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- The form and devel-opment of the blast hole cracking is t he main reason which leads to the effe ctive crush. 不同炮孔周圍裂紋的適量產生與發展,是引起岩石有效破碎的真正原因。
- As a result,the short hole shrinkage method with flat bottom structure was employed to mine the stope firstly,then stoping ore pillar by medium length hole caving method. 后溝金礦採用平底結構淺孔留礦法先採礦房，後用中深孔崩落法回採礦柱，經兩年多的生產實踐，取得較好的技術經濟指標。
- At the Garson Mine in the Sudbury basin, an instrumented test opening has been mined under a paste backfil1ed blast hole stope. 而在薩德伯里盆地的加森礦，已在採用深孔崩礦的膏體充填體下進行試采。
- Blact hole cxplesion in a confed condition within tunneling is analysized,a stage-by-stage blast hole design theory and the related paraameters are presentes. 對掘進中處於夾制情況下的炮孔爆破進行分析，提出炮眼分階段設計的原理及有關的參數。
- The study has sho wn that the deeper the blast holes, the longer the initiation delay time. 應用模型對掏槽微差起爆時間進行的優化研究表明,掏槽微差起爆時間與孔深成正比。
- Keywords Polymer mud;Deep well;Coalbed;Well cleanout;Hole caving; 聚合物鑽井液;深井鑽井;煤層;井眼凈化;防塌;
- Blasters in this unit group fill blast holes with explosives and detonate explosives to dislodge coal, ore and rock or to demolish structures. 爆破員用炸藥填補爆破洞，然後引爆炸藥提煉出煤炭，礦石和岩石或粉碎建築物。
- The stemming length of blasting hole is an important bla sting parameter,directly related to the blasting results. 在爆破中,炮孔堵塞長度是一個重要的爆破參數,它直接關係到爆破效果。
- His strength in a crisis is an ace in the hole. 臨危不懼是他的看家本領。
- By improving parameters of the blasting hole,the charge,charging structure and the priming order etc,the smooth blasting is formed. 通過改進爆破的孔網參數、裝藥量與裝葯結構、起爆順序等,從而形成了光面爆破。
- Sublevel caving without sill pillar is used in Xishimen Iron Mine. 西石門鐵礦採用無底柱分段崩落採礦法開採。
- Water Pump Flow-rate Calculation at Air-sealed Blast Hole 壓氣封口式炮孔排水泵流量計算
- The accordion was in full blast in the hall. 在大廳裏手風琴拉得非常響亮。
- Research into Optimum Length of Stemming in Blast Hole 炮孔合理填塞長度的研究
- A hermit used to live in the cave. 一位隱士曾經住在那個山洞裡。
- The Improvement of the Blast Hole of the Cold Water Roller 梭織燒毛機冷水輥筒進水頭的改進
- We kindled a firebrand in the cave. 我們在山洞裡點燃火把。
- A mouse ran out from the dark orifice of the cave. 一隻老鼠從黑暗的洞口跑出。
- He chiseled a hole in the door to fit a new lock. 他在門上鑿了個孔，以便裝一把新鎖。
- The automatic hoist device of cable of blast hole drills 牙輪鑽機電纜自動卷揚裝置
