煤矿井下钻孔封孔技术自动化程度不足，采用自动定向钻机协助封孔可提高封孔自动化程度。设计了一种自动定向钻机用双摩擦力胶体卡瓦，以解决自动定向钻机夹持器夹坏封孔器的问题；提出了2种胶体结构，实现了主动钻杆接扣与退扣2个过程摩擦力差异化，确保钻机顺利加接封孔器。采用非线性有限元法，选用Mooney-Rivlin应变能函数表征胶体力学性能，开展了胶体夹持封孔器仿真，得到了不同材料胶体的工作摩擦力，验证了2种结构胶体的合理性，研究了胶体表面胶条压缩量对封孔器应力的影响，探究了胶体表面胶条数量对胶体轴向摩擦力的影响。结果表明：天然橡胶与聚氨酯橡胶作为胶体材料是合理的，胶条压缩量宜为0.9 mm、胶条数量宜为3条。

The automation degree of sealing technology in coal mine is insufficient, and the automatic directional drilling rig can improve the automation degree of sealing. A colloidal slip with double friction force for automatic directional drilling machine is designed to solve the problem that the clamping device of automatic directional drilling machine is bad. Two kinds of colloidal structures are proposed to realize the difference of friction between active drill pipe jointing and unjointing, and to ensure the smooth jointing of drill pipe. Using the nonlinear finite element method, Mooney-Rivlin strain energy function was used to describe the mechanical properties of colloid, and the simulation of colloid clamping hole sealer was carried out. The working friction of colloid of different materials was obtained, and the rationality of the two structural colloids was verified. The influence of the compression amount of adhesive strip on the surface of the colloid on the stress of the hole sealer was studied. The effect of the number of adhesive strips on the colloidal surface on the axial friction force was investigated. The results show that natural rubber and polyurethane rubber are reasonable as colloidal materials, the compression of rubber strips is 0.9 mm, and the number of rubber strips is 3.