Dewatering in a collapsible deeply weathered Birimian phyllite for shaft sinking at Ashanti Goldfields Corporation (GH) Limited

C. Asamoah-Owusu, F. T. Suorineni

Research output: Contribution to conferencePaperpeer-review

Abstract

The Ashanti Goldfields Corporation (Ghana) Limited is currently undergoing a major expansion programme. Part of this programme is to sink a 6.41m diameter shaft to a depth of 1,037m through 30.5m of water bearing decamposed Birimian phyllites. This paper discusses the plans for the site investigation, the engineering properties of the decamposed phyllite and field permeability tests to establish the bulk permeability of the ground within the vicinity of the shaft. The dewatering well design and the problems encountered during the wells installation and development are also presented.

Original languageEnglish
Pages1257-1260
Number of pages4
Publication statusPublished - Jan 1 1991
Externally publishedYes
Event7th International Society for Rock Mechanics and Rock Engineering Congress 1991 - Aachen, Germany
Duration: Sep 16 1991Sep 20 1991

Conference

Conference7th International Society for Rock Mechanics and Rock Engineering Congress 1991
CountryGermany
CityAachen
Period9/16/919/20/91

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geology

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