文章导读
总览 评价 王路珍 1， ， 孔海陵 2，* （ 1、 盐城工学院基础部； 2、 中国矿业大学理学院； ） 摘要： 利用煤矿底板突水因数表述了层状岩体渗流失稳条件。根据A矿的岩层柱状图，运用RFPA2D软件计算了采场推进到25米和50米时底板岩层的应变分布，并利用渗透
王路珍1，， 孔海陵2，*
（
1、盐城工学院基础部； 2、中国矿业大学理学院； ）
摘要：
利用煤矿底板突水因数表述了层状岩体渗流失稳条件。根据A矿的岩层柱状图，运用RFPA2D软件计算了采场推进到25米和50米时底板岩层的应变分布，并利用渗透特性与应变之间的关系，计算了相应的底板突水因数。研究表明：岩层的破坏造成渗透率的增大、非Darcy流β因子和加速度系数的减小，从而使突水因数增大，突水发生的危险性增大；随着工作面的推进，底板的破坏范围扩大，变形也相应地增大，突水因数增大；当推进到25米时，底板突水因数为95.1%；当推进到50米时，底板突水因数为619%。
关键词：
突水因数；层状岩体；非Darcy流；底板；RFPA
Wang Luzhen1,， Kong Hailing2,*
（
1、Yancheng Institute of Technology； 2、School of Science, China University of Mining &Technology； ）
Abstract：
A definition of water-inrush-factor is presented, and the criterion about the instability of seepage flow of water in stratified rock mass is describes by water-inrush-factor. Based on the column of rock mass in A Coal Mine, the distributions of stress in mining floors are simulated by using the numerical testing machine (RFPA) at the moment when longwall mining is pushed on to 25 meters and 50 meters respectively; and the water-inrush-factors are calculated on the basis of the relationship between permeability parameters and strain. It shows that the permeability raises, the non-Darcy flow β factor and acceleration coefficient decrease as the failure of the mining floors, and the water-inrush-factor raises subsequently. As the longwall mining is pushed on, the destroyed district extends, and the strain and water-inrush-factor increase correspondingly. For the mining floor in A Coal Mine, the water-inrush-factors are 95.1% and 619% when the working face is pushed on to 25 and 50 meters respectively.
Tag：
点此返回栏目查看更多>>>参考论文
