封闭式可缩性金属支架解析计算
|
摘要
对于深埋、软弱矿山巷道,可缩性金属支架是常用的支护形式,以适应围岩发生较大变形及其压力。针对封闭式可缩性金属支架,考虑在较大荷载作用下或围岩产生较大变形情况下支架节产生缩动时,进行其内力的计算。实际上,地下结构为超静定结构,支架缩动为非可逆过程,且缩动后支架形状会产生变化、卡缆将限制支架变形,这些都将使支架产生残余内力。通过计算支架的缩动残余内力、卡缆作用残余内力和荷载作用内力,并相叠加,进而获得支架缩动后支架的真实内力,从而为可缩性支架的设计计算提供依据。
Yieldable steel supports are common support forms in deep and weak roadways of a mine,to accommodate the large deformation of their surrounding rocks.The internal forces of a close type yieldable steel support are calculated,in which the support nodes are yielded in the cases of the great loads or large deformation of the surrounding rocks of a roadway.Actually,the underground structure is a hyperstatical structure.The yielding of the support is an irreversible process.And the shape of the support would be changed and the deformation of support would be limited by the ataples of the support nodes after yielding.So,they would produce the internal force in the yieldable steel support.The true internal force of the support after yielding could be got by calculating the residual internal forces due to the yielding of support and the staple's limited and by adding the internal force due to loads.The results provide a theoretical basis for the design and calculation of yieldable steel supports.
Yieldable steel supports are common support forms in deep and weak roadways of a mine,to accommodate the large deformation of their surrounding rocks.The internal forces of a close type yieldable steel support are calculated,in which the support nodes are yielded in the cases of the great loads or large deformation of the surrounding rocks of a roadway.Actually,the underground structure is a hyperstatical structure.The yielding of the support is an irreversible process.And the shape of the support would be changed and the deformation of support would be limited by the ataples of the support nodes after yielding.So,they would produce the internal force in the yieldable steel support.The true internal force of the support after yielding could be got by calculating the residual internal forces due to the yielding of support and the staple's limited and by adding the internal force due to loads.The results provide a theoretical basis for the design and calculation of yieldable steel supports.
引文
[1]侯朝炯.巷道金属支架[M].北京:煤炭工业出版社,1989.
[2]蒋斌松.U型钢可缩性支架的预应力分析[J].中国矿业,1998,(2):43-46.JIANG Bin-song.Analysis of pre-stress force of yieldableU-steel support[J].China Mining Magazine,1998,(2):43-46.
[3]蒋斌松,陈子荫.可缩性金属支架的计算理论[J].煤炭学报,1994,19(5):493-503.JIANG Bin-song,CHEN Zi-yin.Theory for calculation ofyieldable steel arch[J].Journal of China CoalSociety,1994,19(5):493-503.
[4]蒋斌松,王渭明.可缩性金属支架的有限元计算[J].岩石力学与工程学报,1995,14(2):145-154.JIANG Bin-song,WANG Wei-min.Finite elementmethod of yieldable steel arch[J].Chinese Journal ofRock Mechanics and Engineering,1995,14(2):145-154.
[5]尤春安.U型钢可缩性支架缩动后的内力计算[J].岩土工程学报,2000,22(5):604–607.YOU Chun-an.Internal force calculation of U-supportsconsidering yielding[J].Chinese Journal of Geo-technical Engineering,2000,22(5):604-607.
[6]尤春安.可缩性金属支架初始缩动条件[J].煤炭学报,1994,19(3):170-277.YOU Chun-an.Analysis of yielding of yieldable U-steelsupport[J].Journal of China Coal Society,1994,19(3):170-277.
[7]煤炭工业部生产司.巷道金属支架系列[M].北京:煤炭工业出版社,1987.
[8]祝介旺,柏松,刘恩聪,等.龙游石窟结构的力学思想[J].岩土力学,2008,29(9):2427-2432.ZHU Jie-wang,BAI Song,LIU En-chong,et al.Mechanics idea about Longyou Grottoes structure[J].Rock and Soil Mechanics,2008,29(9):2427-2432.
[9]赵宝友,马震岳,梁冰,等.基于损伤塑性模型的地下洞室结构地震作用分析[J].岩土力学,2009,30(5):1515-1521.ZHAO Bao-you,MA Zhen-yue,LIANG Bing,et al.Seismic analysis of underground structures based ondamaged plasticity model[J].Rock and Soil Mechanics,2009,30(5):4545-1521.
[10]刘保国,杜学东.圆形洞室围岩与结构相互作用的黏弹性解析[J].岩石力学与工程学报,2004,23(4):561-564.LIU Bao-guo,DU Xue-dong.Visco-elastical analysis ofinteraction between supporting structure and surroundingrocks of circle tunnel[J].Chinese Journal of RockMechanics and Engineering,2004,23(4):561-564.
[11]龙驭球,包世华.结构力学上册(第二版)[M].北京:高等教育出版社,1994.
[2]蒋斌松.U型钢可缩性支架的预应力分析[J].中国矿业,1998,(2):43-46.JIANG Bin-song.Analysis of pre-stress force of yieldableU-steel support[J].China Mining Magazine,1998,(2):43-46.
[3]蒋斌松,陈子荫.可缩性金属支架的计算理论[J].煤炭学报,1994,19(5):493-503.JIANG Bin-song,CHEN Zi-yin.Theory for calculation ofyieldable steel arch[J].Journal of China CoalSociety,1994,19(5):493-503.
[4]蒋斌松,王渭明.可缩性金属支架的有限元计算[J].岩石力学与工程学报,1995,14(2):145-154.JIANG Bin-song,WANG Wei-min.Finite elementmethod of yieldable steel arch[J].Chinese Journal ofRock Mechanics and Engineering,1995,14(2):145-154.
[5]尤春安.U型钢可缩性支架缩动后的内力计算[J].岩土工程学报,2000,22(5):604–607.YOU Chun-an.Internal force calculation of U-supportsconsidering yielding[J].Chinese Journal of Geo-technical Engineering,2000,22(5):604-607.
[6]尤春安.可缩性金属支架初始缩动条件[J].煤炭学报,1994,19(3):170-277.YOU Chun-an.Analysis of yielding of yieldable U-steelsupport[J].Journal of China Coal Society,1994,19(3):170-277.
[7]煤炭工业部生产司.巷道金属支架系列[M].北京:煤炭工业出版社,1987.
[8]祝介旺,柏松,刘恩聪,等.龙游石窟结构的力学思想[J].岩土力学,2008,29(9):2427-2432.ZHU Jie-wang,BAI Song,LIU En-chong,et al.Mechanics idea about Longyou Grottoes structure[J].Rock and Soil Mechanics,2008,29(9):2427-2432.
[9]赵宝友,马震岳,梁冰,等.基于损伤塑性模型的地下洞室结构地震作用分析[J].岩土力学,2009,30(5):1515-1521.ZHAO Bao-you,MA Zhen-yue,LIANG Bing,et al.Seismic analysis of underground structures based ondamaged plasticity model[J].Rock and Soil Mechanics,2009,30(5):4545-1521.
[10]刘保国,杜学东.圆形洞室围岩与结构相互作用的黏弹性解析[J].岩石力学与工程学报,2004,23(4):561-564.LIU Bao-guo,DU Xue-dong.Visco-elastical analysis ofinteraction between supporting structure and surroundingrocks of circle tunnel[J].Chinese Journal of RockMechanics and Engineering,2004,23(4):561-564.
[11]龙驭球,包世华.结构力学上册(第二版)[M].北京:高等教育出版社,1994.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心