Retractable tunneling machine convenient for underground transport

Abstract

The invention provides a retractable tunneling machine convenient for underground transport, which aims to solve the problems that the existing heavy large-power tunneling machine generally has overlarge body size, can not be disassembled and is not beneficial to underground transport, and a cutting head is not retractable. The invention has the essentials that the box body of a cutting speed reducer is connected with the retractable section of the cutting head through two hydraulic cylinders; the cutting head is provided with a special water channel of high pressure water; a shovel board, a first conveyer, a connecting bar and a back support are connected sequentially in an articulated mode to form a four-bar mechanism; and the body is divided into a front body frame and a back body frame from the middle. The invention is beneficial to underground transport and installation and improves the utilization rate of the underground tunneling machine.

Description

technical field [0001] The invention relates to a tunnel boring machine for coal mines, in particular to a retractable tunnel boring machine capable of tunneling all-rock tunnels, reducing the loss of pick teeth, convenient for conveying materials, and convenient for underground transportation and installation. Background technique [0002] At present, roadway boring machines can only cut rocks with a compressive strength of ≤10. When this range is exceeded, the common method is to use blasting. The blasting operation is not only highly dangerous but also wastes a lot of time, which affects the efficiency of tunneling. Therefore, various scientific research units have developed tunneling machines that can cut rocks with a compressive strength > 10. However, the existing heavy-duty and high-power roadheaders generally have a body that is too large and cannot be disassembled, which is not conducive to underground transportation during downhole installation and uphole mainte...

AI Technical Summary

Problems solved by technology

The blasting operation is not only highly dangerous but also wastes a lot of time, which affects the efficiency of tunneling. Therefore, various scientific research units have developed tunneling machines that can cut rocks with a compressive strength > 10

However, the existing heavy-duty and high-power roadheaders generally have a body that is too large and cannot be disassembled, which is not conducive to underground transportation during downhole installation and uphole maintenance. At the same time, when cutting hard rock, the pick wears too fast and it is inconvenient to transport materials. Disadvantages; Secondly, the cutting reducer box is connected to the cutting head through the cantilever section, so that the cutting head cannot be stretched

To sum up these shortcomings, some coal mines even abandon mechanical excavation

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