Two-step sublevel open-stop and delayed filling mining method

Abstract

The invention discloses a two-step sublevel open-stop and delayed filling mining method. The two-step sublevel open-stop and delayed filling mining method comprises the following steps: (1) dividing a mineral body into mineral blocks along the moving direction, dividing the mineral blocks into studs and mineral chambers, and carrying out stud accurate cutting and mineral chamber accurate cutting; (2) recycling the studs, and carrying out delayed high strength cemented filling; and (3) recycling the mineral chambers, and carrying out delayed waste stone or tailing filling. According to the two-step sublevel open-stop and delayed filling mining method, the advantages of a sublevel open-stop and delayed filling method of a flat base structure and a conventional two-step filling mining method applied to thick mineral bodies are synthesized, so that the problem of productivity, filling and safety in the mining process of pitched and heavy-pitched intermediate-thick mineral bodies are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, and is a two-step, segmented emptying and subsequent filling mining method, which is suitable for inclined and steeply inclined medium-thick ore bodies and has high ore value. Background technique [0002] In a certain antimony mine in Tibet Autonomous Region of my country, the average dip angle of the ore body is 53°, and the average thickness is 13m. Volcanic tuff, limestone, and surrounding rock are relatively hard, but joints and fissures are relatively developed in some sections, and the stability is medium. This kind of metal ore has a high value, with an average value of RMB 1,500 per ton of raw ore, so it is considered to use the filling method for mining. [0003] According to the situation of this mine, the conventional filling mining methods include the mechanized upward horizontal layered filling method, the conventional segmented open field subsequent filling method and th...

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Problems solved by technology

[0004] The mechanized upward horizontal layered filling method has the following disadvantages: (1) self-owned equipment (drilling jumbo, scraper) is used for mining work, which requires the excavation of slopes, and the amount of mining and cutting is relatively large; (2) shallow hole drilling is used (3) The overall cemented filling strength is high, the process is complicated, and the filling cost is high; (4) Workers work under the exposed roof of the stope, which has low safety and reliability

This method has small loss and dilution and high recovery rate, but the overall cemented filling strength is high, the process is complicated, and the filling cost is high, and it is only suitable for thick and large ore bodies, and medium-thick ore bodies cannot be used

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