Rock-burst mechanism and prevention in working face of shallow buried coal-seam
Abstract：After analyzing series monitoring data of micro-seismic and powered support pressure in Xinjiang,rock-burst mechanism was obtained.Thick and hard roof is main pressure source of rock-burst.Bad and delayed supporting make roof pressure transferred on coal-wall ahead of mining face.Thus,elastic energy and stress concentration formed,and fast mining speed aggravates energy and stress concentration degree.In this instance,rock-burst is inevitable because of strong burst liability of coal-seam.Based on this,rock-burst prevention principle was established that avoiding transferring hard and thick roof pressure to coal-wall.The prevention methods included broken blasting of hard roof,pressure-relief blasting of coal-body and increasing setting load of powered supports.The practice shows that prevention methods are effective.
Keywords：shallow buried depthworking facerock-burstmechanismprevention
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 1618-1623 )