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- Mining without coal pillar 无煤柱开采
- Keywords without coal pillar;shotcreting mesh support;technical application;economic efficiency; 关键词无炭柱;锚喷网支护;技术应用;经济效益;
- Most people have been without coal for about a week. 大多数人已经有一个星期左右没有煤了。
- The stability of coal pillar of the short-wall mining was analyzed systemically by numerical simulation with the rock failure process analysis software (RFPA2D). 采用岩石破裂过程分析软件RFPA2D系统,对短壁机械化开采的煤柱稳定性进行数值计算与分析。
- The process of producing vanadium pentoxide from bone coal vanadium mine without salt roasting and acid leaching, was systematically studied. 系统地研究了石煤无盐焙烧酸浸生产五氧化二钒的工艺技术,提出了各工序的工艺条件。
- Put forward redistribution of stress in the mining area and Domino effect caused by unstability of coal pillar underground, resulting in sudden roof caving in the gob and surface subsidence. 提出了采场内煤柱失稳破坏引起采场应力重新分布,出现煤柱群连续失稳破坏的多米诺效应,从而导致采空区顶板大面积突然垮落和地表整体塌陷。
- The study indicates that with the increase of the coal pillar width the peak mining stress delays its appearance and the increase of the displacement and stress are not synchronous. 研究表明,综放沿空留巷受采场矿压影响时间和程度随留巷煤柱宽度的增加表现出明显带后现象以及位移和压力增长的不同步现象。
- A rat,however,being small and light,could sit on the mine without exploding it. 而一只老鼠又小又轻,坐在地雷上也不会将它引爆。
- Preferable safety and economy technicalbenefit may be obtained through reasonable and economical method of non coal pillar Gob-side Entry Retaining Mining and the layout of normal heading stope. 通过合理、经济的无煤柱沿空留巷方法布置正规采煤工作面进行回采可获得较好的安全、经济技术效益。
- To think you can do data mining without a statistical or mining background is mind-bog-gling. 那种认为没有统计或挖掘背景的人也能做数据挖掘,是不健全的想法。
- Through studing the coal pillar width Parameter in 3246 along stull machine tunnel in QiDong Coal mine, ascertainment the coal pillar width Parameter in Similar geologic condition . 通过对我矿3246沿空机巷煤柱宽度参数的研究,确定了类似地质条件下的煤柱宽度参数,为今后的采区设计提供了理论依据。
- Secondly, simulation elicits wall rock transmogrification under the different coal pillar and different stress. 其次模拟研究分析了留设煤柱宽度不同时以及地应力大小不一时沿空巷道围岩变形情况,得到了一些认识;
- This feature allows creates high-fidelity backup recovery and data mining without significant impact to performance. 使用该项功能可以创建高保真的备份恢复和数据挖掘,而不会对性能产生显著影响。
- The coal pillar has mode-soft behaviour, so it is possible to estimate the destabilization. 煤柱失稳还具有模态软化特性,可以对失稳的可能性进行佑计。
- The roof rock was assumed in the elastic state,established the mechanical model of coal pillar and roof system. 假设顶板岩层处于弹性工作状态情况下,建立了煤柱-顶板系统的力学模型。
- You've been my right hand here so long,I don't know how I'm to run this business of mine without you. 你一直是我的得力助手,离了你我真不知怎样管理我的事务。
- A rat, however, being small and light, could sit on the mine without exploding it. 而一只老鼠又小又轻,坐在地雷上也不会将它引爆。
- The results indicate that the width of coal pillar has a great influence on the stress distribution of the gob-side entry. 研究表明:留设煤柱的宽度对孤岛面沿空巷道的应力分布有较大影响;
- The mechanical model of key strata supported by coal pillar is set up according to the layout of coal pillars in the coalface of short wall mining. 根据短壁开采条件下保护煤柱的布设特点,建立由保护煤柱支承的关键层力学分析模型。
- In the plastic limit analysis,the wrinkler's plate is smartly analyzed in yield-line theory to get the critical compression strength of the coal pillar. 在分析过程中,利用机动法对温克尔地基板(弹簧支撑板)进行了塑性极限分析,得出了煤柱抗压强度的临界值。