Results 71 to 80 of about 1,276 (260)

FLAC3D Simulation of Caving Mechanism and Strata Fracture Response in Underground Mining

Mining
This paper presents an innovative numerical approach to simulating the progressive caving of rock mass in the overburden and floor during longwall mining.
Mahdi Saadat, Mattin Khishvand, Andrew Seccombe   +2 more
doaj   +1 more source

Late Holocene environmental history of Dojran, Macedonia: Investigating the interplay of imperial dynamics and climatic change

Journal of Quaternary Science, EarlyView.
ABSTRACT This study presents a high‐resolution, multi‐proxy reconstruction of environmental and land‐use change from Lake Dojran over historical times (last 2500 years), combining pollen, biomarkers, radiocarbon dating, Ottoman taxation records and other historical data.
Alessia Masi, Lucrezia Masci, Georgios C. Liakopoulos, Monica Bini, Alexander Francke, Ilaria Isola, Carlo Ricotta, Laura Sadori, Alexander Sarantis, Sławomir Sprawski, Jakub Sypiański, Irene Tunno, Cristiano Vignola, Bernd Wagner, Giovanni Zanchetta, Adam Izdebski   +15 more
wiley   +1 more source

Geochronological reconstruction of the Lateglacial deglaciation in the Arve Valley (Northern French Alps)

Journal of Quaternary Science, EarlyView.
ABSTRACT The timing and spatial patterns of glaciers retreat in the Northern French Alps during the Lateglacial (19.0–11.7 ka) remain debated, reflecting discrepancies among available chronological data sets. The complex interactions between major glaciers, such as the Rhône and Arve glaciers to the north and the Isère glacier to the south, represent a
Quentin Portal, Christian Crouzet, Jean‐François Buoncristiani, Julien Carcaillet   +3 more
wiley   +1 more source

Can DNA from wet, temperate soils be used for palaeoecological reconstruction?

Journal of Quaternary Science, EarlyView.
ABSTRACT Sedimentary ancient DNA in well‐dated contexts (sedaDNA) has great potential as a palaeoecological proxy. A few studies have attempted palaeoecological reconstructions using sedaDNA from soil; these studies have been mainly restricted to cold and/or dry soils.
Nick A. Cutler, Doreen Yu‐Tuan Huang, Richard T. Streeter, Andrew J. Dugmore   +3 more
wiley   +1 more source

Simulation and On-Site Detection of the Failure Characteristics of Overlying Strata under the Mining Disturbance of Coal Seams with Thin Bedrock and Thick Alluvium

Sensors
When mining deep coal seams with thin bedrock and thick alluvium, the collapse and fracture of thin bedrock layers may cause geological disasters, such as water inrush and sand inrush of the mining face.
Qunlei Zhang, Jianping Guo, Xiaowei Lu, Kunpeng Ding, Ruifu Yuan, Decai Wang   +5 more
doaj   +1 more source

Beyond Chemical Compliance: A Critical Review Toward Microbiome‐Informed Ecological Exit Criteria for Bioremediated Soils

Land Degradation &Development, EarlyView.
ABSTRACT Chemical compliance remains the usual endpoint for closing contaminated‐soil remediation projects, although it does not establish recovery of soil function or the durability of the post‐treatment state. This critical review examines when microbiological evidence can contribute to ecological closure decisions.
Mariusz Cycoń
wiley   +1 more source

Biomineralization of primary carbonate cements: a new biosignature in the fossil record from the Anisian of Southern Italy

Lethaia, EarlyView., 2021
Biomineralization is a generic term used to indicate biological‐mediated mineral formation. In carbonate mineralization, nucleation of crystals can be: (1) controlled directly by the organisms, like in the skeletal formation of most metazoans; (2) induced by microbial communities, by indirect precipitation mediated by their metabolic activities; or (3)
Adriano Guido, Matteo Sposato, Giuseppe Palladino, Alessandro Vescogni, Domenico Miriello   +4 more
wiley   +1 more source

Study on overburden failure characteristics in deep thick loose seam and thick coal seam mining

Geomatics, Natural Hazards & Risk, 2020
In order to solve the related problems of roof collapse in deep thick loose seam, taking the actual geological conditions of 1302 working face of Zhaolou Coal Mine as the geological background. A mechanical calculation and analysis model for a deep thick
Weitao Liu, Lifu Pang, Baichao Xu, Xi Sun   +3 more
doaj   +1 more source

Petrocosmea wentsaii sp. nov. (Gesneriaceae) from Guizhou, China

Nordic Journal of Botany, EarlyView.
Petrocosmea wentsaii M.Q. Han, Miao.M. Wang & Yan Liu, a new species from Guizhou, China, is described and illustrated. Petrocosmea wentsaii was found on damp walls in a huge limestone cave. It is most similar to Petrocosmea hexiensis S.Z. Zhang & Z.Y. Liu in the conformation of the corolla.
Miao‐Miao Wang, Xiao Wang, Meng‐Qi Han, Yan Liu   +3 more
wiley   +1 more source

Study on development height and permeability laws of water-conducting fracture zone in overlying strata of goaf

Meikuang Anquan
In order to construct an underground water reservoir for storing high-salinity water and achieve zero discharge through the treatment of highly mineralized mine water, it is necessary to accurately evaluate the permeability coefficient of the overlying ...
Peng ZHU, Xu LI, Yaoping CHEN, Dawei KUAI, Qiang GUO   +4 more
doaj   +1 more source