解放前我国地质勘探工作的基础十分薄弱，当时探矿工程手段仅有十多台旧式钻机，除间或进行少量的地表剥离工程外，根本谈不到采用系统的坑探工程。解放后根据地质勘探的需要，在地质、冶金、煤炭、二机、建材、化工、水电、铁道、交通等部门，都逐步地采用了坑探工程，作为地质矿产普查勘探和工程地质勘察的主要手段之一。由于坑探工程能使地质人员深入矿体和围岩，直接进行观察与研究，能根据矿床产状的变化，追索矿体，准确采取样品，质量可靠。因此，往往用较少的 Before liberation, the foundation of China’s geological exploration work was very weak. At that time, there were only about a dozen or so old drilling rigs in prospecting engineering. There was absolutely no systematic exploration of the scuttling project except for a few surface stripping projects during the liberation. After the liberation, according to the needs of geological exploration, the geotechnical, metallurgical, coal, two machines, building materials, chemicals, hydropower, railways, transportation and other departments, have gradually adopted the pit exploration project, geology and mineral prospecting exploration and engineering geological survey as the main One of the means. As the pit exploration project enables geologists to go deep into the ore body and the surrounding rock, direct observation and research can recover the ore body according to the changes in the occurrence of the deposit, and accurately take the samples with reliable quality. Therefore, often with less