Medium-diameter and deep-hole composite channeling technology for steeply inclined medium-thick ore body

Abstract

The invention provides a medium-diameter deep-hole composite fluting process for steeply inclined medium-thick ore bodies. In the middle section of the upper part of the mine house, arrange the top cutting cross road at the position perpendicular to the direction of the mine house; in the lower middle section corresponding to the position of the top cutting cross road, arrange the bottom cutting cross road. Then construct a cutting shaft on the hanging wall of the ore body with the same dip angle as the ore body and run through the top cutting and bottom cutting crossways. Drill upward medium-deep holes in the bottom cutting horizontal lane, take the cutting well as the free surface, and blast it to form the bottom-drawing cutting groove for the medium-deep hole. Arrange medium-diameter parallel inclined deep holes in the top cutting lane and around the cutting shaft on the hanging wall of the ore body; arrange medium-diameter fan-shaped inclined deep holes in the top cutting lane and the footwall of the ore body. Firstly carry out the medium-diameter parallel inclined deep hole blasting for breaking the well, and then carry out the medium-diameter fan-shaped inclined deep hole blasting to obtain a cutting vertical groove. The invention can reduce the width, length and exposed area of ​​the cutting lane to the greatest possible extent, and is more conducive to the self-stabilization of the cutting lane.

Description

technical field [0001] The invention relates to the technical field of mining, in particular to a medium-diameter deep-hole composite fluting process for 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 emptying and subsequent filling 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. The mini...

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Problems solved by technology

The disadvantages of this method are: first, the rock drilling equipment used is large, the exposed area of ​​the cutting road is large, the diameter of the blast hole is large (drilling diameter φ120mm~165mm, vertical or parallel deep holes are arranged), and the hole network parameters are 3~5m×3~4m , after blasting, there are problems such as large ore block size, large rock drilling chamber section, and high roadway support cost below medium stability; second, when the boundary of the ore body hanging wall is irregular and the cutting roadway is arranged close to the edge of the ore body hanging wall, It will increase the ore dilution and increase the ore processing cost; when the cutting roadway is far away from the edge of the ore body, the ore loss rate will increase. When the blasting process is complicated, the charge quality is high, and the quality of rock drilling and blasting is not good, it is easy to form a suspended roof. For this reason, the width of the flute must be appropriately increased and the blastholes should be encrypted, so the cost of fluting in the stope will be increased; It is suitable for high-efficiency mining of mines with thick and large ore bodies and large-scale mining equipment, but not suitable for high-efficiency mining of mines with steeply inclined medium-thick ore bodies and small and medium-sized mining equipment

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