采动作用下断层带非均质性对活化程度影响的模拟研究  

Simulation Study on Influence of Heterogeneity of Fault Zone on Degree of Activation under Mining Operation

作　　者：雷煜 张文泉[2] 曹思文 LEI Yu;ZHANG Wenquan;CAO Siwen(Changsha Institute of Mining Research Co.,Ltd.,Changsha 410012,China;College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Yangcun Coal Mine,Yankuang Energy Group Co.,Ltd.,Jining 272100,China)

机构地区：[1]长沙矿山研究院有限责任公司,长沙410012 [2]山东科技大学能源与矿业工程学院,山东青岛266590 [3]兖矿能源集团股份有限公司杨村煤矿,山东济宁272100

出　　处：《煤炭技术》2025年第4期173-179,共7页Coal Technology

基　　金：国家自然科学基金项目(51774199)。

摘　　要：以兖矿能源集团杨村煤矿331工作面地质条件为研究背景,在有限差分软件FLAC^(3D)中实现非均质应变软化模型,研究断层带的物理参数和非均质参数对断层活化程度的影响。研究结果表明:(1)抗拉强度的非均质性对断层活化程度无影响,除此之外,其他参数随着非均质度的增大,断层带的滑移破坏程度都有所增大,其中,杨氏模量的非均质性对断层滑移量的影响程度远大于其他参数,而内聚力和内摩擦角对断层带破坏程度的影响较大;(2)运用形状参数m描述的断层带非均质程度,对断层滑移破坏有着显著影响,随着断层带内岩块性质及裂隙分布的更加均匀,断层滑移量呈指数关系逐渐减小,且最后趋于定值,断层带破坏程度呈一次函数关系逐渐减小;(3)通过研究描述断层带整体强度大小的比例参数u_(0)的影响作用,可以看出,断层带整体强度越高(比例参数u_(0)值越大),其破坏程度受均质性(形状参数m)的影响程度越高,断层滑移量受均质性的影响程度越低。Focuse on the geological conditions of working face 331 in Yangcun coal mine of Yankuang energy group and utilizes the heterogeneous strain softening model in FLAC^(3D) finite difference software.The aim is to investigate the impact of physical parameters and heterogeneity parameters on fault activation degree within the fault zone.The findings indicate that:(1)The heterogeneity of tensile strength has no effect on the degree of fault activation.Besides this,as the degree of heterogeneity of other parameters increases,the extent of slip damage in the fault zone also increases.Among these,the influence of Young′s modulus heterogeneity on fault slip is much greater than that of other parameters,while cohesion and internal friction angle have a significant impact on the degree of fault zone damage.(2)The uniformity indexm describing heterogeneity within the fault zone greatly influences slip failure.As rock properties and crack distribution become more uniform within the fault zone,there is an exponential decrease in both slip quantity and failure degree until they reach a fixed value.Additionally,the degree of fault zone failure decreases linearly over time.Additionally,the degrec of fault zone failure decreases linearly over time.(3)By studying how overall strength ratio parametersu affect damage degrees within the fault zone,it can be observed that higher overall strength values(the larger the value of the ratio parameter u_(0) is)lead to increased susceptibility to homogeneity-induced(shape parameter m)damage while reducing slip quantities caused by homogeneity.

关 键 词：断层带 非均质性 应变软化 断层活化 

分 类 号：TD322[矿业工程—矿井建设] TD325