1) hard rock roadway with small cross-section
小断面硬岩巷道
2) hard-rock tunnel
硬岩巷道
1.
Blasting effectiveness is increased greatly and boring-and-blasting technology in deep-seated and hard-rock tunnel is improved.
通过对影响深部硬岩巷道爆破效果因素的分析,优化出淮南矿区不同条件下岩巷掘进用爆破器材和爆破参数,爆破效率有了很大提高,并探究出深部硬岩巷道钻爆法施工的一些经验。
3) hard rock tunnel
硬岩巷道
1.
Based on the feature of-810m hard rock tunnel of Panji No.
根据潘三煤矿-810 m硬岩巷道的特点,通过采用二级水胶炸药、双楔形掏槽、超深中心眼、反向起爆、抬高掏槽眼位置等实验,取得了较好的爆破效果。
2.
But appropriate the blasting parameters of medium deep blasting in hard rock tunnel is always a technical problem need to be solved.
而合理的硬岩巷道中深孔掘进爆破参数则一直是需要研究解决的技术难题。
3.
For the blasting construction in hard rock tunnel of highly gassy mine, specification for Coal Mine Safety regulate that triple permitting coal-mining explosive, positive direction charge and millisecond detonator are adopted.
高瓦斯矿井的硬岩巷道爆破施工,在《煤矿安全规程》规定采用三级的煤矿许用炸药,正向装药,雷管的最后一段延时不超过130 ms的条件下,根据岩石的力学特性进行爆破参数的合理设计,采用斜眼不同阶微差深部掏槽爆破技术,小直径钻头钻进以节省钻眼时间,采用串并联网路,各串联电阻值基本相等,每段起爆的药量尽量相等。
4) roadway section
巷道断面
1.
Optimizing roadway section and lifting mine benefit;
优化巷道断面 提高矿井效益
5) Large cross-section hard rock tunnel
大断面硬岩隧道
6) large rock-gateway
大断面岩巷
1.
achieved the footage above 1200m/a in large rock-gateway shingle-entry developing in 2005,which put down a base for steady development of mine.
开滦(集团)有限责任公司2005年实现了大断面岩巷单头掘进年进尺超过1200m的水平,为矿井的稳步发展奠定了基础。
2.
Achieved the footage above 1200m/a in large rock-gateway shingle-entry developing in 2005, whick put down a base for steady development of mine.
开滦(集团)有限责任公司2005年实现了大断面岩巷单头掘进年进尺1200m的水平,为矿井的稳步发展奠定了基础。
补充资料：异形断面钢材(见异形断面型材)
异形断面钢材(见异形断面型材)
special section steel
，一、u以uu、’“飞豆on gQngC01异形断面钢材(speeial Seetion steel)见异形断面型材。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条