Acoustic monitoring method for rock burst risk of coal mine tunnel

A technology of rock burst and coal mine roadway, which is applied in the field of monitoring the risk of rock burst, can solve the problems of impreciseness, high equipment cost, and inability to monitor coal in real time, so as to avoid interference, simple operation, and low cost Effect

Active Publication Date: 2017-03-15
CHINA UNIV OF MINING & TECH
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used methods for monitoring the risk of rock burst mainly include drilling cuttings method, electromagnetic radiation method, microseismic method, wave velocity gradient method, etc., but the monitoring data of electromagnetic radiation method and microseismic met

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Acoustic monitoring method for rock burst risk of coal mine tunnel
  • Acoustic monitoring method for rock burst risk of coal mine tunnel
  • Acoustic monitoring method for rock burst risk of coal mine tunnel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] a. Arrange an explosion-proof acoustic wave instrument 3 in the coal mine roadway 2 in front of the mining face 1, and arrange the detectors 4-9 and the vibration exciter 10 connected with the explosion-proof acoustic wave instrument 3 through wires on the surface of the coal wall of the coal mine roadway 2. 10 is located in the middle of geophones 4-9, and divides the coal body into regions I, II, III, IV, V, and VI; explosion-proof acoustic wave instrument 3 modulates the vibration wave waveform, and geophones 4-9 receive the vibration waves propagating along the coal body in real time signal, the vibrator 10 emits a vibration wave signal modulated by the explosion-proof acoustic wave instrument 3;

[0026] b. In order to avoid the influence of the loose ring in the roadway, waveguide rods 11-17 with a length of 2-5m are drilled into the coal wall at the posit...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an acoustic monitoring method for rock burst risks of a coal mine tunnel. The acoustic monitoring method comprises the steps of: transmitting a characteristic vibration wave signal to a coal mass through setting a vibration exciter, picking up vibration waves propagated in the coal mass by setting detectors, and calculating a longitudinal wave velocity of the coal mass between two adjacent detectors according to a first arrival time difference; and calculating a change rate of a longitudinal wave velocity in a corresponding coal mass region along with the advancing of a stope face during the coal mining process, calculating a corresponding rock burst risk index according to a logarithmic relationship between the coal rock burst risk and the change rate of the longitudinal wave velocity, and grading the rock burst risk index. The acoustic monitoring method can determine rock burst risk regions and risk levels precisely, is simple in operation and low in cost, has good applicability, and is of great significance in selecting reasonable prevention and control measures and guaranteeing safe and efficient mining of the working face.

Description

technical field [0001] The invention relates to a method for monitoring the risk of rock burst, in particular to an acoustic monitoring method for the risk of rock burst in a roadway during the mining process of a coal mine working face. Background technique [0002] Rock burst is one of the most common dynamic disasters in coal mining. It is caused by the rapid release of a large amount of elastic deformation energy accumulated in coal and rock mass. There is generally no obvious macroscopic omen before the occurrence. With the increase of mining depth, the impact Ground pressure disasters are becoming more and more serious, especially in the vicinity of mining roadways, which account for about 80% of the occurrences, which will cause serious consequences such as coal and rock mass damage rushing out and blocking the roadway, casualties, equipment damage, etc., and may also induce gas outbursts and water inrush. Therefore, real-time and accurate monitoring of the risk level...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/62
Inventor 张志镇高峰尚晓吉高亚楠杨玉贵彭维红杜雷鸣卢瀚马文明王坤
Owner CHINA UNIV OF MINING & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap