斜井流砂层段壁后空洞探测及注浆处理技术  

Hollow Exploration and Backfill Grouting for Inclined Shaft Liner in Quicksand Layer

作　　者：袁东锋[1,2] 宋荣普 周禹良 高晓耕 陈振国 

机构地区：[1]天地科技股份有限公司,北京100013 [2]北京中煤矿山工程有限公司,北京100013 [3]中石化长城能源化工(宁夏)煤业有限公司,宁夏灵武750411

出　　处：《煤矿安全》2018年第2期63-66,共4页Safety in Coal Mines

基　　金：煤炭科学研究总院科技创新基金资助项目(2016ZYZD002);天地科技股份有限公司技术创新基金资助项目(KJ-2014-BJZM-03)

摘　　要：流砂层段斜井井壁漏水携砂造成井筒壁后空洞发育,采用地质雷达技术结合钻探验证确定了斜井流砂层段壁后空洞及富水区异常范围。为保证井壁稳定性,采用壁后注浆技术对壁后空洞及富水区进行处理。壁后注浆采用双管注浆工艺,注浆材料包括单液水泥浆及C-S浆。壁后注浆结束后,井壁涌水漏砂情况得到明显改善,检查孔压水试验结果表明井筒壁后注浆效果良好。Water leakage with sand of inclined shaft wall in quicksand layer can lead to hollow development behind lining. The distribution of hollows and water-enriched regions behind the inclined shaft lining in quicksand layer was gained by the ground penetrating radar（GPR） and drilling. In order to ensure the stability of the wellbore, the backfill grouting technique is used to deal with the hollows and water-enriched area. The backfill grouting uses double pipe grouting technique, and the grouting materials include single liquid cement slurry and C-S slurry. The phenomenon of water inflow with sand was eliminated dramatically after the backfill grouting, and the results of grout pressure test indicate a good result for backfill grouting.

关 键 词：流砂层 斜井井筒 地质雷达 空洞探测 壁后注浆 

分 类 号：TD745.26[矿业工程—矿井通风与安全]