Sublevel shrinkage caving stage open stope afterwards filling mining method

Abstract

The invention discloses a sublevel shrinkage caving stage open afterwards filling mining method. In the earlier stage of stoping, caved ores are utilized to support surrounding rocks on a top tray, and in the later stage of stoping, a goaf area is filled with fillers to control ground pressure so as to achieve safe and efficient mining. Ore blocks are mined in two steps, mining blocks in step two are stoped after the mining blocks in step one are stoped and filled. After the ores are completely let out, the goaf area is filled with the fillers to control the ground pressure. Because the stoping modes of sublevel ore caving, sublevel shrinkage, final ore drawing and empty area afterwards filling are adopted, the mining method has large one-time filling amount and low cost; the method adopts middle-deep hole drilling and blasting and carry scraper ore removal, and the device has high level and large production capacity; the method has the advantages of large production capacity of the sublevel caving method and the stage open stope method, high recovery rate of the filling method, and earth surface protection; the safety is good, and drilling, ore removal and other operations are all carried out in a sublevel drilling and ore removal approach roadway; and the ores can be removed in advance, and the ores can be removed partially after the first sublevel is ready.

Description

technical field [0001] The invention relates to the technical field of metal ore deposit back mining, and in particular provides a mining method combining a caving mining method with segmented ore retention and a stage-by-stage emptying and subsequent filling mining method. Background technique [0002] According to the ground pressure management method during mining, metal deposits are divided into three categories: open-pit mining method, filling mining method and caving mining method. The caving mining method has been widely used in metal mines and non-metal mines because of its low cost, high efficiency and safe operation. But its biggest defect is that the loss rate and dilution rate of ore are high, resulting in a large waste of mineral resources. The root cause of the high ore loss rate and dilution rate is the ore-drawing method of the cut-off grade under the overburden rock formation, and the ore rocks are heavily doped at the ore-drawing mouth. [0003] Since the...

AI Technical Summary

Problems solved by technology

This mining method has also been promoted to a certain extent in our country, but it cannot be used in some mines because the surface or the upper ore body needs to be protected, and the surface does not allow subsidence, etc.

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