Chemical grout diffusion in porous rock based on response of geoelectric feld  

作　　者：Jiang Chunlu Jiang Zhenquan Liu Shengdong Sun Qiang Yang Cai 

机构地区：[1]School of Resource and Environmental Engineering,Anhui Universtiy [2]School of Resource and Earth Science,China University of Mining & Technology

出　　处：《International Journal of Mining Science and Technology》2013年第5期643-646,共4页矿业科学技术学报（英文版）

基　　金：Financial support for this work;provided by the National Natural Science Foundation of China(Nos.61102117 and 41102201)

摘　　要：Porous rock chemical grouting simulation test was conducted using established large scale physical model.Chemical grout diffusing rule in porous media with different permeability was studied by monitoring the spontaneous potential and exciting current response during grouting.The results show that chemical grout spread evenly in all directions and diffusion areas are approximately concentric circles in the cross section of homogeneous transverse isotropic pore medium,the grout spread flling range can be quantitatively decrypted by the diffusion radius.The average diffusion speed and radius increase approximately as the square root with the permeability coeffcient in different permeability media under the same conditions.Calculation results using Maag cylindrical diffusion equation show that the calculated value of diffusion radius is in good agreement with the test value under different grouting pressures and permeability conditions.Porous rock chemical grouting simulation test was conducted using established large scale physical model.Chemical grout diffusing rule in porous media with different permeability was studied by monitoring the spontaneous potential and exciting current response during grouting.The results show that chemical grout spread evenly in all directions and diffusion areas are approximately concentric circles in the cross section of homogeneous transverse isotropic pore medium,the grout spread flling range can be quantitatively decrypted by the diffusion radius.The average diffusion speed and radius increase approximately as the square root with the permeability coeffcient in different permeability media under the same conditions.Calculation results using Maag cylindrical diffusion equation show that the calculated value of diffusion radius is in good agreement with the test value under different grouting pressures and permeability conditions.

关 键 词：Porous rock Chemical grouting Grout diffusion Response of geoelectric feld 

分 类 号：TD265.44[矿业工程—矿井建设]