【作者】 李刚； 殷琨； 彭枧明；

【Author】 Li Gang Yin Kun Peng Jianming (Jilin University)

【机构】 吉林大学；

【摘要】 河南栾川钼矿地层为典型的硬、脆、碎地层,勘探钻进工作采用贯通式潜孔锤反循环钻进技术,在钻进过程中,常发生反循环钻头损坏现象。通过LS-DYNA软件对钻头进行有限元分析,确定损坏原因,认为钻头尾部端面面积过小无法满足潜孔锤活塞高速冲击产生的巨大冲击力是损坏的根本原因。对钻头进行优化设计并进行有限元分析,通过分析钻头尾部应力情况,认为新钻头结构设计合理,将新钻头应用于施工现场,解决施工难题。更多还原

【Abstract】 The stratum at Luanchuan Molybdenum Mine in Henan province is hard,brittle,broken,so Hollowthrough DTH hammer Reverse-Circulation-Drilling technology through is used in exploration drilling work,the reverse circulation bit during the drilling was usually broken.FEA on the bit by LS-DYNA is used to the cause of broken.The results indicate that the rear face area of bit is too small to meet the high impact force since DTH impact in high-speed is the essential cause to make broken.Then optimize bit design and FEA on the new bit,the new structure designed of bit is rational by analysis the stress of bit end,the new designed bit is applied in field drilling to solve some difficulties.更多还原