Table 1.

Rock head levels m OD from boreholes.

Elevation of rock head as determined usingSHAFT 1ASHAFT 1
BHs before FailureBH809PT804PT805BHD PT803PT802PT801BHABHBBHE
−12.23−13.99<−7.12−11.34−14.47−14.24−13.89−12.06−12.62−12.64
BHs after FailureS1S1AS2S3S4S5S6S3/1S3/2  
−12.69−11.47−12.54−18.55−12.03−12.96−12.09−15.92−17.11
(drift in fault)