Surrounding rock plastic zone size-based quantitative roadway support design method

A technology of roadway support and quantitative design, which is applied in the direction of design optimization/simulation, calculation, mining equipment, etc., can solve the problem of economical or safety deterioration of roadway support, failure to adapt to surrounding rock roadway support strength excess or support Insufficient strength and other issues

Active Publication Date: 2018-05-22
XIAN UNIV OF SCI & TECH
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Problems solved by technology

[0005] However, most of the surrounding rocks of coal mine underground roadways are coal-measure sedimentary rock formations. Due to the complexity and variability of sedimentary rock formations, coupled with the influence of the superimposed stress field of the original in-situ stress field and the mining stress field generated by mining, the existing In the design of support parameters, only one support parameter is adopted for a roadway, which makes it unable to adapt to the ever-changing support requirements of surrounding rocks, resulting in excess or insufficient support strength of the roadway, making the roadway support protection economy or safety deterioration

Method used

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  • Surrounding rock plastic zone size-based quantitative roadway support design method
  • Surrounding rock plastic zone size-based quantitative roadway support design method
  • Surrounding rock plastic zone size-based quantitative roadway support design method

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specific Embodiment

[0199] Concrete embodiment, field application;

[0200] The 11030 working face of a certain mine is a circular roadway that connects the return air trough of the working face and the panel return air alley. The design section radius is 2.4m and the buried depth is about 700m. The roadway surrounding rock is mainly sandy mudstone with an average thickness of 6m. According to the support design method in this paper, after the determination of geomechanical parameters, the radius of the plastic zone of the surrounding rock in different geological conditions of the air return eye is calculated, and the distribution map of the plastic zone of the roadway is obtained. The typical distribution of the plastic zone is as follows figure 2 shown.

[0201] After obtaining the size of the plastic zone, the surrounding rock of the roadway is classified, such as image 3 shown. It can be seen from the classification diagram that the air return eye is mainly classified as Type III, accoun...

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Abstract

The invention discloses a surrounding rock plastic zone size-based quantitative roadway support design method. The method comprises the following steps of: 1, carrying out calculation to determine a size of a radius R of a roadway surrounding rock plastic zone; 2, classifying roadway surrounding rocks according to the calculation result; 3, carrying out targeted support parameter design on different types of surrounding rocks according to the roadway surrounding rock classification result; and 4, modifying and adjusting support parameters according to on-site monitoring feedback information. According to the method, support parameters designed on the basis of plastic zone sizes are scientific and reasonable, and roadway surrounding rock classification is carried out by taking plastic zoneradius sizes as main indexes, so that targeted support parameter design is carried out on different types of surrounding rocks so as to ensure the scientificity and economy of roadway support design.For roadway support, the method is capable of playing a part of preventing roadways from roof fall accidents.

Description

technical field [0001] The invention relates to the technical field of coal mine roadway support safety, in particular to a quantitative design method for roadway support based on the size of the plastic zone of surrounding rock. Background technique [0002] In the 1950s, our country introduced roadway bolting technology in some state-owned mines. For decades, with the continuous development and improvement of bolting theory and bolting materials, bolting has become a coal mine roadway support technology. mainstream technology. However, our country only stays on design methods such as engineering analogy in terms of bolt support design, resulting in poor roadway safety and reliability, and there are hidden dangers that threaten the normal production of coal mines, which greatly limits the development of bolt support technology. Therefore, it is imminent to develop a more scientific, practical and reliable bolt support design method. At present, many scholars at home and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50E21F17/00
CPCE21F17/00G06F30/20
Inventor 李季
Owner XIAN UNIV OF SCI & TECH
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