Through compaction hardness and analog shear rock failure test to drilling core, the paper discusses the possibility of discriminating downhole rock type by using rock acoustic emission frequency.

通过对钻井取心岩样压入硬度及模拟剪切的破岩试验，探寻利用岩石的声发射频率来判别井下岩石类型的可能性。

youdao

Factors that influence the selection of compressive samples for core-drilling test of piling foundations are introduced and analyzed and methods to select the samples are provided in the paper.

介绍桩基础钻芯检测法抗压芯样选取方法的影响因素，并对各个因素进行分析，提出桩基础钻芯检测法抗压芯样的具体选取方法。

youdao

This research was done on the tensile behavior of high performance cement-mortar to concrete through core-drilling and pull-stripping test.

研究了高性能水泥复合砂浆与混凝土之间的粘结性能。

youdao