Novel rock breaking method and rock breaking hob

A hob and rock-breaking technology, which is applied in the field of flaking and rock-breaking methods and rock-breaking hobs suitable for flaking and breaking rocks, can solve the problems of short tool life and hob wear, and achieve slow blade wear and low consumption , The effect of high excavation efficiency

Inactive Publication Date: 2014-07-30
邵祥顺
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] One of the purposes of the present invention is to provide a novel rock-breaking method, which is applied in rock-breaking operations in tunnels to solve the problems of severe hob wear and short tool life in existing rock-breaking methods; the second purpose of the present invention is to provide A rock-breaking hob suitable for a new rock-breaking method

Method used

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  • Novel rock breaking method and rock breaking hob
  • Novel rock breaking method and rock breaking hob
  • Novel rock breaking method and rock breaking hob

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Embodiment Construction

[0031] Such as figure 1 , figure 2 As shown, it is a schematic diagram of the existing rock-breaking method of "positive pressure straight cutting rock-breaking method". The central axis revolves, and on the other hand, it rotates around its own axis. Under the action of pressure F and torque, the disc hob cuts a series of concentric circles on the palm face. When the pressure exceeds the strength of the rock, the rock under the tip of the disc-shaped hob is directly broken, and the tip penetrates into the rock, and the rock on the face of the face is crushed by the disc-shaped hob to form multiple concentric circular grooves. As the depth of the groove increases, the cracks on the surface of the rock mass deepen and expand. When the pressure of the hob exceeds the shear and tensile strength of the rock, the rock between adjacent concentric grooves collapses in pieces, completing the breaking of the disc hob. rock process. In this rock-breaking method, the stress form of ...

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Abstract

The invention discloses a novel rock breaking method and a rock breaking hob and relates to the technical field of tunnel boring. The novel rock breaking method and the rock breaking hob are applied to the rock breaking operation of tunnels; the problems that a hob is seriously worn and is short in service life in the existing rock breaking method are solved. According to the chipping rock breaking method, an included angle beta is formed between a hob blade and a normal of a tunnel face; after the pressure is applied to the disc-shaped hob, the blade penetrates into rock and a dense kernel is generated at the front end of the blade; the dense kernel continuously expands to tear off surrounding rock and forms a breaking area; rocks on a dangling face are chipped by expanding the breaking area; the blade of the disc-shaped hob is mainly used for bearing a shear force; the strength of the shear force is 6-9 percent of the compressive strength of the rock. The chipping rock breaking method has the advantages that firstly, the hob blade is mainly used for overcoming the shear resisting strength of the rocks, the compressive strength of a hob single spindle is greatly reduced, the blade of a hob ring is slow in wear and the hob is long in service life; secondly, the chipping rock breaking method is high in rock breaking and high in tunneling efficiency and is particularly suitable for excavating and tunneling of full-section hard-rock geology; thirdly, consumed power of tunneling equipment is lower.

Description

technical field [0001] The invention relates to the technical field of tunnel excavation, in particular to a method for flaking and breaking rock and a rock-breaking hob suitable for flaking and breaking rock. Background technique [0002] Tunneling equipment is more and more widely used in the construction of underground projects such as subways, rail transit, and coal mine roadways. The disc-shaped hob installed on the cutter head of the tunnel excavation equipment is an important tool for breaking rocks during the excavation process. At present, the structure of the disc-shaped hob mainly includes the hob cutter ring, cutter hub, fastening cover, end cover, and cutter shaft. , bearings and seals. When the disc hob breaks the rock, it bears huge load and impact, and at the same time bears the severe friction of the rock, and produces a large amount of slag and gravel. The surface of the exposed parts of the disc hob is worn, especially the hob cutter ring and cutter hub,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D9/10E21D9/11
Inventor 陈雷赵万新庞玉申孔瑞萍
Owner 邵祥顺
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