Mines with exceptionally low-strength roof (UCS <3,500 psi and CMRR <40) are much more likely to struggle with roof falls than other mines. Weak roof is a particular problem for many room and pillar mines in the Midwestern and Northern Appalachian coal basins. Traditional roof support techniques are often not up to the challenge at these operations. This paper focuses on two mines, one operatin...

In recent, the placement of backfill in underground mines has emerged as a new paradigm in research as it not only improves safety but also allows disposal of byproducts including coal ash. In this regards, this paper addresses the backfilling challenges in limestone mine to prevent sinkhole and subsidence. Limestone mines, generally regarded as being safer than coal and metal mines, have been ...

sources which were used for minting coins may help us recognize the mines that parthians used for mint houses that were marked on their coins. these signs may solve many politico-economic issues or may even lead to the recognition of their mines. the coins under study were related to ecbatana mint house and were extracted from silver mines through cupellation. the chemical composition of these ...

Acidity of water from abandoned underground mines decreases over time, and the rate of decrease can help formulate remediation approaches and treatment system designs. The objective of this study was to determine an overall acidity decay rate for above-drainage underground mines in northern West Virginia from a large data set of mines that were closed 50 to 70 yr ago. Water quality data were ob...

We present the software architecture of a robotic system for mapping abandoned mines. The software is capable of acquiring consistent 2D maps of large mines with many cycles, represented as Markov random fields. 3D C-space maps are acquired from local 3D range scans, which are used to identify navigable paths using A* search. Our system has been deployed in three abandoned mines, two of which i...

in all over the world, mining is considered as a high-risk activity that is pregnant with serious disasters not only for miners, engineers, and other people into it, but also for people who live near the mines. in this article, our main purpose is to examine some major mine disasters and safety in mines and the case study is a coal mine in turkey. safety in mines is one of the most important is...

background: in this study are submitted the radon concentration measurement results of four underground mines: stanterg, artana, hajvali and badovc, which are owned by trepça enterprise, kosovo. the mines have the same geological formation and from these mines are extracted ores rich with lead, zinc, silver, and gold. the radiation exposures caused by radon and radon daughters was determined an...

Colorado School of Mines, Hydrologic Science and Engineering Program, Golden 80401, CO, USA University of Colorado at Boulder, Institute of Arctic and Alpine Research, Department of Geography, Boulder 80309, CO, USA Colorado School of Mines, Department of Geophysics, Golden 80401, CO, USA d ISTerre, CNRS, UMR CNRS 5275, Université de Savoie Monte-Blanc, 73376 cedex, Le Bourget du Lac, France Co...

Chief Medical Officer, Mines Board of Health, Asansol. The article by the editor in the Indian Medical Gazette for December 1924 on " Some Experiments for the Solution of the Rural Health Problem in. India " makes it likely that an account of the outdoor organisation of the Asansol Mines Board of Health may not prove uninteresting at this juncture. The Asansol Mines Board of Health, which is co...

1 Université de Toulouse ; INSA, UPS, Mines Albi, ISAE ; ICA (Institut Clément Ader) ; Campus Jarlard, F-81013 Albi cedex 09, France Ecole des Mines Albi, Campus Jarlard, F-81013 Albi, France. 2 LAAS-CNRS, Université de Toulouse, Toulouse, France 3 Institut de Mathématiques de Toulouse, Université de Toulouse, Toulouse, France 4 Faculté de Génie Electrique, Université Technique Tchèque de Pragu...