Virtual Reality System Of Stability Of Zhangmatun Iron Mine Stope Based On Microseismic Monitoring Technology

In the process of underground mining,the inhomogeneity of rock mass often leads to geological hazards in mining activities,which causes huge economic loss and serious casualties.Microseismic monitoring technique,due to its advantages of wide scope of monitoring and dynamic,has gradually become a very important way to monitor rock burst and research the stability of the ore underground.On the basis of summary and analysis of previous studies,identification of waveform database was established based on the microseismic monitoring,and Zhangmatun seismic activity regularity of iron ore are analyzed.And then a evaluation of stope roof stability was made.After the investigation on the spot,the 3GSM rock mass structural plane scanning was uesd,and rock mechanics parameter was calculated based on the size effect.On the basis of above,Zhangmatun construction of virtual reality system was built.The main work in the paper can be summarized as follows:(1)Based on the mineral deposit stability microseismic monitoring system of Zhangmatun iron,combined with different types of local disturbance,microseismic monitoring waveform database is established by means of waveform recognition in order to count microseismic events caused by mining activities.(2)The rule of micreoseismic space-time activity caused by mining disturbance is analyzed.For the key areas,through calculating and analyzing statistical parameters caused by the process of mining activities,which include the event rate,energy release rate,accumulating apparent volume and energy index,the rule of rock mass micro fracture over time is studied,thus the destruction situation of stope roof is analyzed qualitatively,and the stability is evaluated.(3)The field rock mass structural planes are investigated by 3 GSM technology and rock mass surface real three-dimensional model is set up.With the help of structural plane acquisition software,geometric parameters information of the rock mass structural plane including tendency,dip angle,trend,etc.are acquired and structural plane characteristics are analyzed qualitatively.Then the equivalent fracture network is generated by Monte Carlo method,combined with the indoor experiment,rock elastic and strength parameters are done size effect research and size of representative units and rock mechanics parameters are got.(4)Iron ore three-dimensional scene is established by the virtual reality technology,and the data inquire system and interactive control system is established.Through integrating and visualizing external data,users can have the feeling of raw immersive and have a more accurate understanding of the relative position relation between scene models.