Deep-Hole Drilling with Explosives

1. A Survey of Some Processes of Shattering Rocks.- A. Shattering Rocks by Impulses of High Pressure.- Impulse Jets of Liquid.- Impulses of Pressure in Liquid by Collapse of Vacuum Cavities.- Ultrasonics.- Electrical Discharge in Liquids.- Explosions.- B. Themnial Processes of Shattering Rocks.- Gas Jets.- Plasma.- Corrosion of Electrodes.- Design of a Plasma Generator.- High-Frequency Currents.- 2. Model Investigations on Forming Holes by Explosions.- Method of Investigation.- Rock Properties and the Effectiveness of Explosions.- Strength Characteristics of Rocks during Explosive Discharges.- The Method of Determining Critical Tensile Strength (?tens cr)for Solid Media during Explosive Discharges.- The Influence of the Surrounding Fluid Medium on the Breaking of Plexiglas during Explosive Discharges.- Outline for Forming Holes by Explosions.- The Principal Parameters of an Underwater Explosion and Its Zone of Influence.- The Effect of Hydrostatic and Rock Pressure on the Shattering of Rocks by Explosions.- 3. The Formation of Holes by Explosions in Rocks in Their Natural Mode of Occurrence..- Drilling Shallow Holes.- Changes in Properties of Rock with Depth.- The Sinking of Deep Holes.- Chapter4. The Work of Explosive Charges during Underwater Explosions.- Hydrostatic Pressure and the Operation of the Explosive Charge.- The Influence of the Initiator on the Local Effect of an Explosion.- Influence of the Medium Surrounding the Charge and the Solid Face on the Action of the Explosion.- Chapters 5. The Transmission of Detonations between Explosive Charges.- The Transmission of Detonations in Air.- The Transmission of Detonations in a Practically Unlimited Liquid Medium.- Transmission of Detonations in Pipes Filled with Water.- Transmission of Detonations during Explosive Drilling.- The Mechanism of Igniting and Transmitting Detonations between Explosive Charges during Underwater Explosions.- Chapters 6. Removal of Large Rock Fragments from the Hole.- Model Conditions.- Experimental Investigations.- 7. The Technique of Drilling Holes by Explosions.- Principal Features.- The Explosive Capsule.- The Equipping-Feeding Apparatus.- The Instrument.- Method and Apparatus of Control.- Chapters 8. The Technology of Drilling Bore Holes by Explosions.- The Procedure of Drilling by Explosions.- Removing Crushed Rock from the Hole.- The Scattering of Explosive Charges over the Bottom of the Hole.- Peculiarities of the Explosive Method of Drilling Holes.- 9. Results and Potentials of Explosive Drilling.- Principal Results.- The Effect of Hole Depth on Effectiveness of Drilling.- The Effect of Rock Properties on Effectiveness of Drilling.- Analysis of Over-all Penetration Rate.- Potentials of the Explosive Method of Drilling Deep Holes.- Literature Cited.