Study On Ground Pressure Activity Law Of Filling Mining In Gaofeng Deep Mine And Its Controlling Methods

The depth of Gaofeng mine has been over1000m. Its deep mine is on the condition ofhigh ground pressure, the local ore rock broken and multi-mine-out areas filled. resulting inground pressure manifestation and high safety risk. In order to improving safety of Gaofengdeep mining, so it is necessary to study on ground pressure activity law of filling mining inGaofeng deep mine and its controlling methods.Based on the engineering geology survey at first, the characteristic of impact groundpressure in Gaofeng mine is the anchor support damage and catastrophic collapse of roadway.With the increase of mining depth, the pressure damage forms also gradually complicated andaggravating, and its scope has been expanded. Then we can research on ground pressuredistribution features of Gaofeng mining by the numerical simulate. The result show that alongore body direction of hanging wall zone is the area of stress concentration and footwall zoneis the area of stress decrease, but sinking and driving engineering is decorated on the ore bodyhanging way. This is the major factor of deep frequently ground pressure activity. Consideringthe characteristics of Gaofeng deep ground pressure above studies and Starting from reducingthe mining ground pressure, the normal numerical test is used to optimization structuralparameters. Aiming at problem of traditional split-set bolt support in ground pressure control,go on studying the possibility of GFRP bolt and split-set bolt combined support in Gaofengbroken roadway. The field test show that new supporting technology can effectively maintainthe stability of roadway by GFRP bolt.Through the research above and technique project adopted, The ground pressuremanifestation of Gaofeng mine is controlled effectively. The research results will used inGaofeng mine deep mining, and the on the same types of mine has a certain reference.