Fan-shaped medium-diameter deep hole mining technology of steeply inclined medium-thick ore body

Abstract

The invention provides a fan-shaped medium-diameter deep-hole mining process of a sharply inclined medium-thick ore body. In the upper part of the stope, there are transportation lanes along the vein and rock-drilling chambers; in the lower part, there are transportation lanes along the vein, the ore exit level roadway, the ore loading approach, and the bottom level roadway. Bottom and top cutting crossways are arranged correspondingly in the center or end of the stope, and cutting wells are excavated on the ore body to penetrate the bottom and top cutting crossways. Drill upward medium-deep holes in the bottom level entry and the bottom cutting cross entry, and blast to form medium-deep hole cutting grooves and V-shaped ore-receiving trenches. In the top cutting lane, arrange the downward-facing middle-diameter parallel and fan-shaped inclined deep holes, and blast to form the cutting vertical groove. Then take the cutting vertical groove as the free surface, along the direction of the mine house, blast the fan-shaped deep hole with a medium diameter from the bottom to the bottom of the rock-drilling chamber, and realize the lateral avalanche. The invention can use the upper and middle section of the ore-out level roadway to be changed into a rock-drilling chamber, and based on small-scale mining equipment, realize small row spacing and fan-shaped deep holes, so as to reduce mining and cutting projects, control ore collapse below 500mm, and realize high-efficiency mining.

Description

technical field [0001] The invention relates to the technical field of mining construction, in particular to a sector-shaped medium-diameter deep-hole mining process of steeply inclined medium-thick ore bodies. Background technique [0002] In domestic non-ferrous metal underground mining mines, most of the thick and large ore bodies adopt the large-diameter deep-hole stage open-field and then-fill mining method, such as Fankou lead-zinc mine, Anqing copper mine, Tonglushan copper mine, Ashele copper mine, etc. In ferrous metal mines, thick and large orebodies often use the large-diameter deep-hole stage open-field and then-fill mining method, such as Caolou Iron Mine, Lilou Iron Mine, Zhouyoufang Iron Mine, etc. To improve mining efficiency and reduce labor intensity, the only way is to increase the depth and precision of mining rock drilling to achieve high-efficiency mining at a high stage. [0003] Mining and cutting works are two necessary works in mining operations. ...

AI Technical Summary

Problems solved by technology

[0004] The traditional large-diameter deep hole stage open-field and subsequent filling mining method has the disadvantages of large rock drilling chamber (the span is about 2m wider than the mine house, and the height is about 3.6m), the cutting horizontal road is large, and the diameter of the blast hole is large (the drilling hole adopts a large diameter of 120mm). ~165mm, layout of vertical or parallel deep holes), large deviation of inclined holes, large blasting hole network parameters, large ore block after blasting, high requirements for rock drilling chamber support, and the upper part of rock drilling chamber needs to be reserved 8-10m thick It is only suitable for high-efficiency mining of thick and large ore bodies, not for high-efficiency mining of steeply inclined and medium-thick ore bodies.

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