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Stability of an Underground Room in Frozen Gravel.

Authors
Pettibone-HC; Waddell-GG
Source
Proc 9th Ann Symp Eng Geology and Soils Eng Boise Idaho 4/5- 7/71 10/71 PP 3-30 :3-30
Link
NIOSHTIC No.
10010243
Abstract
Research was conducted by the Bureau of Mines to aid in estimating the economic and technological feasibility of mining gold from frozen gravel placers in Alaska. This presentation describes the progress of one of several projects conducted. As part of this study the Spokane Mining Research Center undertook to determine the conditions under which a 30- by 70-foot underground room would safely remain open without artificial supports. The evaluation was instrumented with closure points, thermocouples, recording thermometers, and hydraulic props.
Publication Date
19710101
Document Type
OP;
Fiscal Year
1971
NTIS Accession No.
NTIS Price
Identifying No.
OP 182-71
NIOSH Division
SRC;
Source Name
Proc. 9th Ann. Symp. Eng. Geology and Soils Eng., Boise, Idaho, 4/5- 7/71, 10/71, PP. 3-30
State
AK; ID;
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