.... metals & mining cavern knowledge management proceedings reservoir characterization symposium engineering nonlinear finite element analysis geohazard risk upstream oil & gas underground salt cavern subsidence natural gas storage tuzla bosnia and herzegovina case study equation...

... and to link the results of each data set, the hyperbolic method (Tan et al., 1991) is adopted. Subsidence St is assumed to be represented by equation (1), in which and are constants to be determined from the measured subsidence. When time t goes to infinity in equation 1, St becomes 1 which is denoted...

... natural gas storage underground mined-out area cubic parametric spline curve mined-out area Reservoir Characterization frequency Upstream Oil & Gas equation horizontal section detection detection range cavity vector transducer coordinate system ideal state metals & mining...

... applications under various stress measurement conditions. Considering the shortcomings of HTPF method, a rock mechanics equation to describe the shearing stresses intrinsically present on geological discontinuity planes is established, and at the same time, the least square fitting method and the trial...

... initiation, expansion, compaction, expansion again and compaction again. Equations on voids and permeability in overlying caved rock, residual expansion coefficient, gob depth and the strata movement were established when composite gob becomes basically stable, which can be used to analysis the expanding...

... formula. The LS-DYNA module of ANSYS software which provides explosive material model and JWL equation can simulate the blasting loads. The corresponding impact of blasting loads on the stability of chamber was assessed from the peak vibration velocity and stress by using Lagrange method and matched post...

... Rock loading surface roughness Kelvin model equation TransitDevelopmentinRockM hanics Cai,Yang Wang(Ede) 2015aylor FrancisG up London ISBN978·1-138·02730-5Ac eepst tutivem d lfracturedrocksunderconsiderationofth u f er ughness Tang J A Wa g Y X Wang&QCapK yLab rat yEdu ationi i ryf Saf tya...

... instability anisotropic coal seam Wellbore Design strength coal seam horizontal well Upstream Oil & Gas pore pressure mechanical property wellbore integrity Chen borehole stability build section plane Poisson equation mechanics anisotropy tensile strength TransitDevelopmentinRockMe...

... equation Reservoir Characterization one-dimensional creep equation dry sample creep creep curve creep stage creep property deformation stress level TransitDevelopmentinRockMe hanics Cai,Yang&Wang(Eds)@2015aylor FrancisG oup L ndo ISBN978-7-138-02730-5St dyoc e ppro rtieandconstitutivem d lfca...

... ABSTRACT: This paper presents two dimensional close-form solutions for acoustic emission source location using Time Difference Of Arrival (TDOA) measurements from N receivers, for known velocity system (N ≥ 4) and unknown velocity system (N ≥ 5). We simplify the nonlinear location equations...

... Temperature area (w.) (rp.) 5 THERMODYNAMIC THEORIES OF r·q [mm~ RELATIONSHIP BETWEEN UNFROZEN Upper 20 42.20 0.89 2.23 WATER AND TEMPERATURE slice -2 10.80 0.23 0.57 -5 3.37 0.071 0.18 5.1 Theoretical equation between unfrozen water, -10 0.00 0.00 0.00 ice and temperature -20 0.00 0.00 0.00 Free energy...

... analytical expressions, and use the multi-field coupling program Comsol Multiphys- ics to simulate. The study provides a good reference to the temperature and stress field evolution analy- sis in fractured rock mass under low temperature. 2 SIMPLIFIED MODEL AND CONTROL EQUATIONS 2.1 The basic assumption...

... along the spindle direction. The equations are established in which the source position, propagation speed and spindle orientation are variables. Finally, the equations were solved through genetic algorithm. The comparison between the predict results by our method and the experimental data measured...

... into the role of relevant parameters in the problems, as well as a numerical solution of the reference value (Cai 2001 ). The traditional equation for analysis of stress and strain is based on the assumption of continu- ous and homogeneous. The underground engineer- ing is usually simplified as the plane strain...

... metals & mining coalbed methane Reservoir Characterization flow in porous media Upstream Oil & Gas coal bed methane coal seam gas Modeling & Simulation complex reservoir plastic damage application gas pressure constitutive equation elasto plastic damage constitutive...

... as the basis of evaluation of Debris flow triggered by landslides. In this paper, the depth integral was applied in two-dimensional mathematical model of Debris flow which is based on the principle of conservation of mass and viscous Newtonian fluid N avier-Stovkes equation. Then, this equa- tion...

... of explosive explosion under the action of heat. According to actual condition, breaking point is used to represent the thermal sensitivity of explosive. 2.1.1 Reaction equations of emulsion explosive Emulsion explosive that the mine use is home- made, 1 kg the material of explosive is ammonium nitrate (9.5...

... consolidation equations. Then the incremental frame of governing partial differential equations is established to be suitable for this problem. Third, a physical equation for pore water pressure and the fundamental solutions are presented for the plane strain problem. By use of the fundamental solutions, a semi...

... hl T sd r q ig trsiteinves igationw b3 4RESULTS0FNUMER CSI Oguh fcF g r4f fc s mW v tyfwf o rp nroo Table 2. Parameter of JWL equations. 1180 3300 A (Gpa) 1.4958 B (Gpa) 7.9999 In accordance with the characters of through strata blasting, the roof and floor plane's normal displacement are confined...

... complicated geotechnical problems. It has been applied to a broad range of projects and scientific research. However, the current standard FLAC3D cannot be used reasonably to analyze unsaturated soil problems due to absence of some constitu- tive equations. To overcome above limitation, a hydro-mechanical...