1) Underground well
井下矿井
2) coal mine underground
煤矿井下
1.
Study on scheme of IF mobile communication in coal mine underground;
煤矿井下中频移动通信技术方案研究
2.
The status of mobile communication in coal mine underground is introduced, the difficult technical problems including laneway infection for wireless transmission and weak signal reception and noise interference are analyzed, and ways to solve these problems are proposed.
介绍了我国煤矿井下移动通信现状,分析了技术上的难题-巷道对无线传输的影响、弱信号接收和井下环境噪声干扰,提出了解决途径。
3.
To solve the problem of frequent over-grade trip of fast short-circuit protection in high voltage power supply system of coal mine underground,a scheme of adaptive protection system based on independent substation was proposed.
针对煤矿井下高压供电系统速断保护经常越级跳闸的问题,提出了一种基于独立分站的自适应保护系统方案。
3) underground mine
井下矿
1.
The characteristics and problems of different persons appearing in safe operation management of underground mine are analyzed.
针对构成井下矿山整体中的不同人员在安全生产管理中所反映出的问题加以分析,采取不同的管理方法,以保证井下矿山安全生产管理有序高效地进行。
2.
Based on measurement and analysis of blasting vibration of surface mine and underground mine, all-round and scientific criteria of blasti ng safety are suggested.
通过对露天矿和井下矿的爆破振动的测试分析 ,提出了比较全面、科学的爆破振动安全判据建议标准。
3.
The mining system of an underground mine is a large and complicated one that consumes huge amount of water.
利用井下矿地下涌水作为矿山生产用水水源 ,在矿井排水与生产供水之间建立循环系统 ,不但合理地利用了水资源 ,节约了矿山生产新水给水 ,而且减少了大量投资 ,使矿山生产成本也随之大幅度降低 ,收到了很好的效益。
4) underground mine
地下矿井
1.
Application of reliability analysis in some underground mine;
可靠度分析在某地下矿井中的应用
5) underground mine
煤矿井下
1.
Penetration ability of radar wave is an important index for evaluation of application of radar in underground mine.
雷达波的穿透能力大小是衡量雷达在矿井中应用效果好坏的重要指标，它取决于介质的电磁波衰减系数，衰减系数越小，雷达波的穿透能力越大，衰减系数随着介质电导率的增大而增大，煤矿井下介质主要为低电导率的煤层、砂岩、页岩、灰岩，它们的衰减系数较小，雷达波在这些介质中穿透能力较大。
6) underground mine
井下矿山
1.
The new products,new structures,new technicals and new development of drilling equipments,carryscrapers,trucks and auxiliary operation equipments in foreign underground mines are described.
综述了国外井下矿山凿岩设备、铲运机、汽车及辅助作业设备的新产品、新结构、新技术和新发展。
补充资料：白银有色金属公司深部铜矿主井和副井
白银有色金属公司深部铜矿主井和副井
白银有色金属公司深部铜矿主井和副井
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