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- rock drift driving 岩巷掘进
- For many years, because of the bad rock condition and big ground stress, it limited the main opening and the speed of drift driving seriously, directly affect the mining methodically. 多年来,由于金川岩体条件较差,地应力大,严重制约井下主要开拓、采准巷道的掘进速度,直接影响矿山生产有条不紊的进行。
- Rock and ore separate mining test in drift driving 沿脉巷道掘进岩矿分掘试验
- This paper introduces the application about anchor cable jetting combined supporting in broken soft rock drift. 重点介绍了锚索喷注联合支护在碎胀软岩巷道掘进中的应用。
- The deformation and stability mechanisms of pelitic soft rock drift under rich water condition are more complicated than those of the general ones. 富水条件下泥质软岩巷道破坏及稳定性机制比一般软岩巷道更复杂;不仅需要采用多种复合支护控制围岩非线性大变形;还必须进一步控制其泥化进程.
- According to lab model experiment and theory analysis,the rational delay intervalof millisecond blasting used in rock drift excavating was acquired and a new type of long millise-cond delay detonator was researched and manufactured. 根据实验室模型试验和理论分析得出岩石巷道掘进微差爆破合理延迟间隔时间，据此研制出新型长延迟毫秒雷管。
- Working practices in rock drifts show that the selected slit-charge directed fracture blasting method is feasible,it opens u... 经岩巷生产实践表明：所选择的切缝药包定向断裂爆破方法是可行的，它为改革现有光面爆破技术提供了良好的应用前景。
- Soft Rock Drift Supporting Technique in Highland Stress 高地应力软岩巷道支护技术
- Application of supporting technology at soft rock drift 软岩巷道支护技术及在实践中的应用
- I didn't get the drift of his argument. 我没有听懂他论点的要领。
- I can't quite catch the drift of his speech. 我不甚了解他的演讲的大意。
- The rock was honeycombed with passages. 岩石上有许多蜂窝状的小孔。
- There is a drift of farmers to the cities. 农民流向城市。
- Many young rock hounds grow up to be geologists. 许许多多爱好收集岩石的少年，长大后成了地质学家。
- The climber had to negotiate a steep rock face. 那攀登者得攀越一陡峭岩石。
- This layer of rock contains a lot of flint. 这一岩层中有大量燧石。
- Application of smooth blasting one-step forming technology in drift driving for large-sized section 光面爆破一次成型法在大断面巷道掘进中的应用
- The water had worn a channel in the rock. 水把岩石冲出了一条沟。
- He dash the glass bowl to bit on a rock. 他对著石块把玻璃碗砸得粉碎。
- The mountain rise up in a steep wall of rock. 这座山高而陡，形成一道岩石屏障。
