Application Of Microseismic Monitoring Technology In Piaotang Tungsten Mine

The shallow buried orebody of Piaotang Tungsten Mine,rock crushing,multi faults,and there are different levels of people and illegal mining phenomenon,empty area distribution is complex,for this complex shallow buried mines,can't effectively monitor the ground pressure activities,may lead to the occurrence of instability disaster problems of rock fracture(rock burst,roof fall,spalling,etc.).Microseismic monitoring technology as a real-time monitor microfracturing events in the area of technology,from the angle of three-dimensional space monitoring and trace mineral in the rock mass stress under the effect of micro-cracks in rock formation and expanding trend.In this paper,the South Africa IMS rock microseismic monitoring system of Piaotang Tungsten Mine as the basis,through the analysis of Piaotang mine microseismic monitoring data,loss of stability evaluation microseismicity parameter variation and precursory microseismic monitoring of geological disaster model research on characteristics,activity of rock.The main contents and results are as following:1.According to the geological conditions,Piaotang mine goaf distribution,activity status and development status of the investigation,at the same time through the Piaotang Tungsten Mine 328m-556 m the five middle ground pressure activities on-site investigation,draw Piaotang ground pressure activity area and general form of ground pressure activities are mainly due to due to faults affected by the construction,mining and goaf and grade structure influence.2.Combined with the situation of Piaotang Tungsten Mine Ground Pressure activities,based on the positioning of microseismic monitoring system construction principle and microseismic monitoring sensitivity and accuracy of microseismic events,construct the microseismic monitoring system of a set of 24 detector channel number,3D real-time online monitoring of Piaotang Tungsten mine.Through the analysis of the monitoring data shows that the Piaotang mining activity aggregation characteristics and stress deformation characteristics.3.Analysis of monitoring data of Piaotang mine ground pressure activity of microseismic monitoring system,master the Piaotang mining area of temporal and spatial distribution of microseismic activity.At the same time of Piaotang mine 313 stope instability,through microseismic data analysis during the microseismic monitoring system to monitor the 313 stope,the precursory characteristics of rock instability before the microseismicity parameters,including the precursory variation characteristics of accumulated volume,logarithmic energy index,microseismic event rate,displacement,b value.At the same time combined with the stress-strain curve,analysis of the change characteristics of microseismicity parameters,the microseismic monitoring of rock instability critical point.4.Through the analysis of microseismic monitoring data,find out the factors influencing the stability of rock mass,fuzzy comprehensive evaluation method is put forward with prominent impact factor nonlinear,described in detail with prominent impact factor of nonlinear fuzzy comprehensive evaluation model in evaluating the stability of microseismic monitoring in mining area and advantages of the operation process,and through the evaluation and verification of mining microseism the monitoring data,get the evaluation of microseismic monitoring of ground pressure disaster model,then the stability of rock mass in this period,compared with the reality that is in line with the mining area,constructed model has higher accuracy.