多水矿山地下采矿注浆堵水技术及案例分析

涌水量特别大、水文地质条件复杂的矿山不适合采用先疏干、后采矿的传统技术。通过地下矿山防治水技术研究与开发，采用坑内近矿体顶板灰岩注浆堵水技术进行治理涌水问题，取得了较好的成效。该技术的总体思路是对近矿体顶板灰岩岩溶裂隙充塞、密实，将灰岩连接加固形成隔水层，使之形成平行与矿体的倾斜隔水帷幕，防止地下水进入采场。本研究结合实例分析多水矿山地下采矿注浆堵水技术的设计思路、实施方法和应用成效。根据矿床、矿体和矿物特征和矿区水文地质条件，论述了工程布置和钻探注浆工程量统计方法，解析了注浆层安全厚度的确定、顶板注浆堵水工艺设计、注浆方式和注浆段高、压水试验、注浆顺序、注浆参数等注浆技术参数等确定原则和方法。

Grouting Water Plugging Technology of Underground Mining for Water-rich Mine and the Related Case Analysis

The traditional technology of drainage before mining is not applicable for the mine with large water inrush and complicated hydrogeological conditions.Through deep research and development of underground mine water prevention and control technique,roof limestone grouting water plugging technology near ore-body in pit to control water,achieved good results.The general idea of this technique is that limestone filling and compacting the karstic roof fissures near ore-body can connect the limestone to form water-resisting layer.By this method, an inclined waterproof curtain in parallel with the ore bodies is formed to prevent the groundwater flowing into the stope.Combining with the case,the design concept,implementation method and application effect of the grouting water plugging technology for water-rich underground mining are analyzed.According to the properties of ore deposits,ore body and minerals and its hydrogeological conditions in mining area,the engineering arrangement and statistical methods for drilling and grouting volume are demonstrated,and the principles and methods of determining grouting technical parameters,such as the safe thickness of grouting layer,water plugging process design of roof grouting,grouting method,grouting sublevel height,high pressure water test,grouting sequence and grouting parameters,etc.are analyzed.