帷幕注浆施工技术的综合质量评价

Comprehensive Evaluation of the Curtain Grouting Construction Technology

帷幕注浆已经逐渐成为岩溶地区大水矿山治理地下水、减少矿坑排水量和开采成本、保护井下人员安全和区域水资源环境的重要手段。矿山帷幕注浆是典型的隐蔽工程,施工质量无法给出直接定论,如靠矿坑放水试验评定则需等待很长时间,且地下井巷系统形成后的质量弥补难度较大,因此检查孔成为重要的质量评价手段。以南李庄铁矿帷幕注浆工程试验段为研究对象,通过综合应用注浆量和透水率叠加效应分析、频率曲线、离散系数、单位注浆量变化曲线和浆液结石分布统计等多种质量评价方法,为检查孔设计提供了重要依据,取得了良好效果。

The curtain grouting method has been gradually becoming an important means for control- ling mine groundwater flood in karst regions and reducing mine drainage and mining costs and protecting the underground personel security and regional water environment. Mine curtain grouting is a kind of typi- cal hidden engineering,that is to say, the construction quality of it can not be evaluated directily. It will take us a lot of time to wait for the evaluation results by conducting the experiment of mine pit drainage, Besides that, it is very difficult to make up for engineering quality afer the formation of underground workings system, so, the inspection hole become the perfect means of evaluating the engineering quality. Taking the Nanlizhuang iron curtain grouting engineering as the research object, the superimposed effect method of grouting volume and permeability rate, frequency curve, discrete coefficient, grouting volume curve and grouting stone distribution statistics are applied to provide some important baisis for the design of inspection hole. The good perfect effect is obtained in line with the research results.