Break Through Survey Technology of Long-distance Driving Roadway in Dongqu Coal Mine
High quality measuring instruments were used,a reasonable survey scheme was made,and construction survey was carried out in break through survey to make a smooth connection between Dongqu Coal Mine+860 horizontal west wing track roadway and Yangjuangang inlet inclined shaft.After the conductor was connected,the closure difference in the horizontal important direction was±406 mm,and the closure difference in the elevation was±104 mm.The through survey accuracy can meet the needs of roadway excavation and safe use.
long distance roadwaybreak through surveysurvey error
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