隧道穿越大型断裂地段, 断层的富水性对隧道工程建设的安全性有较大影响。应用物探方法对大型断裂富水 性进行勘探, 将有效预防施工过程中出现突水等安全事故。以山西的古城井田隧道建设前期勘探为例, 采用可控震 源浅层地震勘探技术对断层的结构进行了分析、解释, 准确掌握了隧道穿越地堑区域的地质构造、岩性; 利用频率域 电磁测深法调查了工作区内断层的充水、导水情况及二叠系砂岩水、奥陶系灰岩水的赋存情况、岩溶裂隙程度等; 最 后综合两种物探方法, 分析得出断层的充水来源和导水性质。

The tunnel passes throug h the larg e fault, and the wat er2r ich conditions o f the fault can have gr eat impacts o n the safe2 ty of tunnel const ruct ion. In or der to prevent the occur rence of w ater inrush dur ing the const ruct ion, the water2rich co ndit ions of lar ge fault ar e investig ated using the g eo phy sical pr ospecting method. In this paper , the preliminary ex plor ation o f tunnel con2 str uction in the Gucheng mine of Shanxi Pro vince was taken as an ex ample. T he fault str ucture w as analy zed by the contr olled2 so ur ce shallow seismic technique, which can pr ovide the geo lo gical structur e and litholog y of the ar ea w here the tunnel passes. The frequency domain electromagnetic so unding metho d w as used t o inv estig at e the w ater2 rich co nditions and hydraulic conduc2 tivit y of the fault, the sto rag e co ndit ions of Permian sandstone water and Or do vician limestone w ater, and karst fracture condi2 tions. The source fo r water2rich conditions and hy dr aulic propert ies o f t he fault w ere analyzed by the abov e two g eophysical techniques.