大台井“川法”密集柱支撑力分析

Analysis of“sichuan method”dense prop support force in Datai pithead

从单体液压支柱的特性出发,结合大台井实际的煤层和顶板条件,计算了俯伪斜走向分段密集采煤法密集柱的支撑力。影响密集柱支撑力的相关参数主要有煤层厚度与倾角、采深、控顶距等。密集柱支撑力的大小随煤层厚度增加而增大,顶板压力主要由密集柱承担;随煤层倾角的增大而减小;随采深增加而线性增大,深部开采时应考虑适当增加支护强度;随控顶距增大而增加,但增加幅度较小。所得到的结论为大台井“川法”采煤的实施提供了理论依据。

From the characteristic of prop and actual conditions of coal seam and roof in Datai pithead, the support force of the dense prop in 揝ichuan Method?is calculated. The important influencing parameters include the thickness and pit of coal seam, the mining depth, the roof controllable size and others. The size of the support force of the dense prop increases with the increase of thickness of the coal seam, the roof press is borne mainly by the dense prop. It decreases with the increase of angle of the coal seam. It increases linearly with the increase of the mining depth, so the support strength should be increased properly in the case of deep mining. It increases with the increase of the roof controllable size, but the extent is small. The conclusions in this paper provide some theoretical foundation for 揝ichuan Method?in Datai Pithead.