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Design method for bolting of abscission roof of roadway

A technology of bolt support and design method, which is applied in the directions of calculation, instrument, electrical digital data processing, etc., can solve the problems of increased load, adverse impact of the rod body, hidden safety hazards, stress concentration, etc.

Active Publication Date: 2017-05-24
XIAN TECHNOLOGICAL UNIV
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Problems solved by technology

[0002] During the action of the bolt, the mechanism of the anchoring system is extremely complicated, especially when the surrounding rock has a separation layer, the separation layer will generate additional stress on the rod body, and change the original stress distribution, and stress will appear at the separation layer. Concentration, the phenomenon of increased load, and the adverse effects of the separation layer on the rod body will cause potential safety hazards

Method used

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  • Design method for bolting of abscission roof of roadway
  • Design method for bolting of abscission roof of roadway
  • Design method for bolting of abscission roof of roadway

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Embodiment Construction

[0145] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0146] Such as figure 1 As shown, a design method for roadway detached roof bolt support includes the following steps:

[0147] Step 1. Define the delamination type roof, and judge whether the delamination will occur on the roof through lithology and mechanical model calculations:

[0148] The layered rock mass formed by the unique depositional environment of the coal mine overlying rock, the rock layer is mostly a weak surface in the rock mass structure, and the cracking and shearing slip of the rock layer are prone to separation. The separation layer position and separation value The determination of is the basis of bolt support design;

[0149] Based on the key layer theory and the calculation formula of the composite beam load, the position where the separation layer may occur is judged:

[0150]

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Abstract

The invention discloses a design method for bolting of an abscission roof of a roadway. The method comprises the steps that the abscission roof is defined, and whether the roof will be subjected to abscission or not is judged through lithological and mechanical model calculation; a bolt load is calculated under the separate action of abscission; and bolting parameters are designed. According to the method, a mechanical model is established, the bolt load distribution law of the abscission roof is obtained, and the bolt diameter, inter-row spacing and anchorage length are designed by solving the system bolt load.

Description

technical field [0001] The invention belongs to the technical field of coal mines, and relates to a design method for roof bolt support, in particular to a design method for roadway separation type roof bolt support. Background technique [0002] During the action of the bolt, the mechanism of the anchoring system is extremely complicated. Especially when the surrounding rock has a separation layer, the separation layer will generate additional stress on the rod body and change the original stress distribution. Stress will appear at the separation layer. Concentration, the phenomenon of increased load, and the adverse effects of the separation layer on the rod body will cause potential safety hazards. At present, there is an urgent need for a design method for roadway delamination roof bolt support in the prior art. Contents of the invention [0003] The object of the present invention is to provide a kind of design method of roadway detachment type roof bolt support, thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 丁潇何晖张玉
Owner XIAN TECHNOLOGICAL UNIV
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