开采沉陷预计参数的确定方法

基于相似理论的基本原理 ,根据我国 1 2 0多个地表移动观测站的监测数据 ,导出了开采沉陷预计参数与岩体综合变形模量E、采深H和采厚M等因素之间的统计公式 ,即地表下沉系数 q、水平移动系数b、主要影响角正切tanβ和拐点偏移距与采深的比值S0 /H与相似准则E/Em 和 ρH2 ( 1 0 0MEm)之间呈线性关系 .研究表明 :岩体的综合变形模量对开采沉陷预计参数的影响显著 ,采深主要影响拐点偏移距 ,对其它预计参数的影响甚微 ,而采厚对所有预计参数的影响都很小 ,可忽略

The determining method of predication parameters on mining subsidence

The statistic formulae of the predication parameters,which are influenced by the comprehensive strain modulus of rock mass and mining depth and height of coal seam are derived by the similarity theory on the basis of the data from 120 monitoring ground movement stations in mining field.It has obtained the four predication parameters,that is subsidence factor q,displacement factor b,the tangent  tan β of major influence angle and the ratio S 0/H of deviation of inflection point with mining depth,which are proportional to the similarity criterions E/E m  and ρH 2/(100E m M).The research shows that the comprehensive strain modulus of rock mass is the main influenced factor for all predication parameters,and mining depth has some influence only to the deviation of inflection point,but mining height of coal seam has little influence on all predication parameters.