Rock-breaking method and device for cutter head based on space-time arrangement of oblique high-pressure ice jet

Abstract

The invention discloses a rock-breaking method based on a cutter head arranged in time and space with an oblique angle high-pressure ice jet. It includes the following steps: Step 1: Use the high-pressure ice jet sprayed by the No. 1 mixed jet injection device to form inclined ice-force cutting grooves on the rock mass to form an inverted trapezoidal boss structure; Step 2: Use a mechanical hob to roll down the trapezoidal boss structure. At the center of the platform structure, a positive trapezoidal rock boss is formed; at this time, there is a rock ridge under the mechanical hob whose strength is greatly reduced after being rolled by the hob; Step 3: The positive trapezoidal rock boss is mixed by the No. 2 jet The high-pressure ice jet sprayed by the injection device is divided again; Step 4: Use a mechanical scraper to remove the residual rock mass that has been rolled and crushed by the mechanical hob in Step 2 and the positive trapezoidal rock bosses that have been divided in Step 3. The invention has the advantages of improving the crushing efficiency of rocks and reducing the energy consumption of rock breaking. The invention also discloses a rock-breaking device based on a cutter head arranged in time and space with an oblique angle high-pressure ice jet.

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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