围压作用下型煤蠕变特性及本构关系研究
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摘要
对松藻煤电集团打通一矿7号软煤层制备的型煤围压作用下不同载荷水平进行了煤岩蠕变试验研究。通过改变蠕变载荷,得到了不同蠕变载荷作用下完整的蠕变3阶段曲线和各蠕变阶段的蠕变特征。根据试验分析结果,得到围压作用下煤岩蠕变规律和各蠕变阶段的蠕变参数。研究表明,随着蠕变载荷的增加,起始蠕变量和加速蠕变阶段的蠕变加速度均呈增加趋势,而过渡蠕变阶段和稳定蠕变阶段的持续时间与蠕变载荷关系不明显。黏弹塑性本构模型能够较好地反映围压作用下煤样的蠕变本构关系,通过计算得到了相关蠕变模型的参数。
Creep tests under different levels of loads have been performed on briquette under confining pressure of Datong #7 mine belongs to Songzao coal-electricity group.Through changing the level of creep loads,integrate three-stage curves and characteristics of each of creep steps are obtained.According to the analysis of the experimental results,laws and parameters of each of creep steps under confining pressure are obtained,both initial amount of creep and creep acceleration of acceleration creep phase showed an increasing trend as the addition of creep loadings,but the relationship between lasting time of transfer and stable creep steps with creep loadings showed non-regularity;and constitutive relation of briquette can be reflected by cohesive-elastic-plastic model.Based on calculation,parameters of cohesive-elastic-plastic model are obtained.
Creep tests under different levels of loads have been performed on briquette under confining pressure of Datong #7 mine belongs to Songzao coal-electricity group.Through changing the level of creep loads,integrate three-stage curves and characteristics of each of creep steps are obtained.According to the analysis of the experimental results,laws and parameters of each of creep steps under confining pressure are obtained,both initial amount of creep and creep acceleration of acceleration creep phase showed an increasing trend as the addition of creep loadings,but the relationship between lasting time of transfer and stable creep steps with creep loadings showed non-regularity;and constitutive relation of briquette can be reflected by cohesive-elastic-plastic model.Based on calculation,parameters of cohesive-elastic-plastic model are obtained.
引文
[1]焦作矿业学院瓦斯地质组.瓦斯地质学[M].北京:煤炭工业出版社,1998.
[2]周世宁,何学秋.煤和瓦斯突出机理的流变假说[J].中国矿业大学学报,1990,19(2):1-7.ZHOU Shi-ning,HE Xue-qiu.Rheological Hypothesis of coal methane outburst mechanism[J].Journal of China University of Mining&Technology,1990,19(2):1-7.
[3]刘江,杨春和,吴文,等.岩盐蠕变特性和本构关系研究[J].岩土力学,2006,27(8):1267-1272.LIU Jiang,YANG Chun-he,WU Wen,et al.Study on creep characteristics and constitutive relation of rock salt[J].Rock and Soil Mechanics,2006,27(8):1267-1272.
[4]丁秀丽,刘建,白世伟,等.岩体蠕变结构效应的数值模拟研究[J].岩石力学与工程学报,2006,25(增刊2):3643-3650.DING Xiu-li,LIU Jian,BAI Shi-wei,et al.Study on numerical simulation of structure effects of rock mass creep[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(Supp.2):3643-3650.
[5]曹树刚,鲜学福.煤岩蠕变损伤特性的实验研究[J].岩石力学与工程学报,2001,20(6):817-821.CAO Shu-gang,XIAN Xue-fu.Testing study on the characteristics of creep and damage of coal and other rocks[J].Chinese Journal of Rock Mechanics and Engineering,2001,20(6):817-821.
[6]杨彩虹,李剑光.非均匀软岩蠕变机理分析[J].采矿与安全工程学报,2006,23(4):476-479.YANG Cai-hong,LI Jian-guang.Analysis of creeping mechanisms of non-uniformity soft rocks[J].Journal of Mining&Safety Engineering,2006,23(4):476-479.
[7]汪仁和,李栋伟,王秀喜.改进的西原模型及其在ADINA程序中的实现[J].岩土力学,2006,27(11):1954-1958.WANG Ren-he,LI Dong-wei,WANG Xiu-xi.Improved Nishihara model and realization in ADINA FEM[J].Rock and Soil Mechanics,2006,27(11):1954-1958.
[8]蒋斌松,蔡美峰,贺永年,等.深部岩体非线性Kelvin蠕变变形的混沌行为[J].岩石力学与工程学报,2006,25(9):1862-1867.JIANG Bin-song,CAI Mei-feng,HE Yong-nan,et al.Chaotic behavior of nonlinear Kelvin creep of rock mass in deep ground[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(9):1862-1867.
[9]刘雄.岩石流变学概论[M].北京:地质出版社,1994.
[10]周世宁,林柏泉.煤层瓦斯赋存与流动理论[M].北京:煤炭工业出版社,1990.
[11]尹祥础.固体力学[M].北京:地震出版社,1985.
[2]周世宁,何学秋.煤和瓦斯突出机理的流变假说[J].中国矿业大学学报,1990,19(2):1-7.ZHOU Shi-ning,HE Xue-qiu.Rheological Hypothesis of coal methane outburst mechanism[J].Journal of China University of Mining&Technology,1990,19(2):1-7.
[3]刘江,杨春和,吴文,等.岩盐蠕变特性和本构关系研究[J].岩土力学,2006,27(8):1267-1272.LIU Jiang,YANG Chun-he,WU Wen,et al.Study on creep characteristics and constitutive relation of rock salt[J].Rock and Soil Mechanics,2006,27(8):1267-1272.
[4]丁秀丽,刘建,白世伟,等.岩体蠕变结构效应的数值模拟研究[J].岩石力学与工程学报,2006,25(增刊2):3643-3650.DING Xiu-li,LIU Jian,BAI Shi-wei,et al.Study on numerical simulation of structure effects of rock mass creep[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(Supp.2):3643-3650.
[5]曹树刚,鲜学福.煤岩蠕变损伤特性的实验研究[J].岩石力学与工程学报,2001,20(6):817-821.CAO Shu-gang,XIAN Xue-fu.Testing study on the characteristics of creep and damage of coal and other rocks[J].Chinese Journal of Rock Mechanics and Engineering,2001,20(6):817-821.
[6]杨彩虹,李剑光.非均匀软岩蠕变机理分析[J].采矿与安全工程学报,2006,23(4):476-479.YANG Cai-hong,LI Jian-guang.Analysis of creeping mechanisms of non-uniformity soft rocks[J].Journal of Mining&Safety Engineering,2006,23(4):476-479.
[7]汪仁和,李栋伟,王秀喜.改进的西原模型及其在ADINA程序中的实现[J].岩土力学,2006,27(11):1954-1958.WANG Ren-he,LI Dong-wei,WANG Xiu-xi.Improved Nishihara model and realization in ADINA FEM[J].Rock and Soil Mechanics,2006,27(11):1954-1958.
[8]蒋斌松,蔡美峰,贺永年,等.深部岩体非线性Kelvin蠕变变形的混沌行为[J].岩石力学与工程学报,2006,25(9):1862-1867.JIANG Bin-song,CAI Mei-feng,HE Yong-nan,et al.Chaotic behavior of nonlinear Kelvin creep of rock mass in deep ground[J].Chinese Journal of Rock Mechanics and Engineering,2006,25(9):1862-1867.
[9]刘雄.岩石流变学概论[M].北京:地质出版社,1994.
[10]周世宁,林柏泉.煤层瓦斯赋存与流动理论[M].北京:煤炭工业出版社,1990.
[11]尹祥础.固体力学[M].北京:地震出版社,1985.
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