Estimating Some Mechanical Properties of Rock From In-Situ Rebound Values (A Case Study of Oreke Open Pit Quarry)

ABSTRACT

The 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 COMPRESSIVE STRENGTH, DENSITY, YOUNG MODULUS were determined using value conversion graph. UNIAXIAL COMPRESSIVE STRENGTH for location 1 was 70MPa which mean the rock is medium in classification and location 2 and 3 was 55MPa which also mean the rock marble medium is classification and typical rock, type is competent metamorphic  rock.

TABLE OF CONTENTS

TITLE PAGE                                                                                                                 i

CERTIFICATION   ii

DEDICATION   iii

ACKNOWLEDGEMENT  iv

TABLE OF CONTENTS  vi

LIST OF TABLES  viii

LIST OF FIGURES  ix

CHAPTER ONE   1

1.0           INTRODUCTION   1

1.1           AIM AND OBJECTIVES.2

1.2           STATEMENT OF THE PROBLEM    2

1.3           SCOPE OF THE PROJECT  3

1.4           JUSTIFICATION OF THE PROJECT  3

1.5           LOCATION OF THE STUDY AREA   3

CHAPTER TWO   4

2.0           LITERATURE REVIEW    4

2.1           CONCEPT OF SCHMIDT REBOUND HAMMER   4

2.2           GEOLOGICAL FORMATION OF MARBLE  8

2.3           MECHANICAL PROPERTIES OF MARBLE  11

CHAPTER THREE   14

3.0           RESEARCH METHODOLOGY (DESK WORK)14

3.1           DETERMINATION OF BULK DENSITY   14

3.2           PROCEDURE FOR COLLECTING REBOUND HAMMER VALUE  15

3.3           CONVERTED FROM N – L TYPE DATA   16

3.4           ESTIMATING UNIAXIAL COMPRESSIVE STRENGTH OF MARBLE (UCS)16

3.5           ESTIMATING OF DENSITY   18

3.6           ESTIMATING OF YOUNG’S MODULUS  19

CHAPTER FOUR   21

4.0           RESULT AND DISCUSSION   21

4.1           RESULTS  21

4.1.1       DETERMINATION OF BULK DENSITY   21

4.1.2       PROCESSING PROCEDURE  24

4.1.3       CONVERTED FROM N-TYPE TO L-TYPE DATA   25

4.1.4       ESTIMATION UNIAXIAL COMPRESSIVE STRENGTH   26

4.1.5       ESTIMATED DENSITY   28

4.2           ESTIMATED YOUNGʹS MODULUS  29

4.3           DISCUSSION   31

CHAPTER FIVE   32

5.0           CONCLUSION AND RECOMMENDATION   32

5.1         CONCLUSION   32

5.2         RECOMMENDATION   32

              REFERENCES  33