Blasting device and method for rapid forming of V-shaped pit body in hard rock and slag throwing

Abstract

The invention discloses a blasting device and method for rapid forming of a V-shaped pit bot in hard rock and slag throwing. The blasting device comprises an initiation assembly (21), an upper powder grain unit (22), an explosive-proof pipe (23), a lower powder grain unit (24) and a throwing unit (25) which are are sequentially arranged from top to bottom; after the initiation assembly (21) is initiated, the upper powder grain unit (22) is detonated, the lower powder grain unit (24) is detonated after a period of delay through the explosion-proof tube (23), rock is subjected to delayed blasting, and the throwing unit (25) at the tail end is detonated to realize throwing of broken stones. According to the invention, through a method for creating a secondary free face, a conventional multi-time reaming charge blasting operation is optimized into standard and modularized combined charge, long-time explosion isolation of up-down charge in a hard hole is realized through research on the explosion isolation mechanism of the charge, and the two-time initiation and one-time throwing are formed, so that a V-shaped pit meeting the size parameter requirement 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 and simultaneous throwing and cleaning of crushed stones. 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 arrang...

AI Technical Summary

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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