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以神东矿区2-2煤层为研究对象,通过分析浅埋煤层保水开采机理和关键,以“综合分类指标分析法”、以导水裂隙带高度作为分类的综合指标、以采高、顶板厚度、岩体完整性及强度等作为综合分类指标的相关因素,对比基岩厚度与导水裂隙带高度,将沙基型浅埋煤层保水开采适用条件划分为七类,初步形成浅埋煤层保水开采的“分类体系”;通过对各分类采高、开采速度、支护力、局部处理措施等的分析与计算,初步形成沙基型浅埋煤层保水开采的“技术体系”.以大柳塔煤矿12404工作面过强含水区域为保水开采工程实例,对照“分类体系”标准划分了5个分区,对照“技术体系”标准选取各分区开采的技术参数及措施,实验结果表明,观测点水位经下降、回升后趋于稳定,工作面安全通过富水区域.
Taking the No.2-2 coal seam of Shendong Mining Area as the research object, by analyzing the mechanism and key points of water-saving mining in shallow coal seams, taking “the comprehensive classification index analysis method” as the comprehensive index of the classification of the water- Roof thickness, rock mass integrity and strength as the comprehensive classification index, compared the thickness of basement and the height of water-conducting fractured zone, the suitable conditions for water-saving mining of sand-based shallow-buried coal seam are divided into seven types and the initial formation of shallow- Water-saving mining “classification system ”; Through the analysis and calculation of the mining height, mining speed, supporting force, local treatment measures of each classification, the “technical system” Taking the 12404 working face of Daliuta coal mine as an example of water - conserving mining area, five subareas were classified according to the standard of “classification system”, and the technical parameters and measures of each subarea mining were selected according to the standard of “technical system” The experimental results show that the water level at the observation point descends and stabilizes after the rise, and the working face passes the water-rich area safely.