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根据钻孔数据及井下新鲜煤层样品测试结果,分析了黄玉川矿4#煤层煤岩煤质特征,以及煤层和煤层顶、底板厚度稳定性,探讨了煤层开采技术条件。结果表明,4#煤层煤岩有机显微组分以惰质组和镜质组为主,无机显微组分以黏土矿物为主,属于低水、中灰、高挥发分的Ⅰ变质阶段烟煤。煤层厚度较稳定,顶板厚度较不稳定,煤层顶、底板岩石抗压强度在横向上变化较大。煤层开采水文、工程地质及其他开采技术条件较好。
According to the borehole data and the test results of fresh coal seam samples, the characteristics of the coal and rock properties of coal seam # 4 in Huangyuchuan Mine, the stability of the thickness of the top and bottom of coal seam and coal seam are analyzed, and the technical conditions of coal seam mining are discussed. The results show that the organic micro-components of coal seam 4 # are mainly composed of inertinite and vitrinite, and the inorganic micro-components are mainly of clay minerals, belonging to the metamorphic stage Ⅰ bituminous coal with low water, middle-ash and high-volatility . The thickness of coal seam is more stable, the thickness of roof is less stable, and the compressive strength of rock roof and floor varies greatly in the horizontal direction. Coal mining hydrology, engineering geology and other mining technology is better.