Coupled hydromechanical behavior of jointed rocks in the study of HTPF tests
Hydraulic fracturing had been a widely applied method of measuring stresses in a drilled bore-hole. During the test procedure, induced forces due to the interaction between fluid flow and rock blocks deformation overcome the in-situ least stress. Thus the coupled hydromechanical behavior of rocks having pre-defined joints should be considered. In order to model the process, an interactive computer program was developed. Through a numerical analysis, at first, fluid flow forces were calculated by Extended Pressure (EP) method. Then the coupled influence of fluid on mechanical behavior of rock blocks is included using Dis-continuous Deformation Analysis (DDA). The procedure was used to simulate hydraulic tests on pre-existing fractures (HTPF). Finally having pressure-time records, the inverse calculation of in-situ stresses are compared with conventional method. The results have a reasonable coincidence.
N. Valinezhad H. Ghasemzadeh
Department of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran
国际会议
The Fifth International Symposium on In-situ Rock Stress(第五届国际岩石应力研讨会)
北京
英文
623-630
2010-08-25（万方平台首次上网日期，不代表论文的发表时间）