摘要
为了研究膏体充填底板破坏规律的充填效应,以岱庄矿2153膏体充填工作面为工程背景,分别采用Midas/GTS-FLAC3D耦合模拟技术、滑移面理论力学分析和钻孔注水法实测方法对该工作面底板破坏深度进行了研究。结果表明,充填工作面底板破坏深度的数值模拟解约为3m,底板岩层破坏模式为以拉为主的拉剪破坏,充填开采煤层底板最大应力为初始应力的0.5倍;采用滑移面理论得到底板破坏深度的力学解析解为2.5~3.0 m,与钻孔注水实测平均值3 m基本吻合,充填开采底板破坏深度是垮落法开采的0.2倍。
To study the effect of paste filling on the failure law of seam floor,taking 2153 working face of Daizhuang Mine as the engineering background,three methods,Midas/GTS-FLAC^（3D） coupling simulation technology,mechanics analysis of sliding surface theory and borehole water injection method,were used to obtain the failure depth of coal seam floor.The results show that the numerical simulated value of failure depth is about 3 m.The failure mode of floor is mainly tensile fracture of tensile-shear damage and the maximum vertical stress is 0.5 times as big as the initial stress.Further,the corresponding value by sliding surface theory is between 2.5 m and 3.0 m,which is in agreement with the measured value by water injection method.The failure depth of floor by paste filling is 0.2 times as deep as the caving method.
出处
《煤矿安全》
CAS
北大核心
2018年第1期76-79,84,共5页
Safety in Coal Mines
基金
山东省泰山学者专项经费资助项目(201309)
关键词
膏体充填
底板破坏深度
钻孔注水
突水
充填效应
paste filling
failure depth of seam floor
borehole water injection
water inrush
filling effect
