-
Estimating Some Mechanical Properties Of Rock From In-situ Rebound Values
[A CASE STUDY OF OREKE OPEN PIT QUARRY] -
-
-
CHAPTER FOUR
4.0 RESULT AND DISCUSSION
4.1 RESULTS
This work is essentially based on data collected from the study location, which is an outcrop close to Oreke Dolomite Deposit, Kwara State. The data were collected by the means of N-type rebound hammer. Considering the fact that most of the model employed in this study are based on L-type rebound data, the N-type rebound data collected were subsequently converted to L-type data. This was done by using the correlation relationship proposed by Aday and Goktan (1992). It is on record that they have carried out a very comprehensive work on the comparison of N and L type hammer.
Their equation is stated below.
"R" _"n" ("N" )"=7.124+1.249 " "R" _"n" " (L)"
Where Rn (N) is the N – type rebound number
And Rn (L) is the L –type rebound number
4.1.1 DETERMINATION OF BULK DENSITY
The table below show the value of samples calculated in the laboratory gotten from Oreke open pit quarry.
-
-
-
ABSRACT - [ Total Page(s): 1 ]ABSTRACTThe research deals with estimating some mechanical properties of rock from in-situ rebound value in Oreke open pit quarry ,N-Type Schmidt rebound hammer data were collected from Oreke open pit .the data were collected with the view to ascertain the suitability of Schmidt hammer for quick ,cheap and less cumber some estimation of the uniaxial compressive strength of marble .The data collection was strictly carried out by ASTM and suggested equation by different authors. UNIAXIAL COMPRES ... Continue reading---
LIST OF TABLES - [ Total Page(s): 1 ]LIST OF TABLESTABLES 4.1: Determination of Bulk Density for Location 4.2: Density Test Result for Location 4.3: Density Test Result for Location 4.4: Field Rebound Values 4.5: Standard Procedure of Bulk Density Determination 4.6: Standard for Uniaxial Compressive Strength (UCS) ... Continue reading---
LIST OF FIGURES - [ Total Page(s): 1 ]LIST OF FIGURESFIGURES 1: Details of an L type Schmidt hammer 2: Conversion Graph ... Continue reading---
TABLE OF CONTENTS - [ Total Page(s): 1 ]TABLE OF CONTENTSTITLE PAGE CERTIFICATION DEDICATION ACKNOWLEDGEMENT TABLE OF CONTENTS LIST OF TABLES LIST OF FIGURES CHAPTER ONE 1.0 INTRODUCTION 1.1 AIM AND OBJECTIVES 1.2 STATEMENT OF THE PROBLEM 1.3 SCOPE OF THE PROJECT 1.4 JUSTIFICATION OF THE PROJECT 1.5 LOCATION OF THE STUDY AREA CHAPTER TWO 2.0 LITERATURE REVIEW 2.1 CONCEPT OF SCHMIDT REBOUND HAMMER 2.2 GEOLOGICAL FORMATION OF MARBLE 2.3 MECHANICAL PROPERTIES OF MARBLE ... Continue reading---
CHAPTER ONE - [ Total Page(s): 1 ]CHAPTER ONE 1.0 INTRODUCTIONRock mechanics engineers design structures built in rock for various purposes, and therefore need to determine the properties and behavior of the rock. The UCS of rocks is one of the important input parameters used in rock engineering projects such as design of underground spaces, rock blasting, drilling, slope stability analysis, excavations and many other civil and mining operations. ISRM (1981) testing of this mechanical property in the laboratory is a si ... Continue reading---
CHAPTER TWO - [ Total Page(s): 3 ]CHAPTER TWO2.0 LITERATURE REVIEW A literature review revealed that most of the empirical equations introduced for determination of the Uniaxial Compressive Strength (UCS) of rocks based on the Schmidt hammer rebound number (N) are not sufficiently reliable mostly due to the relatively low coefficient of correlations. This is attributed to the fact that in most cases one formula is used for all types of rocks, although the density of rocks is introduced to the formulae in some cases. On the ... Continue reading---
CHAPTER THREE - [ Total Page(s): 2 ]CHAPTER THREE3.0 RESEARCH METHODOLOGY (DESK WORK)The research methodology is the general research strategy that outlines. The way in which research is to be undertaken and among other things, identifies the methods to be used in it. These methods, described in the methodology, define the means or mode of data collection or sometimes, how a specific result is to be calculated. Methodology also is the systematic theoretical analysis of the methods applied to a field of study.Therefore, the N ... Continue reading---
CHAPTER FIVE - [ Total Page(s): 1 ]CHAPTER FIVE5.0 CONCLUSION AND RECOMMENDATION5.1 CONCLUSIONThe need to test rock in order to determine their physical and mechanical properties cannot be overemphasized .However , laboratory testing procedures and equipment may be required to do this for engineering project .Hence, the Schmidt rebound hammer (RN) has being used by many researchers to measure the strength and other engineering properties of rocks. This usually enables a quick and easy means of measurement. Marble be ... Continue reading---
REFRENCES - [ Total Page(s): 1 ]REFERENCESAggestalis, G, Alivazators, (2000) Correlating Uniaxial Compressive Strength with Schmidt Hammer Rebound Number, Journal of Bulleting Engineering Geology, Vol. 5,4, ppg 3 – 11.ASTM, (2001) Standard Method for Determination of Rock Hardness of Rebound Hammer Method, ASTM Stand 04.09(D5873-00).ASTM. D-5873(2005) Standard Test Method for Determination of Rock Hardness by Rebound Value Method.Aufmuth, E.R. (2002). A Systematic Determination of Engineering Criteria for Rocks. Journal ... Continue reading---
-
ABSRACT - [ Total Page(s): 1 ]ABSTRACTThe research deals with estimating some mechanical properties of rock from in-situ rebound value in Oreke open pit quarry ,N-Type Schmidt rebound hammer data were collected from Oreke open pit .the data were collected with the view to ascertain the suitability of Schmidt hammer for quick ,cheap and less cumber some estimation of the uniaxial compressive strength of marble .The data collection was strictly carried out by ASTM and suggested equation by different authors. UNIAXIAL COMPRES ... Continue reading---