日本有许多软弱火山岩体、断层及破碎岩体,这是由于地震及火山活动频繁所造成的.此外,地下水及温泉渗透到岩体的逢隙中,加速岩石风化变质的情况也很多.日本在处理这类岩体,在这类岩体上建造构筑物以及开采矿物资源方面具有高度的技术水平,到目前为止完成了许多世界闻名的大工程.然而,社会经济条件对技术发展的要求是没有止境的.例 Japan has many weak volcanic rock masses, faults and broken rock masses, which are caused by frequent earthquakes and volcanic activities. In addition, underground water and hot springs penetrate into the gaps in the rock mass, accelerating the weathering of rocks. There are also many cases in Japan. Dealing with such rock masses, building structures on such rock masses and mining mineral resources have a high level of technology. So far, many world-famous projects have been completed. However, the requirements of socio-economic conditions for technological development are endless. Example