detonating device and method for rapidly forming V-shaped pit in hard rock

Abstract

The invention discloses a detonating device and method for rapidly forming a V-shaped pit in a hard rock. The blasting device comprises a detonation component (21), an upper explosive column unit (22), an explosive-proof pipe (23) and a lower explosive column unit (24) which are sequentially arranged from top to bottom (23); and after the detonation component (21) is detonated, the upper explosivecolumn unit (22) is detonated, detonation is delayed for a period of time through an explosion-proof pipe (23), and then the lower explosive column unit (24) is detonated, so that the rock is subjected to delay detonating. According to the detonating device and method for rapidly forming the V-shaped pit in the hard rock, through a method of creating a secondary free surface, the multi-hole charging and detonating operation in the past adopts standard and modularized combined charging optimally, an explosive-loading and explosion-proof mechanism is studied, so that long-time interval explosion when the explosive is loaded into the upper and lower portions of a hard hole is realized, so that the V-shaped pit meeting the requirement of the size parameter is well formed.

Description

technical field [0001] The invention belongs to the technical field of blasting, and relates to a blasting device and method for one-time forming of special V-shaped pits on hard rocks. Background technique [0002] In the fields of mining, construction and military applications, it is usually necessary to excavate special pits with V-shaped cross-sections on hard rocks, such as figure 1 As shown, the V-shaped pit is a V-shaped pit that is wide at the top and narrow at the bottom, the mouth d of the pit body is smaller than the depth h, and has a certain inclination angle requirement. It is commonly known as a variant funnel, and blasting is usually used for excavation. figure 2 The formation method of conventional layered blasting of V-shaped pits is given. First, several cutting holes are drilled in the upper layer of the rock, including the central hole and the edge hole. The position of the cutting holes is arranged as follows: figure 2 The hole diagram below. Small ...

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Problems solved by technology

The problem with this method is that the number of drilling holes is large, the operation time is long, and the consumption of explosives is also high, so it is difficult to meet the needs of rapid prototyping in military applications.

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