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在竖井延深中普遍采用反井吊笼法施工,此法施工条件差、不安全,而平顶山矿务局四矿副井第一水平延深至第二水平,则采用XB——1000型钻机钻出直径700毫米的大钻孔,进行排矸泄水的施工方法。这种施工方法具有施工条件好、安全性高等优点。 为了钻出直径700毫米的大钻孔,我们对钻机能力,钻杆强度等进行了核算,并与平顶山矿务局地测处共同研制了中心导孔钻具和扩孔钻具。 一、工程地质条件 平局四矿副井净径6米,现已生产的第一水平标高±0,第二水平标高为-265米,辅助
Construction of inverted shaft cage method is widely used in deep shaft extension. This method has poor construction conditions and is unsafe. However, the first level of auxiliary shaft of No.4 Mine in Pingdingshan Mining Bureau is deepened to the second level. The XB - 1000 drilling rig Drill a large hole diameter of 700 mm, drainage row of drainage construction methods. This construction method has the advantages of good construction conditions and high safety. In order to drill a large bore hole with a diameter of 700mm, we calculated the drilling rig capacity and drill pipe strength, and jointly developed the pilot hole drilling and reaming drillings with the Geological Survey Office of Pingdingshan Mining Bureau. First, the engineering geological conditions Draws a four-meter auxiliary shaft net diameter of 6 meters, is now the first level elevation ± 0, the second horizontal elevation of -265 meters, supporting