托板控制下开采沉陷的滞缓与集中现象研究

Study of Mining Subsidence Delay and Coneentration under the Control of ″Holding--plate″

本文以四川杉木树矿山开采试验研究为基础，结合地表观测、岩体内部监测和相似材料模拟试验研究了采场上方厚硬岩层对地表沉陷的托板式控制作用，分析了一级、二级托板控制下开采沉陷所表现的滞缓与集中现象的本质。

Based on the insitu surveying of surface subsidence and monitoring of strata displacement carried out in Shamushu Coal Mine in Sichuan Province,and combined with similar simulation tests,this paper studies the control action of ″holding--palte″,thick and hard rock strata lying above the working seam,on the surfaee subsidenee and analyses the nature of mining subsidence delay and concentration under the control of the first and second″holding--plates″.