scholarly journals Non-destructive testing of rock bolt fastening as an element of monitoring the state of mine workings

2019 ◽  
Vol 13 (1) ◽  
pp. 16-23 ◽  
Author(s):  
S Skipochka ◽  
◽  
O Krukovskyi ◽  
V Serhiienko ◽  
I Krasovskyi ◽  
...  
Keyword(s):  
The State ◽  
Rock Bolt ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Mine Workings ◽  
Non Destructive

8 Years Working of ENTRAP’s Working Group on Non-Destructive Testing of Waste Packages

2001 ◽  
Author(s):  
M. Bruggeman ◽  
P. Van Iseghem ◽  
R. Odoj ◽  
Ch. Lierse von Gostomski ◽  
R. Dierckx
Keyword(s):  
Nuclear Waste ◽  
Information Exchange ◽  
Working Group ◽  
The State ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
European Organisation ◽  
Eu Member States ◽  
Working Groups ◽  
Non Destructive

Abstract ENTRAP is a European organisation grouping nuclear waste quality checking laboratories from different EU member states. The main objectives of ENTRAP are information exchange and harmonisation between the laboratories. ENTRAP works on different aspects of quality checking of nuclear waste packages. The working items are treated in different working groups and one of these working groups is WGA, dealing with non-destructive assay techniques for waste packages. This paper discusses the main achievements made by WGA, and gives a summary of the state-of-the-practice of assay techniques used for quality checking of nuclear waste packages in the different member laboratories.

A Review of Acoustic Emission Technique for Machinery Condition Monitoring: Defects Detection & Diagnostic

2012 ◽  
Vol 229-231 ◽  
pp. 1476-1480 ◽  
Author(s):  
Salah M. Ali Al-Obaidi ◽  
M. Salman Leong ◽  
R.I. Raja Hamzah ◽  
Ahmed M. Abdelrhman
Keyword(s):  
Acoustic Emission ◽  
Condition Monitoring ◽  
State Of The Art ◽  
The State ◽  
Non Destructive Testing ◽  
Testing Methods ◽  
Acoustic Emission Technique ◽  
Destructive Testing ◽  
Machinery Condition Monitoring ◽  
Non Destructive

Acoustic emission (AE) measurements are one of many non-destructive testing methods which had found applications in defects detection in machines. This paper reviews the state of the art in AE based condition monitoring with particular emphasis on rotating and reciprocating machinery applications. Advantages and limitations of the AE technique in comparison to other condition monitoring techniques in detecting common machinery faults are also discussed.

scholarly journals Physical modeling of the rock bolt interaction with the rock massif

2019 ◽  
Vol 123 ◽  
pp. 01002 ◽  
Author(s):  
Serhii Skipochka ◽  
Oleksandr Krukovskyi ◽  
Viktor Serhiienko ◽  
Ihor Krasovskyi
Keyword(s):  
Physical Modeling ◽  
Rock Bolt ◽  
Rock Massif ◽  
Informative Parameter ◽  
Special Test ◽  
Free Oscillations ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive

The results of the physical modeling of the “rock bolt – rock massif” system are presented. The characteristics of rock bolt free oscillations depending on the degree of its clamping and tension were studied on special test benches. Oscillations were caused by a single hit to the rock bolt end. It has been established, that the relaxation time of rock bolt free oscillations is the most informative parameter for non-destructive testing. Experimental dependences, that connect the informative parameter with the characteristics of the rock bolt fastening quality, have been determined. An optimal scheme for registering the oscillations in the “rock bolt – rock massif” system is proposed. The basic data has been obtained to substantiate the method of non-destructive testing the quality of rock bolt fastening.

Non-Destructive Testing of Steel Wire Rope Transmission Area to Rope End by Magnetic Flux Leakage

2014 ◽  
Vol 683 ◽  
pp. 39-44 ◽  
Author(s):  
Pavel Peterka ◽  
Jozef Krešák ◽  
Stanislav Kropuch ◽  
Andrea Bérešová ◽  
Dušan Mitrík
Keyword(s):  
Magnetic Flux ◽  
Steel Wire ◽  
The State ◽  
Point Of View ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Steel Material ◽  
Transmission Area ◽  
Non Destructive ◽  
Flux Leakage

At present the need of nondestructive testing of rope bridges state appears often. Modern maintenance trends using non-destructive checking allow to detect the state of these materials in service without breaking their integrity. From the point of view of so far used non-destructive testing methods the area of cable end is not accessible. The magnetic properties research of these materials and the subsequent design of new structures for scanning elements will enable non-destructive monitoring of the state of the ropes steel material of static constructions, especially their anchoring. The article aims to present the results from tracking of the magnetic flux around the cable end and signal runs from particular designed and investigated scanning elements placed above artificial defects created closely to the cable end.

Non destructive testing of works of art by terahertz analysis

2013 ◽  
Vol 64 (2) ◽  
pp. 21001 ◽  
Author(s):  
Jean-Luc Bodnar ◽  
Jean-Jacques Metayer ◽  
Kamel Mouhoubi ◽  
Vincent Detalle
Keyword(s):  
Non Destructive Testing ◽  
Destructive Testing ◽  
Works Of Art ◽  
Non Destructive
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