Novel 90-m high-middle-section fan-shaped deep hole stoping method

Abstract

The invention discloses a novel 90-m high-middle-section fan-shaped deep hole stoping method, and relates to the technical field of mining processes. The novel 90-m high-middle-section fan-shaped deep hole stoping method comprises the following steps: S1, rock drilling level stoping preparation is designed, a panel is divided into two chambers in the ore body trend, the two chambers are the first chamber and the second chamber respectively, and a rock drilling chamber is constructed in each chamber in the rock drilling level in the ore body trend. According to the novel 90-m high-middle-section fan-shaped deep hole stoping method, the stoping preparation work amount of the chambers is small, the mining cutting ratio is low, and the stoping preparation cost is low; the dilution rate of the chambers is low; the blasting lumpiness is uniform, the lumpiness rate is low, and the secondary crushing cost is low; the perforation amount is small, the perforation cost is low, damage of blasting to chamber sides is small, and the stability of the chambers is good; and meanwhile, compared with an original VCR mining process, one rock drilling chamber can be omitted for each chamber, about 50% of stoping preparation work amount can be saved, the perforation cost is reduced by about 3 yuan/t, and the direct cost of blasting, ore removal and secondary crushing is reduced by 2.5 yuan/t by adopting a fan-shaped deep hole stoping process.

Description

technical field [0001] The invention relates to the technical field of mining technology, in particular to a novel 90-meter high-middle section fan-shaped deep hole mining method. Background technique [0002] In the mining process, it is necessary to use blasting means for blasting operations. The rock drilling roadway is arranged at the lower part of the roof column of the mine house, and parallel or fan-shaped vertical deep holes are drilled downward to drop the ore. Drilling rigs are concentrated on one rock drilling level, the rock drilling tunnel layout is simple, easy to move and operate, and labor-saving in charging; but the hole is deep and large, prone to deviation, the blasting effect is poor, the rate of large blocks is high, and the damage to the ore pillar is also greater . In the 1970s, Canada applied high-pressure pneumatic down-the-hole drilling rigs and large-diameter deep holes, spherical charges, and a new technology for horizontal layering of downward f...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a novel 90m high-middle section fan-shaped deep hole mining method, which solves the problem that the existing VCR mining method will lead to low perforation utilization rate, waste of manpower, material resources and financial resources. It is impossible to remove the stones between the ore bodies, resulting in a high dilution rate. Due to the high dilution rate, the ore output from the mine is low, which will also affect the stable production of the concentrator, and will also lead to high mining costs. VCR mining Method When mining the gently inclined thin ore body at the high stage, the number of mine houses is large, and the mining period is long, which is not conducive to the problem of production organization

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