采煤机滚筒截割复杂煤层的突变分析  

Catastrophe analyses of complicated coal seam cut by shearer drum

作　　者：崔新霞[1] 

机构地区：[1]中国矿业大学机电工程学院,江苏徐州221116

出　　处：《辽宁工程技术大学学报（自然科学版）》2011年第6期888-891,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：江苏省博士后基金资助项目(1101106C);中国博士后特别资助项目(201104583);国家自然科学基金资助项目(51005232)

摘　　要：为研究采煤机滚筒截割复杂煤层时载荷的变化规律,在构造复杂煤层结构形式的基础上进行了实验研究。根据实验载荷建立了截割载荷的本构模型,并建立了不同结构形式煤层的力学模型。同时,根据井下实际工况建立了滚筒截煤的力学模型,基于突变理论建立了截割过程的尖点突变力学模型,获得了滚筒截煤的刚度和能量条件。分析结果表明:煤层的阻侵刚度需大于采煤机牵引系统的刚度,否则采煤机将出现强烈的振动,使得传动系统损坏;同时,煤层破碎所需的能量应不大于截割滚筒的能量释放率,否则采煤机滚筒将出现堵转现象,严重时截割电机将被损害。To investigate the load variations of shearer drum during its cut on complex coal seams,a cutting experiment had been conducted based on the constructed structure form of complex coal seams.The constitutive model of the cutting load was built according to the experiment loads,and the mechanical models of the coal seams with different structures were also built.In addition,the mechanical model of the drum cutting into the coal was built according to the actual working conditions underground;and the cusp catastrophe model of the cutting process was built based on catastrophe analysis.Therefore,the stiffness conditions and the energy conditions of the drum cutting into the complex coal seam were obtained.Analysis results indicate that the resistance stiffness of the coal seams should be higher than the stiffness of the shearer haulage system,otherwise the strong vibration will be occurred,and the drum and transmission system may be damaged;the required energy of the coal broken should be not greater than the energy release rate of the drum,or else the drum will be lockout,even the cutting motor is damaged.

关 键 词：本构模型 突变理论 尖点突变模型 刚度条件 能量条件 复杂煤层 滚筒 采煤机 

分 类 号：TD402[矿业工程—矿山机电]