爆炸与冲击2009，Vol.29Issue(4)：419-424,6.
受三维静载压缩岩石对冲击能的吸收效应
Impact energy-absorption property of rock under tri-axial compression
摘要
Abstract
By means of the improved SHPB with axial pre-pressure and confining pressure, a series of experiments on sandstone were carried out to investigate the energy consumption in rock fracturing during the course of deep underground resources exploitation. In the experiments, the cylindrical sandstone specimens were subjected to the static-dynamic coupling loads with fixed confining pressure or fixed axial static pressure. Under fixed confining pressures, the dynamic load energy densities consumed by the breakage of the sandstone specimens decrease gradually with the increase of axial static pressures. When the axial static stress is above 70% of the corresponding static tri-axial compressive strength, the dynamic load energy density consumed is below 0, namely, the sandstone specimens release energy. With the further increase of the axial static stress, the negative dynamic load energy density consumed approaches gradually to 0 and keeps below 0. If the axial static stress fixed is low, the dynamic load energy density consumed by the sandstone specimens increases continuously with the increase of the confining pressure. When the axial static stress fixed is great and above 70% of the corresponding static tri-axial compressive strength, the sandstone specimen can be fractured by itself and release the rest energy after losing the former balance by dynamic disturbance.关键词
固体力学/吸能效应/动静组合载荷/细砂岩/SHPBKey words
solid mechanics/ energy absorption/ static-dynamic coupling loads/ sandstone/ SHPB分类
数理科学引用本文复制引用
叶洲元,李夕兵,万国香,周子龙,尹土兵,洪亮..受三维静载压缩岩石对冲击能的吸收效应[J].爆炸与冲击,2009,29(4):419-424,6.基金项目
国家自然科学基金重大项目(50490274) （50490274）
国家自然科学基金项目(10472134),高校博士点专项基金项目(20060533011) （10472134）
