A cutter head, a full-face hard rock tunneling machine based on drilling and blasting construction, and a rock breaking method

Abstract

The invention discloses a cutter head, a full-face hard rock tunneling machine based on drilling and blasting construction and a rock breaking method. The cutter head is divided into N areas, and a first inserting knife is arranged between two adjacent areas, and each The other boundary position of the area is provided with a second inserting knife, the impactor and the first arm frame connected with the impactor are arranged in the cutter head, and the first inserting knife or the second inserting knife of each area is provided with a gap for the impactor Extending and retracting, the boundary of each area is provided with a guide rail to form a circular guide rail for the impactor to move. A second arm frame is arranged inside the cutter head, and a slewing device is installed on the second arm frame. One side of the slewing device is provided with a Drill, the other side of which is provided with a filling device, and each area is provided with a drill for extending and retracting, and a rotary device for rotating after the drill is retracted so that the filling device is located at the side of the drill. Retracted position for extending and retracting through holes. It can combine the safety of the shield method and the high efficiency of the drill and blast method at the same time. Increase efficiency and increase safety.

Description

technical field [0001] The invention relates to the technical field of hard rock excavation, in particular to a cutter head, a full-section hard rock excavator based on drill-and-blast construction, and a rock breaking method. Background technique [0002] In the construction of underground projects, especially in the Sichuan-Tibet line project, hard rock tunnels account for a very high proportion. The construction methods of hard rock projects are currently mainly divided into shield method and drill and blast method. [0003] The rock breaking method of the existing hard rock boring machine is to apply normal stress to the rock through the hob. At this time, the rock is in a three-way compression state, and a very high extrusion force is required to make it crack and then break. With the increase of rock hardness, the wear of the hob will increase significantly, which will increase the frequency of tool change and construction cost, and greatly reduce the construction effi...

AI Technical Summary

Problems solved by technology

With the increase of rock hardness, the wear of the hob will increase significantly, which will increase the frequency of tool change and construction cost, and greatly reduce the construction efficiency

Although the drilling and blasting method can efficiently break rocks, its working environment is poor and its safety is low, and there are over- and under-excavation phenomena during construction.

These two construction methods have their own advantages and disadvantages, and are poorly adaptable to complex formations

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