Rapid excavation: significance, needs, opportunities. (1968) / Chapter Skim
Currently Skimming:
Research Program
Research Program
Pages 38-42
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 38... ...
and at a reasonable total cost (approximately $200 million, in constant 1964 dollars) through implementation of a supplemental research program, i.e., a research program over and above current governmental and private research efforts.
|
From page 39... ...
Although i t is beyond the s&ope o f this report to identify specific research projects or precise fields of research to be pursued, it is recommended that research projects be selected for inclusion in the program on the basis o f their potential contribution to the coordination of the several elements o f the imderground-excavation' process into a highly engineered system and to the improvement of the basic knowledge required to subsequently effect engineering advancements in the following critical areas, given in approximate order of priority: 1. Development o f processes and equipment for boring tunnels and shafts in hard abrasive rock and for reducing the downtime experienced with current mining and tuimeling machines in soft or medium rock masses 2.
|
From page 40... ...
m CM X S .J M « X ii (4 9 X s s ^^ .1 B I «N if I I 00 .1 ll .5 40
|
From page 41... ...
Although the potential advantages of these techniques include the possibility of greater destructive energy at the working face and the creating of shapes other than circular, the formidable obstacles faced in the application of these techniques include excessive power needs, environmental contamination, and extreme variation of response of many different rock types. In light of the foregoing, it is recommended that research resource allocations in support of new rock-disintegration techniques be made in accordance with the priorities listed in Table 9.
|
From page 42... ...
Drill and blast Drill design and materials 1 L Drill and blast Automation of drilling 2 H Drill and blast Drilling pattern 2 H Drill and blast Explosives studies 1 L Drill and blast Controlled cavity shape 2 M Drill and blast Loading automation 2 H Drill and blast Gas-exhaust improvement 2 M Rolling cutter Weak-rock cutter 1 L Rolling cutter Medium-rock cutter 1 L Rolling cutter Hard-rock cutter 2 H Rolling cutter New energy modes 3 H Rolling cutter New conflguratmn of cutter head 2 H Rolling cutter New cutter materials 1 H Mechanical Fluid erosion 2 HC Mechanical Spark 2 Mechanical Ultrasonic 2 M Mechanical Abrasion 2 L Mechanical Exptosive 2 M Mechanical Implosive 3 - L Mechanical PeUet 1 L Thermal High-velocity flame 2 hp Thermal Cryogenic 3 L Thermal Jet piercing 1 L Thermal Electron disintegration 2 L Thermal High-frequency electric 3 L Thermal Induction 3 L Chemical Softeners 2 M Chemical Dissolvers 0eaching) 2 M Fusion Plasma 2 HC Fusion Laser 3 M Fusion Atomic 3 L Fusion Fusion 2 L Fusion' Electric arc 2 L Fusion Electron beam 3 L «1 = high, 2 = medium.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.