Application of strip pillar mining technology under dense constructions within industrial square
GUO Wenbing
LI Yatao
LIU Dachao
Abstract：To extract coal under dense constructions within industrial square in No. 7 coal mine of Pingdingshan Coal Group,based on strip pillar mining theory and coal mining conditions, small variable width panel with wide strip pillar mining plan was established by using theoretical calculation and schemes comparison. Com-bined probability integral method analysis and numerical simulation method,the displacement and deformation laws of surface subsidence basin under repeated mining conditions of small strip pillar mining were studied, surface movement and deformation valves and the influence on the constructions within industrial square was attained. The result shows that the recovery ratio is 65. 5%, the maximum subsidence of the surface is 429. 3mm,the subsidence coefficient is 0. 133 and the surface building damage grade is within grade I when small variable width panel with wide strip pillar mining method was used. This method could control the overly-ing strata deformation and surface subsidence better with increasing recovery ratio,contradiction of protecting surface constructions and extracting more coal pillar could be solved either,it has a good prospect of populari-zation and application.
Keywords：industrial squarestrip pillar miningsurface subsidencevariable width with wide pillarmining under constructions
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 8-14 )