Results 21 to 30 of about 1,674,066 (285)

Localized Sulfide Oxidation Limited by Oxygen Supply in a Full-Scale Waste-Rock Pile

Vadose Zone Journal, 2018
Open-pit mines produce large amounts of waste rock that is placed on-site, often in tall, mixed-composition piles. These waste-rock piles pose environmental risks because their weathering (i.e., sulfide oxidation) may generate acidic and metal-laden ...
Bas Vriens, Mélanie St. Arnault, Laura Laurenzi, Leslie Smith, K. Ulrich Mayer, Roger D. Beckie   +5 more
doaj   +1 more source

X-ray fluorescent study of the chemical composition of samples of rock dump

Технічна інженерія, 2020
The article provided an X-ray fluorescence study of the chemical composition of 2 rock samples taken from a rock dump using a bench-top X-ray fluorescence analyzer (XFA) – ElvaX Plus spectrometer.
I.I. Chobotko, S.V. Tynyna
doaj   +1 more source

Caracterização e classificação de resíduo sólido "pó de rocha granítica" gerado na indústria de rochas ornamentais Characterization and classification of granitic rock powder solid waste produced by ornamental rock industry

Química Nova, 2008
The ornamental rock industry generates huge amounts of wastes during the process of extraction and sawing of rock blocks. The ornamental rock powder waste is a non-biodegradable material, which represents the increase in environmental problem.
João Paulo Vargas Tavares Manhães, José Nilson França de Holanda   +1 more
doaj   +1 more source

Managing the waste rock storage design — can we build a waste rock dump that works? [PDF]

Proceedings of the International Conference on Mine Closure, 2016
For a waste rock dump to be managed both during operations and at closure, a thorough understanding of the composition of the waste is an important requirement. A comprehensive block model should be prepared, with an appropriate materials management and placement plan developed in conjunction with the mining schedule.
Rebecca Barritt, Peter Scott, Ian Taylor
openaire   +1 more source

Muti-scale analysis of solidification/stabilization (S/S) of Pb-contaminated dredged sediment using nano-SiO2 modified cement

Journal of Rock Mechanics and Geotechnical Engineering
The remediation of lead-contaminated dredged sediments (LDS) presents significant environmental challenges. This study investigates the solidification/stabilization (S/S) mechanisms of ordinary Portland cement (OPC) modified with nano-silica (NS) across ...
Wei Zhang, Lei Lang, Zhen Qi, Yao-Yi Wang, Qiang Xue, Jiang-Shan Li   +5 more
doaj   +1 more source

Multi-scale interfacial mechanisms of Pb immobilization in contaminated soil using phosphoric acid-activated coal gangue-electrolytic manganese residue geopolymers

Journal of Rock Mechanics and Geotechnical Engineering
The accumulation of contaminated soils and solid waste stockpiles has led to significant resource wastage and environmental pollution. This study investigates a novel solidification/stabilization (S/S) curing agent, named ECPG, synthesized from ...
Wei Zhang, Lei Lang, Zhen Qi, Ping Wang, Qiang Xue, Fangqin Cheng, Jiangshan Li   +6 more
doaj   +1 more source

Effect of Cyclic Lateral Loading on the Compaction Behaviour of Waste Rock Backfill Materials in Coal Mines

Energies, 2018
Crushed waste rock (CWR) can be used as backfill for goafs allowing disposal of solid waste and control of surface subsidence. Waste rocks for backfilling (WRBs) have a certain density before use if cyclic lateral loads are applied to CWRs, therefore, by
Meng Li, Jixiong Zhang, Baifu An, Deon M. Germain, Qianqian Xu   +4 more
doaj   +1 more source

Anisotropic thermal properties of an argillaceous rock under elevated temperatures and external load conditions

Case Studies in Thermal Engineering, 2023
The design and long-term safety of geological repositories for high-level radioactive waste (HLW) are dependent on the precise determination of the thermophysical parameters of mudstone.
Hongdan Yu, Chen Lu, Wei Liu, Weizhong Chen, Honghui Li, Jiawei Huang   +5 more
doaj   +1 more source

Application of biophosphates in geo-environmental engineering: An overview

Biogeotechnics
Geo-environmental engineering is concerned with the contamination remediation, soil reinforcement, and ecological sustainability of problematic soil matrix, including landfilled soils, contaminated soils, sludges, and solid wastes.
Jiangshan Li, Lijun Han, Qiang Xue
doaj   +1 more source

A Novel Modified Petroresin Particle (MPRP) With Enhanced Oil–Water Selectivity for Cold Production in Heavy Oil Reservoirs

Advanced Functional Materials, EarlyView.
A novel oil–water selective conformance control agent, MPRP, is prepared via hydrophilic grafting and mechanical granulation. MPRP uniformly disperses in water, cohesively expands upon aging, and readily dissolves in the oil phase. During conformance control, it selectively aggregates in water channeling pathways to form effective plugs without ...
Guang Zhao, Dongfang Lv, Chang Liu, Changxu Wu, Yifei Liu, Caili Dai, Huazhou Li   +6 more
wiley   +1 more source