【作者】 杨洋；

【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】 对煤层厚度分布情况的勘探能有效预防事故的发生和提高煤炭的产出量,煤矿井下常用的勘探方式是通过勘探钻机对煤层进行钻探了解其煤层的分布,勘探钻机的种类繁多,根据功能和使用的条件的不同,钻机的结构会相应作出改变以适应当前的作业环境。市面上针对综采工作面回采煤层进行钻探的设备较少,现今的处理方式仍是通过人工手持钻机进行钻探工作,这种方式存在人员用量大、工作环境恶劣、危险系数高及钻孔效率低等问题。为解决这些问题,本文开展了适用于综采工作面回采煤层探顶煤钻机的设计研究工作。首先对特定煤矿煤岩分布情况进行了分析,根据该地区的煤岩性质确定了钻机采用双刃旋转切削破岩的方式进行钻进,研究了旋转切削钻机破岩机理得出了钻机主要参数的计算公式,并进一步分析切削破岩钻进过程中的主要影响因素。根据综采工作面现场环境结合现有钻机成熟理论,提出钻机的设计要求,设计出整机的结构。确定了钻机采用全液压驱动,能实现独立行走,具有折叠回收功能,进给方式采用倍程进给机构,并对钻机主要零部件进行了仿真分析设计。根据钻机整机的使用要求设计了钻机的液压系统。在MATLAB软件的基础上,根据钻机工作中的受力特点,建立整机的静力学模型,利用力系与力矩平衡方程得到整机各点的受力情况,分析钻机处于不同位置时对其主要支撑点受力变化的影响,确定钻机最佳钻探位置。对整机模型进行简化,建立整机的纵向、横向动力学模型,研究钻机整机振动传递的规律。利用ANSYS workbench软件对钻机整机进行模态分析和谐响应分析,检验整机是否会发生低频共振现象,并对整机前八阶主要振型进行了分析,得出了钻机整机的振动主要以纵向振动为主。通过谐响应分析得出钻机托架在各个方向上的振动位移随响应频率之间的变化规律,验证了整机与其他部件间无共振现象的发生。采用仿真软件AMESim,对综采工作面回采煤层探顶煤钻机的液压系统进行动态特性仿真分析,分别构建了该系统四个主要回路的仿真模型。通过对以上基本回路的仿真分析表明:所选择的液压元件性能匹配,设计的液压系统能够满足钻机实际使用要求。该论文有图49幅,表14个,参考文献60篇。更多还原

【Abstract】 To the exploration of coal thickness distribution can effectively prevent the happening of the accident and improve the output of coal,the coal mine is the most common ways of exploration through exploration and drill for coal seam drilling to understand the distribution of the coal seam,a wide range of exploration drilling rig,according to different functions and conditions of use,the drill structure will change accordingly to adapt to the current working environment.In the market,there are few equipment for drilling in the coal seam of fully mechanized mining face,and the current treatment method is still to drill by manual handheld drilling machine,which has problems such as large amount of personnel,bad working environment,high risk coefficient and low drilling efficiency.In order to solve these problems,this paper carried out the design and research of the top coal drilling machine suitable for the fully mechanized mining face.Firstly analyses the specific coal mine coal and rock distribution,according to the nature of coal and rock in the area identified the drill with the method of double rotating cutting rock drilling,studied the mechanism of rotary cutting drill rock drill the main parameter calculation formula,and further analysis the main influence factors in the process of cutting rock drilling.According to the site environment of fully mechanized mining face and the mature theory of existing tunnel drilling machine,the design requirements of the drilling machine are put forward and the structure of the whole machine is designed.It is determined that the drilling rig adopts the full hydraulic drive,can realize independent walking,has the function of folding and recycling,and adopts the double feed mechanism for the feed mode,and carries out the simulation analysis and design of the main parts of the drilling rig.The hydraulic system of drilling rig is designed according to the requirements of the whole rig.On the basis of MATLAB software,according to the working characteristics of the drilling machine,the static model of the whole machine is established.The force situation of each point of the whole machine is obtained by using the balance equation of force system and torque.The influence of the main supporting point force change when the drilling machine is in different positions is analyzed,and the optimal drilling position of the drilling machine is determined.The whole machine model was simplified,and the longitudinal and transverse dynamic models of the whole machine were established.Using ANSYS workbench software to conduct modal analysis and harmonious response analysis on the whole rig,to check whether the whole rig will occur low frequency resonancephenomenon,and to analyze the main vibration mode of the whole rig in the first eight orders,it is concluded that the main vibration of the whole rig is longitudinal vibration.By means of harmonic response analysis,the variation rule of vibration displacement of rig bracket in all directions with response frequency is obtained,which verifies that there is no resonance between the whole rig and other components.The simulation software AMESim was used to simulate and analyze the dynamic characteristics of the hydraulic system of the top coal drilling rig in the fully mechanized mining face back to the coal seam,and the simulation models of the four main circuits of the system were built respectively.Through the simulation analysis of the above basic circuit,it is shown that the performance of the selected hydraulic components matches,and the designed hydraulic system can meet the actual requirements of the drilling rig.更多还原