裂隙动水注浆渗流压力与注浆堵水效果的相关分析  

Correlation analysis of seepage pressure and water plugging effect during grouting into a fracture with flowing water

作　　者：湛铠瑜[1,2,3] 隋旺华[1,2] 王文学[1,2] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221008 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [3]中国煤炭科工集团重庆设计研究院,重庆400016

出　　处：《岩土力学》2012年第9期2650-2655,2662,共7页Rock and Soil Mechanics

基　　金：国家自然科学基金资助项目(No.40772192;No.41072237);深部岩土力学与地下工程国家重点实验室开放基金(No.SKLGDUEK0903);高等学校博士学科点专项科研基金资助课题(No.20100095110015)

摘　　要：采用裂隙动水注浆设备结合正交试验设计进行了裂隙动水注浆模型试验,获得了渗流压力场与注浆效果和注浆工艺之间的相关关系。结果表明,裂隙动水注浆的渗流压力场包括单峰型、平台型、多峰型、阶梯型4种类型;出现平台型和多峰型渗流压力场时的注浆堵水效果好,而出现阶梯型渗流压力场时的注浆堵水效果差;为了获得好的注浆效果且节约浆液,在渗流压力场为单峰型时应该适量增加注浆量;而在渗流压力场为平台型或多峰型时应该适量减小注浆量;渗流压力场为阶梯型时应该调节浆液配比,缩短凝胶时间。研究结果对应用压力监测及时控制施工质量和调整注浆工艺有指导作用。A series of experiments of chemical grouting into a fracture with flowing water are carried out by using fracture grouting equipment based on orthogonal test design.The correlation among water plugging effect,seepage pressure variation,and grouting technology is obtained by analyzing the test results.The results show that the seepage pressure curves of grouting into a fracture with flowing water can be divided into four types,including single peak type,platform type,multi-peak type and ladder type.The water plugging effect is good when the seepage pressure curves are platform type and multi-peak type.It is poor for water plugging when the seepage pressure is ladder-type.In order to improve the water plugging effect and save the grout,the grout amount should be increased while the seepage pressure is peak type;but it should be decreased while the seepage pressures are platform type and multi-peak type;and the volume ratio of grout should be regulated to short gel time while the seepage pressure is ladder-type.The results can improve the efficiency and technology of grouting based on seepage pressure monitoring.

关 键 词：裂隙 动水注浆 渗流压力 注浆效果 模型试验 

分 类 号：TD265[矿业工程—矿井建设]