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- non - pillar sublevel caving method 无底柱分段崩落法
- A vibration velocity measurement and research of a side blasting with non-floor pillar sublevel caving stoping for transforming opencast mining into underground mining in Daye iron mine is made. 对大冶铁矿东露天转地下开采无底柱分段崩落法回采挂帮矿爆破振动速度的测试与研究表明,质点爆破振动速度与单响最大爆破药量、爆心距、炸药种类和堵塞情况有关。
- sill pillars sublevel caving method 有底柱分段崩落法
- 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。
- Keywords sill pillars sublevel caving method;trenching tunnel;bottom structure; 有底柱崩落采矿法;堑沟巷道;底部结构;
- Disadvantages of sublevel caving without sill pillar lie in high ore loss and dilution as well as difficult control of ore loss and dilution. 无底柱分段崩落采矿法存在损失贫化大和损失贫化难以控制的缺点。
- The mining method which will be used at Hebei Fanshan Phosphorus Mine is a new one combining the sublevel caving mining method with sill pillar and sublevel caving mining method without sill pillar. 河北矾山磷矿采矿方法为有底柱和无底柱采矿法相结合的一种新的采矿法，其采场结构参数选取正确与否，将直接影响该方法优越性的发挥。
- 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 without sill pillar 无底柱分段崩落法
- sublevel caving method without sill pillar 无底柱分段崩落法
- Sublevel caving with sill pillar 有底柱分段崩落法
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
