drilling depth

Based on an actual project,tests and analyses the heat exchanging performances of the vertical U-shaped ground heat exchanger,and obtains the heat release in summer and the heat absorption in winter of ground heat exchanger for unit well depth and the optimal drilling depth.

根据工程实际情况,对竖直U形地埋管换热器的换热性能进行了现场测试和分析,得出了单位井深地埋管的夏季散热量、冬季取热量及最佳地埋管钻孔深度。

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。