基于有限元法的U型钢卡缆受力分析研究

Study on Force Analysis of U-Type Steel Card Cable Based on Finite Element Method

随着煤矿开采深度增大,支护难度也成倍提升。U型钢可缩性支架被广泛地应用于深部矿山巷道支护。卡缆是U型钢可缩性支架的关键部件,其性能直接影响着U型钢支架的支护承载性能。在理论分析U型钢拱形支架在不同受载情况下的变形特点的基础上,借助ABAQUS有限元数值计算软件,分别研究了双槽夹板卡缆在圆弧形和椭圆弧形2种型钢搭接段滑移时的力学特性,并且分析了U型钢螺栓的受力特征,得到了双槽夹板卡缆对U型钢拱形支架的约束作用会受到搭接段曲率不匹配度的影响的结论,提出了控制U型钢失效的建议。对于确保地下工程U型钢支架的稳定支护具有重要意义。

As the depth of coal mining is increasing,the difficulty of support is also raised exponentially,and the U-type steel telescopic bracket is widely used in the support of deep mine roadway.Card cable is the key component of U-type steel telescopic bracket,and its performance directly affects the support bearing performance of U-type steel telescopic bracket.On the basis of theoretical analysis of the deformation characteristics of U-type steel arch support in different loading conditions,the mechanical characteristics of double-slot splint cable in the sliding of two kinds of steel laps in circular and elliptical arcs were studied with the help of ABAQUS finite element numerical computation software and the force characteristics of U-type steel bolts were analysed,and it was concluded that the restraining effect of the double-slot splint cable on the U-type steel arch support would be affected by the mismatch of curvature of the lap section.The conclusion of the influence of the matching degree is put forward,and the suggestion of controlling the failure of U-type steel is put forward.It is of great significance to ensure the stable support of U-type steel support in underground engineering.