Layout Structure and Blasting Method of Anti-clogging Fast Well Cutting Blasting Hole

Abstract

The invention discloses an anti-blocking quick well completion slotting blasthole arrangement structure and a blasting method thereof. The structure comprises a central empty hole of a drilling blasthole at a raise center and multiple slotting holes which surround the central empty hole; the central empty hole and the slotting holes are filled with gunpowder in the well depth direction layer by layer, gunpowder bags are fixedly arranged on the portion, among layers, in the central empty hole, a cavity is formed between every two adjacent gunpowder bags, and the gunpowder bags in series and explosion initiation connection with an explosion guide pipe through a detonator; all the layers in the slotting holes are continuously filled with gunpowder separately, gunpowder loading segments are formed, stemming is used for separating the adjacent gunpowder loading segments, and all the gunpowder loading segments are in series and explosion initiation connection with the explosion guide pipe through a detonator. Through a mode of elementary-error explosion initiation in the holes and among the holes, the ball-shaped gunpowder bags are arranged in the central empty hole and apply downward slag throwing power to slotting broken rock, and the compensation space is provided for blasting of following auxiliary holes and surrounding holes. Blasting is conducted on a large-range free surface,the broken rock can be effectively prevented from blocking blasting cavities, the valid well completion compensation space is added, and efficient one-time well completion operation is achieved.

Description

technical field [0001] The invention belongs to rock blasting technology, and in particular relates to an anti-clogging rapid well-forming cutting and blasting hole arrangement structure and a blasting method thereof, which are mainly used for raising wells under hard rock conditions. Background technique [0002] Raise excavation has the characteristic that the longitudinal dimension is larger than the transverse dimension, but the construction space is narrow and the blasting free surface is small, which seriously restricts the excavation efficiency. One-time well-forming technology combined with reasonable blasthole layout is an effective method to speed up the well construction and reduce the cost of excavation. During the process of well excavation, the free surface of the opening of the cut hole is small, and the rock mass The broken expansion coefficient is large, and the loose and broken rock blocks occupy a large space, which may cause blockage of the cutting cavity...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: aiming at the problem of low excavation efficiency caused by blasting broken rocks blocking the cutting cavity under hard rock conditions, it provides an anti-clogging rapid well-forming and cutting blasting hole arrangement structure and its blasting method to solve the problem of hard rock. The problem of high-efficiency slag throwing of the cutting cavity in the process of one-time well formation of rock raised wells, to achieve efficient one-time blasting of raised wells under hard rock conditions

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