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A New Method of Rock Stress Management With Hydraulic Borehole Pressure Cells.

Authors
Lu-PH
Source
Proc Int'l Symp on Rock Stress & Rock Stress Meas Sweden Spet 1986 :237-245
Link
NIOSHTIC No.
10005290
Abstract
This paper presents basic principles and required instrumentation for rock stress measurements with Bureau of Mines hydraulic borehole pressure cells. Existing stresses and stress changes can be measured with the same instrumentation. Based on the elastic theories of plates and thick-walled cylinders, the magnitude of biaxial rock stresses existing in a rock mass can be determined by pressure convergence-divergence tests using a combination of one cylindrical and two encapsulated flat hydraulic borehole pressure cells installed in a single drill hole. Case studies are included to demonstrate the validity of the technique.
Publication Date
19860101
Document Type
OP;
Fiscal Year
1986
NTIS Accession No.
NTIS Price
Identifying No.
OP 133-86
NIOSH Division
DRC;
Source Name
Proc. Int'l Symp. on Rock Stress & Rock Stress Meas., Sweden, Spet. 1986, PP. 237-245
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