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A construction method of quasi-conical energy-gathering cut

A construction method and quasi-conical technology, which is applied in the direction of earthwork drilling, mining equipment, tunnels, etc., can solve the problems of low blasthole utilization rate, unfavorable construction, cumbersome operation, etc., and achieve high blasthole utilization rate, high cutting efficiency, The effect of easy operation

Active Publication Date: 2021-06-25
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a kind of quasi-conical energy-gathering cutting construction method, solve the problem that the rock in the cutting area in the oblique eye cutting and straight eye cutting in the prior art is obviously sandwiched, and the energy utilization of the cutting explosive is not concentrated. The utilization rate of the blast hole is low, the operation is cumbersome, and it is not conducive to the construction

Method used

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  • A construction method of quasi-conical energy-gathering cut
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  • A construction method of quasi-conical energy-gathering cut

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Embodiment 1

[0043] like Figure 2-4 As shown, there is one central hole, and the central hole is located directly below the intersection of the centerline of the roadway and the arch line, and the cut holes are arranged symmetrically along the center of the central hole. Preferably, the diameter of the central hole is larger than 100mm. When adopting large-diameter empty hole, can not charge medicine. The center hole is drilled with a special drilling rig, and the depth of one drilling can be used for 5-6 cycles.

Embodiment 2

[0045] like Figure 5-7 As shown, the difference from Embodiment 1 is that there are multiple central holes in this embodiment, and the center of the shape surrounded by the central hole is located directly below the intersection of the centerline of the roadway and the arch line, and the cutout The holes are arranged centrally symmetrically along the center of the shape surrounded by the central hole. Preferably, four central holes are provided, and the central holes are surrounded by a rhombus or a rectangle, and two of the central holes are located directly below the intersection of the central line of the roadway and the arch line. Specifically, the four central holes in this embodiment are all arranged perpendicular to the working surface, and the central holes can also be arranged in different shapes according to actual needs.

[0046] The invention provides a quasi-conical energy-gathering cutting construction method. A central hole and multiple groups of cutting holes...

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Abstract

The invention relates to the technical field of rock roadway excavation, and discloses a quasi-conical energy-gathering cutting construction method, which includes: setting a central hole below the intersection of the center line of the roadway and the arching line, and multiple groups of cuttings arranged symmetrically along the center of a certain point. Slotted hole, and the central hole is vertically set to the working surface, and the cut hole is oblique to the working surface. The invention provides a quasi-conical energy-gathering cutting construction method. A central hole and multiple groups of cutting holes symmetrically arranged along the center of a certain point are arranged below the intersection of the center line of the roadway and the arching line, and the center hole and the working surface It is vertically set, the cutting hole is obliquely intersected with the working surface, and the special cutting energy-concentrating medicine roll is installed in the cutting hole. The quasi-conical energy-gathering cutting construction method of the present invention is applied to rock roadways, especially hard rock roadways, and has high cutting efficiency, high blasthole utilization rate, simple operation and favorable construction.

Description

technical field [0001] The invention relates to the technical field of rock roadway excavation, in particular to a quasi-conical energy-gathering cutting construction method. Background technique [0002] The excavation time of drilling and blasting rock roadway in my country hovers at the level of 70m / month, which leads to unbalanced mining and seriously restricts the continuous production of coal mines. The development of rock roadway excavation construction technology is very important to improve the level of rock roadway excavation and alleviate the contradiction of mining. 90% of rock roadways in my country are constructed by drilling and blasting method. Low cost, high cost. The drilling and blasting method is a mature technology and low cost, and it occupies a dominant position in rock roadway excavation. Cutting technology is the most important thing in rock roadway drilling and blasting. At present, with the continuous increase of blasthole depth, the clamping eff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D3/04F42D1/00E21D9/00
CPCE21D9/006F42D1/00F42D3/04
Inventor 张召冉杨仁树许鹏陈华义岳中文付书俊范军平杨小军郭盛华左进京陈程丁晨曦
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY
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