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Winze top-breaking blasting method

A technology of sliding wells and detonating cords is applied in the field of top blasting for forming wellheads, which can solve problems such as blind shots, wellhead blockages, and uneven rock fragmentation.

Active Publication Date: 2013-04-03
青海大柴旦矿业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the process of roof-breaking blasting, blind shots are prone to occur, and uneven broken rocks caused by uneven fragmentation of rocks will be stuck in the shaft of the slide shaft, resulting in blockage of the wellhead. In addition, it is easy to form V-shaped "bell mouth", thus increasing the workload of wellhead support

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  • Winze top-breaking blasting method
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  • Winze top-breaking blasting method

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Embodiment Construction

[0019] Hereinafter, the chute roof breaking blasting method related to the present invention will be described in detail with reference to the accompanying drawings.

[0020] At first, when utilizing the deep hole layered blasting method to blast other parts of the chute other than the top layer, the existing deep hole layered blasting method is utilized. When implementing the deep-hole layered blasting, the distribution of blast holes and figure 2 the same, for example at slightly greater than 4m 2 There are 13 deep holes used as blastholes in the cross-section of the chute, and these 13 blastholes are arranged in 5 rows at equal intervals, and 3 blastholes are arranged at equal intervals on the 1st, 3rd, and 5th rows. In the 2nd and 4th rows, there are 2 gun holes symmetrical to the center line of the chute. Among them, the 8 blastholes arranged on the diagonal line except the central intersection are used as charging holes, and the remaining 5 blastholes are used as comp...

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Abstract

The invention relates to a winze top-breaking blasting method. The method comprises the following steps: drilling a plurality of blast holes in the cross section of a winze; setting a preset number of the blast holes as explosive-charged holes for charging explosive; charging the explosive-charged holes with the explosive, simultaneously laying full hole detonating cords in the entire holes of the explosive-charged holes, and laying non-electric millisecond delay detonating cords outside the explosive-charged holes; and simultaneously detonating the explosive in the explosive-charged holes ina non-delay simultaneous initiation mode. The winze top-breaking blasting method solves the problem of misfire which can be easily caused in the prior method, and the specifications of the shaped winze mouth can meet the design requirement at a time, thereby greatly reducing the workload for installing winze mouth supports.

Description

technical field [0001] The invention relates to a blasting method for breaking the roof of a chute, more specifically, to a method of blasting the roof for forming a wellhead in the process of excavating a vertical chute by using the deep hole layered blasting technology. Background technique [0002] In the construction of the vertical chute, the deep-hole layered blasting technology is generally adopted, that is, after all the parallel blast holes in the chute are drilled in the designed section, the well is formed by blasting in layers from bottom to top, so as to achieve the blasting of the chute. design requirements. In the deep hole layered blasting process, the blasting technology of the last layer, that is, the breaking of the top layer of the blasting chute, is the key process for forming a deep hole well. [0003] figure 1 It is a schematic diagram showing the existing chute top-breaking blasting method; figure 2 It is a schematic diagram showing the distributi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D3/04F42D1/08
Inventor 路文智马维清吴宝峰王清河乔冠中
Owner 青海大柴旦矿业有限公司