摘要:随着我国对深部地质资源勘探开发的不断深入，深部矿藏已成为地质找矿工作的重点。在深部找矿钻探过程中，高陡构造地层直井段保直问题，是一直困扰钻井技术人员的一个主要难题，严重影响深部矿藏的勘探效率。在易发生井斜段，单弯双稳螺杆钻具是最常用的防斜纠斜钻具组合。本文基于纵横弯曲梁法和平衡趋势原理建立底部钻具组合力学模型，通过模型分析各个因素对纠斜能力的影响规律，结合正交试验设计方法，确定主控因素；最后，基于多目标优化理论，建立防斜打快钻井控制参数多目标优化方法，获取最优参数组合。基于上述研究，形成一套防斜打直优化设计方法，提高高陡构造地层直井段钻探效率，推动深部矿藏的高效、低成本钻探和开发。

摘要:Anti-torque device with high torque is one of the main parts of the electromechanical coring tools of armored cable type for sub-glacial bedrock drilling, the failure of this device will cause the drilling process ceasing, even will lead to the drill falling off and other drilling accidents. The experimental stand of anti-torque device for armored cable assembly is designed; the paper introduces in detail the design concept, design principle, main structure parameters and the preliminary experimental results. This experimental stand can test the anti-torque of the anti-torque device in any combination with ice of different temperature and borehole of different diameter, and can show the sliding down resistance. The preliminary experiments verify that the experimental stand works well, and it can provide an important basis for the better selection of anti-torque device type and optimal operation parameters.

摘要:后插筋旋喷桩 -灌注桩复合式基坑支护结构是根据实际工程需要设计出的一种新型结构 ,具有抗弯能力强、止水效果好、造价低廉和施工方便等优点 ,具有很好的应用前景。提出了该基坑支护结构截面抗弯计算的力学模型和设计计算方法。