煤矿膏体充填支架结构与液压系统建模仿真研究

发布时间：2018-03-17 00:22

本文选题：充填开采　切入点：充填支架　出处：《太原理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：充填开采是解决“三下压煤”的根本途径,现阶段充填开采技术依然无法满足高效环保的绿色理念。究其重要原因在于充填开采的工艺设备无法达到工作面所需要的开采及充填要求。本文通过理论分析和模拟研究的手段,以汾西集团新阳煤矿10203工作面地质条件为背景,针对该矿的支架围岩力学关系、支架三维模型及压架模拟实验设计、ANSYS支架结构有限元分析、支架液压系统模型构建与仿真四个方面展开研究。首先,以矿压基本理论为中心,分析了支架、围岩所受载荷的情况,建立了充填系统的等效弹簧支护模型。重点以充填支架与围岩相互的作用关系基础上分析论证,参考前人研究的充填体强度形成规律,进一步建立了充填支架初撑力计算公式,并得出初撑力的大小随着充填体压缩率的增大而增大。随着工作面推进距离的增加,充填支架初撑力大致以对数形式增加,并逐渐趋于稳定。其次,基于充填支架与围岩关系的理论分析、在新阳矿原有的支架结构参数和液压支架的基本设计原则的基础上,对膏体充填工作面的充填液压支架进行了辅助机构分析优化和主体承载结构的三维建模。基于充填开采特殊工况,通过ANSYS有限元分析对支架底座扭转、集中加载、顶梁偏载、中部及两端集中加载方式进行压架实验。得出充填支架在充填初期的顶梁偏载、底座扭转加载的工况下受到的应力最大,其最大应力为139.91MPa,支架的后立柱部分受到的应力普遍较大,为充填支架的优化提供了一定的数据支持。最后,针对该矿的实际情况,建立了充填液压支架的液压系统仿真模型,对支架立柱系统、控制系统的各部件工作状态进行模拟仿真,得到充填开采初期的立柱升柱特性:在立柱初撑阶段,随着时间不断增加立柱升高,当达到12.3s时完成升柱并上升至2.1m。同时分析了在膏体充填初期,支架液压系统安全阀的启闭特性、阀芯的受力、位移、速度特性。得出了随着顶板对支架的来压,先导阀芯产生周期性受力的结论。通过本文的研究,丰富了膏体充填开采、膏体充填支架结构、膏体充填支架液压系统等研究领域的内容,同时也为支架整体的优化设计提供了多角度的参考和借鉴。
[Abstract]:Filling mining is the fundamental way to solve the problem of "three lower pressure coal". At present, the filling mining technology still can not meet the green idea of high efficiency and environmental protection. The important reason is that the technological equipment of filling mining can not meet the requirements of mining and filling required by the working face. The means of simulation research, Based on the geological conditions of No. 10203 face of Xinyang Coal Mine of Fenxi Group, this paper aims at the mechanical relationship of support surrounding rock, the three-dimensional model of support and the experimental design of pressure frame simulation. The finite element analysis of support structure with ANSYS is carried out. The modeling and simulation of hydraulic system of support are studied in four aspects. Firstly, taking the basic theory of rock pressure as the center, the load of support and surrounding rock is analyzed. The equivalent spring support model of filling system is established. Based on the interaction between backfill support and surrounding rock, the formula for calculating the initial bracing force of backfill support is further established by referring to the law of strength formation of backfill body studied by predecessors, and based on the analysis and argumentation of the interaction between backfill support and surrounding rock. It is concluded that the initial support force increases with the increase of filling compression ratio. With the increase of working face advance distance, the initial support force increases in logarithmic form and tends to be stable gradually. Based on the theoretical analysis of the relationship between backfill support and surrounding rock, and on the basis of the original structural parameters of support and the basic design principles of hydraulic support in Xinyang Mine, In this paper, the auxiliary mechanism analysis and optimization of the filling hydraulic support in paste filling face and the 3D modeling of the main bearing structure are carried out. Based on the special working conditions of filling mining, the support base torsion, concentrated loading and beam offset load are analyzed by ANSYS finite element analysis. The central and two ends of the concentrated loading mode of the compression frame experiment. It is concluded that the filling support in the initial filling of the top beam bias load, the base torsional loading under the conditions of the maximum stress, The maximum stress is 139.91MPa, and the stress on the back column of the support is generally larger, which provides certain data support for the optimization of the backfill support. Finally, according to the actual situation of the mine, the hydraulic system simulation model of the backfill hydraulic support is established. The working state of the components of the support column system and the control system are simulated and simulated, and the characteristics of the column lifting at the initial stage of filling mining are obtained: in the initial bracing stage of the pillar, the column increases with time, At 12.3 s, the lifting column is finished and rises to 2.1 m.At the same time, the opening and closing characteristics of the safety valve of the hydraulic system of the support, the stress, displacement and velocity characteristics of the valve core during the initial stage of paste filling are analyzed. Through the research of this paper, it enriches the research fields of paste filling mining, paste filling support structure, paste filling support hydraulic system, etc. At the same time, it also provides a multi-angle reference for the optimum design of the support.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD355;TD823.7

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