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1、 1,Describe the structure of rock in the formation 2,The definition of some stress or foce and give the example respectively Body force Surface force Internal force Outside force Stress Srain 3,Pls describe the Int-Satu stress state of rock in the formaton Overburden Maximum horizontal principal str
2、ess Minimum horizontal principal stress Pore pressure 4.Give the stress matrix of complex stress state,and point out which two are equal 5.Pls determine the normal stress and shear stress 1=120Mpa 1=40Mpa 2=40Mpa 2=120Mpa =30 =60 6,Explain the meaning of following point,and calculated elastic modulu
3、s C B D A B yield stress C compressive strength D residual strength 7,Calculate of poisson s ratio 50 cm 25cm 25cm 30cm r=d/d=(30-25)/25=0.2 a=l/l=(25-50)/50=-0.5 =r /a=0.4 8.Pls give mohr circle when Pp increase 10 Mpa and decrease 10 Mpa.空隙压力加 10Mpa 10 20 70 80 空隙减少 10Mpa 20 30 80 90 9.Pls give the definition of 0,0 为岩石固有剪切强度，与粘聚力相当 为内摩擦角 f=tan,f 为内摩擦系数 10.Pls give the definition of Pc(坍塌压力),Pf（破裂压力）