巷道掘进支锚作业平台锚护基础机理研究

发布时间：2018-05-23 22:20

本文选题：巷道掘进支锚作业平台 + 静力学分析　；参考：《安徽理工大学》2017年硕士论文

【摘要】：随着煤矿采掘速度的提高,煤巷快速、安全的支护成为进一步推动煤炭采掘机械化的重要环节。由于传统的U形棚支护成本高、工人作业强度大、可靠性差,已经不能满足煤炭生产机械化进程和高效高产的实际需求,锚杆支护以其操作方便、劳动强度低、支护可靠性高、支护成本低等优势,已经成为现阶段煤巷支护的主流。目前,综掘工作面锚杆钻机一般与掘进机配合作业,一般是机载锚杆钻机加载于掘进机之上两者相互配合协同作业,但是机载锚杆钻机的加载易遮挡掘进机司机的视线,存在一定安全隐患;另外,机载锚杆钻机的加载增加了掘进机的重量,增大了掘进机卧底可能性。基于以上情况,本文提出的巷道支锚作业平台,可以有效解决上述问题。首先对巷道支锚作业平台的作业原理进行阐述,校核了若干承重部件的结构强度,主要分析了作业平台、主梁、作业平台支撑摇臂等在承受负载情况下的强度。根据巷道支锚作业平台总体参数及各零部件动作顺序,设计改进了作业平台支腿、平台主板、平台链接机构、液压抽屉、液压支腿,分析研究了机载锚杆钻机的结构,了解钻机各部分功能,并对锚杆钻机、液压马达进行选型设计。分析了锚杆钻机的作业原理,建立了锚杆钻机纵向运动模型以及纵向振动运动学方程,计算了钻柱纵向振动固有频率,利用ANSYS软件对钻柱的纵向振动特性进行分析,为钻柱稳定性研究提供参考。研究了钻柱扭转振动形式,建立钻柱扭转振动的物理简化模型,建立钻柱扭转振动的数学模型,并且计算钻柱的临界转速和扭转振动的固有频率。利用有限元软件分析了钻柱的扭转振动特性,分析了钻柱横截面积、钻柱长度对其扭转特性影响,为钻柱的扭转振动特性研究提供参考。
[Abstract]:With the increase of coal mining speed, coal roadway is fast, and safe support becomes an important link to further promote coal mining mechanization. Because of the high cost of the traditional U-shaped shed support, the heavy working intensity and the poor reliability of the workers, it has been unable to meet the actual demand of mechanization of coal production and high efficiency and high yield. The bolt support is easy to operate, low labor intensity and high reliability of the support. Low support cost and other advantages have become the mainstream of coal roadway support at this stage. At present, the fully mechanized excavating face anchor drill generally works with the roadheader, usually the airborne anchor rig loaded on the roadheader works in cooperation with each other, but the loading of the airborne anchor drill is easy to block the sight of the driver of the roadheader. In addition, the loading of airborne anchor drill increases the weight of roadheader and increases the possibility of underground roadheader. Based on the above situation, the roadway support and anchor platform proposed in this paper can effectively solve the above problems. Firstly, the working principle of roadway support and anchor working platform is expounded, and the structural strength of some load-bearing parts is checked, and the strength of the working platform, main beam and supporting rocker arm of the working platform under load is mainly analyzed. According to the general parameters of roadway support and anchor working platform and the action sequence of each part, the supporting leg, platform main board, platform link mechanism, hydraulic drawer, hydraulic support leg are designed and improved, and the structure of airborne anchor drill is analyzed and studied. To understand the various functions of drilling rig, and anchor drill, hydraulic motor type selection design. The working principle of anchor drill is analyzed, the longitudinal motion model and kinematics equation of longitudinal vibration are established, the natural frequency of longitudinal vibration of drill string is calculated, and the longitudinal vibration characteristic of drill string is analyzed by ANSYS software. It provides a reference for the study of drill string stability. The form of string torsional vibration is studied, the physical simplified model of drill string torsional vibration is established, the mathematical model of drill string torsional vibration is established, and the critical speed of drill string and the natural frequency of torsional vibration are calculated. The torsional vibration characteristics of drill string are analyzed by using finite element software. The effects of drill string cross-sectional area and drill string length on the torsional vibration characteristics of drill string are analyzed, which provides a reference for the study of torsional vibration characteristics of drill string.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD353.6

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