Full-section roadheader and rock-breaking method with cutter head, impact drill and hob

Abstract

The invention discloses a full-section roadheader and a rock-breaking method with a cutter head, an impact row drill and a hob for rock breaking, which are used for the full-section roadheader. The outer edge of the disc is provided with a drilling device. When in use, the cutter head does not rotate, all the drilling devices start to work, and drill holes into the face of the face. After the current group of holes is completed, the cutter head rotates at a certain angle so that the next group of holes of the drilling device is adjacent to the current group of holes. , to complete the second group of drilling, and finally the separation of the face and surrounding rock to form an empty face, the drilling device first digs out the peripheral slot holes on the face to form a face, so that the face and the surrounding rock can be separated. Isolate the rock, and then use the hob to break the rock, which reduces the disturbance to the surrounding rock in the subsequent construction, and reduces the strength of the outermost rock on the face after the formation of the air surface, and the outer ring hob is no longer a three-way bearing. force, increase the rock breaking efficiency of the outer ring hob, reduce the tool and energy loss, thereby improving the rock breaking efficiency and prolonging the service life.

Description

technical field [0001] The invention relates to the technical field of shield tunneling, in particular to a full-section roadheader and a rock-breaking method with a cutter head, an impact drill row and a hob for rock-breaking. Background technique [0002] In the field of tunnel construction, the shield machine for tunnel construction has the advantages of high degree of automation, labor saving, fast construction speed, one-time hole formation, no climate influence, control of ground subsidence during excavation, reduction of impact on ground buildings and water The characteristics such as water surface traffic are not affected during the lower excavation. In the case of a long tunnel line and a large buried depth, it is more economical and reasonable to use a shield machine for construction. However, for the excavation of hard rock and super-hard rock, the TBM's excavation speed is still very slow, especially the rock close to the center of the cutter head is extremely di...

AI Technical Summary

Problems solved by technology

However, the rotation speed of the cutter head is very slow, usually 10r / min, and the impact load generated is small. Compared with hydraulic impactors, such as down-the-hole hammers and rock drills, the impact load is negligible. Therefore, the cutter head is broken The efficiency of hard rock or super hard rock is low, and the closer to the center of the cutter head, the lower the linear speed of the hob, the lower the impact load generated, which makes it extremely difficult to break the rock at the center of the face, and the tool wears seriously , the tunneling efficiency is slow

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