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- It has outlined the law of geometry formula computation as well as the formula derivation of the coal amount among the range of protecting coal column,has pointed out the superiority of this law comparing with the traditional method. 概述了保护煤柱留设的几何公式计算法以及保护煤柱压煤量公式的推导,与传统方法作了类比,指出此法的优越性。
- Probe into the Method of Protecting Coal Column Retaining and Settings 保护煤柱计算方法的探讨
- protecting coal column 保护煤柱
- Study on Engineering Geologic Property of Bed Rock Weathering Zone and The Mechanism of Decreasing Protective Coal Column 基岩风化带的工程地质特性与缩小防护煤柱机理研究
- the protective coal column 保护煤柱
- At present in gasoline de-mercaptan Process active carbon is mainly in forms of coal column and fruit shell(coconut,apricot,etc). 目前应用于炼油厂汽油脱硫醇装置的活性炭有煤质柱状活性炭、果壳(椰壳、杏壳等)活性炭。
- The isolated island working face is surrounded with the goaf and its Surrounding coal column and goaf have a tendency of spontaneous combustion. 孤岛综放工作面四周均与采空区相连,其四周煤柱和工作面采空区易于出现自燃发火。
- Based on remains supposes coal column mining determined,and further to the plan optimization design, remains supposes coal column mining had determined reasonable the width. 在确定了留设煤柱开采的基础上,进一步对方案优化设计,确定了合理的留设煤柱的宽度。
- Uses in the coal column filling to filter the decolorization,may reduce the powdered carbon amount used, improves the monosodiumglutamate quality, department head the coal column service life. 用于炭柱装填过滤脱色，可降低粉炭用量，提高味精质量，延长炭柱使用寿命。
- This paper discusses the reliability of narrow coal column support from load-bearing capacity, pin timbering manner, small hole anchorage cable strengthening and top paste injection etc. 从保证窄煤柱承载能力、顶锚杆支护形式、小孔径锚索加固、顶板预注浆等方面论述了采用窄煤柱支护的可靠性。
- Through surmounting solves the technology knotty problem of retrieving coal column of mining area with the system mechanization mining technique.By application in mining process the effect is better. 通过攻关,解决了综采工艺回收盘区煤柱的技术难题,经过在开采过程中的应用,效果良好。
- They netted the fruit trees to protect them from birds. 他们用网覆盖住果树以使其免遭鸟害。
- Mining on conditions that ponding at the same layer of Yongquan mine area,the method and relative technical parameters of leaving the safety protective coal rock pillar are introduced. 介绍了阳泉矿区在有同层积水威胁情况下开采,留设安全保护煤岩柱的方法和有关技术参数。
- We need to replenish our stocks of coal. 我们需要再次补充煤的储备。
- How can we protect our computer files? 我们怎样才能保护我们的计算机数据？
- She was engaged in protecting wild birds. 她致力於保护野生鸟类的工作。
- She piled on more coal before the fire go out. 在火熄灭之前她又加上些煤。
- I add the coal on the flame continuously. 我不断朝火里添加煤炭。
- A plastic cover protect the computer. 这台计算机由一个塑料防护罩盖着。
- They are ventilating the sap of a coal mine. 他们正在使煤矿坑道通风。
