Unlock instant, AI-driven research and patent intelligence for your innovation.

Detection device and detection method for unidentified gob

A detection device and goaf technology, applied in the field of mine detection, can solve the problems of false positives and insensitivity

Inactive Publication Date: 2016-05-18
LIAONING TECHNICAL UNIVERSITY
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-density electrical method and transient electromagnetic method are sensitive to filled low-resistance goafs, but are extremely insensitive to unfilled high-resistance goafs, which are often underreported

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
  • Detection device and detection method for unidentified gob
  • Detection device and detection method for unidentified gob

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1. An unknown goaf detection device includes a main control computer, several ultrasonic detectors, and several mechanical vibration sources. The main control unit and the ultrasonic detector are connected by cable or wireless communication. Several ultrasonic detectors and several mechanical vibration sources are arranged on a horizontal line of the area to be detected. The number of channels of the main control unit is within 24.

[0018] The specific steps of an unknown goaf detection method are as follows: figure 1 Shown:

[0019] Step 1, arrange several ultrasonic detectors and several mechanical seismic sources at intervals along a horizontal line in the area to be detected, and arrange a mechanical seismic source every other ultrasonic detector. If the wavelength of the seismic wave excited by the mechanical seismic source is λ, the ultrasonic detector The distance between them is not greater than 1 / 4 of the seismic wave wavelength λ, and the total ar...

Embodiment 2

[0025] Embodiment 2. An unknown goaf detection device includes a main control computer, several ultrasonic detectors, and several mechanical vibration sources. The main control unit and the ultrasonic detector are connected by cable or wireless communication. Several ultrasonic detectors and several mechanical vibration sources are arranged on a horizontal line of the area to be detected. The number of channels of the main control unit is more than 32.

[0026] The specific steps of an unknown goaf detection method are as follows: figure 2 Shown:

[0027] Step 1. Arrange several ultrasonic detectors at intervals along a horizontal line in the area to be detected, and arrange two mechanical sources at the positions of the head and tail ultrasonic detectors, or arrange several ultrasonic detectors and detectors at intervals along a horizontal line in the area to be detected. 1 mechanical seismic source, if the wavelength of the seismic wave excited by the mechanical seismic so...

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 provides a detection device and a detection method for an unidentified gob and belongs to the field of mine pit survey. The device comprises a main control computer, a plurality of ultrasonic detectors and a plurality of mechanical vibration sources. The main control computer is in connection with the ultrasonic detectors via a cable or in the wireless communication manner. The ultrasonic detectors and the mechanical vibration sources are arranged on a horizontal line of a to-be-detected region. The underground vibration information in the to-be-detected region is acquired by the ultrasonic detectors and the mechanical vibration sources. The main control computer is used for conducting the digital pre-treatment on the underground vibration information and filtering clutters so as to obtain an energy distribution spectrum of scattered waves and reflected waves through calculation and determine an optimal wave velocity distribution spectrum of different sections and different depths in the to-be-detected region. After that, a synthetic aperture migration imaging is conducted based on the energy distribution spectrum of scattered waves and reflected waves, and the optimal wave velocity distribution spectrum. Finally, the underground gob and karst can be identified based on images after the migration stacking process. According to the technical scheme of the invention, the gob can be effectively discovered. The device and the method are applicable to not only large and continuous interfaces, but also occasions with transversely acute changes.

Description

technical field [0001] The invention belongs to the field of mine detection, and in particular relates to a detection device and method for an unknown mined-out area. Background technique [0002] At the end of the 20th century, the order of my country's mining industry was relatively chaotic, and illegal and disorderly mining and indiscriminate mining left a large number of goafs in some mines and their surrounding areas. As time goes by, groundwater and gas fill the goaf, and once it is dug through, it will cause mine disasters such as water seepage and gas explosion. Due to the characteristics of strong concealment, poor regularity of spatial distribution characteristics, and unpredictable roof collapse in goafs, coal mine disasters caused by goafs have occurred frequently. The accident was caused by the flooding of the roadway due to the excavation of the goaf. Therefore, how to investigate the distribution range and spatial shape characteristics of underground mined-o...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/00G01V1/30
CPCG01V1/00G01V1/306G01V2210/624
Inventor 张大明张立新李刚乔宁秦洪岩李洋郭超
Owner LIAONING TECHNICAL UNIVERSITY