NIOSHTIC-2 Publications Search

Tunnel Relaxation Method for Determining the Initial and Long-term Deformation Around an Underground Opening.

Authors
Waddell-GG; Crocker-TJ; Skinner-EH
Source
Proc 12th Symp on Rock Mechanics Rolla Missouri, 1970 Nov; :903-931
Link
NIOSHTIC No.
10010556
Abstract
This paper describes a method of measuring initial and long-term deformations which occur in the medium surrounding mine accessways and discusses the importance of this type of measurement in assessing support-problem areas. Delineated are (1) description of the rock-deformation monitoring equipment, (2) results of two field tests which monitored rock deformation around 4-foot-diameter raise bores, and (3) a numerical-analysis (finite-element) technique to correlate theoretical with experimental results. Instrumentation developed provided the sensitivity and resolution needed to measure rock deformation around a full-scale raise bore during excavation. Results of the tests conducted at the Lucky Friday Mine, Mullan, Idaho, show the relationships between (1) deformation versus time, and (2) deformation versus bit progress.
Publication Date
19701101
Document Type
OP;
Fiscal Year
1971
Identifying No.
OP 72-71
NIOSH Division
SRC;
Source Name
Proc. 12th Symp. on Rock Mechanics, Rolla, Missouri, Nov. 16-18, 1970, PP. 903-931
State
ID; MO;
Page last reviewed: April 12, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division