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- actual mining coal pillar 回采煤柱
- Keywords mining engineering;shallow seam;water retention during mining;mining coal at intermission;numerical simulation;coal pillar stability; 采矿工程;浅埋煤层;保水采煤;间歇式开采;数值模拟;煤柱稳定性;
- The company is mining coal in the south of country. 该公司正在国家的南部开采煤矿。
- 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。
- 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。
- At one time they used to mine coal in these valleys. 从前他们在这些峡谷中采煤。
- 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。
- Study was conducted on the roof of No. 3604S4 coal face and the actual mining roadway with fractals, and a few kinds of functional values of subsidence velocity of this face were obtained. 用分形对3604S4工作面和回采巷道顶板进行了研究,得到了该工作面下沉速度的几种分维值。
- 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。
- The man mines coal where day seems like night. 这个人在即便是白天也犹如晚上的地方开采煤炭。
- 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。
- Local people have been mining coal here since the sixteenth century. 当地人从16世纪开始就在这儿开采煤矿。
- 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;
- Based on the multiple problems existing in design of bolting support in Datun Mining Area nowadays, the parameters of bolting (cabling) with wire mesh in actual mining ... 在综合讨论大屯矿区现用锚网支护设计方法尚存问题的基础上,对厚煤层放顶煤沿底回采巷道的锚网(索)支护参数设计方法进行了全面分析。
- 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。
- 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。
- BASF was mining coal until the late 1980s, and today even that might again make sense. 巴斯夫直到1980年代的后期才开始涉足煤矿业,今天看来也是明智之举。
- 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。