侏罗系中厚煤层古河流冲刷带的判定及控制实践

Judgment and control practice of ancient river erosion zone in Jurassic medium thick coal seam

煤矿生产过程中,经常遇到特殊地质条件,直接影响到煤层层位判定、掘进施工工艺、掘进速度以及工作面回采等。以哈密大南湖五号井18煤为例,论述在掘进过程中遇到冲刷带这一特殊地质条件时,利用掘进实测、勘探钻孔等资料结合地层沉积规律,来圈定冲刷带范围。通过原因分析、探测分析,采用煤层等厚线图法圈定了冲刷带发育范围,对类似地质条件下的冲刷带预测具有借鉴意义。

In the process of coal mine production,special geological conditions are often encountered,which directly affect the determination of coal seam level,driving construction technology,driving speed and mining face.Taking the No.18 coal of No.5 well of Dananhu in Hami as an example,discussing that when the scouring zone is encountered in the course of driving,the data of actual driving survey,exploration borehole and so on are combined with the depositional law of stratum,to delineate the extent of the scour zone.Based on the cause analysis and exploration analysis,the developing range of scour zone is delineated by using the method of coal seam contour map,which is of reference significance for the prediction of scour zone under similar geological conditions.