中南大学学报（自然科学版）2017，Vol.48Issue(3)：794-803,10.DOI:10.11817/j.issn.1672-7207.2017.03.030
岩体裂隙渗流-劈裂-损伤耦合模型及应用
Coupling model of seepage-splitting-damage of rock mass fractures and its application
摘要
Abstract
Considering that the coupling effect of seepage-splitting-damage of rock mass fractures is the key reason of geological hazard, such as high pressure water burst of rock engineering, hydraulic fracturing, and so on, the splitting damage mechanism of rock mass fractures and anisotropic seepage characteristics under high water pressure were studied. The coupling theory model for seepage-splitting-damage of rock mass fractures under high water pressure was established, in which the contribution of seepage pressure to flexibility tensor of rock mass and the contribution of wing crack extension to permeability tensor evolution could be reflected. Taking damage stress field and seepage field as two subsystems, indirect coupling method was adopted to establish numerical model of splitting-damage-seepage of rock mass fractures. The model was applied in high pressure injection water to soft top coal in Coal 3 of No 4309 workface in Wangzhuang Mine of Lu'an Coal Mining Group, coupling response between seepage and damage mechanism under high water pressure was studied. The results show that under the high water pressure, the stress field of coal changes sharply, even the state of tensile and pressure in coal is changed. The coal fractures structures changed by high permeable pressure give rise to coal fracture, which is the basic mechanism of high pressure injection water to soft top coal. Through coupling analysis, the rational water injection pressure for Coal 3 of No 4309 workface in Wangzhuang Mine is about 7 MPa, and this result is testified by field test.关键词
岩石力学/高水压/耦合分析/煤层注水/合理注水压力Key words
rock mechanics/high water pressure/coupling analysis/coal seam water infusion/rational water injection pressure分类
建筑与水利引用本文复制引用
赵延林,曹平,马文豪,唐劲舟,万文,王卫军..岩体裂隙渗流-劈裂-损伤耦合模型及应用[J].中南大学学报（自然科学版）,2017,48(3):794-803,10.基金项目
国家自然科学基金资助项目(51274097,51434006) （51274097,51434006）
湖南省自然科学基金资助项目(2015JJ2067) （2015JJ2067）
湖南省教育厅科研项目(13A020) （13A020）
中国矿业大学煤炭资源与安全开采国家重点实验室开放基金资助项目(13KF03) (Projects(51274097, 51434006) supported by the National Natural Science Foundation of China （13KF03）
Project (2015JJ2067) supported by the Natural Science Foundation of Hunan Province （2015JJ2067）
Project(13A020) supported by the Scientific Research Fund of Education Department of Hunan Province （13A020）
Project (13KF03) supported by the Open Projects of State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology) （13KF03）
