... horizon and the time effect characteristics of microseismic events and pressure of support all verifies the effect that the subsidence of the one side overlying strata induces the rise of another side. The critical disturbance distance of the roof between two mines is 580-1900m. When the comovement effect...

... for economical production. Recently, it has been shown that rock mechanics may offer a huge cost saving potential during field abandonment, as the rock itself may restore the sealing capability of the cap rock given the right conditions. On a larger scale, reservoir compaction and surface subsidence also imply...

... Abstract In mine areas, ground movement such as surface subsidence and landslide is frequently caused by the influence of mining work in the past or at present. It is of great importance to assess the hazard of the disaster to reduce the consequent damage from it. This study aims to assess...

... but also fresh air entrance in the voids. Gas can also migrate underground through overburden strata potentially affected by former underground mining activities (e.g. dewatering, subsidence, formation of cracks or fractures). Gas migration between mining voids and the surface is mostly driven by pressure...

... with analytical and experimental data showing the validity of the computational implementation. 1 Introduction Surface subsidence is an important phenomenon in hydrocarbon recovery, which can be the reason of casing deformation, sand production, and damage to drilling and production equipment, etc. (Simon et...

... permeability-porosity exponent porosity subsidence simulator reservoir characterization pore compressibility inoue coupling breakthrough black-oil reservoir simulation displacement Rock Mechanics for Natural Resources and Infrastructure Development Fontoura, Rocca & Pavón Mendoza (Eds) © 2020...

.../cable and verifying the analytical results with the in-situ monitored data from the underground coal mine. cable equation figure frictional coefficient reservoir geomechanics application subsidence structural geology deformation elongation manchao upstream oil & gas reservoir...

... fabric on cave propagation and the evolution of caving-induced surface subsidence and step-path failure of large open pit slopes through the progressive failure of rock bridges. The results clearly showed that caving-induced surface deformations tend to be discontinuous and asymmetric due to large...

... Abstract This contribution describes linkage of stress concentration at the face of tabular excavations, for example, longwall coal mine panels, at a meter scale to surface subsidence at a kilometer scale. Joints are considered according to orientation and spacing at an intermediate scale...

... Abstract One of the most concerns of room and pillar mining system is subsidence of the ground surface due to coal mining particularly in room and pillar mines. Subsidence of ground surface is a result of floor, pillar, or roof failure of the mine. At the same, due to many difficulties...

...INVESTIGATION OF GEOMECHANICAL MECHANISMS CONTRIBUTING TO VALLEY CLOSURE SUBSIDENCE EFFECTS A 3D NUMERICAL MODELLING APPROACH *C. Zhang and, R. Mitra, J. Oh, B. Hebblewhite School of Mining Engineering, University of New South Wales Sydney, Australia 2052 (*Corresponding author: chengguo.zhang...

... to propagation of a caved zone toward the surface and formation of chimney subsidence. Chimney subsidence has numerous catastrophic consequences such as the adverse environmental impacts and damage to surface structures in vicinity of excavations. Due to the importance of subsidence in civil engineering...

.... By using the fractal geometry, the evolutional law that the fractal dimension of mined crack network varied with mining width, underground pressure, and rock strata subsidence coefficient is studied. The effect of fault on the evolutional law and coal seam thickness on the fractal dimension are analyzed...

... cities, towns or high priority growth areas and are now adversely impacting surface developments due to fear of mine subsidence. Many of these old mines were operated with the room-and-pillar mining method and represent a major subsidence risk where standing and/or partially collapsed workings lie within...

... that the entire parting above the 4 Seam goaf may settle over the sand. In such a scenario the sub-surface subsidence may extend to the working areas of the top seam BG district. The magnitude of the sub-surface subsidence in the event of a parting settlement is evaluated using three-dimensional influence...

... of the strength parameters of rock mass. If these problems are solved, it will be possible to execute back analysis utilizing more information, such as displace- ment ahead of the tunnel face and surface subsidence. In addition, it is possible to estimate the area with inelastic behav- ior and time-dependent...

... ABSTRACT The ceasing of a two centuries intense French underground mining industry has let a stupendous number of disused mines exploited by the room and pillar method. By the end of the 1990s, a series of catastrophic ground collapse and subsidence phenomena in urbanized zones occurred...

... ABSTRACT The surface damage in an abandoned underground limestone mine in Korea is observed to be of different forms from simple sinkhole formation to a large scale landslide of the ground in the subsided area. For the prevention of damage, it is very important to predict an extent of ground...

... metals & mining fault reactivation Durham Coalfield groundwater level groundwater friction mining activity houghton-le-spring groundwater level change Coal Mining Donnelly hydrogeological condition orientation apparent coefficient subsidence pore water pressure ABSTRACT...

... mining instability drill pipe selection Thickness Illinois Engineer instn Metall subsidence thickness rule structural geology pillar failure information instability strata US government strength roof rock shallow depth void migration 11th Congress of the International Society...