Hole sealing device for blasting water injection in deep coal seam and blasting water injection method of device

Abstract

The invention relates to a hole sealing device for blasting water injection in a deep coal seam. The hole sealing device comprises a blasting mechanism and a water injection sealing device, wherein the blasting mechanism comprises an explosive chamber and an explosive, wherein the explosive chamber is of an I-shaped cylinder structure; the water injection sealing device is arranged at an opening of the coal seam and used for sealing the opening of the coal seam and an external space of a blasting mechanism to ensure that the blasting mechanism is completely detonated in a closed space. Hydraulic coupling blasting is combined with coal seam water injection to achieve integration of blasting and injection, the operation process is simplified, operation procedures are reduced, the work intensity of workers is reduced, direct water injection after loose blasting is achieved, the purposes of relieving pressure of the coal seam, shifting the stress forward, wetting coal bodies, improving theplasticity of the coal bodies and reducing dust production are achieved, and the technical problems are solved that in existing blasting and coal falling operation of the deep coal seam, the work intensity of the workers is high, inconvenience is caused during use, the hole sealing effect is poor, and hole sealing devices cannot be recycled. Compared with the prior art, the hole sealing device has the advantage of having a great market prospect and a great development space.

Description

technical field [0001] The invention relates to the technical field of deep coal seam blasting and cracking, in particular to a hole sealing device for deep coal seam blasting and water injection. Background technique [0002] my country is the largest coal-producing country in the world today, and its coal production accounts for more than 35% of the world's total. my country is also the country with the largest coal consumption in the world. Coal has always been the main energy source and important raw material in our country. Coal has always accounted for more than half of the primary energy production and consumption. my country has abundant coal reserves, but the geographical distribution of coal resources is extremely unbalanced, and there are few reserves suitable for open-pit mining. Most of the coal resources are located hundreds of meters or even thousands of meters deep underground, resulting in low mining efficiency, excessive investment, and construction. The cy...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the existing deep coal seam blasting and falling coal operation, the dustproof effect of the sealing yellow mud is not good, and it cannot prevent electric sparks. It needs to be transferred from the well to the bottom. Due to the technical problems that the hole sealing device cannot be recycled, the present invention provides a hole sealing device for deep coal seam blasting and water injection, which realizes reasonable structure and ingenious design, and combines hydraulic coupling blasting and coal seam water injection to realize the integration of blasting and injection. Operation process, reduce operation procedures, reduce worker's work intensity, realize direct water injection after loosening and blasting, achieve coal seam pressure relief, stress forward shift, coal body moistening, improve coal body plasticity, and reduce dust production

Images