老厂锡矿是一个老矿山,矿藏资源丰富,矿体盘根错节,形态复杂。解放后,由于历史遗留的问题,上部资源尚未探清,边探边采,有些矿体开采后又发现上部还有矿体,有些则在地表还有砂矿。例如5~#矿体采后形成一个较大的采空区,上部周围尚有9--2矿带等几个矿体;3~#矿体也已是一个较大的采空区,地表有砂矿复盖。如何掌握岩移规律,保护国家资源,在采空区上部进行勘探和开采这些矿体和砂矿。这是矿山技术政策中的一个重要问题。特别是在勘探和开采时要有充分的安全措施。 Old tin factory is an old mine, rich mineral resources, ore-bearing complex, complex forms. After the liberation, due to the problems left over by history, the upper resources have not yet been explored, while exploration and exploitation. Some ore bodies are also found in the upper part after mining and ore bodies, while others have surface sand deposits. For example, 5 ~ # ore body after mining to form a larger goaf, the upper part there are 9-2 ore belt and several ore bodies; 3 ~ # ore body is also a larger goaf, the surface Sand cover. How to master the law of rock migration, protect national resources, and conduct exploration and exploitation of these ore bodies and sand mines in the upper part of the goaf. This is an important issue in mine technology policy. In particular, adequate safety measures must be taken during exploration and exploitation.