《四川中小型水工隧道掘进专集》出版 ,它是四川省探矿工程、岩土钻掘工程专业科技进步的体现。四川 4 0 5建设工程公司 (前身为四川地矿局 4 0 5地质队 ) ,主要从事地质找矿工作 ,建队后至 1 990年间 ,已完成地质隧道工程量 6 36 0 0ｍ余。随着改革开放的深化 ,受到市场经济浪 “Sichuan small and medium-sized hydraulic tunneling album,” published, it is Sichuan Province prospecting engineering, rock and soil drilling engineering science and technology reflect the progress. Sichuan Construction Engineering Company (formerly Geological Team of Sichuan Bureau of Geology and Mineral Resources), which is mainly engaged in geology prospecting work, completed a total of 6,360,000 tons of geological tunneling works from 1949 to 1949. With the deepening of reform and opening up, by the market economy wave