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Water jet assisted bolter miner and tunneling method

A technology of water jet and bolter, which is applied in the direction of cutting machinery, slitting machinery, earthwork drilling and mining, etc. It can solve the problems such as the limitation of the total height of the roadway and affect the construction progress, so as to improve the efficiency of construction and excavation and prolong the service life , the effect of reducing the workload

Active Publication Date: 2021-08-17
CHINA RAILWAY CONSTR HEAVY IND
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  • Abstract
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AI Technical Summary

Problems solved by technology

This method adopts layered mining, which is suitable for the mining of 45-55m thick coal seams containing gangue in the middle. Simultaneously there are multiple scattered gangue layers, and layered excavation will affect the construction progress

Method used

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  • Water jet assisted bolter miner and tunneling method
  • Water jet assisted bolter miner and tunneling method
  • Water jet assisted bolter miner and tunneling method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] see Figure 1-Figure 7 , a water jet assisted bolter, including a fuselage 7, a cutting drum 1 and a plurality of water jet injection assemblies.

[0042] The cutting drum 1 is horizontally arranged at the working front end of the fuselage 7 and facing the face of the excavation. The cutting drum 1 is connected with the power arm on the fuselage 7 through the rotary joint 4, and can be mounted on the fuselage 7. Driven to move up and down along the palm surface and to and fro in the circumferential direction. During the operation, the above two movements are compounded at the same time. A plurality of picks 3 are helically arranged on the outer surface of the cutting drum 1 .

[0043] A plurality of said water jet injection assemblies are arranged at intervals along the axial direction of the cutting drum 1, and the number of nozzles 2 in each water jet injection assembly is equal and at least one, and the nozzles 2 are arranged on the outer surface of the cutting drum...

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Abstract

The invention provides a water jet assisted bolter miner and a tunneling method. The bolter miner comprises a cutting roller and a water jet injection assembly, the water jet injection assembly comprises at least one spray head movably arranged on the surface of the cutting roller, the spray head comprises a cutting nozzle, a dust removal nozzle and a nozzle switching assembly arranged between the cutting nozzle and the dust removal nozzle, the nozzle switching assembly comprises a plugging piece and an elastic piece, and the plugging piece reciprocates between the two nozzles under the combined action of water flow and the elastic piece, so that water is sprayed out of the cutting nozzle to form clustered jet flow or sprayed out of the dust removal nozzle to form diffused jet flow. During tunneling operation, the tunneling anchor machine switches the operation mode of the spray head by controlling the pressure of the output flow of a pump station; in the high-pressure small-flow mode, the cluster jet flow cuts a gangue layer to form a groove; and in the low-pressure large-flow mode, the cutting roller rotates to crush rocks, and the diffused jet flow cools cutting teeth and remove dust during construction, so that shutdown tool changing and complex nozzle switching operation can be avoided, and the working efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of coal mine construction equipment, in particular to a water-jet assisted bolter and an excavation method suitable for excavating gangue-containing coal seams. Background technique [0002] my country is the world's largest coal-producing country, and domestic coal seam reserves and production account for a large proportion of national coal production. At present, mechanized construction equipment such as bolters are generally used for coal roadway excavation, and bolter machines can be well applied to coal seam roadway excavation. However, in the process of coal roadway excavation, gangue layers are often randomly distributed on the tunnel face. Since the hardness of gangue is much higher than that of the surrounding coal seam, and the existing bolter equipment has not been specially designed for gangue excavation, therefore Under this working condition, the operation has obvious disadvantages. It is nece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C25/60E21C25/10E21C35/18E21C35/22E21C35/23E21C35/00
CPCE21C25/60E21C25/10E21C35/18E21C35/22E21C35/23E21C35/00
Inventor 刘飞香廖金军陈望蒋海华易达云祝爽范远哲张双全伍容
Owner CHINA RAILWAY CONSTR HEAVY IND
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