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钻井法是用钻头破碎岩石,用洗井液进行洗井排渣和护壁,当井筒钻至设计直径和深度以后,在洗井液中进行支护的机械化凿井方法(图1)。钻井法实现了全部凿井工序在地面进行,大大减轻凿井工人的劳动强度,工作安全,施工质量好。 钻井法已有百余年的历史,我国于1969年首次采用钻井;法钻凿煤矿立井获得成功,至今已钻凿30个矿山立井井筒。 钻井法凿井技术可应用于任何地层。但就其技术经济效益来看,目前仍以钻进表土地层时效果最佳。在井筒直径小和岩层较软
Drilling is a method of rock breaking with a drill bit, washing out of wells with washings, slagging and retaining walls, and mechanical sinking in well washings when the wellbore has been drilled to a design diameter and depth (Figure 1). Drilling method to achieve all the shaft sinking process carried out on the ground, greatly reducing the labor intensity of workers sinking, work safety, construction quality. Drilling has been a hundred years of history, the first time in China in 1969 drilling; method of drilling coal mine shaft success, so far has been drilled 30 mine shaft shaft. Drilling Shafting technology can be applied to any formation. However, in terms of its technical and economic benefits, it is still the best when drilling into the topsoil. In the wellbore diameter and rock formation is relatively soft