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基于矿井提升机构安全运行的重要性,以新城某矿为研究背景,建立混合井提升关键机构的安全动态监测及预警系统。采用数值模拟方法建立提升机基础有限元模型,并进行模态分析,得出提升机基础的各阶振型频率。对分级加载过程进行时程分析,把最大振动位移达到危险值时的振动加速度作为提升机基础的安全动态监测指标。建立井架有限元模型,分别研究空载静止状态和正常使用极限状态下井架的受力与变形,从而得到井架破坏的临界预警值,以此建立预警系统。结果表明,以临界预警值作为安全性量化指标建立的预警系统能用来对提升机运行过程中产生的故障进行预警,并确定故障所在位置。
Based on the importance of safe operation of mine hoisting mechanism, taking a new mine in Xincheng as a research background, a hybrid well was established to enhance the safety dynamic monitoring and early warning system of key institutions. The basic finite element model of hoisting machine was established by numerical simulation and the modal analysis was carried out to get the modal frequencies of each mode of hoisting machine foundation. Time-course analysis of the classification loading process, the vibration acceleration when the maximum vibration displacement reaches the dangerous value is taken as the safety dynamic monitoring index of the hoisting machine. The derrick finite element model was established to study the stress and deformation of the derrick under no-load static state and normal use limit state, respectively, so as to obtain the critical warning value of the derrick destruction, so as to establish the early-warning system. The results show that the early warning system established by using the critical warning value as a quantitative indicator of safety can be used to pre-warning the failure occurred during the operation of the hoist and determine the location of the fault.