... Abstract Theoretical calculation methods generally exaggerate the extent of the EDZ and used formulas do not apply to most rock types. This study comprises of correlating the theoretical to the realized extend of the EDZ on drill and blast (D&B) excavation surface. Generally when...

.... Considering the abrasion process of the strata, the second stress value of measuring points is calculated in the entire mesh model. Numerial results of real project indicate that the in-situ stress field obtained by second fine inversion method fits for the distribution law of V-shaped vally generally. 1...

... of the overburden gravitational stress component and the tectonic stress component. Then, the tectonic stress coefficient in the direction of the maximum and minimum principal stress can be calculated on the base of the rock mechanical experiment parameters and fracturing work data. According to the tectonic stress...

.... In the conventional method, gravity alone has been considered to calculate an in situ stress field (Mizuta et al. 1997). However, most existing studies (Mizuta et al 1997, Sulistianto et al 1998) of in situ stress suggest that horizontal stress caused by plate tectonic forces should be considered for quanti- tative...

... ABSTRACT: "Relative Geodynamics" is first introduced briefly, which explains the irresistibility of the earthquake power source based on physical principles. Then, the basic idea for the continuous measurement of stress in mines all over the country is proposed. Lastly, the calculation...

... field s multi-factor regression analysis, based on visual BP neural network and on ActiveX technology, is presented with an application example. The relevant theories of neural network are adopted and permit to calculate the three dimensional stress fields. The method owns the advantages of strong...

... calculation is derived. Reasonable objective function is selected to solve minimum value by applying optimization method to adjust and search design parameters, thus boundary loads are obtained. By use of the inversion boundary loads, finite element forward solution is carried out, so in-situ stress field...

... was used for in-situ stress measurement in most of the 30 projects. hydraulic fracturing situ stress measurement reservoir geomechanics calculation mining design stress state metals & mining Engineering stress measurement result MPa stress measurement province Mining Engineering...

... of the research area and rock mass structure. The established 3D simplified geological model is calculated by Fast Lagrangian Analysis for Continuum of FLAC3D. A multivariate regression model is established between the actually measured and corresponding calculated results of geostresses. According to multiple...