针对纳林河二号煤矿31101富水顶板大采高综采工作面涌水情况,分析了工作面涌水与工作面矿压以及顶板岩层结构之间的关系。通过理论计算得出了关键层层位,认为基本顶及其控制的上覆岩层和关键层Ⅱ及其控制的上覆岩层共同组成了“复合悬臂梁—复合铰接岩梁”结构。计算得出关键层Ⅱ的初次断裂步距为210.3m,周期性断裂步距为101.1m,与现场实际矿压与涌水情况相符。认为“复合悬臂梁”的周期性破断失稳使得工作面产生“小”出水,而后发生小周期来压；“复合铰接岩梁”的周期性破断失稳使得工作面产生“大”出水,而后发生大周期来压。研究结果为31101工作面的出水预测提供了理论依据,并为相似工作面涌水与矿压关系研究提供参考。%This paper aims at the problems of water inflow in the 31101 fully-mechanized mining working face of very thick coal seam with rich water roof in Nalinhe Ⅱ Coal Mine, the relationship among the water inflow, mine pressure and roof strata structure is ana-lyzed . By theoretical calculations, the key strata are distinguished, structure of “composite cantilever-composite articulated rock beam” composed by main roof with the strata controlled and the No. 2 sub-key stratum with the strata controlled. The initial caving step distance is calculated 210. 3m, cyclical caving step distance is 101. 1m, and it consistents with the actual situation. Pointing out that cyclical rupture instability of composite cantilever rock beam causing small water with weak cycle pressure and that cyclical rupture in-stability of composite articulated rock beam causing heavy water with powerful cycle pressure; Providing the theoretical basis of water forecasting in 31101 working face, the study of the relationship between water and rock pressure of mining face is similar to provide the reference.
展开▼
