Results 91 to 100 of about 1,717 (280)

Research of height of water flowing fractured zone of overburden strata in fully-mechanized top-coal caving

Gong-kuang zidonghua, 2015
In order to provide theoretical basis of roof water disaster prevention of No.3 coal seam in a working face after fully-mechanized top-coal caving, empirical formulas in Regulations of building, water, railway and leaving coal pillar and mining pressed ...
ZHANG Hui, ZHU Shuyun, LI Xiuhan, LI Tao, MENG Fanzhen   +4 more
doaj   +1 more source

Laser caving. Rapid progress in an advanced technology

, 2022
S.293-301Thermal stock removal by laser caving adds an utmost flexible process to production technologies for the manufacture of complex free-form surfaces.
Petring, D., Beyer, E., Eberl, G., Zefferer, H.   +3 more
core  

Research on the Height of the Water-Conducting Fracture Zone in Fully Mechanized Top Coal Caving Face under Combined-Strata Structure

, 2022
In order to study the development height of the water-conducting fracture zone in a fully mechanized top coal caving face. The E2311 working face of Gaohe Coal Mine was chosen as the research object, and the combined-strata structure and the rock layer ...
Keke Hou, Yi Luo, Yinfeng Tang, Donghai Jiang, Wanpeng Huang, Jiangwei Liu   +5 more
core   +1 more source

Epistemic diversity and the politics of knowledge in plant disease management: Insights from the Xylella fastidiosa epidemic in southern Italy

PLANTS, PEOPLE, PLANET, EarlyView.
Xylella fastidiosa is a major plant pathogen affecting crops such as grapes, citrus, almonds, and olives, with potentially severe consequences for agricultural production and rural livelihoods worldwide. This paper examines the conflict around the management of the X. fastidiosa outbreak affecting olive trees in southern Italy.
Fabio Gatti, David Ludwig, Phil Macnaghten   +2 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

A Hero's Journey to Systemic Change: Developing Expertise in Agricultural Development

Sustainable Development, EarlyView.
ABSTRACT Experts in rural development and agrarian change wield considerable influence over programme design and delivery, directing resources and shaping trajectories towards the Sustainable Development Goals (SDGs). Yet the pathways through which such expertise develops remain under‐examined. This study examines the journey to expertise among experts
Kirt Hainzer, Caitlin Finlayson, Nicholas Harrigan, Andrew McGregor, Katharine McKinnon, Van Touch, Ariane Utomo, Brian R. Cook   +7 more
wiley   +1 more source

Control of rock burst during deep tunnel blasting excavation based on energy release process optimizing

Rock Mechanics Bulletin
Blasting is widely used in hard rock tunnel excavation but often deteriorates the mechanical properties of the rock mass, forming a disturbance zone associated with energy evolution in the surrounding rock.
Sheng Luo, Qian Yuan, Dong Zhihong, Zhou Liming, Zhou Chunhua, Yang Zhaowei, Yan Peng   +6 more
doaj   +1 more source

Cave Sediments from Postojnska–Planinska Cave System (Slovenia): Evidence of Multi-Phase Evolution in Epiphreatic Zone

Acta Carsologica, 2008
The Postojnska jama–Planinska jama cave system and number of smaller adjacent caves are developed in the Postojnski kras. These caves are located between two dextral strike-slip fault zones oriented in the Dinaric direction. The caves contain lith­ologically diversified cave fill, ranging from speleothems to allo­genic fluvial sediments.
Nadja Zupan Hajna, Petr Pruner, Andrej Mihevc, Petr Schnabl, Pavel Bosák   +4 more
openaire   +2 more sources

Impact of type of the roof rocks on location and range of endogenous fires particular hazard zone by in goaf with caving

, 2018
Hazard of endogenous fires is one of the basic and common presented occupational safety hazards in coal mine in Poland and in the world. This hazard means possibility of coal self-ignition as the result of its self-heating process in mining heading or ...
Brodny Jarosław, Jarosław Brodny, Magdalena Tutak, Tutak Magdalena   +3 more
core   +1 more source

Gravity flow characterization of fine granular material for Block Caving [PDF]

, 2019
© 2018 Elsevier Ltd Block and Panel Caving are based on the action of gravity for ore breakage and transport, so that material reaches the drawpoint through gravity flow.
Castro, Raúl L., Palma, Sergio, Sánchez, Vanessa   +2 more
core   +1 more source