为提高岩溶隧道中地质预报的准确性，通过对方解石与岩溶、断层及地下水的产出特征变化研究以及其含量变化统计，通过现场的统计分析及追踪调查表明，在隧道施工中可以根据方解石的含量变化及产出特点再结合物探方法来推测隧道掌子面前方的地质情况。主要结论如下： 1）根据方解石的产出特征规律结合物探方法能识别出前方即将出现的地质异常体； 2）地质预报工作需要地质方法和物探方法相结合，才能取得准确判释； 3）在地质学上，通过对微观现象的统计整理，再对其进行分析研究，可以对宏观构造现象的判断起到帮助作用。

The relationship among calcite and characteristics of karst, fault zone and ground water are studied, so as to improve the accuracy of geological prediction in construction of karst tunnels. The geological prediction method, which is based on the analysis on the content and characteristics of calcites and the application of geophysical prospecting technology, is proposed. Conclusions drawn are as follows: 1) Anomalous bodies can be detected by means of analyzing the characteristics of calcite, under the help of geophysical prospecting technology. 2) Geological technology and geophysical prospecting technology are needed in geological prediction so as to achieve accurate prediction results. 3) With the help of statistics of and studying on micro phenomenon, macroscopical structures can be detected.