Estimation of the height of caved and fractured zones above a longwall panel along with the stability conditions of the goaf area are very crucial to determine the abutment stresses, ground subsidence, and face support as well as designing the surrounding gates and intervening pillars. In this work, the height of caving-fracturing zone above the mined panel is considered as the height of destre...

Longwall mining is one of the most widespread methods globally. During preliminary development working, coal seam sectioned into panels divided by protective pillars. The pillars are necessary for maintaining service life underground mines, a highly productive stope, and personnel safety. In this work, we apply finite-difference continuum damage mechanics approach to modeling stress–strain evol...

Purpose. Coal mining activities by underground method will disrupt the equilibrium of surrounding rock mass. In mining, determining influence zone exploiting longwall on topographic surface is extremely important.Through analyzing displacement and deformation mass when 21103 in Seam 11 at Nui Beo Mine, to be determined this order forecast boundary that may affect works, ensuring safety such wor...

The basis of traditional ground pressure and strata control techniques is the key theory, wherein position stratum can easily be determined for coal seams with regular thickness without goaf. However, in case mining ultrathick underneath goaf, methods used calculation need to improved order account additional seam presence an upper This study analyzed failure height collapse characteristics ove...

Thick coal seam no. 3, block V, Lupeni mine was mined by longwall top caving (LTCC). After the mining, ground surface underwent continuous subsidence, but since 2008, three sinkholes have appeared on with important dimensions, atypical for geo-mining conditions in this basin. This article is a synthesis of study meant to decipher geo-mechanical phenomenon that led emergence these and highlighti...

In this paper, the capability of determining three dimensional (3D) ground displacements due to underground mining using multiple ALOS PALSAR interferometric pairs acquired with different viewing geometry has been demonstrated in the area of West Cliff colliery, for longwall 32. 3D displacement maps have been derived from four interferometric pairs acquired from two different incidence angles e...