Efficient precise blasting method of extremely-thin ore

Abstract

The invention discloses an efficient precise blasting method of extremely-thin ore and belongs to the field of mining. The efficient precise blasting method includes: step 1, arranging rock drilling engineering: when an inclination angle of the ore is less than or equal to 30 degrees, tunneling and drilling in a direction perpendicular to the forming direction of the ore, and when the inclination angle of the ore is greater than 30 degrees, arranging a sectional drilling roadway along the forming direction of the ore; step 2, arranging blasting holes: arranging a plurality of blasting holes along two sides of the ore, wherein the blasting holes and a central line of the roadway form an included angle of 40-60 degrees, and the blasting holes include lateral blasting holes and middle blasting holes; step 3, charging explosive: adopting a gradient charging structure matched with a blasting resistant line in size to charge each blasting hole with the explosive for blasting; step 4, detonating: according to stable state of top and bottom plates of ore rock, selecting all blasting holes to be detonated for blasting according to a set sequence. By using the method, production capacity can be increased, mining and cutting engineering quantity can be reduced, dilution rate can be lowered, and precise blasting control in limited space can be realized; the efficient precise blasting method is brand new, deep-hole efficient blasting is adopted, and only ore is stopped while surrounding rock is not damaged.

Description

technical field [0001] The invention relates to the field of mining, in particular to a high-efficiency fine blasting method for extremely thin ore bodies. Background technique [0002] The mining of extremely thin ore bodies is a technical problem in the mining industry worldwide. Ultra-thin ore veins are widely distributed in my country's non-ferrous metal and gold mines, and occupy a certain proportion. At present, the mining methods of this type of ore body can be divided into two categories, namely mixed mining and separate mining. Mixed mining is to mine ore and surrounding rock together, and separate mining is to mine ore and surrounding rock separately. The mixed mining category is based on simplifying the mining process and increasing the mining intensity; the separate mining category focuses on reducing the ore dilution rate. The mixed mining methods are mainly shallow hole ore retention method and comprehensive method; the separate mining methods mainly include ...

AI Technical Summary

Problems solved by technology

[0004] Based on the problems existing in the above-mentioned prior art, the present invention provides a high-efficiency fine blasting method for ultra-thin ore bodies, which can realize precise control and large-scale operation of ultra-thin ore body blasting, and effectively solve the current blasting accuracy of ultra-thin ore bodies. Poor and inefficient problems

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