Mechanized mining technology of refractory ore body

Abstract

The invention discloses a mechanical stopping process for hard-to-mine ore bodies. The mechanical stopping process comprises the following steps: firstly, designing a rock drilling ore removal underground chamber with the height of 2.8 m-3 m and the width of 3 m at the bottom of a stope; then upwardly drilling blast holes with the diameter of 51 mm in the rock drilling ore removal underground chamber to the boundary of the stope, with the minimum resistance line of 1.3 m, the hole mouth distance of 0.5 m-0.9 m and the hole bottom distance of 1.4 m; after drilling all blast holes, performing fractionated powder-loading of all rows of deep holes in the rock drilling ore removal underground chamber by adopting a small-sized powder-loading trolley, as well as fractionated backing ore caving. By the adoption of the mechanical stopping process for hard-to-mine ore bodies, the stope preparation requirement of the whole sill pillar stope can be satisfied through one-step excavation, so that the stope preparation efficiency is improved; after excavation of drilling laneways, a set of novel efficient rock drilling equipment is adopted to replace hand drilling excavation, and all blast holes are constructed in one step, so that the drilling efficiency is improved; the backing lateral ore caving is adopted, and a remote-control carry scraper and a remote-control crushing trolley are used together for ore removal, the safety and the production efficiency are greatly improved, and the production capacity of the stope can reach more than 150 t / d.

Description

technical field [0001] The invention belongs to the technical field of mine mining, and relates to a mechanized recovery process of a difficult-to-mine ore body by selecting a suitable stope at the bottom pillar of an upper difficult-to-mine ore body. Background technique [0002] The applicant is located about 48km northeast of Shaoguan City, Guangdong Province. It is a large-scale lead and zinc production base in my country and a national first-class enterprise. At present, the production capacity of the mine has changed from 40×10 4 t / a, developed to 160×10 4 More than t / a, the mine has a daily output of 5,000-5,500 tons of lead-zinc ore and an annual production capacity of 170,000-180,000 tons of lead-zinc metal content. It is one of the largest lead-zinc mining and dressing enterprises in my country's nonferrous metal industry. [0003] As a non-renewable resource, minerals occupy a very important position in social and economic development. my country has a wide var...

AI Technical Summary

Problems solved by technology

[0007] At the same time, in order to meet the needs of the 180,000-ton expansion of the Fankou lead-zinc mine, balance regional mining, increase the mining volume of the upper middle section, and reduce the lifting pressure of the lower middle section of the ore body; for the original mining method, there are disadvantages such as low production efficiency, high labor intensity, and poor safety.

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