本文選題：關鍵層 + 復合懸臂梁　； 參考：《煤礦開采》2015年06期

【摘要】：針對納林河二號煤礦31101富水頂板大采高綜采工作面涌水情況,分析了工作面涌水與工作面礦壓以及頂板巖層結構之間的關系。通過理論計算得出了關鍵層層位,認為基本頂及其控制的上覆巖層和關鍵層Ⅱ及其控制的上覆巖層共同組成了"復合懸臂梁—復合鉸接巖梁"結構。計算得出關鍵層Ⅱ的初次斷裂步距為210.3m,周期性斷裂步距為101.1m,與現(xiàn)場實際礦壓與涌水情況相符。認為"復合懸臂梁"的周期性破斷失穩(wěn)使得工作面產(chǎn)生"小"出水,而后發(fā)生小周期來壓;"復合鉸接巖梁"的周期性破斷失穩(wěn)使得工作面產(chǎn)生"大"出水,而后發(fā)生大周期來壓。研究結果為31101工作面的出水預測提供了理論依據(jù),并為相似工作面涌水與礦壓關系研究提供參考。
[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，

本文編號：1863663