2.6.6.2 Button Bits.

SpringerLink Springer Engineering eBooks 2017 English+International

Foreword I; Foreword II; Preface; Acknowledgments; Contents; Basics; 1 Geology; 1.1 Categories of Rock; 1.1.1 Igneous Rocks; 1.1.2 Sedimentary Rocks; 1.1.3 Metamorphic Rocks; 1.2 Properties of Rock; 1.3 Geological Structures of Rock Mass; 1.3.1 Folds; 1.3.2 Faults; 1.3.3 Discontinuities: Bedding Planes, Joints, and Fractures; 1.3.4 The Compound Structures-Unconformities; 1.3.5 Geometric Representation of Structural Elements; 1.3.5.1 Definition of Geological Terms; 1.3.5.2 Field Survey of a Geological Plane; 1.3.5.3 Stereographic Projection.

1.4 Properties of Rock Mass and Their Effects to Rock Excavation1.4.1 Characterization of Discontinuities in a Rock Mass; 1.4.2 Field Investigations on Rock Mass Properties; 1.4.3 Groundwater; 1.4.4 The Effects of Rock Mass Properties to the Excavation; 1.4.4.1 Rock Strength and Joint Distribution to Blasting Fragmentation; 1.4.4.2 Open Joints Cause Explosive Gas Venting; 1.4.4.3 Wedge Failure on the Free Face Cause Flyrock; 1.4.4.4 Fracture Zone in Rock Mass May Cause Bench Top Flyrock; 1.4.4.5 Slope Failure by Discontinuities.

1.4.4.6 Rock Failure During Tunnel Excavation Caused by Discontinuities1.4.4.7 Groundwater Affects Underground Excavation; 1.5 Classification of Rock Sturdiness; 1.5.1 Protodyakonov's Rock Classification; 1.5.2 "Three in One" Comprehensive Classification of Rock Mass; 1.5.3 China's "Standard for Engineering Classification of Rock Masses" GB50218-2014; 1.5.3.1 Factors of Classification for Basic Quality of Rock Masses; 1.5.3.2 The Qualitative Division of the Hardness Degrees of Rock; 1.5.3.3 The Qualitative Division of the Intactness Degree of Rock Masses.

1.5.3.4 The Quantitative Indexes Determination and Division for Rock Masses1.5.3.5 Classification of the Basic Quality of Rock Masses; References; 2 Rock Drilling; 2.1 Mechanism of Rock Breakage by Drilling and Drillability of Rock; 2.1.1 Mechanism of Rock Breakage During Drilling; 2.1.2 Drillability of Rock and Its Classification; 2.1.2.1 NTNU/SINTEF Method and Classification of Rock Drillability; 2.1.2.2 Rock Drillability Classification Using the Method of Impact Penetrate; 2.2 Classification of Drilling Machines; 2.2.1 Classification on Drilling Manner.

2.3 Classification on Drilling Methods2.4 Rotary-Percussive Drilling; 2.4.1 Top Hammer Drilling; 2.4.1.1 Pneumatic Rock Drills; 2.4.1.2 Hydraulic Rock Drill; 2.4.1.3 Hydraulic Drilling Rigs; 2.4.2 Down-the-Hole (DTH) Drilling; 2.5 Rotary Drilling; 2.5.1 Rotary Drilling with Rolling Tricone Bits; 2.5.2 Rotary Drilling with Drag Bits; 2.6 Rotary-Percussive Drilling Accessories; 2.6.1 Integral Drill Steels; 2.6.2 Type of Threads; 2.6.3 Shank Adapters; 2.6.4 Drill Rods; 2.6.4.1 Drifter Rods; 2.6.4.2 Extension Rods; 2.6.4.3 Drill Tubes; 2.6.5 Couplings; 2.6.6 Drill Bits; 2.6.6.1 Insert Bits.