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为准确评价勘查区内的水文地质条件,验证原有钻孔的施工质量,在距原7755号孔50m的地方施工了S06-1孔。施工发现,S06-1孔的标志层和煤层资料与原7755号相差很大,最大可达119.60m。究其原因是本区岩性软硬相间、岩层倾角大以及施工质量差所致。在仔细分析施工钻孔岩性的基础上,发现区内有一层灰褐色、含直径为1mm的石英泥岩较为稳定,可作为标志层对煤层进行预测,并以此提出了见煤深度预测公式,对该区煤层进行预测。预测结果与实际见煤深度很近,从而证明该标志层及预测公式可靠,可作为后续钻探施工指导依据。
In order to accurately evaluate the hydrogeological conditions in the exploration area and verify the construction quality of the original borehole, S06-1 hole was constructed at a distance of 50m from the original No. 7755 hole. Construction found, S06-1 hole signs and seam information and the original No. 7755 difference is very large, up to 119.60m. The reason is due to the lithology of soft and hard rock, rock dip angle and poor construction quality. On the basis of careful analysis of the lithology of construction boreholes, it is found that there is a layer of taupe in the area, and the quartz mudstone with diameter of 1mm is relatively stable, which can be used as a marker layer to predict the coal seam. Based on this, Predict the coal seams in this area. The predicted result is close to the actual coal depth, which proves that the index layer and prediction formula are reliable and can be used as the basis for subsequent drilling.