富水顶板大采高综采工作面涌水与矿压关系研究

发布时间：2018-05-09 00:04

  本文选题：关键层 + 复合悬臂梁　； 参考：《煤矿开采》2015年06期

【摘要】：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。
[Abstract]:In view of the water gushing situation of the fully mechanized mining face with high mining height of 31101 water-rich roof in Nalinghe No. 2 coal mine, the relationship between the water gushing in the working face and the mine pressure of the working face as well as the roof structure is analyzed. The key layers are obtained by theoretical calculation. It is considered that the structure of "composite cantilever beam-composite hinged rock beam" is composed of the basic roof and its controlled overburden strata and the critical layer 鈪，

本文编号：1863663