For the backfill hydraulic support as the key equipment for achieving integration of backfilling and coal mining simultaneously in the practical process, its characteristics will directly influence the backfill body's compression ratio. Horizontal roof gap, as a key parameter of backfilling characteristics, may impact the backfilling effect from the aspects of control of roof subsidence in advance, support stress, backfilling process and the support design. Firstly, the reason why Horizontal roof gap exists was analyzed and its definition, causes and connotation were introduced, then adopting the Pro/E 3D simulation software, three typical 3D entity models of backfill hydraulic supports were built, based on the influence of Horizontal roof gap on backfilling effect, and influence rules of four factors, i.e. support height, suspension height, suspension angle and tamping angle, were emphatically analyzed on Horizontal roof gap. The results indicate that, the four factors all have sign...

作为实现回填和采煤一体化的主要设备,回填液压支架特性将会影响回填体压缩率。水平顶板间隙作为回填特性的关键参数,会从预先控制顶板沉降、支撑力、回填过程和支架设计等方面影响回填效果。文中首先分析了水平顶隙存在的原因,介绍其定义、起因和内涵。然后通过Pro/E 3D仿真软件进行仿真,考虑水平顶板对回填效果、支架高度、悬架高度、悬架角和夯实角等因素的影响,建立了3种典型的回填液压支架3D立体模型,并在顶隙的基础上进行分析。结果表明,这4个因素均对顶板水平缝隙有显着影响,但影响趋势和程度存在差异,分别显示负线性相关、正线性相关、正半抛物相关和负半抛物相关。