Study on rock pressure behavior law and numerical simulation under condition of regenerated roof
Tao Hanghang
Abstract：Taking the No.210107 working face of a certain mine as the research object,a cantilever rectangular elastic thin plate model in the form of a regenerated roof was established to simulate the stress and strain laws of the regenerated roof during mining.The critical conditions for the bending and breaking of the regenerated roof during mining were analyzed,and the prevention and control methods for roof collapse were proposed.The results indicate that the smaller the thickness of the regenerated roof,the greater the tensile stress on the roof,and the longer the mining advance distance,the greater the tensile stress on the regenerated roof.During the process of regener-ated roof,the displacement of roof will first suddenly increase and then gradually decrease until it tends to stabilize,and the displace-ment of floor heave will diverge in an elliptical outward increasing state.The peak stress of the lower layer working face gradually de-creases until the fluctuation stabilizes,and the relationship between the advanced support stress of working face and distance from the working face shows a trend of first increasing and then decreasing.In terms of the management of recycled roof,it is necessary to strengthen the monitoring of activity of the recycled roof and timely release pressure,and adopt effective support methods to prevent the danger caused by large-scale activity of roof.
Keywords：regenerated roofrock pressure behaviornumerical simulationroof management
Publication Date：2025-10-30
Online Publishing Date：2025-11-27(First online date of this platform, not the publication date of the document)
Pages：8( 84-90,96 )