Results 21 to 30 of about 840 (126)
Investigation of physicochemical and triaxial compressive properties of conglomerate in acidic leachate [PDF]
The seepage effect of leaching solution in the process of in-situ leaching mining may lead to the deterioration of the mechanical properties of the aquifuge, and affect the safety of coal uranium co-mining.
Chen LI +4 more
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, 2015 Author name used in this publication: 唐秋华Author name used in this publication: 刘保华Author name used in this publication: 陈永奇Author name used in this publication: 周兴华Author name used in this publication: 丁继胜Title in Traditional Chinese ...
Chen, YQ +4 more
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Effect of Reforestation Tree Species on the Distribution and Stability of Purple Soil Aggregates [PDF]
[Objective] Afforestation following the Grain for Green initiative is a crucial measure to improve soil structure and reduce soil erosion. Understanding the mechanisms of the effects of afforestation tree species on the formation of soil aggregates can ...
HAN Guangzhong +4 more
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, 2013 《关于华南东南亚民族考古的几个问题》是我给厦门大学考古专业硕士生上课时的几段师生对话,内容涉及到华南至东南亚这一跨界区域考古研究的理念、方法、内容、课题等,经硕士生吴梦洋、朱芝兰、马天行等整理后,似自成一章,不妨借《南方文物》一角刊出,供学界进一步批评 ...
吴梦洋, 朱芝兰, 马天行
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THE GRÂNDOLA’S NEW LIBRARY AND MUNICIPAL ARCHIVE IN PORTUGAL [PDF]
, 2021 Apresentação do projecto da Biblioteca Municipal de ...
Domingos, Pedro +2 more
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Study on the activity of the Cuona-Woka Fault Zone, Qinghai-Tibet Plateau, and geological safety risks and prevention methods [PDF]
Objective The Plateau Railway, constructed along the Yarlung Zangbo suture zone on the Qinghai-Tibet Plateau, crosses the active Cuona-Woka Fault Zone. Coseismic surface rupture caused by the active fault leads to engineering breaks, tunnel deformation,
GUO Changbao +7 more
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Shuitu Baochi Xuebao, 2002 土壤水分有效性的高低是制约石渣土生产能力的关键因素之一。对丹江口库区郧县石渣土 3种不同土石比土壤水分有效性的研究表明 :土壤水分有效性与土壤中的土 (2 mm)比关系密切。土壤蒸发、持水、导水和供水能力均与土壤中的土石比的大小有关。 3种土壤的持水能力 ,以石砾含量较少、质地较粘的土壤最强 ,以石砾含量较多、质地为壤质的土壤最低。而土壤水分蒸发能力与砾石含量呈负相关 ,土壤水分扩散率则与砾石含量呈正相关。适中土石比的土壤可提高入渗性能 ,减少蒸发量 ,提高供水性能。
吕国安 蔡崇法 等
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Shiyou jixie, 2014 为提高水平井裸眼长井段砾石充填密实效果，解决水平井筛管的堵塞问题，开发了水平井分段砾石充填技术。介绍了水平井裸眼分段砾石充填管柱、主要砾石充填工具——新型砾石充填复合防砂筛管、充填封隔器和充填洗井总成的结构及工作原理，阐述了水平井分段砾石充填技术在胜利油田单56-平23井的应用情况。应用结果表明，水平井分段砾石充填技术充填均匀可靠，效果理想，可避免长井段充填时因砂沉积在某一段而无法继续填砂的风险，有效提高了水平井裸眼长井段砾石充填密实程度，是长水平段水平井防砂技术的发展趋势。
马明新
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Shuitu Baochi Xuebao, 2023 随着经济社会的高速发展以及工程建设项目的快速递增,大量生产建设项目扰动地表并破坏原地貌植被,大范围且不平衡的挖填活动使得多余的土石混合堆积,尤其在山区工程建设形成的多余土石混合介质,堆积在沟道和河道上游及边坡,在强降雨条件下易发生严重水土流失,甚至造成滑坡、泥石流等灾害。以人为重塑工程堆积体为研究对象(坡度25°),通过模拟降雨试验,开展极端降雨条件下(降雨强度为2.5 mm/min)不同坡长(3,5,6.5,12 m)及砾石质量分数(0,10%,20%,30 ...
李魁, 王文龙, 李建明
doaj
Activity of the Mianzishan-Qingshuiying fault in the southeast margin of the Yinchuan basin [PDF]
Studying the tectonic activity characteristics of the Yinchuan basin is of great significance for understanding the interaction among the three major blocks of Qinghai Tibet, Ordos and Alxa.
Chao Liu +5 more
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