针对煤矿井下锚固钻孔作业精度低、振动量大等问题，以掘进机配套式锚固群组为研究对象，构建锚固群组动力学数学模型，得到锚固群组各部件时域与频域响应特征；利用动力学软件对锚固群组进行刚柔耦合动力学求解和特性分析，研究伸缩架在缩回/伸出状态下，锚固群组关键部件的振动特性及力学特性分析。结果表明：小刚度大变形钻杆与支腿式底座振动半径相对较大，振动效果明显；钻机组件与固定伸缩架在振动过程中整体稳定性良好；由于伸缩架在伸出状态下为短机身大跨度结构，各部件的振动运动参数及力学参数要普遍大于缩回状态；通过锚固群组样机钻孔试验，获得系统实际振动模态数值，利用相关振动检测系统测量，验证关键部件钻进振动特征理论分析可靠性，可将获得的参数信息可用于指导关键部件结构强度设计及钻杆自动定位技术理论基础。
Abstract
Aiming at the problems of low accuracy and large vibration of underground anchoring drilling operation in coal mine, taking the supporting anchoring group of roadheader as the research object, the dynamic mathematical model of anchoring group is constructed, and the response characteristics of each component of anchoring group in time domain and frequency domain are obtained; The dynamic software is used to solve the rigid flexible coupling dynamics and analyze the characteristics of the anchor group, and to study the vibration characteristics and mechanical characteristics of the key components of the anchor group when the telescopic frame is retracted / extended. The results show that the vibration radius of drill pipe and outrigger base with small stiffness and large deformation is relatively large, and the vibration effect is obvious; The overall stability of drilling rig components and fixed beams is good during vibration; Because the telescopic frame is a short fuselage and long-span structure in the extended state, the vibration motion parameters and mechanical parameters of each component are generally greater than those in the retracted state; Through the drilling test of the anchor group prototype, the actual vibration mode value of the system is obtained, and the relevant vibration detection system is used to measure and verify the reliability of the theoretical analysis of the drilling vibration characteristics of the key components. The obtained parameter information can be used to guide the structural strength design of the key components and the theoretical basis of the automatic positioning technology of the drill rod.
关键词
锚固群组 /
刚柔耦合 /
振动特性 /
力学特性
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Key words
anchor group /
rigid flexible coupling /
vibration characteristics /
mechanical properties
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