Accession Number:

ADA001866

Title:

Experimental Investigations of Cable-Tool Drilling of Engineering and Geological Holes with a Circular Face Using a 'Pecking' Method,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1974-11-15

Pagination or Media Count:

18.0

Abstract:

In the article the experimental investigations of the pecking method of drilling are described. The process of drilling by this method entails free release on the cable of the drill from the winch of the drilling machine. Falling under dead weight, the drill gains speed and at the moment of contact with the soil has its fixed value and, consequently, the fixed value of kinetic energy also. Because of this energy the instrument is inserted into the soil a certain amount, which depends on a whole series of factors. Thus, the study of the process of cable-tool drilling by the pecking method is divided into two parts the first concerns the nature of the motion of the instrument along the shaft of the hole, the second - the motion of the instrument in the soil.

Subject Categories:

  • Mining Engineering
  • Civil Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE