... remediation geologist buntsandstein geology rock type netherlands government drilling sonic drilling backfill geotechnical investigation recovery drilling rig north sea obstacle island seawall construction differential settlement coastline 15th ISRM Congress 2023 & 72nd Geomechanics...

.... Initial Data A research team at the Nazarbayev University School of Mining and Geosciences laboratory produced the raw data for this investigation. On a rock cube with blocks that had holes of various diameters, backfilled with various cement/sand ratios, and fractured to mimic various mining conditions...

... metals & mining stope mechanism barricade backfill interaction upstream oil & gas waste management construction reservoir characterization paste backfill self-weight consolidation backfill placement particle figure preparation stability binder journal frictional...

... backfilling experiments were conducted as well as the degree of backfilling. The results indicate the joint geometry (dip angle) has adverse effects on the pillars strength. It was further realized that the effects of joint inherent properties are less pronounced on the joint dip angles perpendicular...

... Abstract In this paper, formulas are proposed for rational and realistic sizing of barricades made of development waste rock as cemented paste backfill retaining structures in underground mining operations. The formulas, which take into account the application or not of shotcrete, allows...

... cavity cavern backfill classification upstream oil & gas himalaya dimensional numerical figure 8 reservoir characterization young excavation reservoir geomechanics construction q-system deformation resistance mpa instability loosening powerhouse cross-section barton...

... Abstract Backfill as a substitute of ore body can reduce the ground subsidence and transfer the stress of surrounding rock mass. It was most important to keep the backfill stable in mining activities. Past decades, many researchers analyzed the stability of backfill considering it as block...

.... The data collected over a period of five years, when different support types were used, indicated that cemented backfill reduces the closure rate substantially. This reduces the amount of seismicity per area mined according to earlier work done in the industry. As a drawback, the backfill increases...

... contribute to higher strength development of the Gelfill samples. KEYWORDS Gelfill, Cemented Hydraulic Fill, Sodium Silicate, MIP, Mine Backfill, Mixing Time INTRODUCTION The increased depths of mines in the Canadian Shield and the high stress associated with these depths favour a new method of mine backfill...

... Abstract In this paper, the compressive strength and failure patterns of reinforced cemented paste backfill (CPB) were studied aiming to promote the stability of backfilled stopes. The concept of ductile backfill was proposed and a series of unconfined compression tests were carried out...

... ABSTRACT The safety assessment of a radioactive waste disposal facility in a deep geological formation requires to consider its hydromechanical behaviour, especially in the post-closure phase when the cavities are backfilled. The linings are subsequently no longer maintained...

... of the panel collapses that occur on the face area of the UG2 panels mining underneath the Merensky pillars. Inelastic numerical modelling was performed to determine if the use of backfill could improve this extraction ratio and at what depth below surface it is required. tensile failure Reservoir...

... metals & mining mix design binder requirement cementitious binder specification pipeline investigation accelerator strength development deformation strength AngloGold shotcrete pipe-support system Steward pillar mechanics backfill construction product Consultancy report...

... is into the mountain slope. The overburden varies between 0 m and 1,000 m. The mining method employed is post pillar mining with uncemented backfill. The pillars are rectangular in cross-section with a width of ~5 m and a length of 15 m. In a first step a 7 m high opening at the deepest point of a mining area...

... of a Deepmine project. Upstream Oil & Gas risk estimator application metals & mining event magnitude layout structural geology extraction evaluation backfill threshold value mining layout technology roadmap pillar Reservoir Characterization geological model Rock mechanics plane...

... not adequately represent the heterogeneity of the rockfill resulting from aggregate segregation when the rockfill is placed (Reschke, 1993). This problem can be addressed by placing instruments in the rockfill to measure mining-induced stress and strain. As part of a safety and stability assessment of backfill...

... considers the stope design methods, the dilution due to hanging wall instability, its impact on economics. cablebolt support stability backfill metals & mining dilution access development production rate stope economics graphitic shear mining method instability ore secondary stope...

... Rock mechanics optimine pillar stress extraction pillar shear displacement Reservoir Characterization mining area technology roadmap geological structure option 3 backfill remnant pillar evaluate risk 713 Le Bron, K.B. et al. The application of Optimine to evaluate risks associated...

... deformations to be accommodated by the shaft steelwork designs. The option chosen was a combination of strategically placed satellite pillars and yield pillars, and backfill. Following the mining of a small inner cut during the shaft sinking process, full-scale mining is progressing away from the shaft...

... excavations; condition of tunnel support elements due to corrosion; siting of tunnels; ineffective gully support; shape of remnant pillars and poor backfill usage. An important aspect of the project, in addition to the rockburst investigations themselves, is the measurement of excavation skin response...