大倾角煤层覆岩破坏规律相似材料模拟研究

Simulation Study on Overlying Strata Damage Rules with Similar Material in Large Dip Angle Coal Seam

针对某矿2317工作面地质条件,结合相似材料模拟基本理论,对大倾角煤层顶板破裂过程与覆岩破裂结构进行观测,并对直接顶、基本顶的破坏规律,大倾角煤层覆岩空间结构演化进行了研究,结果表明:随着工作面推进,工作面上位岩层在一定范围内裂断与分离,形成高位岩层的传递力结构;沿工作面倾斜方向中、上部区域内"三带"特征明显,且层位较高,而下部区域的顶板岩层形成的层位较低或不明显。

Bases on the geological condition of 2317 working face in a coal mine, according to the basic theory of similar material simulation, observes the process of roof damage and the structure of overlying strata damage to large dip angle coal seam, and researches on the damage rule of immediate roof and basic roof, and the structure evolution of overlying strata space in large dip angle coal seam. The results show that with the advancing of working face, upper strata breaks and separates within a certain range, forms transmission structure of high position strata. The characteristic of three zones in middle and upper area along the vergence direction of working face is obvious and the horizon is higher, but the horizon that roof strata in lower area forms is lower or not obvious.