... south africa government reservoir characterization rectangular pillar geologist data mining geological subdiscipline pillar layout pretoria equation pillar metals & mining pillar strength circular pillar geology geometry dimension napier university malan reservoir...

... geologist asia government geological subdiscipline interchamber pillar geology metals & mining information simulation flac3d north korea government reservoir geomechanics stability surpac mathematics of computing democratic people modeling orebody republic ansy pillar...

..., structural mapping of the panel was carried out in seam XVB. Further, an attempt has been made to estimate the factor of safety of the existing pillars, the rock load on the galleries & junctions of seam roof using both the methods. Finally, using the existing support design, the support safety factor...

... ABSTRACT: In underground mining, rock pillars are frequently utilized to provide support within the deposit. Many of these pillars, either due to their geometry or the stress field acting upon them, experience inclined loads. Hence, this study aims to develop local models to analyze the impact...

... ABSTRACT: This paper presents an assessment in terms of the influence that blast damage can have over rock pillars and the behavior of rock mass using 3D numerical modelling. The utilization of this approach enables the calibration of model parameters and highlights the framework concerning...

... geological subdiscipline university modeling excavation geologist reservoir geomechanics excavation continuum voronoi block model cvbm strength field-scale simulation continuum voronoi block model-cvbm particle mpa upstream oil & gas simulation creighton granite pillar displacement...

... pillar geological subdiscipline calibration figure 3 south africa government texan layout geologist reservoir geomechanics malan numerical table 1 geology metals & mining hangingwall geometry couto closure pillar strength mpumalanga province pretoria lobe...

... and prediction of the consequences of climate change on the stability of abandoned subsurface cavities (Conil et al. 2022). According to climate changes, water level variations and changes in water saturation degree in the pillars of the mine should be observed because of the unpredictable modification...

... ABSTRACT: The study of rock pillar stability is a common concern in mining engineering. It is critical to enhance predictive research of the mining effect and improve design to avoid catastrophic failures in mines operating at great depths. This results in the creation of pillars that must...

... the highly stressed coal seam under massive strata safely and efficiently. INTRODUCTION The prime stability problems at the time of the exploitation of deep-seated coal reserves by underground mining are high in-situ stress conditions causing in bump/burst viz., strain bursts, pillar bursts, and fault...

... geologist copper mining native element mineral sedimentary rock africa government rock type clastic rock copper metals & mining geology pillar orebody succession kamoto copper company beck engineering pty ltd extraction stabilization pillar instability pillar strength...

... ABSTRACT: In Longwall mining, gateroads play a major role in transporting men and materials and providing ventilation. Barrier pillars lie between two adjacent panels to support the face and gateroads. During the retreating, these gateroads and barrier pillars are subject to mining-induced...

... pillar sandstone upstream oil & gas hydraulic fracturing reservoir geomechanics hf operation application effect strata fine-grained sandstone tailgate fracture ABSTRACT: Hydraulic fracturing (HF) has emerged as a widely used ground control strategy in Chinese coal mining practice...

... ABSTRACT: Raise Caving is a novel mass mining method utilizing an active stress control approach for the foresighted, strategic and systematic control of rock pressure. The active stress control approach is based on a slot-pillar system, which is established prior to large-scale mineral...

... sensor mining-induced seismicity fault plane solution abutment pillar tensor ABSTRACT: Mining-induced seismic events in South African deep-level gold mines cause hazardous working conditions, damage infrastructure, delay production and pose a risk to miners. A good understanding of seismic...

... quarries. the authors will consider stability for individual structure of room and pillar type based on the numerical analysis with considering influence of adjacent underground spaces. Finally, the authors will discuss the maintenance process to utilize the underground quarries analysis. INTRODUCTION...

... ABSTRACT: The electrical resistance measurement system (ERMS) was tried to be developed. The first in-situ applications were carried out in A6 panel in GLİ underground coal mine. As perpendicular to the pillar face, two parallel boreholes with 4 m long and interval 30 cm were drilled...

... ABSTRACT: The Siphumelele Mine orebody has been mined extensively up to a depth of up to 1400 m below surface. Apart from stope support, stability of the reef horizon is provided by regional stability pillars support as well as local "crush pillar" support. These pillars are designed so...

... ABSTRACT: A fibre optic monitoring system has been installed in two limestone quarries in Valkenburg aan de Geul, The Netherlands, to monitor pillar stability and to give early warning of locations at risk of collapse. The system is highly sensitive and can detect creep deformation...

... ABSTRACT: Strata control problems are observed more in dipping coal seams than flat coal seams due to shearing effects, asymmetric failure and stress distribution in inclined rock strata. As most of the pillar strength formulae are derived for the conditions of flat coal pillars...