【作者】 王洪涛；

【导师】 毛君； 谢苗；

【作者基本信息】 辽宁工程技术大学 ， 机械工程， 2019， 硕士

【摘要】 为解决我国综掘巷道掘进效率低下问题,课题组提出一种集掘进、铲运、支护和锚固四大功能于一体的掘支锚机组装备。本文以其申请的发明专利“一种迈步式掘支锚联合机组及其使用方法”(专利号:ZL201810959282.6)综掘装备结构为基础,对其进行结构改进,获得一种双截割部式掘支锚机组设备,本文主要对该设备在水平横摆截割工况下整机动力学问题进行研究。本课题得到国家自然科学基金面上项目“迈步行走主动激振式掘支一体机截割载荷特性及其优化控制研究”(基金号:51874158)的大力支持。首先以岩石力学为基础,对截齿、截割头在截割过程中的受力情况进行理论探究,获得两个完全对称结构截割头载荷特征,并借助于Abaqus软件对不同截割过程进行数值模拟,获得截割头三向受载时程曲线,为后期整机动力学分析奠定基础。然后以水平横摆截割工况下的单截割部式掘支锚机组为研究对象,在假设与简化基础上,建立机组X向十一自由度动力学模型,以拉格朗日方程为基础,采用能量法列出各部件振动微分方程,以获得到的截割头载荷作为激励,采用四阶Runge-Kutta方法,借助于MATLAB软件对其进行求解。通过对仿真结果进行分析得知,各部件振动幅度较大,对巷道围岩的稳定性、机组关键部件的可靠性产生较大的影响,并且内支撑组部件还存在偏振问题。最后对上述存在的问题进行剖析,提出一种双截割部式掘支锚机组,在假设与简化基础上,分别建立双截割部式掘支锚机组X向十四自由度动力学模型和Z向八自由度动力学模型,并列出其对应的各部件振动微分方程。通过激励输入不同来分别模拟机组水平横摆过程中的平衡工况和不平衡工况。通过对双截割部式掘支锚机组机组X向动力学方程进行求解并分析发现:两种工况下双截割部式掘支锚机组件X向振动情况相对于单截割部式掘支锚机组X向振动更加稳定,机组工作性能良好;平衡工况下双截割部式掘支锚机组不存在偏振问题,不平衡工况下机组还存有一定偏振问题,但相比于单截割部式掘支锚机组横摆过程,偏振问题有所改善,说明双截割部式掘进机构的提出可以有效解决机组横向截割时存在的偏振问题。通过对双截割部式掘支锚机组Z向动力学方程进行求解并分析发现:机组各部件振动位移较小、振动较稳定,不会对巷道围岩和机组关键部件的可靠性产生较大的影响,支护效果良好,说明双截割部式掘支锚机组Z向结构设计较为合理。通过对两种水平横摆截割工况下各部件振动情况进行探究,发现双截割部式掘进机构在掘支锚机组上应用效果良好,说明双截割部式掘支锚机组的提出具有一定可行性。该论文有图34幅,表5个,参考文献59篇。更多还原

【Abstract】 In order to solve the problem of low efficiency of roadway excavation in China,the research group proposed a four-function excavation,anchoring and anchoring equipment.In this paper,based on the invention patent “a kind of step-and-shoulder anchor combined unit and its use method ”(patent number: ZL201810959282.6),the structure is improved and a double cutting section is obtained.This paper mainly studies the dynamics of the whole machine under the condition of horizontal yaw cutting.This topic has received strong support from the National Natural Science Foundation of China,“ Study on the Cutting Load Characteristics and Optimized Control of the Actively Excited Excavation and Clamping Machine”(Fund No.:51874158).Firstly,based on rock mechanics,the force of the cutting and cutting head during the cutting process is theoretically explored,and the load characteristics of two completely symmetrical structural cutting heads are obtained,and different cutting processes are performed by means of Abaqus software.Numerical simulation,the three-way load-time curve of the cutting head is obtained,which lays a foundation for the dynamic analysis of the whole machine.Then,the single-section section anchoring anchor unit under horizontal yaw cutting condition is taken as the research object.Based on the assumption and simplification,the X-direction eleven-degree-of-freedom dynamic model of the unit is established,and the Lagrange equation is used.Based on the energy method,the vibration differential equations of each component are listed to obtain the cutting head load as the excitation.The fourth-order Runge-Kutta method is used to solve the problem by means of MATLAB software.Through the analysis of the simulation results,it is found that the vibration amplitude of each component is large,which has a great influence on the stability of the surrounding rock of the roadway and the reliability of the key components of the unit,and the polarization of the inner support group components.Finally,the existing problems are analyzed,and a double-cutting section anchoring anchor unit is proposed.Based on the assumption and simplification,the X-direction four-degree-of-freedom dynamic model of the double-cutting section anchoring unit is established.The Z-direction eight-degree-of-freedom dynamics model is listed and its corresponding vibrational differential equations for each component are listed.The balance conditions and unbalanced conditions during the horizontal yaw of the unit are simulated separately by different excitation inputs.The X-direction dynamic equation of the double-cutting section anchoring unit is solved and analyzed.It is found that the X-direction vibration of the double-cutting section anchoringmachine assembly under two working conditions is compared with the single cutting section.The X-direction vibration of the anchoring unit is more stable and the unit has good working performance;Under the balanced working condition,there is no polarization problem in the double-cutting type excavation anchoring unit.Under the unbalanced working condition,the unit still has a certain polarization problem,but the polarization problem is compared with the yaw process of the single cutting section type anchoring anchor unit.Improvements have been made,indicating that the proposed double-cutting type tunneling mechanism can effectively solve the polarization problem existing in the transverse cutting of the unit.Through solving the Z-direction dynamic equation of the double-cutting section anchoring and anchoring unit,it is found that the vibration displacement of the components of the unit is small and the vibration is stable,which will not cause great reliability to the surrounding rock of the roadway and the key components of the unit.The effect of the support is good,indicating that the Z-direction structure design of the double-cutting section anchoring anchor unit is reasonable.Through the exploration of the vibration of each component under two horizontal yaw cutting conditions,it is found that the double cutting section type tunneling mechanism has a good application effect on the excavation anchoring unit,indicating that the double cutting section type excavating anchoring unit has Certainly feasible.更多还原