Title:
DIFFRACTED WAVE-BASED DETECTION METHOD FOR SMALL-SIZED COLLAPSE PILLAR OF STOPE FACE
Document Type and Number:
WIPO Patent Application WO/2017/197663
Kind Code:
A1
Abstract:
A diffracted wave (7)-based detection method for a small-sized collapse pillar of a stope face (5), comprising the steps of: setting a shot point (2) in the middle of one side of a belt roadway (1), exciting seismic waves, arranging ten wave detection points (4) (i.e., 1#-10#) in a corresponding track roadway (3), and obtaining seismic record by means of a seismograph; respectively obtaining direct waves (6) of the wave detection points 1#-10# and diffracted waves (7) of a small-sized collapse pillar from the seismic record according to a sequence of propagation time of the seismic waves; separately searching for time ti corresponding to a maximum amplitude value in trains of diffracted waves received at the wave detection points 1#-10#; determining transverse and longitudinal positions of the small-sized collapse pillar; and finally determining an actual position of the center of the small-sized collapse pillar according to the determined transverse and longitudinal coordinate positions. The detection method can be used for positioning small-sized collapse pillars accurately, is low in cost and easy to operate, fills the blank of a method for detecting a small-sized collapse pillar using a geophysical method in an underground coal mine, and can play an active role in guiding safe stope operation of a working surface.
Inventors:
WANG BO (CN)
LIU SHENGDONG (CN)
ZHOU FUBAO (CN)
HUANG LANYING (CN)
ZHANG JUN (CN)
JIANG YONGHU (CN)
HAO JIALIN (CN)
YU SENLIN (CN)
ZHANG XIAYANG (CN)
LIU SHENGDONG (CN)
ZHOU FUBAO (CN)
HUANG LANYING (CN)
ZHANG JUN (CN)
JIANG YONGHU (CN)
HAO JIALIN (CN)
YU SENLIN (CN)
ZHANG XIAYANG (CN)
Application Number:
PCT/CN2016/083990
Publication Date:
November 23, 2017
Filing Date:
May 31, 2016
Export Citation:
Assignee:
UNIV CHINA MINING (CN)
International Classes:
G01V1/30
Foreign References:
| CN103217719A | 2013-07-24 | |||
| CN102928869A | 2013-02-13 | |||
| CN103235334A | 2013-08-07 | |||
| US20100131205A1 | 2010-05-27 | |||
| CN103245977A | 2013-08-14 |
Other References:
YANG, DEYI ET AL.: "Diffraction waves from fallen pillars", GEOPHYSICAL PROSPECTING FOR PETROLEUM, vol. 39, no. 4, 31 December 2000 (2000-12-31)
CUI, WEIXIONG ET AL.: "Study on Amplitude Characteristics of Seismic Diffraction Wave", ENERGY TECHNOLOGY AND MANAGEMENT, vol. 39, no. 4, 30 April 2014 (2014-04-30)
CUI, WEIXIONG ET AL.: "Study on Amplitude Characteristics of Seismic Diffraction Wave", ENERGY TECHNOLOGY AND MANAGEMENT, vol. 39, no. 4, 30 April 2014 (2014-04-30)
Attorney, Agent or Firm:
XUZHOU HUAIHAI PATENT AGENCY (CN)
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