您要查找的是不是：
- light supports caving mining 轻型支架放顶煤
- top- coal caving mining with light supports 轻放工作面
- To-and-fro Mining Technology Practice of Caving Mining Face with Light Supports in Single Mining Area 单翼采区轻放工作面往复式开采技术实践
- Application of Light Support for Fully-mechanized Caving Mining in Large-angle Face 轻型综放支架在大倾角工作面开采中的应用
- Application of Angular Bisector Theorem in light support caving face design 角平分线定理在轻放工作面下头调斜中的应用
- Study on Technology of Preventing Collapse of Coal Wall and Roof Leakage in Light Supports Top-coal Caving Mining Face with Extra-thick Soft Seam 特厚极软煤层放顶煤工作面防片帮、漏顶技术的研究
- Practice and experience of driving gob-side entry in shortwall top-coal caving mining with light supports during residual mining 短壁残采轻放工作面沿空掘巷的实践与认识
- The simulation on the laws of top-coal and roof movement in suspensive-advancing support caving mining in flat-dipping thick seam 缓倾斜厚煤层悬移支架放顶煤顶板活动规律模拟试验研究
- Is the color code shown on platform, light support, access stair and so on? 平台、灯架、通道楼梯等部位标示有颜色代码吗?
- During the drivage of main-gate in long-wall face with fully mechanized caving mining, the gate is hard to support due to its loose and broken roof, large cross-section and long span. 在综采放顶煤工作面顺槽掘进过程中,由于顺槽煤层顶板松动破碎,并且顺槽采用矩形断面,顶板跨距较大,不利于巷道支护。
- 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。
- Outlook Web Access Light supports accessibility features for users who are blind or have low vision, and it will run on most Web browsers. Outlook Web Access基本版本支持针对失明或低视力用户的辅助功能,在多数Web浏览器上都可运行。
- 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；
- I groped for the light switch in the dark room. 我在黑暗的房间里摸索着找电灯开关。
- 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]
