Grouting is a major method used to prevent water and mud inrush in tunnels and underground engineering. In this paper, the current situation of control and prevention of water and mud inrush is summarized and recent a...Grouting is a major method used to prevent water and mud inrush in tunnels and underground engineering. In this paper, the current situation of control and prevention of water and mud inrush is summarized and recent advances in relevant theories, grout/equipment, and critical techniques are introduced. The time-variant equations of grout viscosity at different volumetric ratios were obtained based on the constitutive relation of typical fast curing grouts. A large-scale dynamic grouting model testing system （4000 mm × 2000 mm × 5 mm） was developed, and the diffusions of cement and fast curing grouts in dynamic water grouting were investigated. The results reveal that the diffusions of cement grouts and fast curing grouts are U-shaped and asymmetric elliptical, respectively. A multi-parameter real-time monitoring system （＆#981; = 1.5 m, h = 1.2 m） was developed for the grouting process to study the diffusion and reinforcement mechanism of grouting in water-rich faulted zone. A high early strength cream-type reinforcing/plugging grout, a high permeability nano-scale silica gel grout, and a high-expansion filling grout were proposed for the control of water hazards in weak water-rich faulted zone rocks, water inrush in karst passages, and micro-crack water inrush, respectively. Complement technologies and equipment for industrial applications were also proposed. Additionally, a novel full-life periodic dynamic water grouting with the critical grouting borehole as the core was proposed. The key techniques for the control of water inrush in water-rich faulted zone, jointed fissures and karst passages, and micro-crack water inrush were developed.展开更多
为深入了解黄脊竹蝗的研究动态和热点,本文利用中国知网、万方数据和维普中文期刊服务平台、CAB abstracts和Web of science^(TM)5个数据库,采用Vosviewer软件对黄脊竹蝗的研究进行了可视化分析。结果表明,关于黄脊竹蝗的文献最早发表于...为深入了解黄脊竹蝗的研究动态和热点,本文利用中国知网、万方数据和维普中文期刊服务平台、CAB abstracts和Web of science^(TM)5个数据库,采用Vosviewer软件对黄脊竹蝗的研究进行了可视化分析。结果表明,关于黄脊竹蝗的文献最早发表于1935年,近10年是相关研究发文量的高峰期。黄脊竹蝗相关文献最主要的媒介是学术期刊,占所有文献的79.38%;《湖南林业科技》是发文量最多的期刊。练佑明、舒金平、王浩杰和蒋国芳等作者发表文章数量名列前茅,练佑明以第一作者发表了11篇中文论文,蒋国芳发表的外文文献最多,这些学者的工作都促进了国际和国内的学术交流。黄脊竹蝗的研究热点与可持续治理高度相关,尤其侧重生物防治和生物学特性。展开更多
文摘Grouting is a major method used to prevent water and mud inrush in tunnels and underground engineering. In this paper, the current situation of control and prevention of water and mud inrush is summarized and recent advances in relevant theories, grout/equipment, and critical techniques are introduced. The time-variant equations of grout viscosity at different volumetric ratios were obtained based on the constitutive relation of typical fast curing grouts. A large-scale dynamic grouting model testing system （4000 mm × 2000 mm × 5 mm） was developed, and the diffusions of cement and fast curing grouts in dynamic water grouting were investigated. The results reveal that the diffusions of cement grouts and fast curing grouts are U-shaped and asymmetric elliptical, respectively. A multi-parameter real-time monitoring system （＆#981; = 1.5 m, h = 1.2 m） was developed for the grouting process to study the diffusion and reinforcement mechanism of grouting in water-rich faulted zone. A high early strength cream-type reinforcing/plugging grout, a high permeability nano-scale silica gel grout, and a high-expansion filling grout were proposed for the control of water hazards in weak water-rich faulted zone rocks, water inrush in karst passages, and micro-crack water inrush, respectively. Complement technologies and equipment for industrial applications were also proposed. Additionally, a novel full-life periodic dynamic water grouting with the critical grouting borehole as the core was proposed. The key techniques for the control of water inrush in water-rich faulted zone, jointed fissures and karst passages, and micro-crack water inrush were developed.
文摘为深入了解黄脊竹蝗的研究动态和热点,本文利用中国知网、万方数据和维普中文期刊服务平台、CAB abstracts和Web of science^(TM)5个数据库,采用Vosviewer软件对黄脊竹蝗的研究进行了可视化分析。结果表明,关于黄脊竹蝗的文献最早发表于1935年,近10年是相关研究发文量的高峰期。黄脊竹蝗相关文献最主要的媒介是学术期刊,占所有文献的79.38%;《湖南林业科技》是发文量最多的期刊。练佑明、舒金平、王浩杰和蒋国芳等作者发表文章数量名列前茅,练佑明以第一作者发表了11篇中文论文,蒋国芳发表的外文文献最多,这些学者的工作都促进了国际和国内的学术交流。黄脊竹蝗的研究热点与可持续治理高度相关,尤其侧重生物防治和生物学特性。
