Hole filling method by blasting

Abstract

The invention relates to a hole filling method by blasting. The materials used comprises two parts, i.e., a hole filling material and hole filling cartridge bags. A blast hole is sealed by using a common hole filling material; the hole filling cartridge bags are alternately arranged inside the hole filling material along the direction of the blast hole. A time-delayed detonating method is employed for allowing the cartridge bags to be detonated firstly inside the blast hole. The energy generated by the explosion of the explosive inside the hole filling cartridge bags allows the common hole filling material above and below the explosive to be compacted, thereby increasing the frictional force between the hole filling material and the wall surface of the blast hole. Meanwhile, the delayed time between a hole filling cartridge bag and a main charge of a charge section is designed, thereby achieving that the detonation gas generated by the hole filling cartridge bags inside the filling section is not escaped upon detonating the main charge, and accordingly generating a high pressure environment inside the filling section, and increasing the hole filling effect.

Description

technical field

[0001] The invention belongs to the technical field of blasting, and in particular relates to a dynamic plugging method for blastholes. Background technique

[0002] In the blasting operation, the blast hole needs to be blocked after the blast hole is filled with explosives, referred to as "plugging hole". The plugging quality directly determines the blasting effect. Poor plugging quality often leads to problems of punching and high block rate, and even serious consequences of flying stones hurting people. The main reasons for poor plugging quality are as follows: (1) insufficient plugging length; (2) improper selection of plugging objects or too loose; (3) water in the blast hole (ie, water hole). In order to ensure the quality of plugging, in addition to the reasonable selection of plugging materials, other commonly used methods include: (1) Increase the length of packing: increasing the length of packing can effectively improve the quality of hole pluggi...

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