore body

Abstract

The invention discloses a diagonal ore-break-down medium-length hole mining method for a steeply-inclined thin vein ore body. The method comprises the following steps: arranging a stope according to the strike of the ore body, dividing rooms, pillars and sections according to the inclination direction of the ore body and arranging a level haulage roadway along the vein of the ore body from the footwall of the ore body; driving ore-drawing crosscuts into the ore body from where the level haulage roadway is located; horizontally arranging an undercutting roadway along the vein and parallely driving rock-drilling prospecting rises along slant height; arranging ore drop shafts to abut against the haulage roadway; starting stoping from one side of the stope, stopping stoping when the undercutting roadway is driven to the position of the first rock-drilling prospecting rise and then driving the rock-drilling prospecting rise; allowing a medium-length hole drilling machine to gradually travels from undercutting roadway to rock-drilling prospecting rise, drilling medium-length upward blast hole, carrying out denotation and drawing ore out from the bottom ore-drawing crosscuts; and after the first rock-drilling prospecting rise reaches a certain position, continuing driving the undercutting roadway until the position of the second rock-drilling prospecting rise is arrived at, carrying out medium-length hole mining, and repeating the above-mentioned operations until stoping of the stope is completed. The diagonal ore-break-down medium-length hole mining method has the advantages of high production efficiency, great production capacity and good operation security.

Description

technical field [0001] The invention relates to a mining method, in particular to a medium-long-hole mining method with pseudo-inclined ore falling in steeply inclined thin ore body veins. Background technique [0002] Steeply inclined thin ore bodies are often found in gold, tungsten and tin deposits. According to statistics, about one-third of non-ferrous, rare and precious metal ores come from such deposits. At present, the upward layered filling method and shallow hole ore retention method are commonly used for mining steeply inclined thin ore bodies. Due to the use of small hole rock drilling equipment, the amount of ore falling at one time is small, and the production capacity of steeply inclined thin ore bodies is not only low, but also labor intensive. High strength, high operating cost, etc. According to domestic and foreign mining experience, the effective way to achieve safe, efficient and economical mining of steeply inclined and thin veins is to increase the de...

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Problems solved by technology

[0003] According to the consultation, the patent document CN 102635356 A relates to a kind of deep-hole mining method with multiple blasting free surfaces in steeply inclined veins. Excavating and cutti

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