基于高密度电法的井下定向注浆钻孔扩散区域检测技术  

Detection Technology of Diffusion Zone in Underground Directional Grouting Drilling Based on High Density Electrical Method

作　　者：邢修举 XING Xiuju(CCTEG Xi′an Research Institute(Group)Co.,Ltd.,Xi′an 710077,China)

机构地区：[1]中煤科工西安研究院(集团)有限公司,西安710077

出　　处：《煤炭技术》2025年第3期4-7,共4页Coal Technology

基　　金：国家重点研发计划项目(2023YFB260400401)。

摘　　要：为对地面定向钻孔注浆后浆液在井下扩散区域进行有效检测,基于高密度直流电法技术,设计在开挖巷道两侧帮距离底板1.5 m布设等间隔200 mm的浅钻孔测线,进行对称测量。通过实验室物理模拟、数值模拟和袁店二矿轨道大巷检测,结果表明:水泥浆液在凝固硬化浸泡后相对于周围围岩仍然呈现高阻状态,注浆浆液的挤压置换在有巷道空间存在的情况下,左右两帮在视电阻率等值线断面图中会有较明显的差异,巷道探测结果划定的注浆浆液扩散区域经验证吻合实际情况,说明在巷道两侧布置测量点综合对比分析浆液扩散区方法可行,证明了该方法可以在事后进行注浆浆液扩散区检测。In order to effectively detect the slurry diffusion area in the underground after directional drilling and grouting on the ground,based on the high density direct current method technology,a shallow borehole survey line with equal intervals of 200 mm is designed on both sides of the excavated roadway at 1.5 m from the bottom plate.Take a symmetrical measurement.Through laboratory physical simulation,numerical simulation and detection of the main roadway of Yuandian No.2 mine,the results show that the cement slurry still presents a high resistance state relative to the surrounding rock after solidification and soaking,and the squeeze displacement of the grouting slurry is in the roadway space In the case of existence,there will be obvious differences between the left and right groups in the apparent resistivity contour cross-section diagram.The grouting liquid diffusion area defined by the roadway detection results is verified to be consistent with the actual situation,indicating that the measurement points are arranged on both sides of the roadway.The comparative analysis of the grout diffusion zone method is feasible,which proves that the method can be used to detect the grout diffusion zone afterwards.

关 键 词：高密度电法 物理模拟 数值模拟 注浆材料 浆液扩散检测 

分 类 号：TD353[矿业工程—矿井建设] P631[天文地球—地质矿产勘探]