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- Due to problems of the current sublevel caving hydraulic supports,a low and light-duty integrated caving hydraulic support is developed. 分析了现有低位放顶煤液压支架存在的问题,提出了一种新型轻型低位放顶煤液压支架。
- Sublevel caving without sill pillar is used in Xishimen Iron Mine. 西石门铁矿采用无底柱分段崩落采矿法开采。
- The low dilution mode of ore drawing requies that ore quality management be suited to the feature of ore and rock movement during ore drawing in sublevel caving. 无底柱分段崩落法低贫化放矿方式要求限制废石漏斗在出矿口的破裂。
- As a result,the new scheme of sublevel caving with footwall drifts,is raised. 为此，提出自放顶、设回收进路的无底柱分段崩落法新方案，实施后成效显著。
- Sublevel caving technique has been utilized in Datong mining area under hard rock and hard coal, problems including low recovery ratio and spontaneous fire in gob have been overcome to achieve safe and high prodction. 大同煤矿集团“两硬”条件侏罗纪厚煤层下分层工作面应用低位放顶煤开采技术,解决了传统工艺所造成的煤炭资源回收率低、空区自然发火危险程度高等技术难题,实现了安全高效开采的目的。
- 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。
- The specified digits are assumed to be the low order digits of the group. 指定的位数被认为是该组低序位的位数。
- Of or having to do with the lower order of priests. 初级教士的神职人员中职位较低
- Non-pillar sublevel caving may be used in the mining of gently inclined medium thick orebody when footwall cutting technology is adopted. 在采用下盘切岩工艺后,无底柱分段崩落法可以在缓倾斜中厚矿体中应用。
- Of a lower order than human beings; subhuman. 比人类低级的；低于人类的
- 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。
- Using hydraulic supports in heavy grade longwall face with sublevel caving,anti-topple and antiskid are the key factors. 在大倾角倾斜煤层进行综放开采,支架的防倒、防滑成为决定放顶煤开采成功与否的关键。
- 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。
- Through the quantitative analysis about base cracks of sublevel caving hydraulic supports,some useful measures were taken, effect is well. 通过对放顶煤支架底座开裂原因作定性定量分析,提出了合理的修复措施,修复后,使用效果很好。
- If the lower order does not set us a good example, what on earth is the use of them? 假使下层人士不给我们作出好榜样的话，那么他们到底有何用处呢？
- The measures for reduction of oes losing and degrading are described based on the sublevel caving practice in Hujiayu Copper Mine. 根据胡家峪铜矿的有底柱崩落法实践,探讨降低矿石损失和贫化率的有效途径。
- At last the laser beam with simple aberration, such as no phase aberration and low order Zernike phase aberration, is analyzed. 最后，对无相位畸变和存在低阶泽尼克相位畸变情况下的简单畸变光束进行了相应的分析讨论。
- As a result,the current sublevel caving operation practice,the management and operation experiences and the existing mechanical equipme... 使矿山现行的无底柱分段崩落法作业习惯、管理操作经验和原有的机械设备能得到充分利用,提高了矿石回收率,增强了生产的安全性。
- According to the point of view, the low order larger time-delay system can be controlled by the high order ADRC. 依据这种认识，可用高阶自抗扰控制器来控制低阶大时滞对象。
- The paper is of important instructive importance to reduce loss and depletion by sublevel caving method without sill pilla... 并对今后无底柱分段崩落法降低损失贫化具有重要的指导意义。
