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对小于0.8 m极薄煤层的覆岩运动形式及机理进行深入研究,提出了1种极薄煤层覆岩运动形式-连续缓沉破坏运动。将连续运动覆岩简化为弹性基础连续板力学模型,推导出工作面前后的顶板挠度曲线z1、z2及压力p1、p2计算表达式,通过现场观察及运用数值模拟技术,判定达竹煤电集团斌郎煤矿覆岩为连续缓沉运动形式,并提出了相应的支护控制措施,在N1014工作面进行了成功实践。
The motion and the mechanism of the overlying strata in extremely thin coal seam less than 0.8 m are studied in depth. The continuous motion overburden is simplified to the mechanical model of the elastic foundation continuous slab. The formulas of the top deflection plots z1 and z2 and the pressures p1 and p2 before and after the working face are deduced. By observing the site and applying the numerical simulation technology, The overburden strata in Binlang coal mine are in the form of continuous slow motion and the corresponding support control measures are put forward. The successful practice has been carried out on N1014 working face.