井筒地面预注浆中浆液扩散距离的探讨

Study on Diffusion Length of Grout in Pre-grouting from Ground

地面预注浆法已成为立井井筒特殊凿井施工技术的1个重要组成部分,然而,井筒地面预注浆的理论研究却滞后于施工工艺的发展。在实际工程应用中,一直凭借施工经验来确定注浆浆液的扩散距离,导致只能估测浆液形成的堵水帷幕厚度;利用单裂隙层状岩体渗流模型,通过研究注浆浆液在裂隙岩体中流动的规律,并结合工程实例,分析影响浆液在基岩中扩散距离的因素。

Grouting technology from the surface has been an is widely used in Coal industry , now the Pre-grouting technology important part of special shaft-sinking field. But the study on the mechanism behind the technology on the Pre-grouting from the surface. In practical application, the diffusion length of grout is often determined by experience, which lead to assess grout formed only water curtain thickness; By utihzing the model of seepage in single fissure bedded rock and researching the law of the flow in the fractured rock, this thesis analyzed the various factors influencing the diffusion length of grout with project examples.