This article presents the application of a self-excited acoustic SAS system for non-destructive testing (NDT) roof-bolt housings in laboratory and real mine conditions. The proposed with filtering mechanism was applied to J64-27 composite anchors. conducted tests allowed successful confirmation usefulness detection rod defects, damage coupling anchor rock mass stress state itself. eliminating e...

The Boundary Element Method has been applied to calculate stress distribution and stability of underground mines for disposal of chemical waste. A case similar to the Stripa mine in Sweden has been considered. The rock mass was granite, with major fracture zones represented by three families of planes mutually orthogonal and 100 meters distant from each other. The pre and post processor GiD [3]...

Mining operations at Bingham Canyon Mine, Utah, 2009 by Arbyreed. License: CC BY-NC-SA 2.0 Land worldwide is deeply marked human activity, which became heavier, harder, more wasteful, and permanent after the industrial revolution. The landscapes of Anthropocene encompass riddled proving ground test sites, nuclear wastelands, immense open-pit mines, contaminated lands, disappearing bodies water,...

This paper studies the concentration rules of different components exudate based on original soil column test by using coal mine pit drainage and tap water as filter fluid to simulate water-rock interaction in sewage irrigation, clear irrigation or precipitation filtration, results show that is mainly dissolved soluble salt, followed cation exchange adsorption. The carbonic balance movement occ...

A new type of cosmic-ray experiment is under construction in the Pyhäsalmi mine in the underground laboratory of the University of Oulu, Finland. It aims to study the composition of cosmic rays at and above the knee region. The experiment, called EMMA, will cover approximately 150 m of detector area. The array is capable of measuring the multiplicity and the lateral distribution of underground ...