... formations in Xinjiang. The gravel diameter correction coefficient η and the LOT correction factor φ were introduced. So, the improved fracture gradient prediction method can correct the influence of gravel diameter on the fracture pressure and the difference between the fracture gradient obtained by the LOT...

... shale gas engineering earthquake coefficient reservoir characterization upstream oil & gas mineral composition stability property hydraulic fracturing sichuan basin composition seismicity solid earth complex reservoir frictional strength gouge southwest china experiment...

... as a reference vector, the relationship between the tertiary indicator and the optimal index is calculated as follows. max max max max min max max ik ik ik ik ij ik ik ik ik d d d d d d d d 8 Where ij is the correlation coefficient between the actual value of the tertiary coupling...

... plastic cylindrical packaging. The geometric similarity ratio of modell and 2 were 1:400. The experiment results showed that the model strata settlement deformation and the wavelength shift of sensors caused by deformation have linear-relation, the correlation coefficient reached to 0.9. The average...

... 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...

... in large mining height fully-mechanized face and put forward the concept of "pressure vessel" (Hao & Wu 2004). Reservoir Characterization lead abutment pressure Simulation coefficient abutment pressure reservoir geomechanics weighting interval dynamic load coefficient pressure behavior...

... compressive strength and softening coefficient is much lower than ordinary limestone, a feature consistent to the loose, porous physical property of reef calcareous rock. Due to its granular structure, the clastic par- ticles are connected mainly through contact point calcareous cement, forming loose porous...

... model constitutive model calculation gas seepage-stress-damage coupling model equation Fluid Dynamics coefficient rock mass permeability TransitDevelopmentinRockMethanes Cai,Yang Wang(Eds)@2015aylor FrancisG up L ndo ISBN978-7-138-02730 5St dyog ss e age·-stress--damagec li gm lim...

... .Ja2N i12N) +Vplaxz + oi -ghcos&ytan: (10) In equation, h is the depth of debris, M = Uh and N = Vh is flow rate along x,y, U and Vis aver- age velocity along x, y, His sum of ground eleva- tion and debris depth, ex. (J is inclination angle of debris at topography point a is speed correcting coefficient...

... average value can be express as F = f: FS(F)dF = J; F(O'}S1(u)du (5) By the (Eq. 4} and (Eq. 5), fuzzy strength of pillar can be express as - 0 * ~ [ 1 B DE ]o.s uf "'C; + 11(1- v) ln(MV) e (6) where, C; is cohesion; M is crack density; V is pillar volume (m3); B0 is coefficient related to fracture...

... calculation safety factor slope stability Standard Deviation average value slope unit failure probability slope instability probability slope unit reliability index safety coefficient coefficient failure probability probability TransitDevelopmentin 0c Mechanics Cai,Yang&Wang(Eds)@2015aylor Fran...

... coefficient of permeability, respectively. The test results of SWCC in laboratory are always scatter points, which should be best-fitted to obtain basic parameters. The program is written and implemented in Matlab R2010a as follows. I. Create a M-file, and input Equation I. function F = fun(x, xdata) F = x(l...

... interval coefficients. Known by calculation, the value of~ is equal to three with different internal length. It can be con- sidered that the best internal coefficients are three when two bar charges which are the same length blast at the same time. When the resistance line length is less than W...

...-plastic cellular automaton experiment MPa experimental data heater coefficient matrix Simulation THM process boundary opalinus clay production control structural geology pore pressure evolution epca 30 cellular automaton evolution bedding plane TransitDevelopment RockMechanics Cai...