液压支架支护状态分类及感知原理研究  

Research on principle of supporting status classification and sensing of hydraulic support

作　　者：张德生[1,2] 魏训涛 卞冀[4] 文治国 李丁一[1,2] 杜尚宇 ZHANG Desheng;WEI Xuntao;BIAN Ji;WEN Zhiguo;LI Dingyi;DU Shangyu(Coal Mining & Designing Department, Tiandi Science & Technology Co., Ltd., Beijing 100013, China;CCTEG Coal Mining Research Institute, Beijing 100013, China;Yanzhou Coal Mining Company Limited, Zoucheng 273500, China;CCTEG Tangshan Research Institute, Tangshan 063012, China)

机构地区：[1]天地科技股份有限公司开采设计事业部,北京100013 [2]中煤科工开采研究院有限公司,北京100013 [3]兖州煤业股份有限公司,山东邹城273500 [4]中国煤炭科工集团唐山研究院有限公司,河北唐山063012

出　　处：《工矿自动化》2020年第8期32-37,共6页Journal Of Mine Automation

基　　金：天地科技创新创业资金资助项目(2018-TD-ZD08,2020-TD-ZD005);国家自然科学基金联合项目(U1610251);山东省重大科技创新工程项目(2019SDZY04);中央国有资本金资助项目(财企[2013]472)。

摘　　要：针对目前液压支架单一的姿态测量无法全面反映其综合状态,且无法实现液压支架支护状态精确感知的问题,以两柱掩护式液压支架为例,基于液压支架三维空间受力模型,从空间几何状态和结构承载2个方面对液压支架支护状态分类及稳定性进行了分析,指出液压支架支护关键影响参数为倾角、压力和销轴力。液压支架与围岩处于非耦合状态时易发生几何失稳:构建几何平衡方程,得出重心高度和工作面倾角是影响稳定性的关键因素;提出了顶梁、底座和前连杆3个倾角确定液压支架重心位置的方法,利用双轴倾角传感器实现状态感知。液压支架与围岩处于耦合状态时易发生承载失稳:构建液压支架合力作用点的精确求解方程,通过测力销轴实现顶梁与掩护梁铰接点作用力的感知,并根据平衡区理论判定承载失稳类型。Aiming at problem that single attitude measurement of hydraulic support can not fully reflect comprehensive state of hydraulic support,and can not realize accurate perception of supporting state of hydraulic support,taking two column shield hydraulic support as an example,based on three-dimensional space stress model of hydraulic support,supporting state classification and stability of hydraulic support are analyzed from two aspects of spatial geometric state and structural load,and it is pointed out that the key influencing parameters of hydraulic support are inclination angle,pressure and pin force.When hydraulic support and surrounding rock are in uncoupled state,geometric instability is easy to occur:the geometric equilibrium equation is constructed,and the height of gravity center and the dip angle of working face are the key factors affecting the stability;A method of determining the center of gravity position of hydraulic support with three inclination angles of top beam,base and front link is put forward,and the state perception is realized by using dual axis inclination sensor.When hydraulic support and surrounding rock are in coupling state,bearing instability is easy to occur:accurate solution equation of the resultant force point of the hydraulic support is constructed,the state perception of the top beam and the shield beam is realized by the force measuring pin shaft,and the bearing instability type is determined according to the balance zone theory.

关 键 词：液压支架 支护状态分类 几何稳定性 承载稳定性 精确感知 

分 类 号：TD353[矿业工程—矿井建设]