Relationship of coal and rock damage,underground behavior and methane gushing in fully-mechanized caving mining face
Abstract：In order to obtain variation rules of methane gushing with mining procedure in fully-mechanized caving mining face,micro-seismic monitoring for coal and rock damage,underground behavior monitoring and methane gushing monitoring were done in S2205 face of Tunliu Colliery.3D time-space distribution of coal and rock damage,working resistance of powered supports and advanced abutment pressure variation were analyzed.Combined with methane gushing data,the authors researched the relationship of coal and rock damage,underground behavior and methane gushing.The results show that amounts of micro-seismic matters occurred in behind of coal wall with the mining face advanced,summit of micro-seismic matters＇ occurrence is earlier than that of the periodical pressure and the summit of methane gushing is later than that of periodical pressure.Therefore,micro-seismic matters variation might be used to predict underground pressure and methane gushing of mining face.The micro-seismic matters of fully-mechanized caving mining face in S2205 face of Tunliu Colliery and the sudden increase in energy are earlier than periodical pressure one day.And the fully destruction of coal rock is earlier than methane gushing eight hours.
Keywords：fully-mechanized caving mining facecoal and rock damageunderground behaviormethane gushing
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)