Study on Impact Penetration Test of Rock.
Study on Impact Penetration Test of Rock.
复制标题
岩石冲击侵彻试验研究。
DOI：
10.2473/shigentosozai.108.134
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
T. Tatsumi
中科院分区：
文献类型：
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作者：
S. Okubo;Y. Nishimatsu;Masao Akiyama;T. Tatsumi
冲击穿透试验对于观察岩石经受快速加载的行为非常重要，而这是试验机无法实现的。力-侵彻关系被认为与冲击岩石破碎过程的性能密切相关。大量的实验研究发现，冲击侵彻试验中力-侵彻曲线的斜率比静力侵彻试验中的斜率更陡。然而，不同作者在质量上存在很大差异。 本研究中开发的冲击穿透测试系统包括一把锤子和一根一端带有钻头的圆柱形杆。通过一对半导体应变片测量应力波，并根据测得的应力波计算渗透性。对九块岩石进行了测试，获得了冲击和静态试验的力-渗透曲线，以及单轴抗压强度、间接拉伸强度、杨氏模量、泊松比、施密特回弹硬度和肖氏硬度。冲击试验和静态试验的力-贯入度曲线以及冲击试验的斜率之间存在良好的相关性，静态试验中Kd可以用斜率表示，Ks为Kd=1.2Ks。Kd和Ks之间的差异并不像预期的那么大，只有20%。
Impact penetration test is important to observe the behaviour of rock undergoing very rapid loading which can not be realized by a testing machine. A force-penetration relationship is considered to be closely related to performance of percussive rock fragmentation process.A lot of experimental studies have been carried out and it was found that the slope of force-penetration curve in impact penetration test is steeper than that in static penetration test. However, qualitatively much difference exists from author to author.A system of impact penetration test developed in this study comprises a hammer and a cylindrical bar with a bit at one end. Stress wave is measured by a pair of semi-conductor strain gauges, and penetration is calculated by the measured stress wave.Nine rocks were tested and force-penetration curves in impact and static tests were obtained together with uniaxial compressive strength, indirect tensile strength, Young's modulus, Poison's ratio, rebound hardness by Schmidt hammer and Shore hardness. Good correlation was found between force-penetration curves in impact and static tests, and slope by impact test, Kd can be expressed by slope in static test, Ks as Kd=1.2KsThe difference between Kd and Ks is not so much as expected, just 20%.