Point Load Test (PLT) has been applied to evaluating mine wall stability as well [21]. It has been suggested in the literature that there is a relationship between Point Load index (PLI) and USC for various rocks [11], but not for oil shale.
Sep 01, 2010· In situ estimation of roof rock strength using sonic logging In situ estimation of roof rock strength using sonic logging Oyler, David C.; Mark, Christopher; Molinda, Gregory M. 00:00:00 Sonic travel time logging of exploration boreholes is routinely used in Australia to obtain estimates of coal mine roof rock strength. . Because sonic velocity logs are relatively inexpensive and ...
Rating and reviews for Professor Robert Rusnak from Trident Technical College (all campuses) Charleston, ... He lets you use a cheat sheet on each test front and back with information and same with the exam. He also gives you a study guide and questions and on a test are pretty easy and straightforward. ... Load More Ratings No ratings found ...
Rusnak JA, Mark C (1999) Using the point load test to determine the uniaxial compressive strength of coal measure rock. In: Proceedings of 19th international conference .
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Jan 30, 2014· The International Society for Rock Mechanics [26] has established basic procedures for testing point load strength and calculating the point load strength index. The test consists in compressing to failure a core or irregular block of rock sample by applying the point load by a couple of steel conical points of standard size.
A method of determining the susceptibility to ventricular arrhythmias in a subject, the method including determining a reserve of refractoriness (RoR) and a reserve of memory (RoM) and combining the reserve of refractoriness (RoR) and the reserve of memory (RoM) to produce a metric of stabilityofpropagation reserve (SoPR) in the subject, a higher value of SoPR indicating lower susceptibility ...
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USING THE POINT LOAD TEST TO DETERMINE THE . USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL COMPRESSIVE STRENGTH OF COAL MEASURE ROCK John Rusnak, Director of Geology Peabody Group St. Louis, MO Christopher Mark, Rock Mechanics Team Leader Histograms of standard deviations, Uniaxial Compressive Strength. 2 the. strength.
Nov 21, 2018· At first glance, it looks like a 9 trillion time bomb ready to detonate, a corporate debt load that has continued to escalate thanks to easy borrowing terms and a seemingly endless thirst from ...
By improving the uptake of vaccine proteins by DCs or other s, more rapid and robust responses to vaccination can ensue. Targeting antigen to DC surface receptors has emerged as an effective means to load DCs with antigen in vivo (30, 48). The Fc receptors for IgG (FcγRs), expressed on DCs and s, bind and internalize antigenIgG immune ...
The International Society for Rock Mechanics [26] has established basic procedures for testing point load strength and calculating the point load strength index. The test consists in compressing to failure a core or irregular block of rock sample by applying the point load by a .
Oct 01, 2002· We examined the role of the Ca 2+regulated protein phosphatase calcineurin in controlling Ca 2+ signalling in mouse ventricular myocytes. Membrane currents and voltage were measured in single myocytes using the patchclamp technique. Cytoplasmic Ca 2+ concentration ([Ca 2+] i) was measured in cells loaded with the fluorescent Ca 2+ indicators fluo4 or fura2 using a confocal or ...
rock mechanics, used to characterize and study the behavior of solid rocks. A good correlation between the unconfined compressive strength test (UCS) and the point load test (PLT) can be very useful because it allows for faster and cheaper testing than others with the same security to calculate the structures and performances of solid rocks.
USING THE POINT LOAD TEST TO DETERMINE THE . USING THE POINT LOAD TEST TO DETERMINE THE UNIAXIAL COMPRESSIVE STRENGTH OF COAL MEASURE ROCK John Rusnak, Director of Geology Peabody Group St. Louis, MO Christopher Mark, Rock Mechanics Team Leader National Institute for Occupational Safety and Health Pittsburgh, PA ABSTRACT Point load testing is ...
Mining is one of the oldest profession in world. The development and enrichment of society and mankind have experienced a direct relationship with it. The excavation of mineral resources comes with its complexities. The advancement of knowledge and technology have helped to address a lot of issues, yet many challenges remain because of the uncertainties in the earth materials.
This "Cited by" count includes citations to the following articles in Scholar. ... Using the point load test to determine the uniaxial compressive strength of coal measure rock. J Rusnak, C Mark. 126: 2000: Behavior of simulated longwall gob material. DM Pappas, C Mark. 124:
Rusnak J, Mark C (2000) Using the point load test to determine the uniaxial compressive strength of coal measure rock. In: Peng SS, Mark C (eds) Proc 19th Int Conf on Ground Control in Mining, Morgantown, WV, USA, 8–10 Aug 2000, pp 362–371