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E-grāmata: Rock Indentation: Experiments and Analyses [Taylor & Francis e-book]

(Department of Mining Engineering, National Institute of Technology, Surathkal, INDIA)
  • Formāts: 270 pages, 16 Tables, black and white; 97 Line drawings, black and white; 4 Halftones, black and white; 101 Illustrations, black and white
  • Izdošanas datums: 30-Aug-2021
  • Izdevniecība: CRC Press
  • ISBN-13: 9780429019951
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  • Taylor & Francis e-book
  • Cena: 186,77 €*
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  • Standarta cena: 266,81 €
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Rock Indentation: Experiments and AnalysesPalielināt
  • Formāts: 270 pages, 16 Tables, black and white; 97 Line drawings, black and white; 4 Halftones, black and white; 101 Illustrations, black and white
  • Izdošanas datums: 30-Aug-2021
  • Izdevniecība: CRC Press
  • ISBN-13: 9780429019951
Citas grāmatas par šo tēmu:
Taylor & Francis e-booksMore info about Taylor & Francis e-books
Rokasgrāmatas mājas lapa: https://www.taylorfrancis.com/books/9780429019951
This book focusses on rock indentation and importance of specific drilling/cutting energy as a performance indicator for drilling/rock cutting. It aids in designing of drill bits and cutting picks, through performance evaluation for a given geometry. It further covers stress distribution along three axes in rock during load application, correlation of specific energy with properties of rocks and statistical modelling to generate mathematical equation to estimate the specific energy indentation, including performance prediction by artificial neural network modelling. Presented models can be used to assess the specific energy in rock indentation from the physic-mechanical properties of rocks.











Presents synthesis of rock indentation experiments and analyses





Deals with statistical modeling to generate mathematical equations to estimate the specific energy indentation from the rock parameters/properties





Discusses how to find the performance of drill and cutting bits during drilling or cutting operations through indentation test





Covers numerical modeling to explain stress distribution in rock during rock indentation





Includes artificial neural network concepts used in field of rock mechanics

This book is aimed at researchers and graduate students in mining/geological engineering, and mechanical engineering.
Preface xiii
Acknowledgments xv
Author xvii
Chapter 1(1)
Introduction 1(16)
1.1 General
1(3)
1.2 Principle and Phenomenon of Indentation in Rock Drilling/Cutting
4(1)
1.3 Indentation Test and Its Operating Parameters
5(1)
1.4 Studies on Indentation
5(1)
1.5 Studies on Factors Affecting Indentation Process
6(11)
1.5.1 Influence of Static/Quasi-Static Load and Dynamic Load
7(1)
1.5.2 Influence of Rate of Loading or Strain Rate of Penetration
7(1)
1.5.3 Influence of Indenter Geometry
7(1)
1.5.4 Influence of Index Angle
8(1)
1.5.5 Influence of Confining Stress
9(1)
1.5.6 Influence of Properties of Rocks
10(1)
References
10(7)
Chapter 2 Static and Impact Indentation Tests
17(34)
2.1 Introduction
17(1)
2.2 Static and Impact Indentation of Rocks
17(1)
2.3 Static Indentation Test
18(13)
2.3.1 Experimental Procedure
19(7)
2.3.2 Impact Indentation Tests
26(1)
2.3.2.1 Experimental Procedure
26(1)
2.3.2.2 Fabrication of Dynamometer for Measuring Impact Force
26(3)
2.3.2.3 Measurement of Impact Force
29(1)
2.3.2.4 Calibration of the Dynamometer with Respect to Force
29(1)
2.3.2.5 Experimental Procedure
30(1)
2.4 Force-Penetration Curves in Static Indentation
31(20)
2.4.1 Concept of Force-Penetration Curve
39(1)
2.4.2 F-P Curves during Static Indentation Test
40(1)
References
41(10)
Chapter 3 Mechanics of Indentation Fracture
51(36)
3.1 Introduction
51(2)
3.2 Evaluation of Crack Pattern
53(9)
3.2.1 Crack Nucleation
54(1)
3.2.2 Crack Formation
54(1)
3.2.3 Crack Propagation
55(3)
3.2.4 Unloading Cracks
58(1)
3.2.5 Similarity Relations - Loading Half-Cycle
59(2)
3.2.6 Similarity Relations - Unloading Half-Cycle
61(1)
3.3 Crack Paths
62(4)
3.3.1 Crack Pattern with Sharp Cone
62(1)
3.3.2 Crack Path in Spherical Indenters
63(1)
3.3.3 Analysis of Fracture Mechanics in Rock Indentation
63(1)
3.3.4 Sharp Indenters - Median Vent Crack (Propagation)
64(1)
3.3.5 Indenters with Constant Elastic Contact - Cone Crack (Propagation)
65(1)
3.3.6 Spherical Indenters - Cone Crack (Formation)
65(1)
3.4 Measurement of Fracture Parameters
66(1)
3.5 Modeling of Fracture in Indentation
67(5)
3.6 Numerical Analysis of Fracture in Rock Indentation
72(15)
3.6.1 Computational Modeling
74(3)
3.6.2 Modeling of Crack Extension
77(5)
References
82(5)
Chapter 4 Indentation of Rocks and Stress Fields
87(52)
4.1 Introduction
87(1)
4.2 Indentation of Rocks
88(19)
4.2.1 By Wedge-Shaped Indenter (Chisel)
92(1)
4.2.2 By Spherical Indenter
93(2)
4.2.3 By Blunt Indenter
95(3)
4.2.4 By Punch Indenter
98(2)
4.2.5 By Flat Punch and Sphere Indenter
100(6)
4.2.6 By Conical Indenter
106(1)
4.3 Indentation Stress Fields
107(15)
4.3.1 Point-Force Indenters - Boussinesq Elastic Field
109(2)
4.3.2 Spherical Indenters - Hertzian Elastic Field and Its Variants
111(4)
4.3.3 Inelastic Deformation Fields
115(1)
4.3.4 Stress Field in Normal Wedge Indentation in Rocks with Lateral Confinement
116(1)
4.3.5 Plasticity Analysis of Stresses for Wedge Bit
117(2)
4.3.5.1 Smooth Bit
119(1)
4.3.5.2 Rough Bit
120(1)
4.3.5.3 General Case
120(1)
4.3.5.4 Role of Interfacial Friction
121(1)
4.4 Numerical Analysis of Stresses in Rock Indentation
122(17)
4.4.1 Blunt Bit, Sharp Wedge, and Cylindrical Bit
123(1)
4.4.1.1 Blunt Point Bit
124(1)
4.4.1.2 Sharp Wedge Bit
124(1)
4.4.1.3 Cylindrical Bit
125(1)
4.4.2 Punch Indenter
125(4)
4.4.3 Chisel, Cross, and Spherical Button
129(2)
References
131(8)
Chapter 5 Analytical Models for Rock Indentation
139(32)
5.1 Introduction
139(1)
5.2 Cavity Expansion Model
140(13)
5.2.1 Basic Assumptions
144(1)
5.2.2 Dimensional Analysis and Similarity Consideration
145(1)
5.2.3 Self-Similar Solution for Blunt Wedge and Cone Indentation
146(1)
5.2.4 A General Solution of Rock Indentation
147(1)
5.2.5 Spatial and Material Derivatives
147(1)
5.2.6 Stress Field
148(2)
5.2.7 Velocity Field
150(1)
5.2.8 Velocity Boundary Conditions
151(1)
5.2.9 Size of the Damaged Zone and Indentation Force
152(1)
5.3 General Solution for Blunt Indenter
153(1)
5.4 Analytical Model for Indentation by a Sphere
154(1)
5.5 Analytical Model for Indentation by a Truncated Wedge
155(1)
5.6 Analytical Model for Indentation by a Wedge
156(10)
5.6.1 The Mathematical Models for Chipping
157(1)
5.6.2 Analytical Model of Wedge-Bit Penetration
157(2)
5.6.3 Angle of Fracture
159(1)
5.6.4 Second Chipping
160(5)
5.6.5 The Effect of the Physico-Mechanical Properties of Rocks on Chipping
165(1)
5.7 Analytical Model for Bit Penetration into Rock by Conical Indenter
166(5)
References
168(3)
Chapter 6 Indentation Indices and Their Correlation with Rock Properties
171(20)
6.1 Introduction
171(1)
6.2 Indentation Hardness Index
171(2)
6.2.1 Standardized Indentation Hardness Test
172(1)
6.3 Brittleness Index
173(1)
6.4 Studies on Indentation to Correlate the Indentation Indices with Mechanical Properties of Rocks
174(3)
6.5 Indentation Modulus and Critical Transition Force
177(3)
6.5.1 Methodology
177(3)
6.6 Rolling Indentation Abrasion Test (RIAT)
180(1)
6.7 Concept of Rock Penetration Resistance (RPR) to Predict Penetration Rate in Percussive Drilling
180(11)
References
188(3)
Chapter 7 Specific Energy in Rock Indentation
191(34)
7.1 Introduction
191(1)
7.2 Studies on Specific Energy on Rock Drilling
192(5)
7.3 Studies on Specific Energy on Rock Cutting
197(3)
7.4 Influence of Indexing Angle on Specific Energy
200(5)
7.4.1 Specific Energy in Impact Indentation
201(4)
7.4.2 Comparison of Specific Energy in Static and Impact Indentation
205(1)
7.5 Influence of Rock Properties on Specific Energy in Rock Indentation
205(9)
7.5.1 Residual Plots for Specific Energy
207(4)
7.5.2 Performance Prediction of the Derived Models
211(3)
7.6 Influence of Mineralogical Properties on Specific Energy
214(3)
7.7 Influence of Elements/Minerals in Oxides Form Obtained from X-ray Florescence (XRF) Test on Specific Energy
217(8)
References
219(6)
Chapter 8 Development of Models to Predict Specific Energy
225(16)
8.1 Introduction
225(2)
8.2 Mathematical Models Using Multiple Regression Analysis
227(1)
8.2.1 Multiple Regression Analysis of Chisel Bit
227(1)
8.3 Development of Artificial Neural Network Models to Predict Specific Energy from Properties of Rock
228(4)
8.3.1 Fundamental Concepts in ANN
228(2)
8.3.2 Multilayer Perceptron
230(1)
8.3.3 Back Propagation Algorithm
231(1)
8.4 Development of ANN Model
232(3)
8.5 Performance Prediction of the Regression and ANN Models
235(6)
8.5.1 Analysis of Artificial Neural Network Results
236(2)
References
238(3)
Chapter 9 Numerical Modeling or Kock indentation
241(26)
9.1 Introduction
241(1)
9.2 Studies on Numerical Simulation of Indentation and Cutting in Rock
242(5)
9.2.1 Influence of Microstructure of Rocks
245(1)
9.2.2 Influence of Scale Effect
246(1)
9.3 FEM Analysis of Bit Penetration into Rock
247(20)
9.3.1 Description of the Numerical Model
248(1)
9.3.2 Assumptions in FEM Analysis
248(1)
9.3.3 Defining Element Type
249(1)
9.3.4 Material Properties
250(1)
9.3.5 Mesh Generation
250(1)
9.3.6 Boundary Conditions Adopted
251(6)
9.3.7 Numerical Analysis of Wedge Indentation
257(6)
References
263(4)
Index 267
Ch. S. N. Murthy joined NITK, Surathkal (formerly known as KREC, Surathkal) in August 1987 as a lecturer and presently working as professor in the Department of Mining Engineering. He did B.E. (Mining Engg.) from Kothagudem School of Mines, Osmina University in 1980. He joined in M/s. The Singareni Collieries Co. Ltd. In July 1980 and worked in underground coal mines for 5 year and 6 months. He got M.Tech (Mine Planning & Design) from Indian School of Mines, Dhanbad in 1987. He completed Ph.D in Mining Engineering from I.I.T, Kharagpur in 1999. His areas of interest for research are Rock Drilling, Mine Planning & Design, Underground Coal Mining, Ground Control, Mine Surveying and Rock Excavation Engineering. He actively involved in research activities and completed 4 R&D Projects as PI/CO-investigators and 1 project is in progress. He organised more than 20 training programmes/short term courses/workshops. He organised one National Seminar in 2008 and one International Symposium in 2010 jointly with DGMS. He guided 8 Ph.D. scholar and another 10 Ph.D. scholar are carrying out research work. He published more than 150 technical papers in International Journal/ National Journal/ International Symposium/ National Seminar. He visited USA, Canada, Australia, Malaysia, and Singapore. He is life member of The Institutions of Engineers (India), Mining Geological & Metallurgical Society of India and Mining Engineering Association of India (MEAI).
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