复杂富水环境下帷幕注浆工程布设及工艺优化

帷幕注浆工程可以有效截断开采区域的地下水补给,为安全开采复杂富水环境下的矿体创造条件。在对矿区水文地质环境详细勘察的基础上,通过现场工业试验,以堵水率为评价指标,分析注浆工程在不同帷幕线路和注浆参数下的堵水效果。通过优化帷幕注浆线路和布设参数,采用分区不等距大孔距布设注浆孔的方式,降低了36.01%的钻探工程量;遴选了改性黏土固化浆(90%)和粉煤灰固化浆(10%)作为注浆材料,降低了帷幕工程成本。研究结果表明:注浆帷幕两侧的水位差最高达40.6 m,堵水率达77.96%,帷幕注浆工程达到了预期堵水效果。

Curtain Grouting Layout and Process Optimization under Complex Water-rich Environment

Curtain grouting can effectively cut off the groundwater recharge in exploitation areas，which creates conditions for the safe mining of ore-body under complex water-rich environment.Based on the detailed investigation on hydrogeological environment in mining area，water plugging effect of the curtain grouting under different curtain lines and grouting parameters were analyzed through the industrial tests，with the water plugging rate as index.By optimizing the lines and layout parameters of curtain grouting，drilling volume was reduced by 36.01% through the layout of unequal-spacing and wide-spacing holes.Modified solidified cured slurry (90%) and pulverized coal ash solidified slurry (10%) as grouting material reduced the costs of curtain project.The results show that the maximum water level difference on both sides of the curtain was up to 40.6m，and the plugging water rate reached 77.96%.Curtain grouting project gained the desired water plugging effect.