深部大采高工作面支承压力的分布规律
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摘要
针对深部大采高工作面由于一次采出厚度大、煤炭采出率高,采空区内覆岩自由运动空间大,基本顶来压较综放开采更为剧烈,超前支承压力峰值更高、峰值距离煤壁距离更大、影响范围更广等突出问题,采用理论分析的方法,研究了深井大采高工作面采动应力的分布规律,为相似地质条件下煤层安全高效开采提供了理论基础。
Because of the large thickness of first mining, high coal extraction rate, large free movement space of overburden rock in goaf, the basic top pressure is more intense than fully mechanized caving mining, and the peak value of leading support pressure is higher than that of fully mechanized caving mining. The distribution law of mining stress in deep mining face with large mining height is studied by using the method of theoretical analysis, because the distance between peak value and coal wall is larger and the range of influence is wider. It provides a theoretical basis for the safe and efficient mining of coal seam under similar geological conditions.
Because of the large thickness of first mining, high coal extraction rate, large free movement space of overburden rock in goaf, the basic top pressure is more intense than fully mechanized caving mining, and the peak value of leading support pressure is higher than that of fully mechanized caving mining. The distribution law of mining stress in deep mining face with large mining height is studied by using the method of theoretical analysis, because the distance between peak value and coal wall is larger and the range of influence is wider. It provides a theoretical basis for the safe and efficient mining of coal seam under similar geological conditions.
引文
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[6]郭卫彬.大采高工作面煤壁稳定性及其与支架的相互影响机制研究[D].徐州:中国矿业大学,2015.
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[3]姜耀东,赵毅鑫,宋彦琦,等.放炮震动诱发煤矿巷道动力失稳机理分析[J].岩石力学与工程学报,2005,24(17):3 131-3 136.
[4]胡国伟,靳钟铭.基于FLAC3D模拟的大采高采场支承压力分布规律研究[J].山西煤炭,2006,26(2):10-12,16.
[5]牟宗龙,窦林名,倪兴华,等.顶板岩层对冲击矿压的影响规律研究[J].中国矿业大学学报,2010,39(1):40-44.
[6]郭卫彬.大采高工作面煤壁稳定性及其与支架的相互影响机制研究[D].徐州:中国矿业大学,2015.
[7]吴锋锋.厚煤层大采高综采采场覆岩破断失稳规律及控制研究[D].徐州:中国矿业大学,2014.
[8]陈刚.大采高采场围岩的矿压显现规律研究[D].北京:中国矿业大学(北京),2011.
[9]王树忠.五阳煤矿大采高工作面覆岩运动规律及巷道支护研究[D].北京:中国矿业大学(北京),2015.
[10]孙伟,只玉军,于海洋.千米深井大采高工作面覆岩破坏过程数值模拟分析[J].现代矿业,2013,29(3):1-4.