Analysis on the effect of water and confining pressure on mechanical properties of fractured granite

作者：Guo Qifeng; Xi Xun; Zhang Zhaocai; Yan Zhenxiong

来源：Electronic Journal of Geotechnical Engineering, 2014, 19(Y): 8515-8524.

• Confining pressures
• Deformation parameter
• Internal frictional angles
• Mechanical testing systems
• Sanshandao gold mine
• Sensitivity effect
• Triaxial compression
• Water-saturated state

In order to study the mechanical properties of fractured granite in Sanshandao gold mine in condition of high stress and rich water, uniaxial and triaxial compression experiments are carried out to investigate fractured granite specimens in natural and water-saturated state with TAW-2000 type triaxial rock mechanical testing system. Based on the experimental results, the mechanical properties and rock burst potential of natural and water-saturated specimens are compared. The effect of water and confining pressure on the strength and deformation parameters of rock, including peak strength, elastic modulus, Poisson' ratio, cohesion and internal frictional angle are mainly analyzed. The results are as follows: water-saturated state can reduce the value of peak strength, elastic modulus and cohesion and increase the value of Poisson's ratio, but has no influence on the internal frictional angle; no matter in natural or water-saturated state, with increase of the confining pressure, the value of Poisson's ration keeps stable, the value of peak strength and elastic modulus increase gradually, but the sensitivity of peak strength and elastic modulus to confining pressure in water- saturated state is greater than that in the natural state.

• 出版日期2014
• 单位北京科技大学