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Characterization of rock masses is one of the fundamental aspects of rock engineering. Particularly, as a rock mass characteristic, determination of the strength of jointed rock masses is difficult since the size of representative specimens including discontinuities is too large for laboratory testing. This problem can be overcome by using the Hoek– Brown empirical failure criterion in conjunction with the Geological Strength Index (GSI) classification system. However, characterization of rock masses and determi...

In this paper, the relationship between p-wave velocity and the most important strength properties of rock material has been studied. During this research eight various types of rocks from north-west of Iran have been tested view pointed of uniaxial compression strength (UCS), tensile strength (Brazilian test) and elastic modulus. Regression analyses between above parameters and p-wave velocity reveals that there is a mathematical relationship with exponential equation (R2= 0.8597) between p-wave velocity and unia...

This work focuses on the assessment of seismic risk issues associated with the potassium salt deposit of Provadia and Soligorsk. The long-term studies 1983-2007 of the only terrestrial Bulgarian salt deposit (Provadia - 43.060N, 27.450E) and Belarusian (Starobin - 52.840N, 27.470E) in connection with the observed higher seismic activity and probable manifestations of technogenic seismicity in the region is presented. The characteristic features of the seismic processes as the identity of the curves of recurrence o...

This paper is devoted to geological and geophysical exploration of Sarband graphite deposits in Markazi province of Iran includes Khanadarreh Bala and Vesmestan deposits. Geological methods include trenching and drilling test pits and exploratory holes, sampling and analyzing with XRD and chemical analysis. This method show that Khanadarreh Bala deposits has purer graphite than Vesmestan and hosted in schistisited rocks and has higher continuity than Vesmestan deposit. Geophysical methods include SP ,mise-a-la-mas...

This paper deals with a variety of projects and parameters that we had to deal with as we participated – contributed to the 2004 Olympic Games infrastructures providing blast consulting services. The most in number and also most characteristic examples of specific management, that we were required to deal with and implement, were in the wider area of Athens (Attica), which is the main City of the Olympics. Many of the projects had to be accomplished through blasting, though there were archaeological finds and st...

A method for landslide investigation, based on the deformations-theory and on the finite elements method, is proposed. The practical application of the method for a real object – the landslide near Orsoja is shown. The main priorities of the deformation analysis in comparison with the mass applicated in the practice moving observation are shown.

This study investigates the potential environmental impact of ground vibrations produced from blasting operations performed at AraklД±-TaЕџ\"on\"u limestone quarry where the school, mosque, historic place and village houses are situated. During the study, the parameters of scaled distance were recorded carefully, and the groundvibration components were measured at different locations by suitable monitors for 31 blast events. From the statistical analysis of the results, the general peak particle velocity equation ...

This paper is devoted to a seismotectonic study and earthquake hazard assessment for the Hamadan area. The major faults, active faults and potential seismic sources as well as the moderate and large earthquakes in the region are identified and illustrated in a seismotectonic map. The appropriate attenuation laws are selected according to seismotectonic characteristics of the region and site geology of the area. A model of the earthquake sources are prepared and earthquake hazard analysis has been done for the area...

This paper presents the estimation of ground vibration parameters induced by blasting excavations realized at eight different sites located close to the residential areas. Within the scope of this study, in order to predict peak particle velocity and determine the slope of the attenuation curve for eight sites, ground vibration components were measured for all blast events over a long period. During the study, while the parameters of scaled distance were recorded carefully, the ground vibration components were mea...

Recently, numerous landslides occurred in the southern part of the \"Ozen Dam (Sivas-Turkey) threatening the spillway. Kinematical analyses showed that the potential slope instability direction is NW corresponding to the dominant slope directions. Geotechnical surveys confirmed the rock slopes are highly prone to instability, and failures occurred in the limits between basement rock and debris material in the alteration zone as a planar surface. Pre-existing failures, excavations in the toe of the slopes, low qual...

Many production open-spaces and slopes is occurred during or after both production and overburden stripping in coal open pit mines. Under these different conditions sometimes slope stability problems in pit embakments may occur resulting loss of money. In this article the design principles and range of instability of such embakments are introduced. The purpose of this study is to exhibit the methods of field rehabilitation and measures taking in to consideration against possible slope instability.