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Roadway tunneling variable-diameter slotting structure and method

A technology of roadway and cutting hole, which is applied in the field of rock drilling and blasting in mines, can solve the problems of unsatisfactory cutting effect, irregular cutting and blasting contour, large unit consumption of cutting and blasting explosive, etc. The effect of reducing the number of charging holes and improving the efficiency of energy consumption

Active Publication Date: 2021-04-02
DAYE NONFERROUS METALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to propose a roadway excavation variable-diameter cutting structure and method, aiming at solving the problem of large unit consumption of the existing cutting blasting explosives and cutting Irregular blasting contour and unsatisfactory cutting effect

Method used

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  • Roadway tunneling variable-diameter slotting structure and method
  • Roadway tunneling variable-diameter slotting structure and method
  • Roadway tunneling variable-diameter slotting structure and method

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Embodiment Construction

[0030] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indications are only used to explain how to move in a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated.

[0032] The present invention proposes a roadway excavation variable-diameter cutting structure and method, figure 1 and figure 2 It is a schematic diagram of an embodiment of a variable-diameter cutting structure for roadway excavation proposed by...

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Abstract

The invention discloses a roadway tunneling variable-diameter slotting structure and method. The roadway tunneling variable-diameter slotting structure comprises a central slotting hole, a plurality of auxiliary slotting holes, a plurality of empty holes, a plurality of auxiliary holes, a plurality of peripheral holes and a plurality of bottom edge holes, wherein the central slotting hole is positioned in the middle of a roadway tunneling operation surface, the connecting lines of the plurality of auxiliary slotting holes are arranged in a rhombus shape and distributed on the periphery of thecentral slotting hole, the plurality of empty holes are distributed in the middle positions of the connecting lines of every two auxiliary slotting holes, the auxiliary holes and the peripheral holesare sequentially distributed around the auxiliary slotting holes, and the bottom edge holes are distributed in the bottom of the roadway tunneling operation surface. According to the technical schemeprovided by the invention, through the multi-aperture combined reducing slotting structure, the two-section blasting of the slotting holes is realized, by arranging the empty holes, the auxiliary holes, the peripheral holes and the bottom edge holes and reasonably forming the blast holes, high-efficiency and low-unit-consumption slotting is realized, a regular slotting outline is formed, and the slotting efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of rock drilling and blasting in mines, in particular to a roadway excavation variable-diameter cutting structure and method. Background technique [0002] When excavating roadways in relatively broken rock bodies, the drill and blast method is often used, and the cutting construction is the core process of the drill and blast method. The general cutting methods include straight barrel cutting (including parallel crack cutting, corner column cutting, spiral cut) and wedge-shaped cut, but in the process of implementation, there are problems such as complex cutting parameters, which are not conducive to engineering applications; large blasting vibration of cutting; complex cutting contour, which is not conducive to the layout of subsequent caving holes and surrounding holes, etc. . [0003] Patent CN201910693731.1 discloses a diamond-shaped large-diameter hollow hole straight-hole cutting structure and the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D3/04
CPCF42D1/00F42D3/04
Inventor 周科礼熊国雄徐喜尹东升戴宏辉成涌刘东锐李强周益龙张为星刘奇
Owner DAYE NONFERROUS METALS
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