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徐州矿务局庞庄煤矿930工作面横跨庞庄井一370m水平向斜构造的核部,与928工作面相毗邻.在928工作面中部伴有与该向斜斜交的次级向斜构造延展至930工作面内.造成928工作面老空积存大面积生产废水,威胁930工作面的安全回采.经分析,决定从930工作面沿空材料道对928老塘实施用接杆钎子钻孔放水、逐步降压、控制水流量、分阶段疏放等措施探放928工作面老塘积水.首先,按照预计老塘积水上限布置第一个钻孔,探明水情后依次降低探孔位置,达到逐步降压、分阶段探放的目的.
The 930 working face of Pangzhuang coal mine in Xuzhou Mines Bureau is located across the 370m horizontal syncline of the Pangzhuangjing Mine and is adjacent to the 928 face in the middle of 928 facet with a secondary syncline obliquely intersecting the syncline Extended to 930 face, resulting in a large area of 928 face empty storage of large-scale production of waste water, threatening the safe recovery of 930 faces.According to the analysis, the decision to 930 from the face of empty materials 930 Laotang implementation of the use of post drill rod drill Hole drainage, step-down pressure, control of water flow, step by step, and other measures of exploration and drainage measures 930 face pond water .First, according to the estimated Laotang water upper limit of the first drill hole, Hole location, to step-down step by step, the purpose of exploration and release.