带压开采区超前探目标层位综合确定方法
Synthetic Determination of Target Strata of Pilot Detection for Mining Area with Water Pressure
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摘要: 掘进工作面和回采工作面超前探工作是矿井进行带压开采的重要技术手段,而超前探目标层位是否准确关系到超前探工作的效果,以准格尔矿区中北部6煤带压开采矿井为研究区,通过巷道围岩松动圈计算、底板安全隔水层厚度计算、底板采动破坏带计算,并系统总结底板岩层组合特征及带压开采水文地质特征,提出了带压开采区超前探目标层位综合确定方法。结论表明:准格尔矿区6煤掘进工作面超前探目标层为6煤与9煤之间薄层粗粒砂岩层、回采工作面超前探目标层为9煤与奥陶纪灰岩之间粗粒砂岩层,为准格尔矿区各矿井开展带压开采工作提供技术支撑。Abstract: The pilot detection for driving face and stoping face is an important technological means for mining with water pressure, and the accuracy of target strata is related to the result of pilot detection. The coal No.6 in the middle and north of Jungar Mining Area is taken as the research area, through the calculation of roadway broken rock zone, floor safe thickness of water-resisting layer, floor mining failure zone, the characteristics of floor rock assemblage and hydrogeological characteristics of mining with water pressure are systematically summarized, and then the comprehensive determination method of target strata for pilot detection in the mining zone with water pressure is proposed. The results show that the target strata of pilot detection in the driving working face of the coal No.6 is the thin gritstone strata between coal No.6 and coal No.9 of Jungar Mining Area, and the target strata of pilot detection in the stoping face is the gritstone strata between coal No.9 and Ordovician limestone, which provides technical support for the work of mining with water pressure in the mines of Jungar mining area.
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