急倾斜综采工作面液压支架的稳定性研究

发布时间：2018-05-25 20:40

本文选题：急倾斜液压支架 + 防滑防倒稳定性　；参考：《西安科技大学》2015年硕士论文

【摘要】：液压支架作为煤矿井下主要的支护设备,是煤矿安全开采的保证。急倾斜煤层综采工作面液压支架因煤层倾斜角度大和地质条件复杂,分析液压支架防滑、防倒稳定性,分析销轴连接孔轴间隙对液压支架稳定性的影响,以及支架有限元分析和运动学仿真,为设计急倾斜液压支架并保证其稳定性提供了可靠的理论依据,对急倾斜煤层的安全生产和采煤效率的提高有重要意义。本论文以某煤矿急倾斜综采放顶煤工作面液压支架展开了研究。为了验证液压支架在工作面上的稳定性,分别建立了液压支架的三维实体模型,力学模型,运动仿真模型和有限元分析模型。首先根据支架在工作面上的受力情况,对支架进行防滑稳定性和防倒稳定性两种失稳情况力学分析计算,证明了液压支架在74°倾角状态的稳定性是有保障的。然后分析了销轴连接对液压支架稳定性的影响,从隔离腐蚀物质和减小孔轴强度差两方面,提出了在销轴和支架孔连接处外面加一个保护套和对支架孔采用磨削淬火加工工艺两个方法增加销轴连接可靠性,从而增加液压支架的稳定性。其次用adams软件对液压支架进行运动仿真,验证了支架顶梁前端的最大位移满足设计要求。最后用ansys软件对液压支架进行有限元分析,进行内加载和侧向水平力外加载验证支架强度,从而证明液压支架的稳定性。
[Abstract]:As the main supporting equipment in coal mine, hydraulic support is the guarantee of coal mine safe mining. Because of the large inclined angle of coal seam and the complex geological conditions, the hydraulic support in the fully-mechanized coal face of steeply inclined coal seam is analyzed for its anti-slip and anti-collapse stability, and the influence of the clearance of pin shaft connection hole on the stability of the hydraulic support is analyzed. The finite element analysis and kinematics simulation of the support provide a reliable theoretical basis for the design of steeply inclined hydraulic support and ensure its stability. It is of great significance to the safety production of steeply inclined coal seam and the improvement of coal mining efficiency. In this paper, the hydraulic support of a fully mechanized caving face in a coal mine is studied. In order to verify the stability of the hydraulic support in the working face, the three-dimensional solid model, mechanical model, motion simulation model and finite element analysis model of the hydraulic support were established respectively. Firstly, according to the stress condition of the support on the working face, the stability of the support in the state of 74 掳inclination is proved to be guaranteed by the mechanical analysis and calculation of the anti-slip stability and the anti-toppling stability of the support. Then, the influence of pin shaft connection on the stability of hydraulic support is analyzed, from the aspects of isolating corrosion material and reducing the strength difference of hole shaft, This paper presents two methods to increase the reliability of pin shaft connection and increase the stability of hydraulic support by adding a protective sleeve outside the connection of pin shaft and support hole and grinding quenching process for support hole. Secondly, the adams software is used to simulate the motion of the hydraulic support, which verifies that the maximum displacement of the front end of the support can meet the design requirements. Finally, the finite element analysis of the hydraulic support is carried out with ansys software, and the strength of the support is verified by internal loading and lateral horizontal force external loading, which proves the stability of the hydraulic support.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD355.4

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