浸水时间对饱水岩石抗剪强度参数影响的试验研究  

The Experiment Research for the Influence of Immersion Time on Shear Strength of Saturated Rocks

作　　者：夏冬[1,2] 袁雪涛[1,2] 

机构地区：[1]华北理工大学矿业工程学院,河北唐山市060009 [2]华北理工大学河北省矿业开发与安全技术重点实验室,河北唐山市063009

出　　处：《矿业研究与开发》2015年第12期65-69,共5页Mining Research and Development

基　　金：国家重点基础研究发展计划项目(2013CB227902);国家自然科学基金项目(51174045,51304036)

摘　　要：为探究浸水时间对饱水岩石抗剪强度参数的影响规律,对天然状态、饱水状态及不同浸水时间的饱水闪长岩和饱水灰岩进行直剪试验,试验结果表明：浸水时间对饱水闪长岩和饱水灰岩的抗剪强度参数的影响规律基本一致,即在浸水时间不长（1~14d）的情况下,抗剪强度参数随浸水时间的增加其值降低幅度较大;在浸水时间较长（14~60d）的情况下,抗剪强度参数随浸水时间的增加其值降低幅度逐渐较小;浸水时间超过60d后,抗剪强度参数趋于稳定;浸水时间对饱水闪长岩和饱水灰岩内聚力的影响程度均大于其对内摩擦角的影响程度。To investigate the influence of immersion time on the shear strength of saturated rocks,shear tests were carried out on diorite and limestone in natural state,saturated state and varied soaking time respectively.The experimental tests showed that the immersion time had the same influence on the shear behavior of the two different rocks.The value of shear strength decreased relatively high when the immersion time was in 1~14d.Then,the reduction of shear strength was relatively small in the range of 14~60d.When the immersion time was larger than 60 d,the values tended to stabilize.Moreover,the influence of immersion time on cohesion was larger than that on internal friction angle.

关 键 词：饱水岩石 浸水时间 内聚力 内摩擦角 

分 类 号：TD315.1[矿业工程—矿井建设]