Heading machine and abrasive jet flow auxiliary rock breaking device thereof

Abstract

The invention discloses a heading machine and an abrasive jet flow auxiliary rock breaking device thereof. The abrasive jet flow auxiliary rock breaking device comprises jet flow nozzles used for jetting a mixture of abrasive and water, an executing mechanism, an abrasive supply device used for supplying the abrasive to the jet flow nozzles, and a pressure water supply device used for supplying water with certain pressure to the jet flow nozzles. The jet flow nozzles are installed on the executing mechanism and driven by the executing mechanism to move so as to achieve adjustment of the spraying angles, the target distances and the radial positions of the jet flow nozzles, and the executing mechanism is provided with shooting equipment used for obtaining tunnel face information in real time. In the using process of the abrasive jet flow auxiliary rock breaking device, the jet angles, the target distances and the radial positions of the jet flow nozzles can be adjusted through the executing mechanism, excessive jet flow nozzles are prevented from being arranged, the pressure of abrasive jetted by each jet flow nozzle is guaranteed, and therefore the rock cutting efficiency and quality are guaranteed.

Description

technical field [0001] The invention relates to the technical field of tunnel construction equipment, in particular to an abrasive jet assisted rock breaking device. In addition, the present invention also relates to a roadheader comprising the above-mentioned abrasive jet assisted rock breaking device. Background technique [0002] The traditional full-face tunnel boring machine (TBM) squeezes, rolls, and rubs the tunnel face through the disc-shaped hob arranged on the rotating cutter head, which causes high stress and radial cracks in the rock to achieve mechanical rock breaking. However, when TBM is excavating in hard rock and extremely hard rock, due to the limited strength of the tool material and the structural strength of the main bearing, there are many problems such as increased tool wear, increased tool change times and tool change time, mechanical rock breaking The capacity is greatly reduced, seriously affecting the construction schedule and construction cost. ...

AI Technical Summary

Problems solved by technology

[0004] Since the target distance from the nozzle to the tunnel face and the spray angle are the key parameters affecting the rock-breaking ability during TBM excavation, it is necessary to adjust the target distance from the nozzle to the tunnel face and the spray angle in real time by obtaining the surrounding rock of the tunnel face to ensure The ideal cutting depth can be achieved in a single pass; however, the jet nozzle is generally fixed on the cutter head, so that the radial distance from the nozzle to the rotation center of the cutter head remains constant. For rock, nozzles are usually added in different radial directions of the cutter head, and this arrangement will cause the outlet pressure of a single nozzle to drop, which will reduce the rock-breaking efficiency. At the same time, due to the increase of nozzles, the corresponding hydraulic pipelines and joints will also increase. This further increases the failure rate of poor sealing leading to system pressure relief or even burst tubes

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