矿山帷幕薄弱区综合分析方法研究

在矿山水害防治工程中，帷幕注浆是一种应用广泛且阻水效果较好的方法，但随着矿山开采深度的增加以及帷幕服务年限的增长，多数帷幕出现漏水和阻水效果降低的现象。结合张马屯铁矿帷幕井下补幕堵漏工程，通过帷幕区水文地质分析、帷幕钻孔资料分析、放水试验、瞬变电磁探测和连通试验等方法，提出一种帷幕薄弱区综合分析方法，在此基础上确定补幕注浆治理的范围，提出合理的井下钻孔设计和注浆方案，并取得理想的治理效果。实践表明，这种方法能有效减少注浆治理的盲目性，降低治理成本，保证注浆治理效果，对类似工程具有一定的借鉴意义。

A COMPREHENSIVE ANALYSIS METHOD FOR SEARCHING WEAK ZONES OF GROUTING CURTAIN IN MINES

In the prevention and control of water hazards in mines，grouting curtain is widely used as a useful method to prevent water seepage. With the increases in mining depth and the service life of curtain，the capability of curtain to prevent water is reduced. Taking curtain repairing project of Zhangmatun iron mine for example，the hydrogeology analysis，dewatering test，transient electromagnetic exploration and connection test were carried out to find the weak zones of the curtain. A comprehensive analysis method to find the weak zones of the curtain was proposed. The range of grouting treatment was determined；and reasonable borehole design and grouting scheme were proposed，which bring in a good treatment effect. Practice shows that this method can provide certain reference for similar projects.