A roadway support method based on dynamic load

A roadway support and dynamic load technology is applied in the prevention and control of rock bursts and rock bursts, and in the field of strong mine earthquakes. dangerous effect

Active Publication Date: 2022-02-18
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a roadway support method based on dynamic load to solve the technical problem that the existing roadway support method does not consider the dynamic load when designing the roadway support, resulting in poor stability of the roadway

Method used

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  • A roadway support method based on dynamic load
  • A roadway support method based on dynamic load
  • A roadway support method based on dynamic load

Examples

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no. 1 example

[0048] see figure 1 and figure 2, this embodiment provides a roadway support method based on dynamic load, the execution flow of the roadway support method is as follows figure 1 shown, including the following steps:

[0049] S1, monitor the mine earthquake event, obtain the source location, mine earthquake energy level and seismic wave data of the mine earthquake event;

[0050] S2, constructing a three-dimensional numerical model of the mine according to the real geological conditions of the mine;

[0051] S3, apply seismic wave data to the source position of the three-dimensional numerical model, and perform dynamic load simulation calculations to obtain the rock mass when the rock mass is pushed out from the roadway surrounding rock in the mine roadway support area under different mine seismic energy levels and distance d. Kinetic energy E d ; Among them, the distance d is the distance from the seismic source to the roadway wall;

[0052] S4, based on the dynamic loa...

no. 2 example

[0077] see Figure 3 to Figure 7 , this embodiment uses a specific application example as an example to describe in detail the implementation process and final effect of the roadway support method based on dynamic load of the present invention. Mining by top-coal caving in sections, the coal mining height is 3m, and the coal caving height is 22m. In this embodiment, the location, energy level and original vibration waveform of mine earthquake events monitored by the microseismic monitoring system of a working face with the risk of rock burst from October 24, 2016 to May 26, 2017 are used as the original data. The method of the present invention processes and analyzes the original data, performs dynamic load simulation calculations, and finally realizes an optimized roadway support scheme. The implementation process is as follows:

[0078] (1) Arrange microseismic monitoring system to monitor mine earthquake events.

[0079] (2) The location and energy level of mining earthqu...

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Abstract

The invention discloses a roadway support method based on dynamic load, which includes: monitoring mine earthquake events, obtaining source location, mine earthquake energy level and shock wave data; constructing a three-dimensional numerical model of the mine according to the real geological conditions of the mine; The shock wave data is applied at the source position of the earthquake, and the dynamic load simulation calculation is carried out to obtain the kinetic energy E d ; Among them, the distance d is the distance from the seismic source to the roadway wall; construct E d The functional relationship with the mine earthquake energy level and distance d; according to the distribution of mine earthquakes with different energy levels in specific mines, optimize the roadway support layout and determine a reasonable support plan to improve the stability of the surrounding rock. The invention can precisely enhance the support strength of the roadway, improve the stability of the surrounding rock of the roadway, optimize the support layout, and is suitable for mine roadway support design where mine earthquakes and rock bursts occur frequently.

Description

technical field [0001] The invention relates to the technical field of disaster prevention and control of strong mine earthquakes, rockbursts and rock bursts, in particular to a roadway support method based on dynamic loads. Background technique [0002] As the main dynamic disasters in non-coal mines and coal mines, rockburst and rockburst are very destructive, often causing shaft damage, casualties, and equipment damage. As the demand for mineral resources continues to increase with economic development, the mining depth increases year by year. The harsh geomechanical environment of "three highs and one disturbance" in deep engineering makes the situation of rockburst and rockburst disasters more severe, and the intensity and frequency of occurrence are on the increase. At the same time, due to stress concentration and frequent occurrence of mining earthquakes, roadway maintenance poses greater challenges. The research on roadway support has become a hot topic in the min...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): E21F17/00E21F17/18G06F30/20
CPCE21F17/00E21F17/18G06F30/20
Inventor何生全何学秋宋大钊李振雷
OwnerUNIV OF SCI & TECH BEIJING