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澄合矿区位于渭北煤田中部,地质勘查时,发现从钻孔中较难采取到柱状或块状的煤心煤样,煤样疏松,多成为碎块状,甚至粉末状。基于地质构造、地层岩性和煤层特征的研究,认为该区煤心煤样破碎的主要原因一方面是由于在成煤过程中煤中的镜质组物质在煤化过程中受到温度、压力的影响,内生裂隙发育所致,另一方面是成煤后期地质构造的改造和破坏作用形成的,钻进时采用的钻压、转速、泵压和取煤器是次要因素。煤心煤样的破碎可从可磨性试验和邻近的煤矿井下采煤中得到佐证。建议以后在该区的勘查时采用单动双管取煤器。
Chenghe Mining Area is located in the central part of Weibei Coalfield. During the geological survey, it is found that it is difficult to adopt the coal-core coal samples with columnar or block shapes from the boreholes. The coal samples are loose and often become crumbled or even powdery. Based on the study of geological structure, lithology of stratigraphy and coal seam characteristics, it is considered that the main reason for the coal-core coal sample crushing in this area is that the vitrinite in coal is influenced by temperature and pressure during the process of coal formation , Due to the development of endogenous fissures, and on the other hand, the reconstruction and destruction of the geological formations in the late stage of coal formation were formed. The weight-on-bit, speed, pump pressure and coal-taking device used during drilling were the secondary factors. The crushing of coal-core coal samples can be corroborated by the grindability test and the adjacent underground coal mining. After the proposed exploration in the area when the use of single-action double-pipe coal separator.