SJP水泥浆封堵强涌水钻孔可控注浆工艺技术研究

Research on the Controlled Grouting Process with SJP Cement Slurry for Plugging of Strong Water Gushing Borehole

摘要:

以云南毛坪铅锌矿勘查钻孔涌水治理实践为背景，针对金刚石钻进钻孔高涌水压力和大流量涌水的工程实际，对多种涌水治理方案进行了论证分析。依据实测的涌水量及涌水压力等参数，提出了可控注浆堵涌工艺。论述了SJP水泥浆基本组成及其性能特点，可控注浆止涌的工艺技术，分析了止涌注浆孔口压力变化与孔内浆液处境之间的关系，提出了止涌注浆压力变化中的“零起点”和“零末点”及h值等新概念，以及利用压力变化判断涌水通道类型的方法等。经3个涌水钻孔的注浆止涌的实践表明，按研究成果对大涌水量钻孔进行治理，有效封堵了这3个强涌水钻孔，保证了工程顺利施工。

Abstract:

On the background of practice of water gushing treatment in prospecting borehole in Yunnan Maoping lead–zinc deposit, the paper analyzes several treatment schemes according to the diamond drilling engineering practice with high water gushing pressure and large gushing flow. Based on the measured parameters of water inflow and water gushing pressure, controlled grouting technology is put forward. The paper discusses the basic composition of SJP cement slurry and the performance characteristics and controlled grouting technology, analyzes the relationship between the pressure at orifices and the circumstance of grouting slurry in borehole, and puts forward new concepts of “zero starting point”, “zero ending point” and h value in grouting pressure changing, as well as the way to determine the type of gushing-water tunnel by pressure change, etc. The research result has been successfully applied in 3 serious water gushing boreholes to ensure the smooth construction.