Xinzhuang Coal Mine, Qingyang Xinzhuang Coal Industry Co. , Ltd.
Huaneng Coal Technology Research Co. , Ltd.
College of Mechanical Engineering, Liaoning Technical University

为保证巷道快速掘进系统的安全、稳定、高效进行,钻机锚固单元的结构强度及设计合理性至关重要;首先根据实际工况条件,构建锚固单元钻进过程力学模型,得到钻杆钻进阻力及阻力矩相互关系;利用Ansys对锚固单元结构强度进行可靠性分析,验证结构设计合理性;通过构建钻进过程钻杆振动学模型,利用Abaqus分析锚固单元在有预应力下的模态规律,与Matlab联合求解钻进过程横向振动位移、速度及加速度,验证钻杆钻进不同岩层时,其速度、加速度可作为判别煤岩属性的数值特征;利用DesignExploer优化模块对锚固单元结构进行优化,优化后的锚固单元在保证应力、形变及共振频率皆满足要求情况下,质量降低了6.24%,实现了锚固单元结构的优化;通过锚固钻进相似试验验证,可得到优化后的锚固部件满足强度要求;钻进不同围岩时,锚固钻进钻杆振动响应明显,该结论可作为煤岩识别的理论基础,为实现自动锚固提供先行条件。

In order to ensure the safety, stability and efficiency of the rapid tunneling system, the structural strength and design rationality of the anchor unit are crucial. Firstly, according to the actual working conditions, the mechanical model of the drilling process of the anchoring unit is established, and the relationship between the drilling resistance and the resistance moment is obtained. The reliability of the structural strength of the anchor unit is analyzed using Ansys, and the rationality of the structural design is verified. By constructing the drill pipe vibration model in the drilling process, using Abaqus to analyze the modal law of the anchor unit under the prestress, and combining with MATLAB to solve the lateral vibration displacement, velocity and acceleration in the drilling process, it is verified that the velocity and acceleration of the drill pipe can be used as the numerical characteristics to judge the coal and rock properties when drilling in different rock layers. The structure of the anchor unit is optimized using the DesignExploer optimization module. The quality of the optimized anchor unit is reduced by 6. 24% under the condition that the stress, deformation and resonance frequency meet the requirements, and the optimization of the anchor unit structure is realized. Through the similar test of anchor drilling, the optimized anchor parts can meet the strength requirements. When drilling in different surrounding rocks, the vibration response of the drill rod for anchor drilling is obvious. This conclusion can be used as theoretical basis for coal rock identification, and provide the precondition for automatic anchor.

国家自然科学基金项目(51874158,51904142)

巩永春, 孙晓虎, 李伟东, 等. 锚固钻机力学特性分析及参数优化设计 [J]. 煤炭工程, 2023, 55(7): 126-132.