Feasibility study and application of upward mining based on finite element RFPA2D numerical simulation
SUN Jianxin
Abstract：Cilinshan Coal Mine is divided into upper and lower coal seams,namely No.9 coal seam and No.15 coal seam.At present,the No.15 coal seam has been partially mined,resulting in the movement of the overlying rock layer,which may have a certain impact on the upper No.9 coal seam.To analyze the mining feasibility of No.9 coal seam,taking the No.15 coal seam of Cilinshan Coal Mine as the engineering background,using RFPA2D numerical test system,the No.15 coal mining numerical calculation model was estab-lished,dynamic analysis of No.15 coal seam in the mining process and the rear overlying rock destruction rule was carried out.The con-clusion was drawn that coal seam 9 is located at the boundary between the fracture zone and the curved subsidence zone of coal seam 15.The analysis suggested that No.9 coal seam could be mined after stable mining of No.15 coal seam,and it was finally concluded that No.9 coal seam can be mined normally,and industrial practice was carried out.By monitoring and analyzing the advance pressure data of No.9 coal seam,it shows that the surrounding rock pressure meets the normal production needs of the mine.
Keywords：upward mininggoafRFPA2D numerical simulationsupport pressure
Publication Date：2024-10-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 52-55,62 )