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Laboratory Experiments to Determine the Roof Behavior of Auger Mining With Aerostatic Support.

Authors
Singh-MM; Ma-MS
Source
MISSING :51 pages
Link
NIOSHTIC No.
10002719
Abstract
The Bureau of Mines recently devised a method of mining that involves auger mining underground using aerostatic supports; that is, pressurized bladders inserted in the auger holes. Apart from other advantages that the method has to offer for underground productivity and safety, it permits controlled subsidence at the surface. Thus, large differential movements of the surface, which induce damage in structures, are prevented. This report describes model experiments in the laboratory that were conducted to obtain preliminary data for the design of field investigations. The results demonstrated the feasibility of the method and indicated that support pressures of 10 to 18 psi would be adequate for depths up to 1,000 ft and 70 pct recovery. The abutment loads do not exceed those generally encountered in longwall mining.
Publication Date
19820101
Document Type
CP; Final Contract Report;
Fiscal Year
1982
NTIS Accession No.
NTIS Price
Identifying No.
OFR 14-83
NIOSH Division
TCRC;
Source Name
MISSING
Performing Organization
Engineers International, Inc
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