山地浅埋煤层工作面支架合理工作阻力研究

Research on Working Resistance of Mining Working Face in Mountainous Shallow-Buried Coal Seam

针对山地浅埋煤层开采过程中工作面出现的矿压显现强烈,支架被压死或支架尾梁与顶梁分离等现象,通过建立山地浅埋煤层基本顶初次垮落时岩块触矸前控制基本顶滑落失稳的结构力学模型对山地浅埋煤层开采工作面支架合理工作阻力进行了研究。研究表明:山地浅埋煤层开采过程中基本顶出现滑落失稳的可能性相对较大,且基本顶的初次破断具有不对称性,通过计算得出发耳井田1、3煤层山地浅埋煤层工作面液压支架工作阻力应大于5 773 kN。

Considering the phenomenon appeared in mountainous shallow-buried coal seam such as roof pressure was large, strata behaviors were intense, and supports damaged or the tail beam and roof beam separated, it re- searched the determination of the support＇ s reasonable working resistance in mountainous shallow-buried coal seam mining working face through establishing the roof structure model of the basic roof＇ s first collapse and periodic col- lapse by the method of theoretical analysis. The possibility of appearing sliding instability was relatively larger in mountainous shallow-buried coal seam mining. And the basic roof＇ s primary collapse was anisomerous. Based on cal- culation, the hydraulic support＇ s working resistance should be more than 5773kN in the working face of the 1st and 3rd coal seam in Faer mine field.