Rock breaking method and device of cutterhead based on beveling angle high-pressure ice jet space-time arrangement

Abstract

The invention discloses a rock breaking method of a cutterhead based on beveling angle high-pressure ice jet space-time arrangement. The method comprises the following steps that step one, high-pressure ice jet flow jetted by a first-position mixed jet flow jetting device is adopted to form an inclined ice force cutting groove in a rock body, and an inverted trapezoidal boss structure is formed; step two, the center of the inverted trapezoidal boss structure is rolled by adopting a mechanical hob to form a regular trapezoidal rock boss; at the moment, a to-be-cut rock ridge part of which the strength is greatly reduced after being rolled by the hob exists below the mechanical hob; step three, the regular trapezoidal rock boss is segmented again through the high-pressure ice jet flow jettedby a second-position mixed jet flow jetting device; and step four, the residual rock mass crushed by rolling of the mechanical hob in step two and the regular trapezoidal rock boss segmented in stepthree are removed by using a mechanical scraper. The rock breaking method has the advantages that the rock breaking efficiency is improved and the rock breaking energy consumption is reduced. The invention further discloses a rock breaking device of the cutterhead based on beveling angle high-pressure ice jet space-time arrangement.

Description

technical field [0001] The invention relates to the field of tunnels and underground engineering, in particular to the field of TBM tunnel construction under complex geological conditions, more specifically, it is a rock-breaking method based on a cutter head arranged in time and space with an oblique angle high-pressure ice jet. The invention also relates to a rock-breaking device based on a cutter head arranged in time and space with an oblique angle high-pressure ice jet. Background technique [0002] Tunnel boring machine (TBM) has excellent features such as safety, environmental protection, and high efficiency, and is widely used in many tunnel construction projects such as hydraulic tunnels, mine roadways, traffic tunnels, and pipeline defense. However, since the development of TBM, it has changed from the traditional hand-held, mechanical, closed-chest and the current intelligent control integrated TBM equipment. The rock-breaking method of its mechanical hob rolling ...

AI Technical Summary

Problems solved by technology

However, when the high-pressure abrasive water jet cuts the rock, although the abrasive particles involved in the rock breaking are beneficial to the improvement of the rock-breaking depth, the abrasive cannot be recovered after cutting the rock mass, and the excessive water in the high-pressure abrasive water jet is harmful to the arid and water-deficient areas. At the same time, although water can take away most of the heat during the abrasive jet process, the temperature increase caused by the heat generated by the hammering action of the jet on the rock surface still cannot be effectively reduced; With the increasing requirements for green construction and safe construction, it is urgent to develop more green abrasives and jet technology with less water

[0005] The proposal of the ice particle jet technology can replace the traditional abrasive jet to a certain extent, but because the Mohs hardness of ice particles is low, only between 2-4, it is far from the traditional garnet abrasive Mohs hardness of 6-8. Its rock-breaking effect is greatly reduced

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