新近系地层井筒注浆堵水的实验研究  

Experimental study on wellbore grouting water plugging in neogene strata

作　　者：代少军 毕玉成 高乃志 Dai Shaojun;Bi Yucheng;Gao Naizhi(School of Mining Engineering,Heilongjiang University of Science&Technology,Harbin 150022,China;China Construction Third Engineering Bureau Co.Ltd.,South Branch,Guangzhou 510000,China;China Coal Heilongjiang Coal Chemical(Group)Co.Ltd.,Yilan No.3 Coal Mine,Harbin 154854,China)

机构地区：[1]黑龙江科技大学矿业工程学院,哈尔滨150022 [2]中建三局集团有限公司南方公司,广州510000 [3]中煤黑龙江煤炭化工(集团)有限公司依兰第三煤矿,哈尔滨154854

出　　处：《黑龙江科技大学学报》2021年第6期679-685,共7页Journal of Heilongjiang University of Science And Technology

摘　　要：依兰第三煤矿3条立井施工时需穿过涌水量较大第四系冲击层和新近系含水层,井筒掘进施工困难。利用抽水实验、注浆实验等方法,优化了注浆压力、单孔注浆量、单孔注浆时间、井壁结构等参数。结果表明:副井、风井注浆钻孔平均涌水量由第一次注浆后的7.34、10.86 m^(3)/h,下降为第二次注浆后的6.17、5.05 m^(3)/h,降幅分别为15.9%、53.8%,优化后的注浆方案堵水效果明显;通过优化井筒井壁结构,采用“工作面预注浆+壁后注浆”方案后,井筒涌水量由20 m^(3)/h降至5 m^(3)/h以下。该方案可有效治理新近系含水层水患,为同类地质条件下立井井筒掘进提供借鉴。This paper aims to overcome difficulties in shaft excavation due to the construction of 3 shafts passing through the fourth alluvium and Neogene aquifer with bigger water inflow in the Yilan No.3 Coal Mine.The solution is obtained by optimizing parameter of injection pressure,grout amount and time of single hole,and shaft lining structure using pumping test and grouting test.The result shows that the optimized grouting scheme gives an obvious water plugging effect thanks to the reduction from 7.34,10.86 m^(3)/h of the first grouting to 6.17,5.05 m^(3)/h of the second grouting in the average water inflow of auxiliary shaft and air pit grouting borehole,with decreasing range of 15.9%and 53.8%,respectively;the optimization of wellbore wall structure and the application of working face pre-grouting and wall-back grouting results in a reduction from 20 m^(3)/h to below 5 m^(3)/h in shaft water inflow.The proposed approach could provide an effective control flood of Neogene aquifer and inform the shaft excavation of the similar geology.

关 键 词：矿井 新近系含水层 工作面预注浆 壁后注浆实验 

分 类 号：TD743[矿业工程—矿井通风与安全]