曹四夭钼矿大口径水文地质孔施工工艺

Construction Technology of Large Diameter Hydrogeology Holes in Caosiyao Molybdenum Mine

摘要:

在曹四夭钼矿3个大口径水文地质孔的施工中，解决了上部大口径施工完成后要变径应用常规岩心钻探正常钻进的问题；大口径施工过程中保证钻孔垂直度的问题；在水文地质孔施工中禁止使用高分子护壁堵漏材料情况下，保证钻孔顺利施工到设计深度的问题等。介绍了针对这些问题的技术措施。

Abstract:

In the construction of 3 large diameter hydrogeology holes in Caosiyao molybdenum mine, normal construction by conventional core drilling with reducing diameters after upper large diameter drilling, borehole verticality ensuring in the large diameter hole construction and the borehole of designed depth being smoothly completed with prohibition of polymer plugging material in hydrogeology hole construction were all realized. The paper introduces the related technical measures.