摘要
为了探求饱和卤水对察尔汗地区盐岩力学特性的影响,以该地区发育的盐岩为研究对象,通过采用分层饱和法、锯式干磨法对野外采集得到的盐岩样进行加工,对加工完成的盐岩进行单轴压缩法试验。结果表明:天然状态条件下盐岩单轴抗压强度为4. 2～7. 9 MPa,属于软岩。使用当地的原位卤水饱和作用后,不含泥质夹层盐岩的软化系数为0. 59～0. 7,含泥质夹层的盐岩软化系数为0. 38～0. 67;综合分析卤水饱和状态对盐岩的力学特性影响认为,卤水主要通过溶解盐岩矿物,导致内部结构发生变化,最终使岩石强度减弱,盐岩软化;饱和卤水对含泥质夹层盐岩的软化影响大于无泥质夹层盐岩。
In order to explore the effect of saturated brine on the mechanical properties of salt rock in Qarhan area,the salt rock samples developed in the area were studied,and the salt rock samples col-lected in the field were processed by layered saturation method and saw-type dry grinding method.An experimental study was carried on the salt rock developed in Qarhan area by means of uniaxial compression.The result shows that the average uniaxial compressive strength of salt rock is between4.2and7.9MPa,which belongs to soft rock.By using brine in situ to make rock salt be saturated,The softening coefficient of salt rock without argillaceous interlayer is between0.59and0.7,and that of salt rock with argillaceous interlayer is between0.38and0.67.A discussion was also carried on the mechanism of mechanical properties of salt rock,which points out that the uniaxial compres-sive strength of salt rock decreases under saturated brine,and the effect of saturated brine on the sof-tening of argillaceous intercalated salt rock is greater than that of non-argillaceous intercalated salt rock.In a way,this research has played a leading role to the project construction in Qarhan area.
作者
李斌
张文
罗艳珍
王珑霖
LI Bin;ZHANG Wen;LUO Yanzhen;WANG Longlin(Qinghai University ,Xining,810016 , China;The Northern Qinghai - Tibet Plateau Cenozoic Laboratory of Resources and Environment,Xining 810016,China)
出处
《青海大学学报（自然科学版）》
2018年第6期21-27,共7页
Journal of Qinghai University(Natural Science)
基金
国家自然科学基金项目(51468055)
青海省级重点实验室建设项目(k071714)
青海省"135"人才工程项目
关键词
察尔汗地区
单轴抗压强度
饱和盐岩
力学特性
Qarhan region
uniaxial compressive strength
saturated salt rock
mechanical properties
