Liquid explosive detonating method adopting hole bottom air cushion

Abstract

A liquid explosive detonating method adopting a hole bottom air cushion comprises the following steps that a medium-length hole is drilled in an appropriate position of rock; an air cushion bag loaded with light-weight foaming filler and soil-rock blocks is placed into the hole bottom of the medium-length hole, a detonating cord is fixed to the upper end of the air cushion bag, a detonator is bound to the detonating cord, and a detonating tube is connected to the detonator and extends over the ground; a plastic film barrel with the bottom sealed is placed into the medium-length hole; liquid explosives are injected into the plastic film barrel; the portion, above the liquid explosives and the outside the plastic film barrel, inside the medium-length hole is filled with pulverized soil; and an igniter is used for igniting the detonating tube, the detonator is ignited through the detonating tube, the detonating cord is ignited through the detonator, and then the liquid explosives at the bottom of the medium-length hole are ignited through the detonating cord. The liquid explosive detonating method adopting the hole bottom air cushion has the advantages that the explosive energy utilization rate is high, the rock is evenly crushed, blast heaps are centralized, bedrock is prevented, the use quantity of the detonating cord is decreased, the blasting cost is lowered, a few of flying stones are produced and the safety is high; and the liquid explosive detonating method adopting the hole bottom air cushion is mainly used for occasions, where blasting is conducted on medium-length holes of ore and rock, of mines, repaired roads, quarries and the like.

Description

technical field [0001] The invention relates to a blasting technology, in particular to a method for detonating an air cushion at the bottom of a liquid explosive hole. Background technique [0002] Due to the advantages of simple manufacture, low cost, high power, and easy filling, liquid explosives are widely used in many mining and engineering blasting. At present, they are mainly used in medium and deep hole blasting with a hole depth greater than 5 meters. Now the detonation of liquid explosives The method basically uses an electric detonator and a detonating index to detonate. The detonating cord extends to the bottom of the hole. When detonating in this method, the detonator detonates the detonating cord first, and the detonating cord detonates the liquid explosive. The explosives in the hole explode first, then explode downwards in turn, and the explosives at the bottom explode last. This method of detonating from the hole is relatively simple and easy to operate, bu...

AI Technical Summary

Problems solved by technology

[0002] Due to the advantages of simple manufacture, low cost, high power, and easy filling, liquid explosives are widely used in many mining and engineering blasting. At present, they are mainly used in medium and deep hole blasting with a hole depth greater than 5 meters. Now the detonation of liquid explosives The method basically uses an electric detonator and a detonating index to detonate. The detonating cord extends to the bottom of the hole. When detonating in this method, the detonator detonates the detonating cord first, and the detonating cord detonates the liquid explosive. The explosives in the hole explode first, then explode downwards in turn, and the explosives at the bottom explode last. This method of detonating from the hole is relatively simple and easy to operate, but its disadvantage is that more detonating cords are used and the cost is high. High, when the hole is blasted first, the energy of the explosives at the bottom will rush upwards, the energy loss will be large, and there will be more large pieces. The force is upward, and the flying stones are far away. It also reduces the thrust on the rocks in front of the hole, often at the front of the resistance line. Roots remain at the bottom, which reduces the depth and quantity of broken rocks. Sometimes there will be a big pit in the back without blasting in the front, which affects the construction progress, and even requires secondary blasting, which affects production efficiency and improves operations. cost

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