Research On The Deformation And Destroying Mechanism Of Thick Conglomerate And Microseismic Monitoring Technology In Qianqiu Coal Mine

Rock burst is very frequent in Qianqiu Mine, especially recently with theincreasing in depth and strength of Mining,Rock burst happens more frequently,21141the rock burst of working surface is the most serious.In order to avoid the happeningof rock burst,Qianqiu Mine has taken some actions to prevent it.However, rock burststill happens so frequently that it has great influence on the Qianqiu Mine production,therefore,it has been an impending task to go on further research on avoiding the rockburst.The article is that we adopt the method of doing the expriment in the lab todetermine the physical property of coal petrography on the working surface and adoptthe theory analysis methods to research the boulder bed movement and its breakingrule and its influence on the rock burst,and by using the method of the numericalsimulation we research the place of the rock burst,and meanwhile we also haveanalysized the data from the slight shock monitoring system, and also have researchedthe rule of rock burst from the working surface21141.we have come to a conclusion that Qianqiu mine2#coal is equipped with aweak shock tendentiousness by doing the rock burst tendentiousness experiment.Wealso adopt the methods of mechanics of materials to simplify resonably the overlayingthick layer of conglomerate into diagenesis,and therefore we have calculated and alsoachieve the deflection equation of diagenesis section’s internal force and differentmining distance and getting the elastic deformation from the coal buildup and theoverlaying thick layer of conglomerate and its breaking rule.We adopt the numericalsimulation methods to analysize the stress state from21141working surface coal andintroduce the concept of the minimum resistance line to analysize the reasons of thefrequent rock burst on the next lane,and using the analogsimulation methods toresearch gravity rock burst caused by thick layer of conglomerate., we analysize thedata from slight shock monitoring ESG system and achieve the rock burst rule on the21141working surface.