Design and Analysis on Driving Roadway Along Goaf Support for the 8103 Working Face Return Air Roadway in Dongzhouyao Mine
When a wide coal pillar with 30 m is left in the 5103 return air roadway of the 8103 working face in Dongzhouyao Coal Mine,the stress environment of the roadway is relatively poor,the heaving floor and roof subsidence are relatively large.It is planned to implement the small coal pillar driving roadway along goaf technology.A theoretical study is conducted on the distribution situation of goaf lateral support stress after stabilization,a scientific and reasonable coal pillar size reservation and return air roadway support form are proposed,and downhole practical applications are carried out.The research results indicate that the small coal pillar driving roadway along goaf improves the stress environment of the roadway,reduces stress concentration and mine pressure manifestation,the 5103 return air roadway driving roadway along goaf and roadway during the working face stoping period are safe and stable.
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