... it can be somehow limited extraction using longwall face. This method is respectful of the overburden and excavated areas stay stable. The paper deals with the issue of stability and stabilization of coal pillars by using rockbolt support. The problem with this method is currently designing pillars so...

... of this study is to achieve safer stoping environment with an increase in stope interval from 30 to 45 m to enhance production and productivity with safety. reservoir geomechanics Upstream Oil & Gas extraction stability Reservoir Characterization displacement operation crosscut wall movement...

... in the area of about 122 km 2 of active mines and a complex slide/overlap fault system. The fact that the extraction of coal by this method is realised at a depth around 900 m below the surface has also made it one of the deepest Room and Pillar mining sites in the world. These facts brought lead to several...

... than 3D laser scanning, is becoming mainstream within the research community. This paper examines the generation of 3D point clouds of a rock slope obtained from both, 3D laser scanning and SfM techniques, and their application to the extraction of the orientations of the main discontinuity sets...

... Element Method. This model represents the sequence of extracting the crown pillar in 26 mining steps by applying the Long Hole Open Stope Mining Method with a backfill. The modeling was aimed at performing a detailed stress-strain state analysis of the crown pillar and the open stopes in it, detecting...

... ABSTRACT: Excavation for underground spaces (especially copper mines), requires accurate identification of the ground condition. One of the problems that can arise due to the extraction of underground resources is land subsidence that can affect mining activities both technically...

... ABSTRACT: An underground copper ore deposit below an open pit mine is to be extracted using large diameter blast hole (LDBH) method. This paper is focused on static and dynamic responses of LDBH stopes of dimension 60 m height, 20 m width and varying length. In a single round, about 3 tonne...

... as a source of information for the detection of tectonic structures. In this paper, the authors present a new approach for semi-automatic extraction and characterization of geological lineaments. The overall positive aspects of this semi-automatic process were found to be the rapidity of preliminary...

... Abstract In India most of the coal mines are developed by bord and pillar method. In many of the mines the extraction of pillars are being restricted due to its surface constraints. A considerable amount coal is left in pillars due to this reason. This paper deals with the application...

... by studying seismic events during extraction of two seams in the study Mine 1 using both side-by-side and panel-barrier designs. Based on similar simulations for geologic conditions of the study Mine 2 and available measurements in the study mines in Utah, the model shows a low degree of seismicity if an 800...

... of friction decreases, while the shear stiffness and dilation angle of the fault do not exert a severe influence on the behaviour of the fault. It is also shown that significantly high shear rupture velocity could be induced by extracting the orebody parallel to the fault. 1 Introduction Fault slip burst...

... Abstract In this article, the authors present the outcomes of their studies on the dynamic characteristics of ground and amplification of ground motions above abandoned mines and discuss their implications. In addition to the effects of some parameters associated with extraction, some...

... features assessment 3. stability evaluation by numerical models 4. Risk scenarios development. The case study will show difficulties arising during the analysis of an abandoned mine and how is possible to overcome them. metals & mining Simulation extraction subsidence classification...

... Abstract: This paper describes the findings of a numerical modelling based case study to assess the feasibility for extraction of pillars with controlled subsidence of the sur-face in Mahuda Top seam III at Murlidih Bord and pillar mine under Jharia coalfield India. Controlled subsidence...

... Ganchenko The COli/POllY "ALROSA ". Mirny. Russia ABSTRACT: Numerical simulation is performed for the changes of stress field at consecutive extraction of a diamond ore deposit, The features of stress distribution around openings are examined. Failure zones ofrock mass are determined With using of Coulomb...

.... The inundation of these space formations that were drained off in the course of extraction from technological reasons, changes stress-deformation conditions in rock mass that were in the balanced state until this time. In fact, due to the influence of lifting force in the water on rock mass, the existing stress...

... footwall sketch hangingwall central section mining sidewall empirical design technique long term stability Orebody strength extraction remainder crosscut Upstream Oil & Gas shear zone convergence sequence new strategy Eurock '96, Barla (ed.) (0 1996 Balkema, Rotterdam...

... ABSTRACT: This paper describes a numerical modelling exercise carried out for a massive tabular orebody mine. Mining to date has taken place by means of room and pillar mining, with the recent introduction of backfill and pillar extraction. To access extensions to the orebody, mining has...

... performance. The first experience was a failed attempt at shortening the time required to move a longwall face installation. The second experience was the successful attempt to extract coal under very difficult conditions. 2. GEOLOGY The mining depth varied from 60 m to 160 m below surface and the average...

... by statistical methods and obtained a predictive formula for coal pillar strengths. metals & mining tilt colliery Salamon strength bord knowledge management pipeline safety factor South Africa Pillar Working subsidence pillar extraction investigation vaal basin formula Madden pillar...