hole diameter

Based on analysis of the mechanism of drill hole explosion and diluted hydrochloric acid well cleaning, unified well cleaning method is put forward.

在分析钻孔径裂爆破作用和稀盐酸酸化洗井处理的基础上 ,提出了钻孔径裂爆破和稀盐酸联合洗井工艺 ,5眼基岩区水井工程实例证明 ,这种洗井工艺效果显著 ,值得推广。

Application of drill hole technology in inclined shaft's dewatering system;

钻孔技术在斜井排水中的应用

3D reconstruction from section plane views based on drill hole information;

基于钻孔信息的二维剖面图的三维实体重建

Study on the equipment and machining methed of drilling-tapping once shaping;

钻孔和攻丝一次成形的加工方法及设备研究

Experimental simulation of drilling impact of coal sample in three-axle enclosed pressure;

煤样三轴围压钻孔损伤演化冲击实验模拟

Study on drilling performance of swiveling conic abrasive jet;

旋转锥形磨料射流钻孔性能的研究

Technical practice of using downward drilling hole to pull out gas;

下向穿层钻孔抽采瓦斯技术实践

The relation between pumping volume of drilling hole and uranium concentration in pregnant solution;

钻孔抽液量与浸出液铀浓度的关系

An optimum method of calculating drilling hole position in preventing cross-measure cutting coal gas burst is put forward.

提出了在石门揭煤中预防瓦斯突出的一种计算钻孔位置的优化方法。

Grey forecasting method for the gas flow prediction from boreholes;

灰色组合模型在钻孔瓦斯流量预测中的应用

~(210)Po measurement of borehole core and its significance for uranium exploration;

钻孔岩心剖面~(210)Po测定及其找矿意义

Discussion on thickness of borehole casing for in-situ leaching of uranium;

地浸采铀钻孔套管壁厚的讨论

The application of new cementing processing techniques of drill hole for water plugging in coal mine;

煤田钻孔注浆堵漏新技术的应用

An Improvement on the Drilling Technology of Ship′s Exhausted Gas Boiler Pipe Plate;

船舶废气锅炉管板钻孔工艺的改进

The information management of drill in the mining GIS;

矿山地理信息系统中的钻孔信息管理