Detection device is applied to check the position of gas leakage for determination of rational sealing depth.
为提高矿井煤层气抽采钻孔封孔效果,提出了应针对煤层地质条件,优先选择新型封孔材料及联合封孔,提高钻孔密封性,且使用钻孔漏气部位检测装置确定合理的封孔深度。
The method of evaluating perforating depth is to be changed from sampling evaluation by the amount into sampling evaluation by the number so as to evaluate the performance of big-role perforators.
指出了穿孔深度检测存在的缺陷。
There are several factors influencing on the perforating depths, such as capability of explosive, shock wave forms, liner materials, structure and shape of liner, explosion height and shaped charges shell.
探讨了影响石油射孔弹穿孔深度的几个主要因素,主要包括炸药性能、爆轰波形、药型罩材料、药型罩形状和结构、炸高和壳体的作用和影响,综合考虑各种因素的影响,才能使石油射孔弹达到最大的穿孔深度,从而获得最佳的效益。
Combining an engineering practice, it studied and discussed the hole termination depth of drill hole concrete pile and provided rational measures for guaranteeing that the bearing capacity of foundation would satisfy the design requirement.
通过工程实例，对钻孔灌注桩终孔深度进行探讨，并提出合理的措施，以保证地基承载力满足设计要求。