Cemented paste backfill(CPB) is gaining popularity in many underground mines worldwide. Sufficient water is added into CPB to make a flowable material for pipe transportation. Barricades are built near the drawpoints ...Cemented paste backfill(CPB) is gaining popularity in many underground mines worldwide. Sufficient water is added into CPB to make a flowable material for pipe transportation. Barricades are built near the drawpoints to prevent in-rush of the fill slurry. To avoid barricade failures resulting from excessive backfill pressures, backfilling is typically performed with a plug pour followed by a final pour. The interval between the two pours should be shortened or removed to increase mining productivity and avoid pipe clogging. Recently, Li proposed to apply wick drains in backfilled stopes to promote drainage and consolidation. The preliminary simulations by considering an instantaneous filling indicated that the drainage of CPB can be significantly accelerated by using wick drains. Barricade was not considered.Here, some new numerical modellings are presented with more representative filling sequences, stope geometry, and different draining configurations. The results illustrate that the stope can be backfilled continuously by using wick drains.展开更多
目的分析近10年动物辅助干预的研究进展,了解研究热点和发展趋势。方法检索Web of Science核心合集数据库2011年至2021年发表的动物辅助干预相关文献,采用CiteSpace软件对国家/地区、机构、作者、被引期刊、被引文献、关键词进行可视化...目的分析近10年动物辅助干预的研究进展,了解研究热点和发展趋势。方法检索Web of Science核心合集数据库2011年至2021年发表的动物辅助干预相关文献,采用CiteSpace软件对国家/地区、机构、作者、被引期刊、被引文献、关键词进行可视化分析。结果共纳入文献607篇,发文量逐年递增;美国(230篇)、意大利(65篇)、英国(45篇)发文量排名前列;发文最多的机构是美国普渡大学(20篇)。高产作者以Santaniello A(13篇)为代表。关键节点文献主要是系统综述和随机对照试验;动物辅助治疗、辅助犬等为高频关键词,高中心性关键词20个,突现关键词16个。研究热点主要包括阿尔茨海默病、抑郁症、儿童、孤独症等。疾病管理和作业疗法可能是未来研究的趋势。结论动物辅助干预目前主要应用于心理干预,可能会被纳入作业疗法范畴。展开更多
基金the Natural Sciences and Engineering Research Council of Canada (RGPIN)the Institut de recherche Robert-Sauvé en santé et en sécurité du travail (IRSST)the industrial partners of the Research Institute on Mines and the Environment (RIME UQAT-Polytechnique)
文摘Cemented paste backfill(CPB) is gaining popularity in many underground mines worldwide. Sufficient water is added into CPB to make a flowable material for pipe transportation. Barricades are built near the drawpoints to prevent in-rush of the fill slurry. To avoid barricade failures resulting from excessive backfill pressures, backfilling is typically performed with a plug pour followed by a final pour. The interval between the two pours should be shortened or removed to increase mining productivity and avoid pipe clogging. Recently, Li proposed to apply wick drains in backfilled stopes to promote drainage and consolidation. The preliminary simulations by considering an instantaneous filling indicated that the drainage of CPB can be significantly accelerated by using wick drains. Barricade was not considered.Here, some new numerical modellings are presented with more representative filling sequences, stope geometry, and different draining configurations. The results illustrate that the stope can be backfilled continuously by using wick drains.
文摘目的分析近10年动物辅助干预的研究进展,了解研究热点和发展趋势。方法检索Web of Science核心合集数据库2011年至2021年发表的动物辅助干预相关文献,采用CiteSpace软件对国家/地区、机构、作者、被引期刊、被引文献、关键词进行可视化分析。结果共纳入文献607篇,发文量逐年递增;美国(230篇)、意大利(65篇)、英国(45篇)发文量排名前列;发文最多的机构是美国普渡大学(20篇)。高产作者以Santaniello A(13篇)为代表。关键节点文献主要是系统综述和随机对照试验;动物辅助治疗、辅助犬等为高频关键词,高中心性关键词20个,突现关键词16个。研究热点主要包括阿尔茨海默病、抑郁症、儿童、孤独症等。疾病管理和作业疗法可能是未来研究的趋势。结论动物辅助干预目前主要应用于心理干预,可能会被纳入作业疗法范畴。
