Showing papers in "Engineering Geology in 1984"

TL;DR: In this paper, the evolution of the texture in two granites and two limestones subjected to slow and uniform temperature change was studied and it was shown that intercrystalline boundaries in granites widen out progressively and porosity increases.

TL;DR: In this article, a diggability index is proposed which consideres both ground conditions and excavating equipment capabilities, based on back-analysis of several mine excavating case studies.

TL;DR: In this paper, an assessment of the suitability of six variants of widely used intensity scales is made by assigning intensities independently on each scale, for the complete data set, for a complete dataset.

TL;DR: In this article, a combination of the Miura index and an index believed to show not only the state of weathering but also the susceptibility to further weathering was used to obtain estimates of the activation energy for the incongruent aqueous dissolution of minerals, which compare favourably with experimental determinations.

TL;DR: The effects of the Catalan earthquake of February 2, 1428, between 8 h and 9 h local time, have been studied by reevaluating the information gathered by Fontsere and Iglesies (1971) as mentioned in this paper.

TL;DR: In this paper, the seismicity of Finland has been re-evaluated on the basis of a new regional magnitude scale, which gives somewhat lower magnitude values than the previously used macroseismic scale.

TL;DR: In this paper, the MSK macroseismic scale describing individual intensity grades determines vulnerability functions for three main categories of structures and the resulting curves are compared with the few existing examples of vulnerability curves derived for specific categories of buildings in the Caucasus and in California.

TL;DR: In this paper, the authors review the highlights of technological developments in room and pillar thick seam mining, single pass longwall, multislice long wall, underwinning and hydraulic mining methods in order to help identify the more promising thick seam methods for the near-term future.

TL;DR: In this article, the authors describe the actions and interactions of geological factors, mining factors and intermediary events during coal and gas outbursts in coal mines and coal seam gas filling coal seams.

TL;DR: In this paper, the mechanical and geotechnical properties of bulk samples and samples extracted from boreholes through a sliding spoil heap at a southwestern Pennsylvania coal mine were examined, and it was found that the material type was more important than the age of spoil in degradation.

TL;DR: In this paper, a comparative analysis is performed between the map displaying the damage distribution produced by the March 4, 1977 earthquake and the map reflecting the seismic intensities of the November 10, 1940 earthquake, pointing out some common features of the two seismic phenomena.

TL;DR: In this article, a standard shape defined by means of a study of near-field response spectra, scaled to an intensity/velocity correlation, is proposed for site-specific hazard assessment, entailing the definition of specific reference motions (response spectra for different damping values).

TL;DR: In this paper, the authors provide a basis for design of cemented aggregate fill mixes based on data obtained from experimental investigations conducted for Uludaĝ Tungsten Mine in Turkey.

TL;DR: In this paper, a probabilistic study of seismic hazard in southern Spain has been carried out on the basis of existing earthquake catalogues, using quadratic frequency-intensity distributions determined for each of the eight seismogenetic sources and azimuth dependent intensity attenuation derived from isoseismal maps.

TL;DR: In this paper, a case study of a landslide in heavily overconsolidated clay shale is analyzed to determine shear strength by back analysis and the effective angle of shearing resistance was estimated at 8.7 degrees assuming zero cohesion.

TL;DR: In this paper, a numerical model for slope stability analysis based on the two-wedge failure mode is introduced, which enables the estimation of the factor of safety associated with a spoil pile considering shear strength parameters for the main body of the spoil to be different from those of the moisture-softened material at its base.

TL;DR: In this article, the authors describe the evolution of mining practices in the collieries at Springhill, Nova Scotia, over a 40-year period during which 525 bumps or rock bursts were recorded in the No. 2 Mine, where mining progressed to a depth of over 4000 feet.

TL;DR: In this article, the Hammana area was investigated for slope failure phenomena and the causes of mass wasting were environmental, i.e. geomorphologic and climatic, internal causes inherent in the geology and engineering properties of the materials, and external causes having to do with natural and/or man-induced vibrations.

TL;DR: In this paper, a stochastic creep model which allows for large variations in strength and size of the involved rock mass is outlined, which is analogous to a previously developed concept for clastic materials, is shown to account rather well for typical creep behaviour of rock at moderate stresses and temperatures.

TL;DR: In this article, the authors analyzed the macroseismic fields of the earthquakes which have occurred in Central and partly Southern Europe under the following two aspects: (1) determination of a generalized circular isoseismal field and its dependence on the epicentral intensity, and (2) application of the obtained results to higher magnitude.

TL;DR: How linear programming can be used to incorporate nonlinear relationships in a profit maximization problem involving mining is demonstrated and interest rates are examined to examine how interest rates can beused to estimate future uncertainty and be used as a policy tool to promote conservation.

TL;DR: In this article, all earthquakes with epicenters in the southern part (latitude λ < 40°N) of peninsular Spain, contained in the Spanish catalogue (1982 version), are analyzed by means of extreme-value techniques.

TL;DR: In this article, a borehole probe is used to detect changes in gas flow patterns of in situ strata; its use on working longwall faces is fully described and a model is derived showing how the changes in stress around a coal face affect the ability of the strata, and especially the seam being worked, to transmit firedamp.

TL;DR: In this paper, the in-situ rock strength of the 830 orebody of the Copper Cliff South Mine is estimated using the NGI tunnelling index and the CSIR geomechanics classification.

TL;DR: In this article, the seismic risk of buildings depends on a number of factors and the most important among them are presented here. They are based on an extensive statistical analysis of earthquake dati4ge to buildings recorded after more than 25 earthquakes in many parts of the world.

TL;DR: In this article, the authors used the compressibility factor, Z, which measures the deviation of a real gas from ideal gas behavior, to calculate the detonation state conditions, used in earlier efforts to describe non-ideal explosive gas behavior.