The face stability of shallow tunnels was investigated with small-scale model experiments at single gravity. Aim of the research was to detect the evolution of failure mechanisms in dense and loose soil samples with varying overburden above the tunnel. Moreover, the quality of proposed theoretical/numerical approaches for the determination of a necessary support pressure pf was assessed. The re...

Coal and lignite play a major energy supply role in many European countries, including Bosnia and Herzegovina. Yet mining activities are a heavy source of ecosystem contamination, posing significant environmental threats. The primary goal of this study was to isolate and identify autochthonous lignite mine spoil bacteria and evaluate their potential in bioremediation of these polluted soils. Tw...

In extra-thick coal seams, mining operations can lead to large-scale disturbances, complex overburden structures, and frequent and strong strata behavior in the stope, which are serious threats to mine safety. This study analyzed the overburden structure and strata behavior and proposed the technique of confined blasting in water-filled deep holes as a measure to prevent strong rock pressure. I...

Many state and national geological surveys produce map products from surficial and bedrock geologic maps as a value-added deliverable for a variety of stakeholders. Improvements in powerful geostatistical exploratory tools and robust three-dimensional capabilities within geographic information systems (GIS) can facilitate the production of derivative products. In addition to providing access to...

Purpose.In this paper we present and validate an analytical model of water inflow rising level in a flooded mine examine the robustness sensitivity to variations input data considering examples three closed hard-coal mines Germany. Methods. We used solution boundary value problem radial ground flow shaft, treated as big well, balance relations for series successive stationary positions depressi...

Acid-Base Accounting (ABA) is an analytical procedure that provides values to help assess the acidor alkaline-producing potential of overburden rocks prior to coal mining. This procedure was developed at West Virginia University in the late 1960s. After the passage of laws requiring an assessment of surface mining on water quality, ABA became the preferred method to predict post-mining water qu...

To better understand and interpret seismoelectric measurements acquired over vadose environments , both the existing theory and the wave propagation modelling programmes, available for saturated materials, should be extended to partial saturation conditions. We propose here an extension of Pride's equations aiming to take into account partially saturated materials, in the case of a water–air mi...