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Uniparted hyperboloid coring and chambering rock-plug blasting method

A hyperboloid, core hole technology, used in drilling equipment and methods, blasting, earthwork drilling, etc., can solve the problems of lack of penetration, unable to meet the core and penetration of rock plugs, etc., to reduce the initial explosion pressure, reduce over crushing effect

Active Publication Date: 2017-08-11
NORTH CHINA BEIJING GUOYAN TECHN TESTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing rock plug blasting, the initial detonator section coring through blasting usually adopts a wedge-shaped coring method, but if the wedge-shaped coring extends symmetrically (from the inner or small mouth of the rock plug) to the outer or large mouth of the rock plug, the maximum hole density requires 12 or more holes are arranged vertically, and the hole density is higher than that of the hyperbolic arrangement. There is a possibility of two-way coring but no penetration mechanism, which cannot meet the needs of both coring and penetration of rock plugs.

Method used

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  • Uniparted hyperboloid coring and chambering rock-plug blasting method
  • Uniparted hyperboloid coring and chambering rock-plug blasting method
  • Uniparted hyperboloid coring and chambering rock-plug blasting method

Examples

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Embodiment 1

[0089] According to the existing Changdian project research, a large-scale rock plug blasting plan with a full row of holes and deep holes with a central pilot tunnel is adopted. Through the productive blasting test of the full-section rock plug in the water diversion tunnel, the medium pilot tunnel is constructed first, and the small rock plug is blasted when the rock plug is blasted. The blasting of parallel dense rows of holes (3 meters deep) first penetrated, the big rock plugs were blasted sequentially from the inside to the outside, and finally the construction blasting plan of smooth surface blasting of the surrounding holes was successful.

[0090] Jilin Yinsong can graft the hyperbolic technology to the Changdian technical solution, such as figure 1 As shown, the middle pilot hole is drilled and blasted every half meter from the outside to the inside, and the diameter is reduced step by step to form a symmetrical step-shaped adjustment, so as to facilitate the hyperbol...

Embodiment 2

[0096] According to the tunnel drilling and blasting construction calculation, the main hyperboloid surface equation of the 8-meter-thick pure hyperbolic rock plug blasting for the loosening case is:

[0097]

[0098] In addition, the following relevant technical requirements for the rock plug hyperbolic coring-through method of the present invention are provided.

[0099] 1. Ensure that the core of the rock plug is penetrated

[0100]In order to ensure the penetration of the single-leaf hyperbolic coring of the rock plug, the main hyperbolic coring body is strictly symmetrically arranged and blocked to ensure the symmetrical coring of the hyperbolic two directions. Rock plug coring should be charged at the upstream end according to the water head and self-weight increment, which can be increased by 20% to 30% according to the charge increment ratio of underwater blasting. Thickness; a more accurate expression is that the tensile shear strength of the rock mass in the bloc...

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Abstract

The invention provides a rotary uniparted hyperboloid coring and chambering rock-plug blasting method. The method comprises the steps that laser orientation drilling is conducted along at least one coring hyperboloid which is coaxial with a rock plug, and a levo / dextro linear generatrix of at least one chambering hyperboloid on the underwater or non-underwater rock plug, hyperbolic coring holes and chambered holes with high-precision linear generatrices are obtained, explosives are installed in the hyperbolic coring holes and the chambered holes, and blasting is conducted sequentially from inside to outside; due to the fact that the drilled holes in the waist portion of the coring hyperboloid are distributed densely and serve as a high-temperature and high-pressure center at the moment of blasting, blast crushed stones are cast towards the two ends of the hyperboloid, a bidirectional coring mechanism is achieved, through decoupling charge, over crushing is relieved advantageously, the proportion of casting work is increased, a good pinpoint blasting effect and a good outlining blasting effect are achieved for a cored body, and towering conditions are created for subsequent blasting; and hyperbolic chamber can be qualified to transitional linkage chambering blasting of an annular and tubular rock mass with a thick waist portion and two thin ends after the rock plug is cored and is through. The hyperbolic holes can also be used for rock plug pre-splitting or smooth surface forming blasting.

Description

technical field [0001] The present invention relates to rock plug blasting, including underwater or non-underwater rock plug penetration expansion and forming blasting for water resource optimal configuration water transfer and water intake projects, hydroelectric power generation water intake projects, and water intake projects for pumped storage power generation water intake projects. It is used in the tunnel excavation, penetration, expansion and forming blasting projects of tunnels, tunnels, tunnels, tunnels, etc. in transportation, railways, mines, and national defense. Background technique [0002] Rock plug blasting generally adopts explosive chamber blasting technology and relatively new pure hole blasting technology. However, in order to ensure the explosive chamber blasting of the overflow section, the former often over-explodes, and the overall over-explosion reaches 10%, and the partial over-explosion is seriously over-exploded up to 20%; while the latter is cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F42D1/00F42D3/04E21B7/28E21B7/04
CPCE21B7/04E21B7/28F42D1/00F42D3/04
Inventor 何本才
Owner NORTH CHINA BEIJING GUOYAN TECHN TESTING
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