The Variation of the Angle of Internal Friction with Size Consist for Mechanically-Chipped Material - Year Two

reportActive / Technical Report | Accession Number: AD0755212 | Open PDF

Abstract:

In order to improve aspects of materials handling in the rapid excavation process, research is underway to characterize the muck from mechanical tunnel boring machines. The specific project involves the correlation of the angle of internal friction, to the size consist, often termed gradation, of this mechanically-chipped material. Existing references demonstrate that this angle depends upon mineral type, and for a given mineral type upon size of particles. Particle shape is usually a function of mineralogical character and is not as important a parameter in influencing this angle.

Author(s):
Raab, Donald E. ; Saperstein, Lee W.
Author Organization(s):
PENNSYLVANIA STATE UNIV STATE COLLEGE COLL OF EARTH AND MINERAL SCIENCES
Descriptive Note:
Semi-annual technical rept. 1 May 1972-30 Apr 1973
Supplementary Note:
DOI: 10.21236/AD0755212
Pagination:
0059

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
H0220058-1
Contract/Grant Number(s):
H0220058, ARPA ORDER-1579
Monitor Series:
DARPA
 Subject Terms
Joint Capability Areas:
JCA_5.3_Planning; JCA_5_Command and Control; JCA_1_Force Support; JCA_1.2_Force Preparation; JCA_1.2.3_Educating; JCA_6_Net Centric; JCA_1.2.5_Lessons Learned; JCA_6.2.1_Information Sharing; JCA_6.2.2_Computing Services; JCA_6.4.1_Secure Information Exchange; JCA_3.2_Engagement; JCA_3_Force Application
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*ROCK, *UNDERGROUND STRUCTURES, COLLECTING METHODS, CONSTRUCTION, CORRELATION TECHNIQUES, INTERNAL FRICTION, INVENTORY CONTROL, PARTICLE SIZE, SAMPLING, TEST METHODS
Field(s)/Group(s):
Geology, Geochemistry and Mineralogy, Civil Engineering
Keyword(s):
materials handling, *muck removal, *rapid excavation, rock mechanics, triaxial tests, tunnel boring, *tunneling machines
Report Date:
1972 Dec 01