A Mining Method of Narrow Ore Body High Stage Subsection Collapse and Subsequent Filling

Abstract

The invention discloses a mining method for narrow ore body high-stage segmental collapse followed by filling. On the basis of using the original roadway, the lower middle section of the middle hole pulls the bottom layer and the lower middle section of the lower middle section of the large diameter deep hole layered blasting layer is sequentially constructed from bottom to top. , Large-diameter deep hole layered blasting layer in the upper middle section, after the construction of cutting deep hole raises is completed, and the stope is ready for blasting and mining conditions, start to pull the bottom layer with middle hole in the lower middle section, and blast the layered blasting layer blasting with large diameter deep hole in the lower middle section. At the end of the simultaneous mining blasting of the double lower middle section, a free surface is created for the layered blasting layer of the large-diameter deep hole in the upper middle section. Adopting the technical scheme, the design is reasonable, safe and efficient, the mining process in the upper middle section is simplified, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of mining engineering, in particular to a mining method for narrow ore body high-stage segmental collapse followed by filling. Background technique [0002] In my country's mine safety production, the VCR (large-diameter deep hole rock drilling blasting followed by filling) mining method has become a very complete mining method, and its mining volume has accounted for more than 60% of the underground mining volume. The biggest feature of this method is : The blasting effect is improved, the operating efficiency is improved, and the danger caused by the sheet state is minimized or even eliminated. [0003] After adopting the VCR mining method to mine a middle section, if you want to mine the upper middle section of the stope, you must re-excavate the ore exit after the filling is completed, and the upper middle section must have a corresponding ore supply shaft, which increases the amount of mining and cutting...

AI Technical Summary

Problems solved by technology

[0003] After adopting the VCR mining method to mine a middle section, if you want to mine the upper middle section of the stope, you must re-excavate the ore exit after the filling is completed, and the upper middle section must have a corresponding ore supply shaft, which increases the amount of mining and cutting. , resulting in difficulty in mining in the upper and middle sections, and a long mining cycle. Therefore, we design a narrow ore body high-stage segmental collapse and subsequent filling mining method

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