2. Experimentalequipmentandmethods
2.1.Experimentalequipment
The test was conducted using a high-temperature triaxial
loading testsystem(Fig. 1). The testing apparatus is used to apply
triaxial compression on the salt rock sample under high tempera-
ture using a computer to control the electro-hydraulic servo
automatic loading system.The hydraulic station provides the
power,the computer measurement and control system are used
to control the electric-hydraulic servo valve,and the host runs the
experiment under the control of the computer.Themaximum
axial force used was 400 kN,the highest confining pressure
applied was 30 MPa,and the highest temperature was 100 1C.
2.2. Experimental method
The salt rock samples in this experiment were collected from
depths of 1000 mat sites in the Himalayas.The rock has a high
content of NaCl(morethan96%),small amounts of K2SO3, and
some mud.To ensure the similarity of the salt rock samples as
much a possible,samples with almost the same content of
impurity and with out cracks were selected.The salt rock samples
were cut in to circular cylinders 50 mm diameter 100 mm length,
and the evenness of the head faces was controlled to 0.02 mm.
Appropriate measures were taken to protect the salt rock speci-
mens from fatigue damage during processing.We assume that all
the samples were subjected to similar processing damage;there-
fore, the effect on the test results would be minimal
2. Experimentalequipmentandmethods2.1.ExperimentalequipmentThe test was conducted using a high-temperature triaxialloading testsystem(Fig. 1). The testing apparatus is used to applytriaxial compression on the salt rock sample under high tempera-ture using a computer to control the electro-hydraulic servoautomatic loading system.The hydraulic station provides thepower,the computer measurement and control system are usedto control the electric-hydraulic servo valve,and the host runs theexperiment under the control of the computer.Themaximumaxial force used was 400 kN,the highest confining pressureapplied was 30 MPa,and the highest temperature was 100 1C.2.2. Experimental methodThe salt rock samples in this experiment were collected fromdepths of 1000 mat sites in the Himalayas.The rock has a highcontent of NaCl(morethan96%),small amounts of K2SO3, andsome mud.To ensure the similarity of the salt rock samples asmuch a possible,samples with almost the same content ofimpurity and with out cracks were selected.The salt rock sampleswere cut in to circular cylinders 50 mm diameter 100 mm length,and the evenness of the head faces was controlled to 0.02 mm.Appropriate measures were taken to protect the salt rock speci-mens from fatigue damage during processing.We assume that allthe samples were subjected to similar processing damage;there-fore, the effect on the test results would be minimal
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