Results 81 to 90 of about 11,011,498 (241)

Research on Top Coal Caving Technique in Steep and Extra-Thick Coal Seam [PDF]

, 2011
Reasonable caving method is an important guarantee of realizing high-yield and high-efficient of the working face. Based on the specific conditions of the 2637 working face in Zhaogezhuang Mine, compared extraction rates under different top coal caving ...
Juguo Zhang, Zhiqiang Zhao, Yang Gao, Zhao, Zhiqiang, Gao, Yang, Zhang, Juguo   +5 more
core   +1 more source

Building Confidence in Hybrid Anatomy Learners

Clinical Anatomy, EarlyView.
ABSTRACT Human Anatomy's challenging content load can often undermine student confidence. We investigated how confidence correlates with academic performance and which confidence building strategies are perceived as impactful on academic performance.
Reivian Berrios Barillas, Rachel Gilbert, Mariano De Leon, Yanshan Wang, Scott Fraundorf   +4 more
wiley   +1 more source

Clinical Functional Assignment of TPMT and NUDT15 Alleles by the Clinical Pharmacogenetics Implementation Consortium Pharmacogene Curation Expert Panel

Clinical Pharmacology &Therapeutics, EarlyView.
The Clinical Pharmacogenetics Implementation Consortium (CPIC) TPMT/NUDT15 Pharmacogene Curation Expert Panel (PCEP) conducted a comprehensive review of clinical, laboratory, and computational evidence to determine the clinical function assignments for TPMT and NUDT15 star alleles.
Bailey M. Tibben, Maud Maillard, Victoria M. Pratt, Ann M. Moyer, Debbie M. Figueroa, Michelle Whirl‐Carrillo, Andrea Gaedigk, Gabriele Stocco, Matthias Schwab, Kelly E. Caudle, Jun J. Yang   +10 more
wiley   +1 more source

Evaluating Vaginal Microbiome Effects on Antiretroviral Exposure in the Female Genital Tract Using Pharmacometric and Machine Learning Approaches

Clinical Pharmacology &Therapeutics, EarlyView.
Antiretroviral pre‐exposure prophylaxis (PrEP) is less effective in women than expected, partly because drug exposure within the female genital tract is variable and may be influenced by the vaginal microbiome. We developed an integrated pharmacometrics and machine learning framework to evaluate associations between vaginal microbiome composition and ...
Diqin Yan, Lindsey B. Collins, Christopher Staley, Flavia Kiweewa Matovu, Pamala Jacobson, Melanie Nicol, Shen Cheng   +6 more
wiley   +1 more source

Research on influence of coal seam thickness on caving characteristics of top-coal in inclined coal seam fully - mechanized caving faces

Meitan kexue jishu
The coal seam at the 2125 fully mechanized top-coal caving face in Hebi Coal Mine No. 6 exhibits unstable occurrence, with a thickness ranging from 0.4 m to 24 m and a dip angle varying between 8° and 35°.
Dongyin LI, Mingjin JIA, Mengguang LI, Hongbin LI, Shen WANG, Song LI   +5 more
doaj   +1 more source

Prediction of the height of caving zone above the undercut in block caving mining method

Rock Mechanics Letters
The block caving is one of the most commonly used methods in underground mining of massive, low/high grades, and deep deposits. As a result of undercutting, caving occurs and propagates toward the upper part of the ore block. It is essential to predict the height of caved ore and its volume based on shape of the caved zone to make an economic decision.
Behnam Alipenhani, Abbas Majdi, Hassan Bakhshandeh Amnieh, Erfan Amini   +3 more
openaire   +1 more source

An optimizing microseismic method for rock burst early warning based on mining production process

Deep Underground Science and Engineering, EarlyView.
A classification early warning method of rock burst based on hourly microseismic data is proposed, which can be combined with the on‐site production process to provide more timely warning. Abstract Microseismic (MS) events have been reported in nearly every coal mining country, which could well lead to rock burst in underground coal mines.
Zepeng Han, Linming Dou, Wu Cai, Mingbo Chi, Guojun Xi, Shuai Chen, Biao Jiao   +6 more
wiley   +1 more source

Study on Roof-Coal Caving Characteristics with Complicated Structure by Fully Mechanized Caving Mining

, 2019
With mining technology and mechanization degree being improving, fully mechanized caving mining technology (FCM) has become a main method for thick coal seam extraction in China.
Lei Li, Zhongguang Sun, Xuelin Yang, Jinhua Chen, Yunpei Liang, Xuelong Li, Kequan Wang   +6 more
core   +1 more source

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source

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