预计参数对开采沉陷的影响研究

摘要

With the exploitation of coal resources,the environmental damage caused by mining subsidence is becoming more and more serious. It is important to establish an accurate model of mining subsidence prediction model. In this paper,the dynamic prediction system of mining subsidence is developed based on the MATLAB platform and the influence of three param-eters,such as the subsidence coefficient,the main influence radius and the mining speed,on the predicted results is analyzed with the engineering example. The results show that the subsidence coefficient increases,the surface subsidence basin is steep, and the horizontal moving distance and curvature increases;the major influence radius increases,the range of surface subsid-ence increases,and the decrease of the major influence radius will increase the value of slope and curvature of the open cut face and the final mining area in a small range,which has a great influence on the surface disturbance;Increasing the mining speed is beneficial to reduce the deformation and deformation of the surface,so as to reduce the influence of mining on the sur-face.%随着煤炭资源的开采,开采沉陷所引发的环境破坏问题日益严峻.如何建立准确的开采沉陷预计模型至关重要.基于MATLAB平台开发了开采沉陷动态预计系统,结合工程实例分析了下沉系数、主要影响半径、开采速度这3个预计参数对预计结果的影响.研究表明:下沉系数增大,地表下沉盆地陡峭,水平移动距离与曲率也随着增大;主要影响半径增大,地表下沉范围增大,下沉曲线的拐点不变,而主要影响半径减少会使开切眼与终采处地表倾斜值和曲率值在小范围内急速增大,对地表扰动影响较大;加快开采速度,利于减少地表的移动变形量,从而减少采动对地表的影响.