Results 131 to 140 of about 1,717 (280)

Experimental Study on Deformation and Collapse Characteristics of Two Stope Belts Based on Continuous Displacement Monitoring

工程科学与技术, 2019
Similar simulation test is an effective way to study the height of mining overburden caving zone and fracture zone, and accurate monitoring of strata displacement is the key to study the height of the zones.
Qinghe ZHANG, Ke YANG, Liang YUAN, Changrui DUAN   +3 more
doaj  

Boundary Spatial Morphology of Top-Coal Limit Equilibrium Zone in Fully Mechanized Top-Coal Caving Stope in Steeply Dipping Coal Seam

To address the stability control challenges of the “support-surrounding rock” system in fully mechanized top-coal caving faces within steeply dipping coal seams, this study employs an integrated approach combining theoretical analysis and ...
Ding Lang, Yongping Wu, Panshi Xie, Xiaobo Wu   +3 more
core   +1 more source

Towards an ‘absolute’ timing of biostratigraphic and environmental phases from the Saalian late glacial to the Weichselian pleniglacial in central Europe—Insights from a lacustrine succession in Lichtenberg, northern Germany

Boreas, EarlyView.
Palynological records are central to the biostratigraphic subdivision of the Late Pleistocene in central Europe. Yet many interglacial and interstadial phases—such as the Eemian, Brörup and Odderade—remain only poorly constrained in time due to limited numerical dating.
Michael Hein, Thomas Kasper, Alexis Badai Samudra, Martin Theuerkauf, Markus Lothar Fischer, Neda Rahimzadeh, Maria Sekar Proborukmi, Sonja Rigterink, Agnieszka Gruszczyńska, Christian Zeeden, Simon Parfitt, David John Horne, Lucy Roberts, Dustin White, Lisa Brogmus, Hans von Suchodoletz, Tobias Lauer, Marcel Weiss, David Colin Tanner, Brigitte Urban   +19 more
wiley   +1 more source

Modelling of caving and deformation mechanisms of the hangingwall of the Printzsköld oreboby at Malmberget mine

, 2017
Sublevel caving in Malmberget mine results in mining-induced surfacedeformation. One of the currently mined orebodies is the Printzsköldorebody. As mining deepens there is need to assess the behaviour of thecave formed in the subsurface above this ...
Sjöberg, Jonny, Savilahti, Thomas, Umar, Sraj Banda   +2 more
core   +1 more source

The Early Upper Palaeolithic open‐air site of Friedrichsdorf‐Seulberg, Germany, in the context of the northern central European Aurignacian

Boreas, EarlyView.
Our knowledge of the Early Upper Palaeolithic occupation in northern central Europe is very limited, and recent research at the open‐air site of Friedrichsdorf‐Seulberg in Hesse, Germany, provides important new information on the Aurignacian. The site is rather small (26.5 m2) and spatial analysis identified a central hearth with two associated ...
Tilman Böckenförde, Gabriele Russo, Neda Rahimzadeh, Felix Bittmann, Nikolitsa Nikolakopoulou, Thomas Terberger   +5 more
wiley   +1 more source

Submerged geomorphic record of Quaternary palaeoshorelines: terraces and clinothems along a shelf‐edge in the Žirje Archipelago, Adriatic Sea

Boreas, EarlyView.
Numerous studies have shown that during the Quaternary there were substantial fluctuations in sea level in response to glacial–interglacial climate variability, reaching lowstand positions up to 134 m below the present sea level (b.s.l.). These fluctuations have had a strong influence on the morphology of shallow shelf seas, which preserve evidence of ...
Ozren Hasan, Dea Brunović, Natalia Smrkulj, Maria Geraga, Dimitris Christodoulou, Nikolina Ilijanić, George Papatheodorou, Slobodan Miko   +7 more
wiley   +1 more source

Study on evolution law of overburden fracture in fully-mechanized top-coal caving face with large mining height in thick coal seam

Meitan kexue jishu
Fully mechanized top-coal caving mining with large mining height is easy to form strong strata behavior, and the fracture evolution law of overlying strata is very important for safe production of working face.
Hongtao LIU, Zilong LUO, Zijun HAN, Zhou HAN, Xiaogang CHEN, Jiachen PENG   +5 more
doaj   +1 more source

Discrete Element Modelling of Footwall Rock Mass Damage Induced by Sub-Level Caving at the Kiirunavaara Mine

, 2017
The Kiirunavaara mine is one of the largest sub-level-caving (SLC) mines in the world and has been in underground operation for more than 50 years. The mine has been the focus of several case studies over the years. The previous works have either focused
David Saiang, Saiang, David,, Mikael Svartsjaern, Svartsjaern, Mikael,   +3 more
core   +1 more source

A bifacial paradise—The site of Ochtmissen, Germany, and its lithic assemblage in the context of the last glacial (early MIS 4) in the north‐central European Lowland

Boreas, EarlyView.
The Palaeolithic site of Ochtmissen (Lower Saxony, Germany) was excavated in fluvial terrace deposits during the winter of 1993/1994. The current study presents, for the first time, a thorough analysis of the lithic assemblage, encompassing its primary technological and typological characteristics, as well as the type and age of the fluvial deposits ...
Gianpiero Di Maida, Jutta Winsemann, Markus Fuchs, Niklas von Soest, Thomas Terberger   +4 more
wiley   +1 more source

Research on the spontaneous combustion of the goaf at different advancing distances based on the dynamic evolution of porosity

Case Studies in Thermal Engineering
Spontaneous combustion of residual coal in the goaf is one of the main disasters in coal mines. Understanding the law of spontaneous combustion of residual coal can effectively prevent coal mine fires.
Wenbin Zhao, Tingchao Ma, Jinfeng Wang, Houqing Zhang, Guoqing Chen, Zhongqiao Wang, Xiangxiao Chen, Fangshun Liu, Xu Chen   +8 more
doaj   +1 more source