Results 131 to 140 of about 13,620,505 (264)

Stability Control of Multilayer Roof Strata in the Large Mining Height Gob-Side Entry: A Case Study

Applied Sciences
Roof separation, destabilization and collapse of multilayer roof structures are difficult to control in large mining height gob-side entries due to severe mining pressure.
Yong Chen, Ying-Peng Wang, Zheng-Yuan Qin, Feng Yang, Vivek Agarwal   +4 more
semanticscholar   +1 more source

Characteristics of pressure relief gas enrichment zones in overlying strata during high-strength mining based on elliptical-parabolic zone theory

Meitan kexue jishu
With the deepening and high-strength development of coal resource mining, gas issues and safety hazards in the mining process become increasingly prominent.
Haiqing SHUANG, Jiatao ZHANG, Shugang LI, Haifei LIN, Bin ZHOU, Peiyun XU, Pengxiang ZHAO, Peizhen ZHANG   +7 more
doaj   +1 more source

Research on diffusion characteristics of cutting turbulent dust in fully mechanized working face with large mining height

Meikuang Anquan
Taking Sandaogou Coal Mine 85219 fully mechanized coal mining face as an example, the dust migration rules of the front and rear cylinders under the influence of different cutting turbulent wind conditions were numerically simulated, and the effects of downwind and upwind cutting on the diffusion of turbulent dust on the working face were compared. The
Yuliang LIU, Mingjie LYU, Yangming XU, Weihua DUAN   +3 more
openaire   +1 more source

Description of large, well‐preserved Enchodus specimens from the Bearpaw Formation of Alberta, Canada

The Anatomical Record, EarlyView.
Abstract Fishes of the genus Enchodus were abundant and cosmopolitan in the Late Cretaceous, but are primarily known from isolated remains in Canada. Four well‐preserved fish skulls were recovered in recent years from ammolite mines sampling the Bearpaw Formation of Southern Alberta, and are here referred to Enchodus petrosus Cope, 1874.
Luke E. Nelson, Alison M. Murray, Donald B. Brinkman   +2 more
wiley   +1 more source

An Overview of Producer Services in the Mining Industry in South Africa [PDF]

, 2000
The mining industry has been at the heart of South Africa's economy for over 100 years. This working paper explores an aspect of the mining industry that has received little attention - the producer services used in production.
Pogue, Thomas E.
core  

Anatomy and variation in the paraphyletic Mosasaurus lemonnieri assemblage from the Craie phosphatée de ciply, Belgium

The Anatomical Record, EarlyView.
Abstract Nineteenth century excavations of the Ciply‐Malogne Phosphatic Chalk Formation in Hainaut, Belgium, yielded over 50 partial mosasaur skeletons, the majority of which were referred to the species Mosasaurus lemonnieri Dollo, 1889. In the years since, this taxon has experienced a complicated taxonomic history, and its exceptional hypodigm has ...
Henry S. Sharpe, Hallie P. Street‐Sampson, Takuya Konishi, Michael W. Caldwell   +3 more
wiley   +1 more source

Deciphering the Palimpsest: Chronological Uncertainty and the Interpretation of Mining Landscapes at Písečný vrch (Czech Republic)

Archaeological Prospection, EarlyView.
ABSTRACT We investigated the Písečný vrch (Czech Republic), a site exploited for quartz mining in both prehistoric times and the 20th century. Due to their morphological similarity across all mining periods, the differentiation between pits with archaeological potential and recent ones is challenging.
Jan Fišer, Petr Krištuf, Jan Kropáček, Vojtěch Barták, Lenka Starková, Vítězslav Moudrý   +5 more
wiley   +1 more source

Spatio-temporal evolution laws of overburden fractures under the coupling effect of water and rock in large-height fully mechanized coal mining faces

采矿与岩层控制工程学报
The development of fracture zones in the overlying strata due to mining activities has a direct impact on the ground pressure behavior and water gushing & sand collapse disasters at the fully mechanized mining face, and is a fundamental issue restricting
Fangtian WANG, Yunqing ZHANG, Tiankuo TANG, Cun ZHANG, Xu WANG, Yu WU, Yushun ZHOU   +6 more
doaj   +1 more source

Investor Perceptions of Climate Policy: Insights From the US Inflation Reduction Act

Business Strategy and the Environment, EarlyView.
ABSTRACT This paper provides the first event study evidence on how the Inflation Reduction Act's (IRA) dedicated climate provisions reshaped equity valuations in the US carbon‐intensive sectors. Focusing on environmentally sensitive industries (ESI), we analyze cumulative abnormal returns around the four key IRA milestones in 2022–2023.
Laura Ferraro, Arati Kale, Devendra Kale, Franco Ernesto Rubino   +3 more
wiley   +1 more source

Climate Stress Testing on European SME Securitised Loans Under Climate Mitigation Scenarios

Business Strategy and the Environment, EarlyView.
ABSTRACT Assessing the future impact of climate risks on the probability of default (PD) of small and medium enterprises (SMEs) is challenging due to limited disclosure, policy uncertainty and exposure to physical risks. This paper addresses this gap by integrating macroeconomic variables from the Network for Greening the Financial System (NGFS ...
Luca Zanin, Raffaella Calabrese
wiley   +1 more source