Cutter head, full-section hard rock heading machine based on drilling and blasting construction and rock breaking method

Abstract

The invention discloses a cutter head, a full-section hard rock heading machine based on drilling and blasting construction and a rock breaking method. The cutter head is divided into N areas, a first slotting tool is arranged between every two adjacent areas, and second slotting tools are arranged at other boundary positions of each area; an impactor and a first arm frame connected with the impactor are arranged in the cutter head, a notch is formed in the first slotting tool or the second slotting tool of each area for the impactor to stretch out and retract, and a guide rail is arranged on the boundary of each area to form an annular guide rail for the impactor to move; a second arm frame is arranged in the cutter head, a rotating device is arranged on the second arm frame, a drilling device is arranged on one side of the rotating device, and a chemical filling device is arranged on the other side of the rotating device; and each area is provided with a through hole for the drilling device to stretch in and retract and for the rotating device to rotate after the drilling device retracts so that the chemical filling device can stretch in and retract at the retracting position of the drilling device. The safety of a shield method and the high efficiency of a drilling and blasting method can be achieved at the same time. The efficiency is improved, and the safety is improved.

Description

technical field [0001] The invention relates to the technical field of hard rock excavation, in particular to a cutterhead, a full-face hard rock excavation machine based on drilling and blasting construction, and a rock breaking method. Background technique [0002] In underground engineering construction, especially in the Sichuan-Tibet line project, hard rock tunnels occupy a very high proportion. The construction methods of hard rock engineering are currently mainly divided into shield method and drill and blast method. [0003] The rock breaking method of the existing hard rock roadheader is to apply normal stress to the rock through the hob. At this time, the rock is in a three-dimensional compressive state, and a very high extrusion force is needed to make it crack and then break. As the hardness of the rock increases, the wear of the hob will increase significantly, thereby increasing the frequency of tool changes and construction costs, and greatly reducing construc...

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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