Gaofeng Mine Fractured Rock Mass Excavation Surrounding Rock Structure Seismic Capacity And Supporting Countermeasure Research

With the high-speed development of economy in our country,the demand for deep mining of mineral resources is increasing dramatically.Resources exploitation process,the security of fractured rock mass becomes the problem to be faced.GaoFeng Mine No.105 orebody with high grade and high value,its ore-bearing rock belongs to fractured rock mass,and suspected earthquakes occurs frequently in the No.105 orebody,production safety suffered a serious threat.Therefore,the study on carrying out surrounding rock structure aseismatic capability of fractured rock mass excavation in GaoFeng Mine experimental area is of great significance.Based on the open topic of Guangxi disaster prevention and safety engineering laboratory,with the field measurement,numerical simulation and theoretical analysis,the paper carried out research and analysis.And several research results were achieved in the following areas.First,At GaoFeng Mine No.105 orebody-151m level fractured rock mass experimental area with surrounding rock excavating,the blasting vibration monitoring experiments measuring point were set.and the experimental area carried out blasting vibration experiment.The experimental data of measuring point were collected and the test result were analyzed.Blasting vibration experiments provides the necessary basic data and reference for the study on surrounding rock structure seismic capacity analysis in the subsequent fractured rock mass excavation and its supporting countermeasure.Second,On the basis of the blasting vibration experiment,in the experimental area,blasting seismic loads were applied,and different records under dynamic load step cycle in roadway plane were get.On the basis of dynamic loads of roadway section,the structure seismic capacity of fractured rock mass excavation surrounding rock were discussed.Finally,On the basis of the researches on the structure seismic capacity of fractured rock mass excavation surrounding rock,the supporting countermeasure for fractured rock mass excavation surrounding rock.The supporting scheme of GaoFeng Mine No.105 orebody-151m level fractured rock mass experimental area was put forward.