Results 31 to 40 of about 305,148 (261)

Study of evaluation of economic rock-mixed ratio of longwall top-coal caving working face based on entropy weight-extension theory

Meitan kexue jishu
The rock-mixed ratio of top-coal caving mining significantly affects the coal quality and economic benefits. This ratio at longwall top-coal caving (LTCC) faces is jointly determined by multiple factors, including geological conditions, extracting and ...
Shen WANG, Ruixiang LI, Dongyin LI, Peng LYU, Ru FENG, Hongbin LI, Wen WANG   +6 more
doaj   +1 more source

IDENTIFICATION OF A ROBUST LICHEN INDEX FOR THE DECONVOLUTION OF LICHEN AND ROCK MIXTURES USING PATTERN SEARCH ALGORITHM (CASE STUDY: GREENLAND) [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Lichens are the dominant autotrophs of polar and subpolar ecosystems commonly encrust the rock outcrops. Spectral mixing of lichens and bare rock can shift diagnostic spectral features of materials of interest thus leading to misinterpretation and false
S. Salehi, S. Salehi, M. Karami, R. Fensholt   +3 more
doaj   +1 more source

Study on chemical characteristics and evolution law of groundwater in Taigemiao Mining Area

Meitan kexue jishu, 2023
Taigemiao Mining Area is rich in coal resources, but water resources are scarce and the ecological environment is fragile, and the use of hydrogeochemical methods to carry out research on the chemical characteristics and evolution law of groundwater in ...
Haixiang LI, Zhiguo CAO, Lujun WANG, Mingbo CHI, Bowen HU, Suo ZHANG, Aixia ZHOU   +6 more
doaj   +1 more source

Prediction of rock mixed ratio in image-based intelligent control of caving door in longwall top coal caving face part Ⅱ: inside rock mixed ratio of coal flow

Meitan xuebao
The main task of image-based intelligent control of caving door in longwall top coal caving face is to monitor the rock mixed ratio of coal flow by analyzing the image, and then determine the closing time of caving door.
Jiachen WANG, Shengli YANG, Lianghui LI, Xin ZHANG, Yongsheng CHEN, Dongxin HOU   +5 more
doaj   +1 more source

Sr-Nd-Pb-Hf isotope results from ODP Leg 187: Evidence for mantle dynamics of the Australian-Antarctic Discordance and origin of the Indian MORB source [PDF]

, 2002
New high precision PIMMS Hf and Pb isotope data for 14–28 Ma basalts recovered during ODP Leg 187 are compared with zero-age dredge samples from the Australian-Antarctic Discordance (AAD).
Alvarez, Anderson, Arculus, Barling, Ben Othman, Charles Langmuir, Chauvel, Christie, Christie, David M. Christie, Donnelly, Dosso, Fitton, Fitzsimons, Forsyth, Frey, Frey, Galer, Graham, Gurnis, Hamelin, Hanan, Hart, Hemming, Hochstaedter, J. Godfrey Fitton, Julian A. Pearce, Kelly, Kempton, Kempton, Kent, Klein, Klein, Kuo, Lanyon, Lanyon, Mahoney, Mahoney, Mahoney, Mahoney, Marks, Marks, Marsh, Michard, Nowell, Palmer, Pamela D. Kempton, Patchett, Patchett, Pearce, Pearce, Pearce, Pearce, Peate, Plank, Pyle, Pyle, Pyle, Rehkämper, Royer, Russo, Salters, Salters, Sempéré, Smith, Storey, Tiffany L. Barry, Todt, Unrug, Vervoort, Vlastelic, Vogt, Weis, Weissel, Weissel, West, Yang, Zhang   +77 more
core   +2 more sources

Research progress on intelligent coal caving theory and technology

Gong-kuang zidonghua
The longwall top-coal caving technology is an effective method for extracting thick and ultra-thick coal seams, and it has become a hallmark technology in China's coal mining industry.
WANG Jiachen, YANG Shengli, LI Lianghui, ZHANG Jinwang, WEI Weijie   +4 more
doaj   +1 more source

Mechanical evaluation and optimal mixing ratios in co-disposal of phosphate mining tailings and waste rock

Scientific Reports
Abstract Given the complexity of the behavior of mining tailings dams built by the technique of hydraulic embankments and the recurring dam ruptures globally, especially in Brazil, ensuring enhanced safety through advanced disposal techniques becomes crucial.
Gabriel Gomes Silva, Rafael Cerqueira Silva   +1 more
openaire   +3 more sources

Endothelin-1 Drives Epithelial-Mesenchymal Transition In Hypertensive Nephroangiosclerosis [PDF]

, 2016
BACKGROUND: Tubulointerstitial fibrosis, the final outcome of most kidney diseases, involves activation of epithelial mesenchymal transition (EMT). Endothelin‐1 (ET‐1) activates EMT in cancer cells, but it is not known whether it drives EMT in the kidney.
Belloni, Anna S, Buccella, Valentina, CALO', LORENZO, Caroccia, Brasilina, Gioco, Francesca, Guerzoni, Eugenia, GUIDOLIN, DIEGO, Montini, Barbara, Pagnin, Elisa, Petrelli, Lucia, Piazza, Maria, Ravarotto, Verdiana, ROSSI, GIANPAOLO, SECCIA, TERESA MARIA   +13 more
core   +1 more source

Study on the Charge Structure Optimization for Coal–Rock Mixed Blasting and Separate Mining in Open-Pit Mine with High Benches

Applied Sciences
This study systematically analyzes the influence of the charge length-to-diameter ratio and stemming length on the radius and volume of blasting craters in coal and rock blasting crater tests to effectively address the challenge of achieving coal–rock ...
Anjun Jiang, Honglu Fei, Yu Yan, Yanyu Liu, Shijie Bao, Jian Guo   +5 more
doaj   +1 more source

Flood magnitude-frequency and lithologic control on bedrock river incision in post-orogenic terrain [PDF]

, 2006
Mixed bedrock-alluvial rivers - bedrock channels lined with a discontinuous alluvial cover - are key agents in the shaping of mountain belt topography by bedrock fluvial incision.
Annandale, Ashworth, Baker, Baker, Baker, Baker, Baker, Baker, Baldwin, Bathurst, Bathurst, Bathurst, Beaumont, Bierman, Brayshaw, Brierley, Buffington, Buffington, Bureau of Meteorology, Carling, Chin, Church, Cordery, Costa, Dietrich, Emmett, Feldman, Ferguson, Gale, Gasparini, Gibson, Gilbert, Gomez, Grant, Grant, Hack, Hack, Hancock, Hey, Hill, Hovius, Howard, Howard, Howard, Howard, Howard, Inderbitzen, Jackson, Jansen, Jarrett, John D. Jansen, Kieffer, Knighton, Knighton, Komar, Komar, Langbein, Mabbutt, MacQueen, Manning, Martin, Merritts, Miller, Miller, Miller, Molnar, Neef, O'Connor, Parker, Parker, Pazzaglia, Pickup, Pilgrim, Prestegaard, Rana, Raymo, Rhoads, Rice, Schick, Schoklitsch, Schumm, Seidl, Sklar, Sklar, Small, Snyder, Sternberg, Stock, Thompson, Tinkler, Tinkler, Troutman, Tucker, Tucker, van de Graaf, van der Beek, Veevers, Ward, Wende, Whipple, Whipple, Whipple, Whittaker, Wilford, Willet, Williams, Wohl, Wohl, Wohl, Wohl, Wolman, Wolman   +111 more
core   +1 more source