随着矿业城市和矿区建设步伐的加快,建设用地紧张的问题日益突出,不可避免地将利用废弃采空区塌陷地进行建筑和兴建各种交通、电力通讯设施。老采空区上方建筑的关键因素是老采空区的残余移动量大小。通过多个矿区地表移动资料的分析得到工作面停采后地表下沉和下沉速度的规律,结合采空区上覆岩体应力应变变化规律,分析了停采后地表下沉速度变化的机理,分别建立不同阶段预计模型对工作面停采后下沉速度和下沉值进行预计,为老采空区残余移动变形预测提供了基础。
With the speeding-up of the construction of mining cities and mining areas, the lack of land for construction has become increasingly prominent. It is inevitable to utilize caved mined-out areas for the construction of various transport or electrical and communication facilities. The key issue for the structures above the old mined-out area is the residual movement amount of the old mined-out area. The law of subsidence and the rate of subsidence after stoping halt were obtained by analyzing the ground movement data of several mine areas. The mechanism of the ground subsidence speed change after stoping halt was analyzed in consideration of the stress-strain change law of the rock mass overlying the minedout area. Models for different stages were established and used to forecast the ground subsidence speed and amount after stoping halt, providing a basis for the forecast of residual movement deformation of old mined-out area.