Carbonate rock is widely distributed in china both in depth and in area . a large number of tunnels are excavated and built in it . carbonate rock is distinguished from the other fracture rock in that most of it has bored hydro - chemical and hydraulic erosion in groundwater environment 我国境内碳酸岩层分布纵深横广，大量的隧道及地下工程修建于可溶岩中，而可溶岩和一般岩体的本质区别在于其受过地下水物理、化学环境的改造。
