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Development of a high efficiency ejector system.

Authors
Burnett-M
Source
Washington, DC: U.S. Department of the Interior, Bureau of Mines, AML 03-95, 1991 Oct; :1-31
Link
NIOSHTIC No.
20039421
Abstract
Subsidence resulting from the collapse of abandoned underground mines is a significant problem, especially in areas where surface development has taken place. The most common methods used to abate subsidence are slurry backfilling, remote pneumatic stowing and cement grouting. The most common method of pneumatic stowing is dilute phase transport. The drawbacks to stowing with the dilute phase technique are the limited placement of fill material, the cost of equipment, and abrasion to the system. In an effort to reduce the abrasion of the elbow, the 'Dry Feed Ejector' was developed. The dry feed ejector eliminates the need for costly airlock feeders typically associated with pneumatic stowing.
Keywords
Abandoned-shafts; Air-ejectors; Backfills; Dry-feed-ejectors; Geotechnical-engineering; Grouting; Land-reclamation; Mines-excavations; Mining-engineering; Nozzles; Pneumatic-stowing; Soil-stabilization; Subsidence; Underground-mining; Pneumatic-equipment
Publication Date
19911001
Document Type
Final Contract Report
Fiscal Year
1992
NTIS Accession No.
PB95-190286
NTIS Price
A03
Identifying No.
AML-03-95; Contract-J0309012
NIOSH Division
WO
Source Name
Washington, DC: U.S. Department of the Interior, Bureau of Mines, AML 03-95
State
DC; MA
Performing Organization
Burnett Engineering, Sudbury, MA
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