Research on the Characteristics of Full Area Pressure Relief in Goaf with Roof Cutting and Pressure Relief
In order to study the impact of roof cutting pressure relief on mining and goaf,this article uses numerical simulation software to analyze the stress situation of roof cutting pressure relief mining tunnels.Firstly,by comparing the stress distribution cloud maps of tunnels with and without roof cutting,it is found that after roof cutting pressure relief,the stress value of the tunnel can be effectively reduced,while reducing the area of stress concentration areas.Moreover,the stress optimization effect of the coal body near the working face is the most obvious.At the same time,comparing the stress curve of the roof along the advancing direction of the working face under traditional mining and top cutting mining modes,it is found that the average stress value of the roof at this time decreases by 50％after top cutting.It is more conducive to maintaining the stability of the surrounding rock of the tunnel.
numerical simulationcutting top pressure reliefstress distributionstress optimization
NETL
NSTL
万方数据
