浅析岩溶地区深孔帷幕灌浆钻孔弯曲机理及预防措施

Borehole bending mechanism and precautions of deep curtain grouting in karst area

以岩溶地区某铅锌矿为防止矿区外侧河流地下水渗入矿井而采取的帷幕灌浆防渗试验中的钻孔弯曲为例,论述了钻孔弯曲的机理和危害性,分析了引起钻孔弯曲的地质因素和施工技术因素,总结了岩溶矿区超深帷幕钻孔偏斜的防洪措施,并提出了合理的解决方案。

In order to prevent seepage from exterior river into a lead-zinc mining zone in karst area,curtain grouting test was conducted and borehole bending occurred.Taking this bending as example,the author discussed the mechanism and harm of borehole bending,analyzed the geological factors and construction technology which may lead to bending,summarized the flood protection measures for super deep curtain grouting borehole oblique in karst mining area,and put forward rational solution.