检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:李广波[1] 宁建国[1] 肖志民[1] 顾清恒 李建政[1] 王俊[1]
机构地区:[1]山东科技大学矿业与安全工程学院,山东青岛266590
出 处:《煤矿开采》2015年第6期15-18,共4页Coal Mining Technology
基 金:国家自然科学基金项目(51274133);高等学校博士学科点专项科研基金(20123718110013);山东省自然科学基金重点项目(ZR2012EEZ002)
摘 要:在断层影响下,覆岩的破断形式以及应力分布等都将发生变化。为分析断层对覆岩应力演化的影响,采用FLAC3D数值计算方法,以某矿的断层赋存特点为工程背景,模拟分析了下盘工作面向正断层推进过程中工作面超前支承压力与弹性应变能分布规律。研究结果表明:由于断层带的存在,阻隔了覆岩的应力传播。随着工作面逐渐接近断层,工作面超前支承压力与弹性应变能显著增高;断层处的应力与弹性应变能大量积聚,极易诱发冲击地压。该研究对相似地质条件下的煤层冲击地压的预测及防治起到指导作用。Under the influence of fault,forms and the stress distribution of the overburden rock will change. To analyze the effect of fault on the stress evolution law of coal face with FLAC3 Dnumerical calculation method,the fault occurrence characteristics of a mine as engineering background,the simulation analysis of the footwall face normal fault efforts to promote the advance abutment pressure and the elastic strain energy in the process of distribution. The results show that the fault block of strata stress significantly. As working face close to the fault,advance abutment pressure and the elastic strain energy increased significantly; vertical stress and elastic strain energy accumulation near the fault,easy to induce impact ground pressure. The study of similar geological conditions of the prediction and prevention of percussive ground pressure of coal seam play a guiding role.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.222