A device for anti-blasting and vibration-dumping brackets for excavating underground and uphill in coal mines

Abstract

The invention discloses a device for preventing support toppling caused by blasting vibration for coal mine underground raise advance. The device comprises a plurality of supporting and retaining frameworks, a ground beam assembly and inclined supporting rods. The supporting and retaining frameworks are installed on the tops of U-type supports close to the workface of a coal seam, and the ends of the adjacent supporting and retaining frameworks are connected. The ground beam assembly comprises two steel rails and two brackets, the two brackets are installed on the two bottom feet of the U-type supports provided with the supporting and retaining frameworks, and the two steel rails are installed in the two brackets respectively. The upper ends of the inclined supporting rods are connected with the U-type support at the tail end of the supporting and retaining framework farthest to the workface of the coal seam through spherical hinges, and the lower ends of the inclined supporting rods are supported on a roadway bottom plate. The tops of the U-type supports close to the workface of the coal seam are connected through the supporting and retaining frameworks, the bottom feet are connected into a whole through the ground beam assembly, the inclined supporting rods are arranged on the U-type support at the tail end of the supporting and retaining framework farthest from the workface of the coal seam, the anti-overturning ability of the U-type supports is enhanced, and a safety guarantee is provided for workface advancing.

Description

technical field [0001] The invention belongs to the field of coal mine shaft and roadway engineering, and in particular relates to a device for anti-blasting and vibration-dumping brackets for excavating underground and uphill in coal mines. technical background [0002] Uphill tunneling in coal mines often adopts blasting methods. For the convenience of drilling, coal (rock) dropping, and coal (rock) loading and transportation, uphill tunneling is better than downhill tunneling. However, during the excavation construction up the mountain, the supporting brackets that have been supported are often tilted and collapsed due to the vibration of blasting. It brings danger to the excavation engineering construction and the complexity and long-term nature of roadway repair. In order to improve the stability of the support during the blasting and vibration of the uphill excavation, various types of anti-overturning structural facilities have been used underground in coal mines, bu...

AI Technical Summary

Problems solved by technology

However, during the excavation construction on the mountain, the supporting brackets that have been supported are often tilted and collapsed due to the vibration of blasting.

It brings danger to the construction of excavation engineering and the complexity and long-term nature of roadway repair

In order to improve the stability of the support during the blasting and vibration of the uphill excavation, various types of anti-overturning structural facilities have been used underground in coal mines, but with little effect, especially in the process of large-section uphill excavation. Not only the stability of the uphill support The performance is greatly affected by the vibration of blasting, and the accident probability of coal and gas outburst and top coal (rock) dumping is also increased.

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