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Judging method of boring state of hard rock TMB

A hard rock roadheader and hard rock technology, applied in special data processing applications, instruments, electrical digital data processing, etc. Problems such as the complexity of the rock mechanics process, to achieve the effect of improving the stress state of the cutter and improving the tunneling efficiency

Inactive Publication Date: 2016-01-20
MILITARY TRANSPORTATION UNIV PLA
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Problems solved by technology

[0005] However, the multi-jointed hard rock mass makes the mechanical process of hard rock TBM rock breaking more complicated, and it is difficult to calculate the optimal energy consumption for excavation that matches the excavation rate. The current technology and means have not yet achieved a reasonable estimate of the optimal excavation specific energy.

Method used

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  • Judging method of boring state of hard rock TMB
  • Judging method of boring state of hard rock TMB
  • Judging method of boring state of hard rock TMB

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Embodiment

[0046] In the tunnel project of this embodiment, the structural parameters of the hard rock TBM used are as follows: 38 disc-shaped hobs with a constant section of 432 mm are installed on the cutter head, that is, the initial radius R of the hob is 216 mm, and the radius of the cutter head is 3.285 m. The sum of knife installation radius is 62.415m.

[0047] The surrounding rock is a broken rock formation with many joints. The detailed steps for estimating the specific energy of TBM excavation are given as follows:

[0048] In the first step, according to the relationship (1) between the thrust of the hob and the depth of cut during the normal tunneling process of the hard rock TBM, which is determined by the rock mass joints and rock mechanics parameters, the inversion identification of the experimental data is used to determine k = 172.89, b=1.07, then formula (1) becomes:

[0049] f n =172.89p 1-1.07 =172.89p -0.07

[0050] In the second step, in this embodiment, all t...

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Abstract

The invention relates to a judging method of the boring state of a hard rock TMB (Tunnel Boring Machine). The method comprises the following steps of calculating the ideal boring specific energy of the hard rock TBM; combining boring data collected on site to calculate the actual boring specific energy of the hard rock TBM; using the ideal boring specific energy and the actual boring specific energy to calculate the specific energy deviation rate e; and judging the actual boring state of the hard rock TBM according to the specific energy deviation rate e. The judging method has the advantages that by starting from the hobbing cutter rock body cutting mechanical analysis, the mutual relationship between the boring specific energy and the cutting depth is determined; a novel method for calculating the optimum boring specific energy of the hard rock TBM is provided; on the basis of an optimum specific energy calculation formula, the judging method of the boring state of the hard rock TBM is provided; and more scientific reference basis is provided for improving the boring efficiency, matching the boring parameters and improving the cutter stress state.

Description

technical field [0001] The invention belongs to the technical field of shield TBM mechanical construction, and in particular relates to a method for judging the tunneling state of a hard rock tunnel boring machine based on the tunneling specific energy of the hard rock tunnel boring machine. Background technique [0002] With the rapid development of tunnel and underground engineering construction in China, hard rock tunnel boring machine (hereinafter referred to as TBM) has become the most advanced construction equipment in the field of tunnel construction due to its efficient, fast and safe construction characteristics. At the same time, tunnel construction is an engineering construction with high energy consumption and high cost. [0003] According to statistics, hard rock TBM consumes hundreds of millions of kilowatts of electric energy per day. Combined with various mechanical losses of equipment and tool wear consumption, hard rock TBM consumes millions of dollars of e...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 王立辉亢一澜张茜侯振德蔡宗熙曲传咏
Owner MILITARY TRANSPORTATION UNIV PLA
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