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- 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。
- 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。
- Pillar-free sublevel caving mining method 无底柱分段崩落采矿法
- little segment caving mining method without sill pillar 小分段无底柱崩落采矿法
- Feasibility of strip mining method applied to coal caving mining under villages 条带法实现村庄下放顶煤开采的可行性
- Application of Non-pillar Sublevel Caving Mining Method in Chadian Phosphorus Mine 无底柱分段崩落采矿法在汉中茶店磷矿的应用
- Study of the automatic detector for measuring the top coal thickness in bulk - caving mining method 放顶煤顶煤厚度自动探测仪的研究
- Prediction Study of Caving Space in Block Caving Mining Method by Magnetic Strength Change Measured in Field 利用磁铁矿磁场变化预测崩落空间的现场研究
- Preliminary Discussion on Seam Infusion in High-gassy Medium-thickness Seam Face with Caving Mining Method 高瓦斯中厚煤层放顶煤工作面煤层注水初探
- Keywords Block caving mining method;Middle-thich orebody;Orebody cavability;Undercut;Mining;Oredrawing; 自然崩落采矿法;中厚矿体;矿石可崩性;拉底;回采;放矿;
- Prevention and treatment to spontaneous combustion in isolated long wall face with fully mechanized top-coal caving mining method 孤岛综放工作面煤炭自燃的防治技术
- In the end,the index system and technical measures to effectively control cataclastic rock mass caving are proposed, and the downtime due to cataclasti... 在此基础上，本文提出了有效控制碎裂岩体冒顶的指标体系与技术措施，进而在生产实践中成功地控制了碎裂岩体冒顶事故。
- caving mining method 崩落采矿法
- 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。
- natural caving mining method 自然崩落法
- It has great influence on the effect of dilution drawing,that the shape and size of ore remained mass at the tope dilution drawing in sublevel caving mining without bottom pillars. 无底柱分段崩落法矿石残留体的形态和大小在端部放矿对放矿效果有着重大影响。
- sublevel caving mining method 无底柱崩落采矿法
- The longwall coal mining method along a direction,coal-mining technology,longwall coal mining method along the dip,and caving coal technology are discussed. 对单一走向长壁采煤法、采煤工艺、倾斜长壁采煤法以及放顶煤采煤技术进行了论述;
- A cloud is a mass of vapor in the sky. 云是天空中的水汽团。
- We have raised the coal output by using better mining methods. 我们利用更好的采煤法增加了煤炭产量。
