Results 111 to 120 of about 140,971 (281)

Study on Characteristics of Front Abutment Pressure and Rational Stop-Mining Coal Pillar Width in Large Height Working Face

Processes
The width of a stop-mining coal pillar is of great significance to the stability of the surrounding rock of the main roadway and the safety of production in the mine. This paper focuses on the west panel of Sihe Coal Mine as the engineering background, analyzes the evolution characteristics of front abutment pressure in the mining area under conditions
Wei Yu, Gangwei Fan, Dongsheng Zhang, Wenhao Guo, Wenhui Zhang, Shizhong Zhang, Zhanglei Fan   +6 more
openaire   +1 more source

An Evaluation of Mortality Rates and Their Determinants in a Cohort of Former Asbestos Miners in South Africa

American Journal of Industrial Medicine, EarlyView.
ABSTRACT Background A causal association between occupational asbestos exposure and lung disease, including pneumoconiosis and mesothelioma, is well established. Elevated mortality among former asbestos miners is expected. However, large‐scale South African studies examining all‐cause mortality in this population are lacking.
Yumna Williams‐Mohamed, Rodney Ehrlich, Jim teWaterNaude, Shahieda Adams   +3 more
wiley   +1 more source

Pressure law and roof control of near shallow buried super large mining height working face

Meitan kexue jishu
Aiming at the roof control problem of super-large mining height in near-shallow buried thick unconsolidated layers represented by Yushen Mining Area, the theoretical analysis, numerical simulation and field measurement are used to analyze the pressure ...
Xiaogang LIU, Zhen ZHANG, Qianjin LIU, Jianchao REN, Maofu LIU, Xingyu LIN, Rongshan MA   +6 more
doaj   +1 more source

Review of geomechanical problems of accumulation and reduction of mining industry wastes, and ways of their solution [PDF]

, 2018
Purpose. The identification of geomechanical problems of mining industry wastes accumulation and substantiation of the ways for their solution with the possibility of processing the watery technogenic feedstock by fine classification with dewatering ...
Babii, K, Bubnova, O, Chetveryk, M, Moldabaev, S, Shevchenko, O   +4 more
core   +1 more source

The Cost of the National Disability Insurance Scheme: Australia's Print‐Media Discourse

Australian Journal of Social Issues, EarlyView.
ABSTRACT This paper examines the way that Australian newspapers have framed the cost of the National Disability Insurance Scheme (NDIS). Introduced in 2013, the NDIS represented a major change in Australia's disability support policy, moving for the first time to a nationwide universal insurance model.
Meera Chinnappa, Jennifer Smith‐Merry, Kuo‐yi Jade Chang   +2 more
wiley   +1 more source

Research on spontaneous combustion 'three zones' in goaf of fully mechanized working face with large mining height

Gong-kuang zidonghua, 2019
In view of goaf spontaneous combustion prevention of 12401 fully mechanized working face with large mining height in Shangwan Coal Mine, CO is determined as prediction index gas of coal spontaneous combustion and C2H4 is used as auxiliary index gas to master coal spontaneous combustion through temperature programmed oxidation experiment. Gas in goaf is
QU Shijia, AN Shigang, WU Fusheng, LI Peng   +3 more
openaire   +1 more source

Quantitative Assessment of Bed-Separation Dynamic Development Caused by Inclined Coal Seam Longwall Mining

Mathematics
Coal mining under the Quaternary thick loose layer affects key strata breakage, Bed-separations development, ground subsidence, and other studies. This paper presents a method for solving the deflection of a large-deflection inclined thin plate under a ...
Yaxing Li, Keming Yang, Xiangping Wei, Wei Tang, Kegui Jiang   +4 more
doaj   +1 more source

Prediction of Emerging Technologies Based on Analysis of the U.S. Patent Citation Network

, 2013
The network of patents connected by citations is an evolving graph, which provides a representation of the innovation process. A patent citing another implies that the cited patent reflects a piece of previously existing knowledge that the citing patent ...
A. Hargadon, A. Jaffe, A. Pyka, A. Sood, A. Usher, A. Verbeek, A. Vespignani, B. Milman, C. Chen, C. Sternitzke, C. Weng, D. Harhoff, E. Duguet, E. Garfield, E. Garfield, F. Murray, F. Narin, G. McMillanm, G. Palla, H. Moed, H. Small, H. Small, J. Alcacer, J. Hagedoorn, J. Lanjouw, J. Podolny, J. Podolny, J. Schumpeter, J. Ward, Jan Tobochnik, K. Debackere, K. Lai, K. OuYang, K. Strandburg, K. Strandburg, Katherine Strandburg, Kinga Makovi, L. Fleming, L. Fleming, L. Fleming, L. Leydesdorff, László Zalányi, M. Girvan, M. Meyer, M. Meyer, M. Mogee, M. Mogee, M. Mogee, M. Newman, M. Newman, M. Wallace, M. Weitzman, N. Shibata, N. Shibata, N. Shibata, O. Sorenson, P. Almeida, P. Pons, P. Saviotti, P. Saviotti, P. Saviotti, P. Érdi, P.C. Lee, Péter Volf, Péter Érdi, R. Fontana, R. Henderson, R. Kostoff, R. Kostoff, R. Kostoff, R. Tijssen, S. Chang, Y. Kajikawa, Y. Kajikawa, Z. Huang, Z. Huang, Zoltán Somogyvári   +76 more
core   +1 more source

Inter‐microscope comparability of dental microwear texture data obtained from different optical profilometers: Part II Deriving instrument‐specific correction equations for meta‐analyses using published data

The Anatomical Record, EarlyView.
Abstract Dental microwear texture analysis (DMTA) has emerged as a valuable method for investigating the feeding ecology of vertebrates. Over the past decade, three‐dimensional topographic data from microscopic regions of tooth surfaces have been collected, and surface texture parameters have been published for both extant and fossil species.
Mugino O. Kubo, T. Kubo, Ellen Schulz‐Kornas, T. M. Kaiser, Daniela E. Winkler   +4 more
wiley   +1 more source

Adaptive intelligent coupling control of hydraulic support and working face system for 6−10 m super high mining in thick coal seams

Meitan kexue jishu
The reserves and production of thick coal seams account for half of the total reserves and production of raw coal in China. By combing the history of thick coal seam mining, we summarize the technology and equipment development practice of thick coal ...
Huijun HAN, Guofa WANG, Yongxiang XU, Jinhu ZHANG, Sheng LEI, Yanpeng LI   +5 more
doaj   +1 more source