The modem karst formation started in the old Tertiary Period, and matured in the Quatemary Period.
现代岩溶的形成开始于老第三纪，成熟于第四纪。
The study on regional karst hydrogeochemistry is the base for researching karst formation, karst hydrogeology and environmental geology.
区域岩溶水文地球化学研究是深入开展岩溶的形成、岩溶水文地质和环境地质工作的基础。
The principle of reaching balance drilling and under balanced drilling using foam mud in water well drilling in Karst formation was presented.
分析了岩溶地层水文水井施工中，泡沫实现平衡压力或欠平衡压力钻井的原理及影响泡沫钻井有效井眼压力的因素。
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