Results 31 to 40 of about 6,443,450 (298)

Comparative Study on Thermodynamic and Geochemical Characteristics between Cemented and Clotted Parts of Thrombolite

Crystals, 2020
Carbonate rocks are widely distributed in nature and are one of the main reservoir rocks for oil and gas. Microbes play an important role in the formation of carbonate rocks.
Dingxiang Zhuang, Yan Guo, Song Chen
doaj   +1 more source

Plugging efficiency of pouring aggregates through multiple boreholes into an inundated tunnel to prevent groundwater inrush disasters

Geoenvironmental Disasters, 2022
This paper presents an experimental investigation of the plugging efficiency of aggregate pouring through multiple boreholes under flowing water conditions into an inundated mine tunnel.
Shuang Hui, Wanghua Sui, Gailing Zhang, Jiaxing Chen, Shibo Yu   +4 more
doaj   +1 more source

Study on the Long-Term Performance and Efficiency of Single-Well Circulation Coupled Groundwater Heat Pump System Based on Field Test

Frontiers in Earth Science, 2021
Although buildings are often heated and cooled by single-well circulation coupled groundwater heat pump systems, few studies have evaluated the long-term performance of these systems.
Ke Zhu, Ke Zhu, Yifan Zeng, Yifan Zeng, Qiang Wu, Qiang Wu, Shengheng Xu, Shengheng Xu, Kun Tu, Kun Tu, Xiaoxiu Liu, Xiaoxiu Liu   +11 more
doaj   +1 more source

Active Treatment of Contaminants of Emerging Concern in Cold Mine Water Using Advanced Oxidation and Membrane-Related Processes: A Review

Minerals, 2021
Responsible use and effective treatment of mine water are prerequisites of sustainable mining. The behavior of contaminants in mine water evolves in relation to the metastable characteristics of some species, changes related to the mine life cycle, and ...
Sébastien Ryskie, C. Neculita, E. Rosa, L. Coudert, P. Couture   +4 more
semanticscholar   +1 more source

Geochemical source analysis of rock cuttings based on major elemental geochemistry

Meitan xuebao
In recent years, shale logging has played a crucial role in the grouting reinforcement engineering of the floor limestone strata in “North China-type”coalfields.
Herong GUI, Jun LI, Yongqing CHEN, Hao YU, Hao WANG, Shuang YE, Daxing CHEN, Zhan LIANG, Yang HU, Yan GUO, Jiying XU   +10 more
doaj   +1 more source

Analytical modeling of mine water rebound: Three case studies in closed hard-coal mines in Germany

Mining of Mineral Deposits, 2021
Purpose.In this paper we present and validate an analytical model of water inflow and rising level in a flooded mine and examine the model robustness and sensitivity to variations of input data considering the examples of three closed hard-coal mines in ...
D. Rudakov, S. Westermann
semanticscholar   +1 more source

Aquatic Ecosystems of the Anthropocene: Limnology and Microbial Ecology of Mine Pit Lakes

Microorganisms, 2021
Mine pit lakes (‘pit lakes’) are new aquatic ecosystems of the Anthropocene. Potentially hundreds of meters deep, these lakes are prominent in the landscape and in the public consciousness.
Melanie L. Blanchette, Mark A. Lund
doaj   +1 more source

Overburden failure characteristics and fracture evolution rule under repeated mining with multiple key strata control

Scientific Reports
To master the overburden structure failure and fracture evolution law under multi-key stratum control during repeated mining in coal seams, this study takes the superimposed mining faces of 6# and 7# coal seams in Xinjiang mining area as the research ...
Sun Chaoshang, Shi Chaoyang, Zhu Zhiming, Lin Haixiao, Li Zhenhua, Du Feng, Cao Zhengzheng, Lu Pengtao, Liu Lin   +8 more
doaj   +1 more source

Mapping the evolution of mitochondrial complex I through structural variation

FEBS Letters, EarlyView.
Respiratory complex I (CI) is crucial for bioenergetic metabolism in many prokaryotes and eukaryotes. It is composed of a conserved set of core subunits and additional accessory subunits that vary depending on the organism. Here, we categorize CI subunits from available structures to map the evolution of CI across eukaryotes. Respiratory complex I (CI)
Dong‐Woo Shin, Tingting Chen, James A. Letts   +2 more
wiley   +1 more source

Determination method of rational position for working face entries in coordinated mining of section coal pillars and lower sub-layer

Scientific Reports
For the study of the layout of the roadway in the coal pillar and floor strata co-mining working face at the Zhaogu No.2 mine, a mechanical model of the segmental coal pillar within the working face was established through theoretical calculations.
Xinlei Li, Hengheng Huan, Haixiao Lin, Zhenhua Li, Feng Du, Zhengzheng Cao, Xuan Fan, Hao Ren   +7 more
doaj   +1 more source