Prediction of long-term creep closure in salt

Nelson, Jim; Kelsall, P.C.

doi:10.1016/0148-9062(86)91039-9

International Journal of Rock Mechanics and Mining Sciences &am

1986

DOI: 10.1016/0148-9062(86)91039-9

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Prediction of long-term creep closure in salt

Jim Nelson¹,

P.C. Kelsall

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1997

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An assessment of borehole sealing performance in a salt environment

Akgün

1997

Environmental Geology

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Design of plugs for abandonment of boreholes and shafts may be governed by the bond strength between the plug and host rock. This paper presents the results of push-out tests on cement grout plugs in salt. Two types of expandable cement grouts have been tested. The average interface shear strengths ranged from 2 to 12 MPa (290 to 1740 psi). Peak shear stresses at failure, assuming an elastic stress distribution along the interface, were up to eight times higher. Standard deviations commonly reached 20%. Dissolution along the interface was observed, and may have been enhanced by clay inclusions in the salt. This dissolution appears to have reduced bond strengths. Application of the results to the design of plugs for larger openings (for example, shafts, drifts, or boreholes) is discussed.

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An assessment of borehole sealing performance in a salt environment

Akgün

1997

Environmental Geology

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Prediction of long-term creep closure in salt

Cited by 1 publication

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An assessment of borehole sealing performance in a salt environment

An assessment of borehole sealing performance in a salt environment

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