A low-dilution mining method suitable for gently inclined thin ore bodies

Abstract

The invention provides a low dilution mining method suitable for a flat and thinner orebody. A plurality of stopes are arranged along the trend of the orebody, and each stope corresponds to a to-be-mined chamber; the height of an initial mining layer of each chamber is 5 m, and the layer is mined by means of an open-stope method, after initial layer is mined, a jacking plate is supported by usinga low permeation supporting structure, and after the initial layer of each chamber is mined, the to-be-mined area in the bottom of the chamber is exploded by fan-shaped middle depth; after explosion,a shoveling and loading operation is carried out by means of a carry-scraper and a trackless transport vehicle, spallation rock strata on the upper part are reduced continuously, and the ground pressure is managed by means of the spallated ores, and the ground pressure of the jacking plate is managed by means of a filling body between the low permeation supporting structure and the jacking plate of the chamber. By designing a stope structure parameter of a relatively great dimension in the thin orebody, managing the ground pressure of the jacking plate by means of the spallated ores and the filling body and drilling the ores by means of a drill jambo and discharging the ores by means of the carry-scraper, a mining mode of a scaled operation is achieved, and the labor productivity is improved.

Description

technical field [0001] The invention relates to an underground mine mining method, in particular to a low-dilution mining method suitable for gently inclined thin ore bodies. Background technique [0002] The gently sloping thin ore body is a type of ore body form widely existing in nature, but due to its special ore body occurrence conditions and the difficulty in using large-scale and mechanized mining methods in limited and narrow underground spaces, it has always been a problem. It is a kind of refractory mining body with high labor intensity and low production efficiency. In the traditional caving mining method, generally speaking, the section height is high, and the ore is dropped by means of medium and deep hole blasting. However, due to the too small inclination of the ore body, the traditional caving mining method can easily cause the waste rock to be caved and mixed into the ore. As a result, the dilution rate of ore is too large, and due to the current limitation...

AI Technical Summary

Problems solved by technology

[0002] Gently inclined thin ore body is a kind of ore body shape that exists widely in nature. However, due to its special ore body occurrence conditions and the difficulty of using large-scale and mechanized mining methods in the limited and narrow underground space, it has always been a Difficult-to-mining ore bodies with high labor intensity and low production efficiency

The traditional caving mining method generally has a high segmental height, and the ore is dropped by means of medium and deep hole blasting. However, due to the small inclination angle of the ore body, the use of the traditional caving mining method can easily cause waste rocks to be caving and mixed into the ore. The dilution rate of the ore is too large, and due to the restrictions of the current laws and regulations in our country, the traditional caving mining method has gradually faded out of the field of vision in the engineering field, and the filling mining method is mostly used instead.

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