不同煤层倾角对围岩及顶底板影响的数值模拟

来源 :煤矿安全 | 被引量 : 0次 | 上传用户:littleycy
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
以安徽某煤矿倾角煤层采煤工作面的开采为工程背景,通过FLAC^3D大型模拟软件对不同煤层倾角采煤工作面开采后采场围岩及顶底板矿压分布规律进行研究。研究结果表明:倾角对煤层工作面开挖后采场围岩应力分布、支承压力的分布有显著影响。倾角煤层工作面开采后,采场顶板岩层的变形、破坏和运动形式不同于一般煤层工作面且采场顶板应力分布是不对称的。
其他文献
The 2101, 2205 and 2507 are duplex stainless steels. They have two phases: austenite and ferrite. The metallurgical characterization was performed by means of S
今年一季度,建设工业集团旗下的建设摩托和重庆牌摩托本部内贸销量同比增长了1.8%,内贸销售额同比增长了11.5%,尤其是3月份本部摩托车销量环比增长了37.4%。
The role of carbon black is especially important in cokeless metallurgy. Carbon black can be isolated at less hot zones (less than 720) in metallurgical ovens a
链条传动的摩托车可以说传递动力到后轮的最后一个传动装置就是链条,它的松紧程度会直接影响到摩托车的性能与安全性。如果链条过松,满载或加减速时,就会感到迟滞,不顺畅,且
The present work evaluated the use of photo-Fenton process for the treatment of kraft pulp mill effluent. The photo-Fenton best operating conditions, such as pH
Bioactive glasses in the system SiO2-Na2O-CaO-P2O5 were prepared by the conventional melting process at a high temperature in an electric furnace. The densities
This use of biomass-based adsorbent has been explored for the column study of the adsorptive dehydration of water in ethanol-water mixtures. The column study wa
The inhalation of the aroma of Rosemary essential oil has been shown to enhance cognition in healthy adults. In this independent groups design study we exposed
“振兴中华”,自改革开放以来,已成为我们奋发图强,到本世纪末使我国实现四个现代化的强大精神支柱。但如今历史的脚步已跨进九十年代,而我国现有的科学技术和经济发展水平却
一、导言经济效益的综合评价是经济管理工作者很关心的一个重要课题。几年来,国内学术界对如何进行经济效益的综合评价问题进行了大量的研究和探讨,提出了众多的经济效益综合