COMPARISON OF TESTING METHODS FOR ROCK ABRASIVENESS

2013 ◽  
Author(s):  
Milan Labas
Keyword(s):  
Testing Methods ◽  
Rock Abrasiveness

scholarly journals Abrasivity characteristics of rocks from India and Nepal

1995 ◽  
Vol 10 ◽  
Author(s):  
Kiran Karki
Keyword(s):  
Testing Methods ◽  
Indian School ◽  
Indian Coal ◽  
Cerchar Abrasivity Index ◽  
Excavation Process ◽  
Depth Study ◽  
Testing Techniques ◽  
Rock Abrasiveness ◽  
Bihar State ◽  
Selection Of

Over the years, many attempts have been made to define and characterise rock abrasiveness. However, it is found that abrasiveness of rocks is not only difficult to define but also hard to measure. A number of relative rock abrasiveness tests have emerged but their results do not always faithfully reflect the characteristics of the rocks that may be useful in the excavation process. Under the circumstances, an in­ depth study of rock abrasiveness is warranted. The present study may provide additional help to fill a gap in this area. The study has addressed a number of issues on abrasivity of rocks and the objectives included inter-alia the following: 1. Developing and standardising appropriate testing techniques for evaluation of the abrasiveness and microhardness of the mine rocks. 2. Evaluating the abrasivity characteristics of mine rocks from Mosaboni copper mine, Jhinkpani limestone quarry and Indian coal-measure strata, Jharia, all from the Bihar State of India. 3. Evaluating the characteristics of a suite of rocks from Nepal (limestone from Nigale and quartzite from Bhedetar, Dhankuta District, Nepal). In this study a number of testing methods have been used to evaluate rock abrasiveness of rocks, specially the Cerchar Abrasivity Index (CAI), Schimazek Index and Indian School of Mines Abrasivity Test (ISMAT). The tests were performed in the rock mechanics laboratory of Indian School of Mines (ISM), Dhanbad, India. The results of these tests are discussed in detail. Hopefully, this study on abrasivity characteristics of rocks will aid in the selection of appropriate tools and excavation systems thereby enhancing the work performances and reducing the costs in excavations.

Testing methods for extra ocular patient eye covers

1997 ◽  
Author(s):  
David W. Stefanovsky ◽  
Luis Ruiz ◽  
R. James Rockwell
Keyword(s):  
Testing Methods

FENOMENA ANAK LOGAM DI PELABUHAN PENYEBERANGAN KETAPANG (MENCARI AKAR MASALAH DAN MODEL PENANGGULANGANNYA)

2019 ◽  
Vol 1 (1) ◽  
pp. 24-36
Author(s):  
I Wayan Pardi ◽  
Ni Made Nadia Suta Pradhani
Keyword(s):  
Qualitative Research ◽  
Research Method ◽  
Family Factors ◽  
Testing Methods ◽  
Validity Testing ◽  
Number Of Factors ◽  
Data Validity ◽  
Family Centered ◽  
Collection Methods ◽  
Data Analysis Methods

This study aims to analyze the background of the emergence of metal children in the Ketapang ferry port, and formulate a model that can be used to overcome the presence of metal children in the Ketapang ferry port. The method used in this study is a qualitative research method, the steps of which include determining the location of research, the method of determining informants, research instruments, data collection methods, data validity testing methods, and data analysis methods. The results showed that there were a number of factors that caused the emergence of metal children at Ketapang Port of Spread, namely 1) poverty factors, 2) family factors, 3) peer or playmate factors, and 4) education factors. Models that can be used to tackle the presence of metal children are Street-centered intervention, Family-centered intervention, Institutional-centered intervention, and Community-centered intervention.

A standard set of testing methods reliably enumerates spores across commercial milk powders

2020 ◽  
Author(s):  
S.I. Murphy ◽  
D. Kent ◽  
J. Skeens ◽  
M. Wiedmann ◽  
N.H. Martin
Keyword(s):  
Testing Methods ◽  
Standard Set ◽  
Commercial Milk
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