Oblique throwing blasting mining method for gently-inclined thin ore body

Abstract

The invention provides an oblique throwing blasting mining method for a gently-inclined thin ore body. The oblique throwing blasting mining method for the gently-inclined thin ore body comprises the following steps that structure parameters of an ore block stoping unit are determined, a stope is arranged in the direction of the ore body, two mining preparation upward-inclining roadways communicating the upper, middle and lower sections are arranged in the stope, and the upward-inclining roadways are arranged in spacer pillars; cutting roadways are sequentially constructed between the two upward-inclining roadways from a bottom pillar to a top pillar of the stope; the oblique distance between the center line of the first cutting roadway and the bottom pillar is 2.5 m, and the oblique distances between the center lines of the subsequent cutting roadways and the bottom pillar are 5 m; stoping starts from the first cutting roadway, backward stoping is adopted, and two controlled blasting methods including oblique pre-splitting blasting and throwing blasting are adopted in order to reduce dilution and loss; after stoping of the first cutting roadway is completed, wooden walls are erected on two sides of the spacer pillars and cementing filling is conducted; after a filling curing period is finished, the second cutting roadway is stoped upwards, and the same stoping process is adopted; and stoping is sequentially recycled until stoping of a mining room is finished. The oblique throwing blasting mining method for the gently-inclined thin ore body is safe, efficient and low in loss, and the loss of mineral resources is reduced.

Description

technical field [0001] The invention belongs to the technical field of mining, and relates to a mining method for a gently inclined thin ore body. This method is mainly applicable to the recovery of gently inclined thin ore bodies in underground gold mining. Background technique [0002] In the mining of gently inclined thin ore bodies, due to the thin thickness of the ore body, it is easy to cause the dilution rate to be too large during the mining process, resulting in a serious decline in ore quality, low ore grades, and high mining costs. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an oblique throwing blasting mining method for gently inclined thin ore bodies, so as to realize safe, efficient, low-cost and low-loss mining of gently inclined thin ore bodies. [0004] Technical scheme of the present invention is as follows: [0005] A kind of oblique throwing blasting mining method aimed at gently incline...

AI Technical Summary

Problems solved by technology

[0002] In the mining of gently inclined thin ore bodies, due to the thin thickness of the ore body, it is easy to cause the dilution rate to be too large during the mining process, so that the quality of the ore is seriously reduced, the ore grade is low, and the mining cost is high.

Images