... of rock compressive strength, density, cohesion force and internal friction angle. According to the rock classification standard, drilling data and real rock mass basic quality index (abbreviation BQ), the relationship between the drilling rate and BQ is also established, and the classification table...

... and boulder dislocations due to the long-term rock mass deterioration, distressing, water percolation and weathering in Ajanta caves for a strike length of nearly 600m and a height of nearly 75m are a major concern considering the safety of the visitors/tourists, the site personnel's and also keeping in view...

... the regression analysis is employed, the basic regularity is turned out, which shows the angle of shearing resistance of the rock mass can be determined by the angle of shearing resistance of the rock experimented in laboratory through a discount with the coefficient of its rock integrity. Subject: Site...

... and strength and deformation of fractured rock were discussed from the perspectives of energy dissipation, in considering friction and without considering friction conditions, changing mechanism of strain energy in the fractured rock mass crack surface were revealed. 1 INTRODUCTION There are a large number...

... Abstract The principle of nonlinear equation proposed by E. Hoek is elaborated, then based on that, new algorithm of obtaining shear strength of rock mass is brought forward by considering the overall or average level when rock mass is broken. Through the new algorithm, the magnitudes of shear...

... underground disposal of radioactive waste. The purpose of a radioactive waste repository is to ensure that unacceptable quantities of radionuclides do not migrate to the biosphere through the surrounding rock mass. Accordingly, and in designing the repository, coupled computer modelling is required to take...

... Abstract Taking the carbonaceous phyllite as investigative subject, which is the weak layer widely distributed in Yunfu pyrite, Guangdong province, the deformation characteristics and strength properties of the carbonaceous phyllite rock mass are analyzed through laboratory uniaxial...

... Abstract This paper summarizes the modelling of rock structure at the scale of the in-situ engineering rock mass of interest, based on the synergistic combination of TLS, digital photogrammetry, and precise RTK-GPS surveying. The distinctive features of the approach are: all data...

... slope failures (e.g., Hoek & Bray 1977, Sarma 1979, Goodman 1989, Aydan & Kawamoto 1992), large scale field and laboratory shear testing of rock discontinuities (e.g. Rocha et al. 1955, John 1962) and the use of computerised test data collection (e.g. Barla et al. 2007), development of rock mass...

... Abstract The characteristic of deep rock joints affects the mechanical behavior of rock mass in underground rock engineering, especially underground oil storage caverns. Borehole Television (BHTV) is used to investigate lithology and deep rock joints characteristic, which is dip direction...

..., Fuxin, Liaoning, China Xiaochun Wang North China University of Technology, Beijing, China ABSTRACT: Under the condition of deep mining, anomalously low friction effect in deep block rock mass is related with dynamic disaster in deep rock mass. Based on practical situation of deep mines in China...

... Abstract The present papers deals with in situ characterization of rock formations as per Schmidt Rebound Hammer classification values (R) and portrays a model for spatial susceptibility of landslides in mountainous terrain. A geotechnical classification of rock masses depending on the range...

... Abstract The naturally existing fractures in a rock mass induce heterogeneity and anisotropy for its engineering properties, resulting in difficulties for investigation on hydrogeological characteristics of fractured rock masses. Aiming to gain more insight into the difference of permeability...

... calculation scheidegger method rock mass formula instability surge height renewable energy prediction landslide mass reservoir block unit dynamic change process deformation Upstream Oil & Gas energy method Pan Jiazheng method jiazheng method discrete element method Rock...

... to the ratio of in-situ stress which is about 1. The geological analysis and the numerical simulation show that the special rock mass with layered structure presents an appearance of heterogeneous condition which affects the redistribution of stress in tunnel and takes major responsibility for the large...

... of the Himalayas and close to a high stress thrust zone known as the Main Central Thrust (MCT). This paper evaluates the stability of the powerhouse and discusses measures to strengthen the cavern. Both finite and distinct element analysis are performed to better understand the behavior of the rock mass...

... with the increase of the distance from the explosive center in rock masses. Figure 1 shows the distribu- tion of micro-seismic events behind working face, which were affected by blasting disturbance of the single tunnel without the influence of blasting dis- turbance in the adjacent tunnel. It can be seen that most...

... the properties or input data of geomaterials as random variables rather than constant values because of their uncertainties. In this paper reliability analysis of a circular tunnel in elastic-strain-softening rock mass subjected to a hydrostatic in situ stress field is conducted. Computational procedures...

... Huadong Engineering Corporation, Hangzhou, China ABSTRACT: High buried depth of Jinping II tunnel lead to sharp contradiction between stress and rock mass strength. The damage zone existing in surrounding rock has important impact on both the tunnel stability and supporting design. Fully understand...

... rock) and 4B (in VI class surrounding rock), and B is the tunnel span. Because when the interval of tunnels less than the above value, the rock mass between two tunnels will be destroyed during construction, which cause that surrounding rock become unstable. And some reinforcement measures which...