您要查找的是不是：
- roadway caving mining 巷柱式放顶煤
- On the basis of industry test,this paper analyses mining feasibility of applying roadway caving method and caving broken mechanism in high gas steeply indined medium coal seams. 在工业性试验的基础上,分析了在高瓦斯急倾斜中厚煤层中应用巷道放顶煤法开采的可行性和顶煤的破碎机理。
- Test result clears,roadway caving method possesses adventages of simple technology,high efficiency and safety,it finds out a good method for mining high gas steeply indined middle coal seams. 试验结果表明,巷道放顶煤采煤法具有工艺简单、效率高、安全性好等优点,为高瓦斯急倾斜煤层找到了一种有效的开采方法。
- Analyses that system mechanization caving mining roadway is the whole coal and was beared stress complex.Discusses the important meaning for studing its roadway surround rock stability. 分析了综采放顶煤回采巷道为全煤巷道,并且所受应力复杂,阐述了对该巷道围岩稳定性研究的重要意义。
- 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。
- Study on Roadway Surround Rock Stability of System Mechanization Caving Mining 综采放顶煤巷道围岩稳定性的研究
- A raised roadway, as across water or marshland. 堤道加高的行道，如穿过水洼或沼泽的道路
- Don't stop on the roadway; move in to the side. 别在车行道上停留;到边上来。
- 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。
