含断层底板采动效应数值分析——断层倾角对采动效应的影响  

Numerical Analysis on Mining Effect of Floor with Faults-Influence of Fault's Dip Angle on Mining Effect

作　　者：吴基文[1,2] 

机构地区：[1]安徽理工大学,安徽淮南232001 [2]中国煤炭学会矿井地质专业委员会,安徽淮南232001

出　　处：《矿业安全与环保》2009年第3期19-21,共3页Mining Safety & Environmental Protection

基　　金：安徽省自然科学基金项目(03045403);安徽省教育厅自然科学重点科研计划项目(2005KJ001ZD);安徽理工大学引进人才基金项目(2007yb43)

摘　　要：根据煤层底板地质特征,建立了含断层底板岩体工程地质力学模型,并运用连续介质快速拉格朗日元法对底板采动效应进行了数值模拟。结果表明:在相同的地质和采矿条件下,断层倾角对底板采动效应有较大影响,当工作面推进至断层时,断层倾角越小,底板采动破坏深度越大,且底板卸荷范围较大;当工作面推过断层,底板卸荷深度随断层倾角增大而增加,底板变形破坏深度也加大;断层存在活化现象。揭示了采场底板断层突水的机制。En engineering geo-mechanical model of rock mass in the floor with faults was built according to the geologic characteristics of the coal seam floor,and the mining effect of floor was numerically simulated by the fast Lagrangian analysis of continua.The results showed that the fault's dip angle has greater influence on mining effect of floor under the same geologic and mining conditions.When the working face advanced to the fault,the smaller the fault's dip angle,the deeper the failure depth of floor and the bigger the unloading range in floor.When the working face went throught the fault,the unloading depth in the floor increased with the increase of fault's dip angle,and the depth of deformation and failure in the floor also increased.The fault was active.This revealed the mechanism of water inrush through fault in the mining floor.

关 键 词：煤层底板 断层 岩体结构 采动效应 断层倾角 

分 类 号：TD32[矿业工程—矿井建设] TD742.3