Simulation modeling for monitoring the plane stressed state of a rock mass based on the acoustic emission memory effect around a borehole

1995 ◽  
Vol 31 (5) ◽  
pp. 355-359 ◽  
Author(s):  
V. L. Shkuratnik ◽  
A. V. Lavrov
Keyword(s):  
Acoustic Emission ◽  
Rock Mass ◽  
Stressed State ◽  
Memory Effect ◽  
Simulation Modeling ◽  
Plane Stressed State

scholarly journals Influence of unloading slots on the stressed state and creep of a rock mass in the vicinity of an excavation

2011 ◽  
Vol 4 (2) ◽  
pp. 110-118 ◽  
Author(s):  
V.M. Pestrenin ◽  
I.V. Pestrenina ◽  
P.P. Kostromina
Keyword(s):  
Rock Mass ◽  
Stressed State

Precursors and power-law statistics of acoustic emission and shape memory effect in martensites

2004 ◽  
Vol 70 (22) ◽  
Author(s):  
S. Sreekala ◽  
Rajeev Ahluwalia ◽  
G. Ananthakrishna
Keyword(s):  
Acoustic Emission ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Power Law

Mechanical Luminescence Study of Composite Fracture in a Plane-Stressed State

1982 ◽  
pp. 411-426
Author(s):  
G. A. Teters ◽  
U. E. Krauja ◽  
R. B. Rikards ◽  
Z. T. Upitis
Keyword(s):  
Stressed State ◽  
Plane Stressed State ◽  
Luminescence Study

scholarly journals The results of monitoring of hydroimpulsive disintegration of outburst-prone coal seams using ZUA-98 system

2020 ◽  
Vol 168 ◽  
pp. 00068
Author(s):  
Vasyl Zberovskyi ◽  
Kostiantyn Sofiiskyi ◽  
Rishard Stasevych ◽  
Artem Pazynych ◽  
Jan Pinka ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Rock Mass ◽  
Coal Seam ◽  
High Frequency ◽  
Strain State ◽  
Monitoring And Evaluation ◽  
Dynamic State ◽  
Coal Seams ◽  
Gas Dynamic ◽  
Mine Workings

The paper represents the results of monitoring and evaluation of the efficiency of hydroimpulsive disintegration of outburst-prone coal seams in the stopes of development mine workings using a system of sound detecting facilities. Methods of acoustic emission control have been considered as well as the monitoring tasks to evaluate rock mass conditions before the procedure and after it inclusive of the results of sound accompaniment of hydraulic disintegration of the coal seam. It has been determined that the higher concentration of stresses within the rock mass is, the more efficient action of high frequency self-oscillations of cavitation transmitter is on both the fissuring and changes in gas-dynamic state of the coal seam. It has been recommended to apply a mode of impulsive fluid pumping under the conditions where coal seam is in the stress-strain state.

scholarly journals Failure warning of hydrous sandstone based on electroencephalogram technique

2018 ◽  
Vol 38 ◽  
pp. 02015
Author(s):  
Kai Tao ◽  
Wei Zheng
Keyword(s):  
Computed Tomography ◽  
Acoustic Emission ◽  
Rock Mass ◽  
Real Time ◽  
Assessment Methods ◽  
Structural Failure ◽  
Failure Assessment ◽  
Electroencephalogram Eeg

Sandstone is a type of rock mass that widely exists in nature. Moisture is an important factor that leads to sandstone structural failure. The major failure assessment methods of hydrous sandstone at present cannot satisfy real-time and portability requirements, especially lacks of warning function. In this study, acoustic emission (AE) and computed tomography (CT) techniques are combined for real-time failure assessment of hydrous sandstone. Eight visual colors for warning are screened according to different failure states, and an electroencephalogram (EEG) experiment is conducted to demonstrate their diverse excitations of the human brain’s concentration.

scholarly journals Investigation for Influences of Seepage on Mechanical Properties of Rocks Using Acoustic Emission Technique

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Saisai Wu ◽  
Xiaohan Zhang ◽  
Junping Li ◽  
Zhao Wang
Keyword(s):  
Mechanical Properties ◽  
Acoustic Emission ◽  
Rock Mass ◽  
Shear Failure ◽  
Great Influence ◽  
Average Energy ◽  
Acoustic Emission Technique ◽  
Failure Patterns ◽  
Initial Rupture ◽  
Emission System

The behavior of rock mass is governed by the properties of both the rock material and discontinuities in the rock mass. Surrounding environments including the existence of water also have a great influence on the behavior and mechanical properties of rocks. In this study, a novel-designed compression and seepage testing system, associated with an acoustic emission system, was designed and constructed. The changes in the specimens resulting from the uniaxial compression were monitored by an acoustic emission technique. The characteristics of the acoustic emission parameters at different stages including compaction and crack initiation, crack propagation, and catastrophic failure were analyzed. The existence of seepage had direct influences on the mechanical properties and failure patterns of the specimens. The specimens tested in pure compression conditions demonstrated strong burst proneness and ruptured into separate pieces, while for the specimens with seepage, no burst proneness was observed and the specimens tended to fail along a macroscopic shear failure plane. The highest average energy of the acoustic signal occurred at the stage of initial rupture of rock specimens, rather than at the stage of widespread rupture. The studies explored the possibilities of using the acoustic emission technique to investigate the problems associated with the seepage in geotechnical and rock engineering and provided meaningful results for further research in this field.

Equilong-term strength surfaces of organic textolite in the plane stressed state

1979 ◽  
Vol 15 (1) ◽  
pp. 40-45
Author(s):  
R. D. Maksimov ◽  
E. A. Sokolov ◽  
�. Z. Plume
Keyword(s):  
Stressed State ◽  
Term Strength ◽  
Plane Stressed State
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