Method for increasing single blasting groove broaching height of VCR mining method

A mining method and trough pulling technology, applied in blasting, ground mining, underground mining, etc., can solve the problems of low single trough height and low trough efficiency, and achieve the effect of solving low efficiency and eliminating clamping.

Active Publication Date: 2022-02-25
TONGLING NON FERROUS METAL GROUP CORP
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing VCR mining method has low slotting efficiency and a si

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  • Method for increasing single blasting groove broaching height of VCR mining method
  • Method for increasing single blasting groove broaching height of VCR mining method

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Embodiment Construction

[0016] The technical solutions in the present invention are clearly and completely described below in conjunction with the embodiments. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments without creative efforts by those skilled in the art fall within the protection scope of the present invention.

[0017] Such as Figure 1-2 As shown, a method for increasing the height of the single-shot blasting groove in the VCR mining method includes the following steps: (1) Drilling: use a drilling rig to drill a Ф165mm downward drilling, and the design parameters of the hole layout are: row spacing 3 meters, The vertical hole distance is 3 meters; there are 17 vertical pull slot holes, which are surrounded by a small quadrilateral 3, a middle quadrilateral 2 and a large quadrilateral 1 in cross section, and the small quadrilateral is located on one ...

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Abstract

The invention discloses a method for increasing the single blasting groove broaching height of a VCR mining method. The method comprises the steps that (1) drilling is conducted, specifically, a downward drill hole of phi 165 mm is drilled through a drilling machine; (2) charging is conducted; and (3) groove broaching is conducted, specifically, after two times of blasting groove broaching are conducted from low to high, side collapse blasting groove expanding is conducted once, and groove broaching blasting and side collapse blasting are conducted at the same time during top breaking blasting. The method has the beneficial effects that the problem of low groove pulling efficiency under the condition of no cutting courtyard is effectively solved, and the single-time groove pulling height is increased to 5 meters from the previous 2.5 meters.

Description

technical field [0001] The invention relates to the technical field of mining engineering, in particular to a method for increasing the height of a single-shot blasting slot in a VCR mining method. Background technique [0002] The rock-drilling roadway is arranged at the lower part of the roof column of the mine house, and the parallel or fan-shaped vertical deep holes are drilled downward; the drilling rigs are concentrated on one rock-drilling level, and the rock-drilling roadway is simple in layout, easy to move and operate, and labor-saving in charging; but the hole depth is large , prone to deflection, poor blasting effect, high block rate, and greater damage to ore pillars; in the 1970s, Canada used high-pressure pneumatic down-the-hole drilling rigs and large-diameter deep holes, spherical The new technology of horizontal delamination of the charge bag and the downward funnel is called the vertical deep hole downward funnel horizontal delamination stage mine method, ...

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Application Information

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IPC IPC(8): F42D1/00F42D3/00E21C41/16
CPCF42D1/00F42D3/00E21C41/16
Inventor 董世华姚道春汪令辉苏卫宏古绪球周贵斌潘敏王军盛欢张伟
Owner TONGLING NON FERROUS METAL GROUP CORP
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