... ABSTRACT: This paper is in two parts. The first part presents an overview of the strength of intact rock. A short commentary on various methods of fitting failure criteria to experimental data follows, it is demonstrated that the method of fitting the criterion to the test data has a major...

... repository quantity repository contaminated soil criteria contract remediation contract construction remediation project albion explosive facility objective development plan contamination land use MANAGING RISKS IN A LARGE REMEDIATION PROJECT ALBION EXPLOSIVES FACILITY Peter N. Thornton1...

...- directional flow conditions. Conventional filtration criteria for geotextiles, established for steady flow conditions, state that for a uniformly graded soil, geotextile opening size must be smaller than a characteristic diameter of base soil, say D85 (some times this criterion also involves relative density...

... such as bridging the area or backfilling the empty stopes were also costed. To aid HDC a risk based decision making process was developed. A key element of the professional advice to HDC was the compilation of risk criteria established by various public organisations (Figure 4). The decisions concerning the future...

...-based approach facilitates the communication of the realities of landslide risk to the public. In some jurisdictions, risk criteria have been established for which compliance must be demonstrated. In Switzerland and France, the development of statutory risk mapping has prompted legislators to ask...

... of the major criteria of the project is to control the post construction settlement of road embankments, which have been constructed as either "rockfills" or "earthfills". This paper presents the measures used to control the compaction and settlement of the fill embankments, as well as the results of field...

... with the relevant Rock Mechanics criteria. 1 INTRODUCTION Location and Geology Western Areas Gold Mine is situated approximately 50 km South West of Johannesburg, near the town of Westonaria. The mine chiefly exploits the conglomerate strata of the Upper Elsburg and Ventersdorp contact reefs of the Witwatersrand...

... ABSTRACT: A theoretical method to calculate ground stresses, strains and displacements around a circular tunnel under initially hydrostatic in situ stress field is newly presented. In the analysis, peak and residual strength criteria for rocks are proposed, and new boundary conditions between...

... the influence of different peak strength criteria. 1 INTRODUCTION The occurrence of mechanical instabilities, which can result in complete or partial collapse of wellbores, remains a continuing problem in the drilling of deep petroleum boreholes. Instabilities may occur during or shortly after drilling...

... the geological and geotechnical conditions, and the criteria for the positioning of the cavern, the design of flexible support (shotcrete and bolts), and the anchoring of crane beams. 1.- SCHEME DESCRIPTION The Manabao-Bejucal-Tavera (MBT) project is a hydroelectric project that develops the upper reaches...

... as an equivalent continuum, a 3-D strength crite- rion is generally required. Two of the classical strength criteria in incremental plasticity theory are the Mohr-Coulomb and Drucker-Prager crite- ria which define the simple yield surfaces of Fig. 1 in 3-D principal stress space. A suitable shape ofyield surfaces...

... Abstract: For many years the decision for using steel liners in a pressure tunnel was fundamented on empirical criteria, evaluating the stress level based on vertical and horizontal overburden. During the last years the hydraulic fracturing test has been developed as a fundamental tool...

.... These factors have a close tie with the stability of the surrounding rock. In accordane with the preceding five main factors affecting stability, we have made a complete analysis of many actual karst caverns in Chongqing and proposed a stability index as the criteria to determine the stability of karst caverns...

... SUMMARY: The Mauranger Hydro-Electric Power Plant in Western Norway utilizes a 455 metre static head unlined pressure shaft. The paper describes the investigations performed and the criteria applied for the design of the shaft. ZUSAMMENFASSUNG: Die Wasserkraftanlage Mauranger in West...

... examined and classified according to the system of classifying rock core samples described in Table 1. Of the four classification criteria used, the hardness of rock fragments, the interval between adjacent fractures, and the fracture condition are independent criteria. The criterion of RQD...

... the tunnel is located deep below the ground surface, the tangential streSS O~e given by equation (2) increases beyond r5 elastic limit of the rock,which then ente the plastic state. If the rock conforms 1 to Mohr-Coulomb's yield criteria (internal friction theory), it behaves like an idea' elasto-plastic...

... Reservoir Characterization shield assumption ground structure safety different country Engineer safety concept stiffness soft soil tunnel structure bedded ring design criteria tunnel structural design model criteria Design Procedure excavation design model deformation...

... were established through the use of regression analysis (least squares method) with the following criteria: IV.27 _0- D3/2 D 01/3 The adoption of une of the criteria (equation) was based on the considerations of the correlations obtained between VR = f (Q, D), and verifications resulting from...

... to which the dam was subjected to be kept within acceptable limits. Upstream Oil & Gas criteria diameter excavation hole distance Spain Villalcampo Dam vicinity auscultation system operation altitude nuclear plant turbine hall iberduero linear metre left hand buttress buttress...

... Summary After reviewing the classic criteria of structural damage due to ground vibrations caused. by rock, blasting, their assumptions, and limitations are pointed out, particularity when dynamic stability analysis, are to be performed. A new criteria, based on the balance between...