... ABSTRACT: The Geotechnical Stope Index aims to highlight the ore's dilution potential. The profile uses calculations to consider historical observations and geotechnical data analysis to identify potential geotechnical hazards about overbreaks in sublevel stoping. After each step, a column...

... open stoping. From 1990, KTO experienced a succession of mine-scale instability events whilst mining in the central area with room and pillar. Kongolo, 1998 suggested that the pillar run occurred over a period of approximately 10 months. No personnel were injured in the collapse event, as the mine had...

... engineering environment. geology data mining knowledge stope geologist europe government extraction austria government australia government hard-rock pillar leoben pillar metals & mining strength stope extraction sequence international conference magnitude ladinig 2022 caving...

... or more sill pillars in each mine plan. INTRODUCTION Longhole mining is a popular method for the extraction of steeply dipping ore deposits. In this method, the orebody is divided into sublevels and each sublevel is further divided into stopes. The method, also known as sublevel stoping, is widely...

... and FLAC3D were examined, and the transformation technique of integrated 3D solid model was given via Excel. Then, the proposed method was applied for analyzing the pillar stability for sublevel open stope method in 0# upper level of the target mine. From the simulation results, heights of the upper...

... ABSTRACT: This paper assesses the fracture development characteristics of the rock mass around the sublevel and shrinkage stopes under steep thick orebody using 3DEC and Surpac, and redetermines the boundary of the protective pillar area for the dressing plant. A 3D solid model was constructed...

...-and-fill mining method requires consideration of the mining sequence to mitigate the instability risk due to excessive stress concentration in stopes scheduled for production. This study covers the effects of production sequence on the crown pillar and the global mine stability using numerical modeling...

... 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...

... and 384 km from the country capital Brasília (Figure 1). Currently MSG runs three active underground and four open pit operations. The Sublevel stoping, Top-Down mining method has been responsible for more than 50% of the gold production of MSG in the present days. Because of the wide application...

... mine excavations (stopes). Backfilling underground mine stopes with CPB has become a common practice and an integral part of supported underground mining methods (e.g. Belem & Benzaazoua 2008). For the CPB to be an effective structural component, it must develop some uniaxial compressive strength...

... metals & mining shotcrete formula upstream oil & gas barricade reservoir characterization strength shotcrete application stope equation stability application paste backfill compressive strength reservoir geomechanics wrb gneiss shear strength calculation brazil...

... pillar sill pillar inclination upstream oil & gas reservoir characterization dilution reservoir simulation sill pillar thickness stope reservoir geomechanics orebody stability configuration hanging wall stability chart variability estimation strength sublevel sill pillar...

... Abstract To facilitate faster and safer ore extraction in tandem with paste backfilling it is important to design and construct barricades faster with the required pressure bearing capacity in the stope entry points prior to backfilling operations. Stability of the barricade is extremely...

... Abstract The recovery of a mined zone in an underground mine depends on the rock mass behavior related to the excavation opening, changing stress conditions, stope dimensions, opening exposure time as well as other contributions. This case study analyzes the mining method used to recover...

... analysis. We assess the stability of open stopes at mining levels V and VI at the Niobec Mine, Quebec, Canada. The stability around each open stope is evaluated by calculating the compressive POF, using the Hoek-Brown compressive safety factor (SF). Comparison of these probabilistic numerical model results...

... and inclined angle of stope were analyzed whether affected the maximum tensile stress. The result suggested that the value of maximum vertical displacement increased with inclined angle increasing and the position of maximum vertical displacement moved from two sides to center. When the inclined angle was 90...

... metals & mining rockburst journal criteria gold mining malan convergence napier stope excavation tabular excavation reservoir characterization southern african institute deformation tabular stope south africa increment criterion rock mechanic reef johannesburg...

... Abstract The Sublevel Open Stoping (SLOS) method has been increasingly executed at Serra Grande Mine (SGM), being responsible for more than 50% of the current ore production. During the execution of the mining, several factors influence its performance, among which we can highlight...

... Abstract The unplanned or external dilution is an index with an extreme relevance in a narrow vein sublevel stoping mine. Its increase can elevate the costs associated with the transport, processing and tailings disposal. Therefore, the definition of strategies to estimate and reduce...

... Abstract This paper illustrates the closure data that was collected in the Gold Mine shaft pillar during the extraction process of this pillar. The use of closure measurements as a diagnostic measure of rock mass behaviour in deep tabular stopes have been described in a number of publications...