Response Differentiation of Rock Characteristics Under Impact Loading

摘要：

　　An innovative dynamic test simulation system was used for impact drilling,a series of experiments were carried out on intact sandstone,limestone,gabbro and marble rocks.The reflected stress wave in the experimental bar was measured and the corresponding strain energy was calculated.The results have shown that the response degree of reflected stress wave depends on impact energy and lower threshold value of response.It is hard to detect under current technical conditions if the impact energy is below the threshold value.The peak reflected stress wave and the specific strain energy relate to rock type,strength and wave impedance.For the same type of rock,it grows with increasing impact energy,the ratio is related to the wave impedance instead of impact energy when it is over or equal to the threshold value.It shows significant differences in experimented rocks.

关键词： Rock Impact energy Peak stress wave Specific strain energy Response differentiation

作者: Naigen Tan

作者单位: School of Civil and Environmental Engineering,University of New South Wales,Sydney,NSW 2052,Australia

会议类型: 国际会议

会议名称: The 8th International Congress on Environmental Geotechnics(第八届国际环境土工大会)

会议地点: 杭州

会议语种:英文

页码: 471-480

在线出版日期: 2018-10-28（万方平台首次上网日期，不代表论文的发表时间）