扎哈淖尔露天矿二采区南边坡到界煤层回采方案研究

Study on stopping scheme of coal seam in the south slope of No.2 mining area in Zhahanao'er Open-pit Mine

为了保证扎哈淖尔露天矿南边坡到界煤层回采的安全性,详查工程地质资料及实际揭露边坡分层岩体各自物理力学性质,并利用刚体极限平衡法分析与评价了到界煤层边坡稳定性,通过对南边坡到界煤层回采前后边坡稳定性的分析研究,在保证南边坡稳定的前提下,制定了到界煤层保留、全部采出、部分采出3种合理的到界煤层回采方案,本着煤炭资源开采效益最大化、剥采比最小的原则,建议选择部分采出方案,可增加经济效益1 227.12万元。

In order to ensure the safety of the coal seam mining in the south slope of the Zhahanao＇er Open-pit Mine, the mine checks the physical and mechanical data and the actual physical and mechanical properties of the stratified rock mass. The stability of coal seam is analyzed and evaluated by rigid body limit equilibrium method. Through the analysis of the stability of the slope before and after the coal seam mining in the south slope, under the precondition of ensuring the stability of the south slope,the mine formulates three kinds of reasonable dew facilities. Based on the principle of coal resources mining efficiency maximization and stripping ratio minimum, the article recommends to select part of the mining program, which can increase the economic benefits of 38.347 million.