Title:
METHOD FOR POSITIONING MAIN CRACK OF COAL ROCK IN DYNAMIC DISASTER PRECURSOR OF COAL ROCK BY MEANS OF ELECTROMAGNETIC RADIATION
Document Type and Number:
WIPO Patent Application WO/2019/085384
Kind Code:
A1
Abstract:
A method for positioning the main crack of a coal rock in a dynamic disaster precursor of the coal rock by means of electromagnetic radiation, comprising: providing four or more three-component electromagnetic sensors in an underground roadway, each sensor consisting of three directional electromagnetic signal receiving antennas orthogonal to each other, acquiring electromagnetic signals by means of a monitoring host, and using an atomic clock to ensure that the signals received by different sensors are strictly synchronous; using the frequency of the electromagnetic signals as feature parameters, selecting and ensuring that electromagnetic signals generated by the same crack are received by different antennas, separately performing vector overlay on the signal intensity of three channels of each electromagnetic signal sensor, and determining the direction of a magnetic induction line of the position of the sensor; obtaining, according to the direction of the magnetic induction line, a propagation direction plane perpendicular to said direction; and determining the position of the crack of a coal rock by means of the intersection of the electromagnetic propagation direction planes determined by the plurality of sensors.
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Inventors:
SONG DAZHAO (CN)
HE XUEQIU (CN)
LI ZHENLEI (CN)
WEI MENGHAN (CN)
LOU QUAN (CN)
WANG ANHU (CN)
HE XUEQIU (CN)
LI ZHENLEI (CN)
WEI MENGHAN (CN)
LOU QUAN (CN)
WANG ANHU (CN)
Application Number:
PCT/CN2018/081211
Publication Date:
May 09, 2019
Filing Date:
March 30, 2018
Export Citation:
Assignee:
UNIV BEIJING SCIENCE & TECHNOLOGY (CN)
ZHONG AN ACADEMY OF SAFETY ENG (CN)
ZHONG AN ACADEMY OF SAFETY ENG (CN)
International Classes:
G01S5/04
Domestic Patent References:
| WO2012169937A2 | 2012-12-13 |
Foreign References:
| CN107843874A | 2018-03-27 | |||
| CN105807256A | 2016-07-27 | |||
| CN103197356A | 2013-07-10 | |||
| CN103995296A | 2014-08-20 | |||
| CN104090306A | 2014-10-08 | |||
| CN106970424A | 2017-07-21 |
Attorney, Agent or Firm:
BEIJING GUANGYOU PATENT FIRM CO.,LTD (CN)
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