Composite full-fracture surface tunneling machine cutterhead system by utilizing drilling and blasting to perform auxiliary rock breaking

Abstract

The invention discloses a composite full-fracture surface tunneling machine cutterhead system by utilizing drilling and blasting to perform auxiliary rock breaking, and relates to the field of tunnelconstruction devices. The composite full-fracture surface tunneling machine cutterhead system by utilizing drilling and blasting to perform auxiliary rock breaking comprises a rotatable cutterhead, amechanical arm, a moving mechanism, a rock drilling device and an explosive installing device; a plurality of hobs are arranged on the surface of one side of the cutterhead, and a plurality of preformed holes capable of being opened and closed are formed in the cutterhead; the mechanical arm is configured to be telescopic so as to penetrate through the preformed holes; the moving mechanism is usedfor driving the mechanical arm to move to be aligned with the preformed holes; the rock drilling device is used for drilling a hole in a rock stratum after the mechanical arm penetrates through the preformed holes; and the explosive loading device is used for installing explosives into the drilled hole after the rock drilling device drills the hole. According to the composite full-fracture surface tunneling machine cutterhead system by utilizing drilling and blasting to perform auxiliary rock breaking, in the rock breaking process, the drilling and blasting function can be fully utilized to form a free face so as to release ground stress, degrade the rock strength, improve the rock breaking efficiency of the hobs, reduce the power consumption and solve the problems that tunneling of the cutterhead is difficult, and the hobs are prone to be damaged.

Description

technical field [0001] The present application relates to the field of tunnel construction equipment, in particular to a composite full-section tunnel boring machine cutter head system for drilling and blasting assisted rock breaking. Background technique [0002] In tunnel construction at home and abroad, the shield tunneling method has the advantages of good construction quality, environmental protection, and low cost. It can achieve a high degree of automation and mechanization. It is currently the most efficient tunnel construction method. many. At present, the research on the full-face roadheader mainly focuses on the force of the cutter head and the distribution of the cutters, and has achieved rich results. However, there is still no effective solution to the technical problems of the roadheader in the excavation of high ground stress hard rock areas. [0003] When the roadheader encounters a rock formation with high ground stress and high hardness, it will be more d...

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Problems solved by technology

[0004] The purpose of this application is to provide a composite full-face tunnel boring machine cutter head system with drilling and blasting assisted rock breaking, which can make full use of the drilling and blasting function in the rock breaking process to form a free surface to release ground stress and deteriorate rock strength. Improve the rock-breaking efficiency of the hob, reduce power consumption, and solve the problems of difficult excavation of the cutter head and easy damage of the hob

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