scispace - formally typeset
Search or ask a question
Author

Ningbo Wang

Bio: Ningbo Wang is an academic researcher from China University of Mining and Technology. The author has contributed to research in topics: Coal mining & Impact assessment. The author has an hindex of 1, co-authored 1 publications receiving 27 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: In this article, a methodology of groundwater impact assessment for an open cut mine in NSW with a three-dimensional groundwater flow model Modflow Surfact demonstrated its functions in simulating the project's impacts on the groundwater regime.
Abstract: Large scale open cut coal mining operations have significant impacts to groundwater in surrounding areas in both active and post-mining phases. The prediction of water inflows into a surface mine excavation is one of the many components involved in mine design phase. Groundwater performance also reacts to mining activities from the operational, economic and safety implications perspective. Under NSW planning legislation, as part of the comprehensive risk assessment, a groundwater impact assessment has to be conducted for a coal project to predict and mitigate the impacts in consideration of the government requirements. In this paper, the groundwater assessment modelling of mine pits was discussed in predicting of groundwater inflows and reviewing analytical and numerical approaches. A methodology of groundwater impact assessment for an open cut mine in NSW with a three-dimensional groundwater flow model Modflow Surfact demonstrated its functions in simulating the project’s impacts on the groundwater regime. The key findings with mitigations are discussed and recommended in the paper to reduce impacts on groundwater and fulfil regulation requirements in NSW.

41 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: Groundwater chemistry of mining region of East Singhbhum district having complex contaminant sources were investigated based on heavy metals loads and other hydrochemical constituents and showed that Na+, K+, and Ca2+ ions are the dominant cations in the groundwater, while HCO3-, F- and Cl- ions dominate the anionic part of the groundwater.

120 citations

Journal ArticleDOI
TL;DR: In this paper, the authors provide an overview of recent studies using remote sensing (RS) and geographical information systems (GIS) to assess mining impacts on water, land, and society.

70 citations

Journal ArticleDOI
TL;DR: In this article, the authors used hierarchical cluster analysis (HCA) and principal component analysis (PCA) to classify and identify water sources responsible for possible groundwater mixing within rock layers, and applied Geochemist's Workbench to estimate the mixing fractions to clarify sensitive zones that may affect rock slope stability.
Abstract: Water-rock interaction and groundwater mixing are important phenomena in understanding hydrogeological systems and the stability of rock slopes especially those consisting largely of moderately water-soluble minerals like calcite. In this study, the hydrogeological and geochemical evolutions of groundwater in a limestone quarry composed of three strata: limestone layer (covering), interbedded layer under the covering layer, and slaty greenstone layer (basement) were investigated. Water-rock interaction in the open-pit limestone quarry was evaluated using PHREEQC, while hierarchical cluster analysis (HCA) and principal component analysis (PCA) were used to classify and identify water sources responsible for possible groundwater mixing within rock layers. In addition, Geochemist’s Workbench was applied to estimate the mixing fractions to clarify sensitive zones that may affect rock slope stability. The results showed that the changes in Ca2+ and HCO3− concentrations of several groundwater samples along the interbedded layer could be attributed to mixing groundwater from the limestone layer and that from slaty greenstone layer. Based on the HCA and PCA results, groundwaters were classified into several types depending on their origin: (1) groundwater from the limestone layer (LO), (2) mixed groundwater flowing along the interbedded layer (e.g., groundwater samples L-7, L-11, S-3 and S-4), and (3) groundwater originating from the slaty greenstone layer (SO). The mixing fractions of 41% LO: 59% SO, 64% LO: 36% SO, 43% LO: 57% SO and 25% LO: 75% SO on the normal days corresponded to groundwaters L-7, L-11, S-3 and S-4, respectively, while the mixing fractions of groundwaters L-7 and L-11 (61% LO: 39% SO and 93% LO: 7% SO, respectively) on rainy days became the majority of groundwater originating from the limestone layer. These indicate that groundwater along the interbedded layer significantly affected the stability of rock slopes by enlarging multi-breaking zones in the layer through calcite dissolution and inducing high water pressure, tension cracks and potential sliding plane along this layer particularly during intense rainfall episodes.

40 citations

Journal ArticleDOI
TL;DR: Zhang et al. as discussed by the authors proposed a concept of phreatic water resource conservation coefficient (PWRCC) for underground coal mining in arid and semi-arid areas.

28 citations