Uniparted hyperboloid coring and chambering rock-plug blasting method

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...

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.

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