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| 1 | Groundwater monitoring of an open-pit limestone quarry:Water-rock interaction and mixing estimation within the rock layers by geochemical and statistical analyses显示文摘Water-rock interaction and groundwater mixing are important phenomena in understanding hydrogeological systems and the stability of rock slopes especially those consisting largely of moderately watersoluble minerals like calcite. In this study, the hydrogeological and geochemical evolutions of groundwater in a limestone quarry composed of three strata: limestone layer(covering), interbedded layer under the covering layer, and slaty greenstone layer(basement) were investigated. Water-rock interaction in the open-pit limestone quarry was evaluated using PHREEQC, while hierarchical cluster analysis(HCA)and principal component analysis(PCA) were used to classify and identify water sources responsible for possible groundwater mixing within rock layers. In addition, Geochemist's Workbench was applied to estimate the mixing fractions to clarify sensitive zones that may affect rock slope stability. The results showed that the changes in Ca2+and HCO3àconcentrations of several groundwater samples along the interbedded layer could be attributed to mixing groundwater from the limestone layer and that from slaty greenstone layer. Based on the HCA and PCA results, groundwaters were classified into several types depending on their origin:(1) groundwater from the limestone layer(LO),(2) mixed groundwater flowing along the interbedded layer(e.g., groundwater samples L-7, L-11, S-3 and S-4), and(3) groundwater originating from the slaty greenstone layer(SO). The mixing fractions of 41% LO: 59% SO, 64% LO: 36% SO, 43%LO: 57% SOand 25% LO: 75% SOon the normal days corresponded to groundwaters L-7, L-11, S-3 and S-4,respectively, while the mixing fractions of groundwaters L-7 and L-11(61% LO: 39% SOand 93% LO: 7% SO,respectively) on rainy days became the majority of groundwater originating from the limestone layer.These indicate that groundwater along the interbedded layer significantly affected the stability of rock slopes by enlarging multi-breaking zones in the layer through calcite dissolution and inducing high water pressure, tension cracks and potential sliding plane along this layer particularly during intense rainfall episodes. | Khy Eam Eang Toshifumi Igarashi Megumi Kondo Tsurugi Nakatani Carlito Baltazar Tabelin Ryota Fujinaga | 2018 | International Journal of Mining Science and Technology2018，28，6： | 6 |
| 2 | Applying support vector machines to predict building energy consumption in tropical region 显示文摘 | Bing Dong Cheng Cao Siew Eang Lee | 2005 | Energy and Buildings2005，，37： | 1 |
| 3 | Building energy efficiency labeling programme in Singapore显示文摘 | Siew Eang Lee Priyadarsini Rajagopalan | 2008 | Energy Policy2008，，10： | 1 |
| 4 | Conducting Polymer/gold Nanoparticle Hybrid Materials: A Step Toward Electroactive Plasmonic Devices显示文摘 | Leroux Y Eang E Fave C | 2007 | Electrochemistry Communications2007，9，： | 1 |
| 5 | Applying support vector machines to predict building energy consumption in tropical region显示文摘 | Bing Dong Cheng Cao Siew Eang Lee | 2005 | Energy and Buildings2005，，37： | 1 |
| 6 | Inactivation of voltage-gated K+ channels显示文摘 | Morales JM Eang S | 1998 | Circ Res1998，20，： | 1 |
| 7 | Benchmarking energy use and greenhouse gas emissions in Singapore's ho- tel industry显示文摘 | Wu X C Priyadarsini R Eang L S | 2010 | Energy Policy2010，38，8： | 1 |
| 8 | Decreasing seropravelencc of Hell cobacter pylori infection during 1993-2003 in Guangzhou, southern China显示文摘 | Chen J Bu XL Eang QY | 2007 | Helicobacter2007，12，： | 1 |
| 9 | Magnetic resonance imaging of single SPIO labelled mesenchymal stem ceils at 3 Tesla显示文摘 | Peldschus K Kaul M Eange C | 2007 | Rofo2007，179，5： | 1 |
| 10 | Cellular NAD depletion and decline of SIRT1 activity play critical roles in PARP-1- mediated acute epileptic neuronal death in vitro 显示文摘 | WANG S EANG X LIN Y | 2013 | Brain Res2013，1535，： | 1 |
| 11 | Intracoronary verapamil for reversal of no-reflow during coronary angioplasty for acute myocardial infarction显示文摘 | Wemer GS Eang K Kuehnert H | 2002 | Catheter Cardiovasc Interv2002，57，： | 1 |
| 12 | Benchmarking energy use and greenhouse gas emissions in Singapore’s hotel industry显示文摘 | Wu Xuchao Rajagopalan Priyadarsini Lee Siew Eang | 2010 | Energy Policy2010，，8： | 1 |
| 13 | Event-related brain potentials elicited by a number discrimination task显示文摘 | Kong J Eang Y Zhang W | 2000 | Neuroreport2000，11，： | 1 |
| 14 | An investigation of community noise in high-rise residential environments显示文摘 | Alam S M Eang L S Tan A | 2010 | Journal of the Acoustical Society of America2010，127，6： | 1 |
| 15 | Mechanisms and significance of eryptosis显示文摘 | Eang F Lang KS Lang PA | 2006 | Antioxid Redox Signal2006，8，78： | 1 |
| 16 | A study on energy performance of hotel buildings in Singapore 显示文摘 | Priyadarsini R Wu Xuchao Lee Siew Eang | 2009 | Energy and Buildings2009，41，： | 1 |
| 17 | Chemical, structural, and thermal characterizations of alkali-soluble lignins and henfieellu- loses,and cellulose from maize stems, rye straw, and rice straw 显示文摘 | XIAO Bo SUN X F SUN Run- eang | 2001 | Polymer Degradation and Stability2001，74，2： | 1 |
| 18 | Applying Support Vector Machines to Predict Building Energy Consumption in Tropical Region显示文摘 | Bing Dong Cheng Cao Siew Eang Lee | 2005 | Energy and Buildings2005，5，： | 1 |
| 19 | Health-system strengthening and tuberculosis control显示文摘 | Rifat Atun Diana EC Weil Mao Tan Eang David Mwakyusa | 2010 | The Lancet . 2010 (9732)2010，，9732： | 1 |
| 20 | Health-system strengthening and tuberculosis control显示文摘 | Atun R Weil D E C Tan Eang M | 2010 | The Lancet2010，375，9732： | 1 |
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