溶蚀白云岩含水层地面预注浆堵水技术研究  

Surface Pre-grouting Technology for Water Sealing in Dissolved DolomiteAquifer

作　　者：李斌 周禹良[1,2,3] 杨雪 李强 LI Bin;ZHOU Yuliang;YANG Xue;LI Qiang(Beijing China Coal Mine Engineering Co.,Ltd.,Beijing 100013,China;National Engineering Research Center of Deep Shaft Construction,Beijing 100013,China;School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]北京中煤矿山工程有限公司,北京100013 [2]矿山深井建设技术国家工程研究中心,北京100013 [3]中国矿业大学(北京)力学与建筑工程学院,北京100083

出　　处：《煤炭技术》2023年第5期135-138,共4页Coal Technology

基　　金：国家自然科学基金资助项目(51874173);天地科技股份有限公司科技创新创业资金专项项目(2021-TD-QN004)。

摘　　要：为了解决老虎洞磷矿1^(#)进风井穿越溶蚀孔隙型含水层井筒防治水难题,采用COMSOL软件渗流模块模拟了浆液扩散范围。采用双孔注浆模型研究得到注浆孔合理孔间距为4.5 m,并进行了1^(#)进风井地面预注浆工程设计,确定了钻孔布置形式、注浆段高和注浆压力。详细介绍了1^(#)进风井地面预注浆工程施工情况,分析了注浆过程中地层透水率变化情况。注浆结束后,压水试验表明,地层透水性明显降低,地层透水率降低至0.5 Lu以下,地层由中等透水性地层转变为微透水地层。1^(#)进风井井筒剩余涌水量为5.17 m^(3)/h,注浆堵水效果显著。研究成果可为西部地区类似条件井筒水害防治提供技术参考。In order to solve the problem of water prevention in the No.1 air intake shaft of Laohudong phosphate mine,the seepage module of COMSOL software was used to simulate the slurry diffusion range.The reasonable spacing of grouting holes of 4.5 m was obtained by using the two holes grouting model.The surface pre-grouting engineering design of the No.1 air intake shaft was carried out,and the borehole arrangement,grouting section height and grouting pressure were determined.The construction of surface pre-grouting of No.1 air intake shaft was introduced in detail,and the change o permeable rate during grouting was analyzed.The water pressure test shows that the permeable rate o the stratum is significantly reduced.The permeable rate of each grouting section was reduced to less than 0.5 Lu after the completion of grouting,and the formation is changed from medium permeable formation to slightly permeable formation.The residual water inflow rate of the No.1 air intake shaft is estimated to be 5.17 m~3/h,and the water plugging effect of grouting is remarkable.The research results can provide technical reference for shaft water prevention in similar conditions in the western region.

关 键 词：溶蚀白云岩 地面预注浆 竖井井筒 水害防治 数值模拟 

分 类 号：TD745[矿业工程—矿井通风与安全]