Longwall seafloor subsidence monitoring; Why and how

Journal Article · Fri Dec 01 04:00:00 EST 1989 · Mining Engineering (Littleton, Colorado); (USA)

OSTI ID:7263847

Aston, T R.C. ^[1]

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1. Canadian Explosives Atmosphere Lab., CANMET, Mining Research Labs., Ottawa, Ontario (CA)

Extensive undersea coal reserves, identified in the offshore portion of the Sydney coalfield, Nova Scotia, have resulted in the implementation of a multi-year research program to develop site specific guidelines for the undersea longwall mining operations. At present, uncertainty exists regarding the applicability of the current undersea mining guidelines. Preliminary studies have revealed four potential schemes for monitoring seafloor longwall subsidence profiles: seasurface, subsea, geophysics, and direct monitoring. However, further work has indicated that the use of marine geophysical techniques may be the most effective method of identifying and evaluating seafloor subsidence profiles by comparing pre- and post-mining seafloor topographies.

• OSTI ID: 7263847
• Journal Information: Mining Engineering (Littleton, Colorado); (USA), Journal Name: Mining Engineering (Littleton, Colorado); (USA) Vol. 41:12; ISSN MIENA; ISSN 0026-5187
• Country of Publication: United States
• Language: English

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