Wang Yonglong, Zhao Aoqi, Yu Zaijiang, Guo Jiakuan, Du Kang, Ma Denghui
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo 454003, China.
ACS Omega. 2024 Dec 19;10(1):1388-1400. doi: 10.1021/acsomega.4c08972. eCollection 2025 Jan 14.
In order to solve the problem of drilling deflection, the method of cutting drilling by layers is proposed. The mathematical model of the force of the layered cutting bit was established, and the influencing factors of bit deflection were obtained. The stress equation of the cutting bit is constructed, and the ABAQUS numerical model is established. The influencing factors of the deflection of the bit are analyzed. A comparative industrial test was carried out in the Tunlan Mine. The analysis results show that the main influencing factors of bit deflection are the tangential force on bit , the axial force on bit , the length of the straightener rod , the elastic modulus of the surrounding rock , the length of the straightener bit and reaming bit , and the diameter of the drilling hole . When the axial force on the bit is between 120 and 220 KN, the change of axial force has almost no effect on the deviation angle of the drill hole. The change of and is linearly negatively correlated with the bit deviation angle between 50 and 300 mm. Compared with the conventional drill, the horizontal deviation and vertical deviation of the layered cutting bit are reduced by 23% and 43% on average, respectively.
为解决钻孔偏斜问题，提出了分层切削钻进方法。建立了分层切削钻头受力的数学模型，得出了钻头偏斜的影响因素。构建了切削钻头的应力方程，建立了ABAQUS数值模型。分析了钻头偏斜的影响因素。在屯兰矿进行了对比工业试验。分析结果表明，钻头偏斜的主要影响因素有钻头切向力、钻头轴向力、扶正杆长度、围岩弹性模量、扶正钻头和扩孔钻头长度以及钻孔直径。当钻头轴向力在120～220kN之间时，轴向力的变化对钻孔偏斜角几乎没有影响。在50～300mm范围内，和的变化与钻头偏斜角呈线性负相关。与传统钻头相比，分层切削钻头的水平偏差和垂直偏差平均分别降低了23%和43%。
