Research On A Geomagnetic Activity Law And Rockburst Early Warning Mode Based On Microseismic Monitoring

In this paper,a deep mine deep rock of rock burst criterion and calculation of critical depth of three rock stress-strain,stress related lithologic material index,based on the conventional rock burst method: elastic strain energy index method,ore and rock strength of brittle and brittle deformation coefficient method of coefficient method the deep part of the ore for the comprehensive evaluation,that the deep part of the ore rock ore had different degree of rockburst occurrence tendency;and IMS multi-channel microseismic monitoring platform for mining of shallow and deep and deep ground pressure activities based on the law of the research analysis.Finally,according to the monitoring data of several months,the early warning mechanism of rock burst is analyzed,and it is proved in a rock burst disaster.The main research contents are as follows:1,Rock burst depth criterion and tendency analysisThe basic theory of rock burst is analyzed in detail,including the definition,the dynamic characteristics,the factors of rockburst in deep well,and the classification of rock burst.The emphasis on rock burst of the progressive failure process of a mine,and deep ore rock analysis depth criterion of rock burst,the core will be carried out in the laboratory three axial stress strain test,the rock burst evaluation of deep ore rock by the elastic strain and strength of brittle deformation coefficient,brittleness coefficient method.2,The application of IMS microseismic monitoring technologyFrom the hardware and software architecture,signal acquisition,localization algorithm,obtain velocity,accuracy analysis and signal recognition are introduced in the aspects of the mine multi-channel high precision microseismic monitoring system,technology by means of numerical simulation and test of the artificial fixed system positioning effect and sensitivity were analyzed and calculated,focusing on how to make the identification and exclusion of several methods of micro-seismic signal and interference signal.3.The law of ground pressure caused by dynamic disturbanceLaw of ground pressure activities caused by micro-seismic monitoring data to nearly half of the actual mining activities of residual ore recovery and low strength of the shallow deep mine-550 m normal mining activities,deep development projects are analyzed.4,Rock burst early warning mechanismBased on the monitoring data of a few months,several identification criteria of rock burst are analyzed,and the three level early warning mechanism is proposed.An early warning of a weak rock burst occurred in the vicinity of the S1 pass in the middle section of the-550 m in the deep part of the of the mine was made by using the three level early warning model combined with the current situation of each region.