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- drift excavating blasting 平巷掘进爆破
- 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。
- This paper in detail presented the transition of shaft sinking equipment for drift excavation in Wangershan Gold Mine. 摘要:介绍了在山东省望儿山金矿立井施工中,利用立井凿井设施进行平巷施工的改装方法。
- A time history analysis method for calculating the dynamic stability safety factor of high rock slope under excavation blasting is proposed. 提出一种计算岩质高边坡爆破开挖情况下动力稳定性安全系数的时程分析方法。
- This study plays an important role in guiding the excavation blasting construction of the tunnel project and assuring the safety of ground buildings. 笔者研究成果对指导隧道工程开挖爆破施工和保证地面建筑物安全有重要指导作用。
- The roadheader-borne temporary support is enabled to greatly increase the productivity of drift excavation,decrease hand labour for supporting,and ensure productive safety. 在掘进机上增加机载式临时支护机,可以大大提高掘进工作的劳动效率、降低支护工作劳动强度并保障生产安全。
- Basen on the criteria of the peak particle velocity(PPV) for blast-induced damage,the design approach for excavation blasting near contour of rock slope is discussed. 基于岩石爆破损伤影响范围控制的质点峰值振动速度判据,就临近岩石边坡开挖轮廓面的爆破开挖设计方法进行了探讨。
- The experiment about using slim hole and cool explosives to excavate a slope protection layer in excavation blasting is introduced, and excellent effectiveness is achieved. 介绍在边坡保护层开挖爆破中采用小直径低爆速炸药的试验情况及取得的良好效果。
- Excavation blasting of pile-holes under the foundation of a highrise was carried out by use of short-delay blasting for control of particle vibration velocity. 在高层建筑基础底进行石方控制爆破,采用微差手段进行质点振速控制,成功地完成了基底石方控爆任务。
- Construction method on multi?level drift excavating before changing bucket to cage of the shaft hoisting system 竖井改绞前的多中段巷道施工方法
- Because of the weak borehole sealing and inadequate use of the initial free face, the higher investment and unsatisfactory blasting effect still exist in the mine tunnel excavation blasting. 由于炮孔堵塞不牢和初始自由面利用不充分,井下平巷的掘进开挖爆破仍存在投入大、爆破结果欠理想等问题。
- The accordion was in full blast in the hall. 在大厅里手风琴拉得非常响亮。
- 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。
- A tool or machine used for digging or excavating. 挖掘器,挖掘机用于挖掘或采掘的工具或机器
- There is a drift of farmers to the cities. 农民流向城市。
- Application of directional breaking blasting technology and concrete additive in rock drift excavation 定向爆破技术与混凝土外加剂在岩巷掘进中的应用
- The party was going on in full blast. 聚会进行得热闹非凡。
- Quality Control of Cutting Excavation Blasting 平苍段五标路堑爆破工程质量控制
- PRACTICE ON IMPROVEMENT OF BLASTING EFFICIENCY IN DRIFT EXCAVATION WITH REASONABLE CUT METHOD AND BLASTING PARAMETER 合理掏槽方法和爆破参数提高平巷掘进爆破率的实践