By introducing the micro change of water level, its forming condition and forming reasons, the author tries to research the geohydrology and mining technical conditions of the ore field.
通过介绍水位微动变化及其形成条件、产生原因等，试图从另一侧面认识和研究矿区水文地质条件、矿床开采技术条件等。
On the basis of illustrating the meaning of optimizing mining design, the main technical contents and practicable conditions of the optimization adopted by mines are given.
在阐述矿山开采优化设计命题内涵的基础上，指出了矿山开采优化设计的主要技术内容及其实施的条件。
The technical mining conditions of mineral deposit of Baofengshan Lead-Zinc Mine are stated in detail, some problems in application of shorthole shrinkage stoping introduced.
详述了宝丰山铅锌矿的矿床开采技术条件，介绍了浅孔留矿法在应用中存在的问题。
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