Heading machine utilizing pressurized air to break rock and heading method of heading machine

Abstract

The invention discloses a heading machine utilizing pressurized air to break rock and a heading method of the heading machine. The problems that the extruding rock breaking efficiency of a hob is low,abnormal abrasion and replacement frequency of the hob are increased, the tunneling efficiency of a shield is reduced, and the tunneling cost is increased are solved. The heading machine comprises aheading machine main machine, a cutterhead is arranged on the heading machine main machine, and a pressurized air generating device is arranged on the cutterhead. The principle of using the pressurized air to break the rock is utilized to replace a traditional metal cutter, so that the rock breaking efficiency is greatly improved; meanwhile, when seriously uneven geology such as the geology with soft upper portions and hard lower portions is tunneled, the problem that the traditional metal cutter is extremely prone to being damaged abnormally is solved, so that the cutter cost is reduced, andcutter replacing risks are reduced; a suspension cutting rock breaking or extruding rock breaking mode is used, the excavation efficiency is greatly improved, and the excavation cost is reduced.

Description

technical field [0001] The invention relates to the field of tunnel boring machines, in particular to a tunnel boring machine and a tunneling method that utilizes pressurized wind to break rocks. Background technique [0002] At present, tunnel excavation is aimed at rock formations, mainly relying on disc-shaped hobs to squeeze rocks to achieve the purpose of breaking rock masses. The main thing to overcome is the compressive strength of rocks. For rock formations with general strength, the rock-breaking efficiency is acceptable. However, with the increase of rock strength, the efficiency of the hob to crush rock gradually decreases, and the abnormal wear and replacement frequency of the hob increases, resulting in a decrease in shield tunneling efficiency and an increase in tunneling costs. At the same time, when excavating severely uneven geology such as soft top and hard bottom, traditional metal tools are prone to abnormal damage. [0003] The principle of pressurized ...

AI Technical Summary

Problems solved by technology

[0002] At present, tunnel excavation is aimed at rock formations, mainly relying on disc-shaped hobs to squeeze rocks to achieve the purpose of breaking rock masses. The main thing to overcome is the compressive strength of rocks. For rock formations with general strength, the rock-breaking efficiency is acceptable. However, with the increase of rock strength, the efficiency of the hob to squeeze and break the rock gradually decreases, and the abnormal wear and replacement frequency of the hob increases, resulting in a decrease in the efficiency of shield tunneling and an increase in tunneling costs.

At the same time, when excavating severely uneven ground such as soft top and hard bottom, traditional metal tools are prone to abnormal damage

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