Purpose.This article proposes to analyze and determine the mining design for shallow-dip deposits hosted in poor quality rock. Methods. We used UBC tool find optimal exploitation method, Rock mass rating (RMR) Q-system (Q) stope recommended rock support, numerical modeling by RS2 software with a variety of geotechnical, geometrical, technical conditions evolution unstable zone width maximum tot...

Optimisation of three-dimensional (3D) underground stope layouts is a computationally complex process since it involves the modelling many variables and constraints. As number constraints increases to reflect actual mining practice, model complexity solution time tend increase exponentially, making optimisation problem intractable. Metaheuristic approaches have therefore been used predominantly...

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...

Stope with variable length is formed by change of mining face due to the irregular distribution geological rock pillars, which a typical representative complex coal seam mining. According geometric characteristics and mechanical boundaries each stage stope length, roof structure models four boundary conditions were established solved successively using small deflection thin plate bending theory...

Variations in rock mass properties are well-established mechanics and underground mining. The literature is replete with methods of assessing them determining values that used design or numerical analysis. In this paper, a simplified 3D model constructed for tabular orebody the Canadian Shield instability quantified using ”brittle shear ratio” criterion to calculate volume at risk. A 1-4-7 stop...

Continuously poured paste backfill dramatically improves underground mining efficiency through reduced stope cycle time and simplified logistics. For longhole stopes, a “plug” is to few meters above the undercut brow must gain sufficient strength prevent failure plug when “main” pour begins. A novel, rational engineering design approach that determines required developed. The potential mechanis...

Excavations at the Giro mine located in commune of Sainte-Marie-aux-Mines (France) have revealed a metallic and cylindrical artifact that resembles connecting element for wooden duct sections. Early modern literature, especially De Re Metallica, mention such technologies intended particular to force ventilation underground mines which air quality was harmful miners. The found gallery leading st...

The choice of transportation system has an important impact on the production efficiency and economic behavior underground mines. Trackless vehicle gradually become main method in mines because mining companies have realized that can be improved using advanced mechanization automation process. extracted ore is loaded onto trucks by loaders situ, then drive to passes for unloading Trucks load un...

The creep behavior of deep weak rock masses is important due to an underground opening. Appreciating the nature and source these deformations requires knowledge mass ground support interaction. theoretical solution backfill’s internal stresses needs consider time-dependent effect. In present study, coupling interaction between nearby material in backfilled stope considered characteristics are g...