Overhand shrinkage spaced-loading split-blasting slot cutting method

Abstract

The invention discloses an overhand shrinkage spaced-loading split-blasting slot cutting method, which aims at solving the problems that the ore discharging efficiency is low, the consumption of explosive is large, the rate of large ore blocks is high, the construction organization is complicated, a suspended roof is likely to form and the operation safety is poor in a traditional slot cutting process. The method comprises the following steps of step 1, determining geometric parameters of a cutting level; step 2, determining a position of a cutting open yard, to be specific, determining the parameter and height of a cross section, and selecting the position; step 3, determining rock drilling parameters in the slot cutting process, to be specific, determining the parameter of a resisting line, determining the hole-bottom distance parameter and determining side, hole and corner; step 4, forming a cutting slot; and step 5, discharging from the ore in a concentrating manner, wherein after the rearmost rows of blast holes in the uppermost layer of the cutting slot are exploded in an elementary error manner, ores falling into the cutting slot are concentratedly discharged through a first layer. By adopting the method for preserving the ores and finally discharging the ores concentratedly, the slot cutting can be safely and rapidly carried out for a chamber at the high quality.

Description

technical field [0001] The invention belongs to the technical field of underground mines, and relates to a method for forming cutting grooves by using medium and deep holes in the mining process of underground mines. Background technique [0002] Cutting trough is one of the most critical technological links in the mining process of underground mines. It is an essential project before mining the ore body. It is an important project for excavation to create the initial free surface for the initial mining work and provide compensation space for the caving ore after blasting. . The completion of the cutting work marks the end of the mining work and the beginning of the mining work, which plays a key role in linking the past and the future. The quality of cutting and pulling grooves is not only related to whether the mining of the stope can be carried out normally, but also affects the length of the stope recovery cycle and ultimately determines the production capacity of the s...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an upward ore-reserving interval-charged blasting and slotting method to solve the problems of low ore extraction efficiency, high explosive unit consumption, high ore large block rate, and construction organization problems existing in the traditional cutting and slotting process. Complicated, the pull groove is prone to the problems of suspended roof and poor operation safety

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