综放开采顶煤与支架耦合力学作用探析

根据现场实测、实验室相似材料模拟和力学分析， 阐述了综放开采顶煤的受力特性和放顶煤液压支架的３ 种工作方式， 认为垮落带与裂隙带顶板的接触条件、顶煤的残余强度和支架安全阀开启压力是影响放顶煤液压支架工作方式的３ 个主要因素。

Study on the coupling mechanism between top coal and powered supports in sub level caving longwall faces

Based on the in situ instrumentation,physical modeling and theoretical analysis,this paper discusses the loading characteristics of the top coal and the three kinds of possible working status of powered supports in sub level caving longwall faces It is pointed out that there are three major factors determining the actual working status of the powered supports,namely the contact condition between the fractured zone and caved zone in the roof strata;the residual strength of the top coal;and the set pressure of the relief valve