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- It is key problem to raise the top coal recovery rate of the fully mechanized sublevel caving mining. 提高顶煤放出率是综放开采的一个重大课题,预注水弱化顶煤是解决这一问题的有效方法之一。
- Finally, the paper considers that the fully mechanized coal caving mining is helpful to control outburst hazard. 认为:具突出危险性的厚煤层采用综采放顶煤开采法对消突是有积极作用的.
- Cut-off grade method has been used to control the ore drawing in non-pillar sublevel caving mining both in and outside China. 采用无底柱分段崩落采矿法,国内外一直采用截止品位放矿法来控制出矿。
- This article introduced applications,observation and research's actuality and developing trend of fully mechanized top coal caving mining under water. 介绍放顶煤开采技术在水体下采煤领域中的应用情况、观测研究现状及其发展趋势。
- Formula(1),(2),(6),(7) are calculating foundati on to define working face length for fully mechanised caving mining under defini te geology factor. 文中式(1)、(2)、(6)、(7)可作为在地质因素一定的条件下,确定综放工作面长度的计算依据。
- Research shows that main cause of ore dilution in sublevel caving mining is tlnrational cut-off grade drawing.Non-dilution ore drawing is most ideal drawing mede. 研究表明,造成无底柱分段崩落法来出矿石贫比大的根本原因在于采用了不合理的截止品位放矿方式,无贫化放矿是无底柱分段崩落法最为理想的放矿方式。
- Favorable and unfavorable factors of mining under sea are analyzed in this paper after introducing the cause of selecting full-mechanized caving mining. 摘要介绍了龙口海域下开采的有利与不利因素,分析了海域下选择综放开采的原因;
- FU Qiang,WU Jian.Research on the drawing technology of thinner top-coal in longwall sublevel caving mining[J].Ground Pressure and Strata Control,2000,17(3):2-6. [7]富强;吴健.;顶煤较薄煤层综放开采放煤工艺研究[J]
- The relation between ore loss and dilution during drawing in sublevel caving mining is analysedand studied on the hasis of the results from experiments and production. 本文根据实验及生产放矿结果,分析研究了无底柱分段崩落法放矿过程中矿石损失贫化的关系问题。
- The application of elevated fully mechanized caving mining technology is an economical and efficient means for an old coal mine with an exploitation history of 38 years. 应用高位综放工艺回采煤柱资源对于已有38年开采历史的老矿来说是一种经济、高效的手段。
- According to the theory and method of particle flow code in two dimensions (PFC2D), the block caving law of natural caving mining method was investigated. 以自然崩落采矿法为研究对象,利用二维颗粒流数值模拟(PFC2D)的原理和方法,研究了自然崩落法矿体崩落规律。
- Nitrogen injection to the gob with buried pipes is used in 7235 full-mechanized caving mining face in Xuzhuang Colliery to prevent the left coal oxidizing and self-igniting. 摘要介绍了徐庄煤矿7235综放面开采中,采用埋管注氮方式向采空区注氮,防止采空区遗煤氧化自燃。
- Application of caving mining technology with bottom under condition of flat dipping mid-thick body and unstable rock caused the most of trench and bottom drift, located in abutment , to be destroyed and low recovery in south area, Xishimen Iron Mine. 摘要在缓倾斜中厚矿体底板岩性不稳固的条件下,采用有底柱崩落法,由于电耙道大多处于空区边部应力集中的部位,致使堑沟及底部结构巷道破坏严重而使回收率极低,采用无底柱崩落卸压则可有效解决上述难题。
- He walked with a stride full of purpose. 他迈着坚定的步伐向前走。
- With the increase of the depth of coal seams mined, rock bursts will easily occur in gateways with fully-mechanized sublevel caving mining. 摘要随着煤矿开采深度增加,综放开采回采巷道易发生冲击地压危害。
- She has a book full of cuttings about her film. 她有一本书贴满了关于她的一些影片的剪报。
- The druggist put in a full stock of drugs. 那位药商进了一大批药品。
- The mechanism of rock bursts occurred in gateways, combined with engineering practice, is studied and the mining in fully-mechanized sublevel caving mining faces is simulated by using the software FLAC(superscript 3D). 研究综放工作面回采巷道冲击地压发生机理,结合工程实例,运用FLAC(上标3D)软件模拟综放面回采。
- New York City's Third Avenue is full of gin mills. 纽约市第3大街上小酒吧林立。
- He delivered a long prose full of platitudes. 他发表了一篇充满陈词滥调的文章。