Research on Distribution Law of Three Zones in Coal Thickness Variation Mining Area
Taking the working face of Tengzhou Dongda Mining Industry that has the coal thickness variation situation as the research background,numerical simulation,formula calculation,on-site testing and other research methods are used to analyze the movement law of the overlying rock strata and the development characteristics of the"three zones"after mining in the coal thickness variation area.The development height of the"three zones"after coal seam mining is studied,and the"three zones"height of the 7202 working face is finally determined.Through on-site measurements,it is obtained that the height of the collapse zone is 28.4 m and the height of the fault zone is 84.5 m.Using the"three down"empirical formula,it is calculated that the errors are 23.3%and 4.7%,respectively;The results obtained through numerical simulation have errors of 9.2%and 10.2%,respectively.The research results indicate that the use of numerical simulation method can effectively predict the height of the"three zones"in the coal thickness variation area,which can provide reference for the safe mining evaluation of coal thickness variation areas under similar conditions.
coal thickness variation mining areathree zones distribution lawnumerical simulation
国家科技期刊平台
NSTL
万方数据
