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Application Research of Remote Microseismic Monitoringand Early Warning Technology on Ground Pressure of Many Levels Enhanced Mining

Author: ZuoMin
Tutor: XuBiGen; TangShaoHui
School: Changsha Institute of Mining Research
Course: Mining engineering
Keywords: activities of pressure laboratory test FLAC3Dnumerical simulation microseismic monitoring system positioning anddebugging forecasting and early warning
CLC: TD326
Type: Master's thesis
Year: 2013
Downloads: 56
Quote: 0
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Abstract


Xinjiang Ashele copper Limited by Share Ltd formally put into operation in2002September.It designs production capacity of4000t/d. Mine mainly uses the large diameter middle-hole and deep hole open stope filling mining method, and mechanized downward drift slicing and filling mining method and the shrinkage method etc. Multistage mining at the same time formed a more complex environment cause mining stope ground-pressure activity strongly. The investigation and analysis of field indicate that because of the short length, stope layout concentration, self-weight stress and the influence of mining, what cause a drift and branch roadway of ore bodies have different degree of deformation and failure of rock engineering, exposed surface spalling, fall or collapse hazard. Therefore, this paper combine subject that "research on monitoring and early-warning technology of micro-seismic multichannel in Xinjiang Ashele copper Limited by Share Ltd". To study the mine to establish a set of effective24channel microseismic monitoring system in order to monitor ground pressure effectively forecast and early warning. The main research contents are as follows:1. Investigation and exploitation of the mining status and ground pressure activity of mine monitoring area, analysis of the monitoring area ground pressure activity rules and characteristics.2. Experimental study on microseismic characteristics of ore rock and acoustic parameters of rock tuff, dacite porphyry and ore pyrite in the mine monitoring region,analysis of cracked rock mass acoustic emission parameters and distribution features in the process, and research characteristics of rock fracture.3. According to the key monitoring of700m mine stope below middle and both800m above the mined-out area to the establish a set of24channels of microseismic monitoring system. Through the5artificial blasting debugging system positioning accuracy, determine the most sensors P wave velocity is4720m/s and S wave velocity is2776.5m/s, the location error is about10m. Analysis of reasons of positioning error, the positioning accuracy and source monitoring sensitivity is in great relevance. Research and analysis of waveform characteristics of different source of mine and comfirm microseismic waveforms to determine the failure of rock mass.4. Based on the Linux operation system, remote monitoring of mine geostatic activity. Analysis of potential first-order differential、 microseismic events B value and combined with time process graph can realize the short and mid microseismic events forecast. For source displacement field analysis of the main effects on the pressure activities of the regional. Using FLAC3D finite element software was used to simulate the main monitoring regional, analysis of energy change mining. The simulation results and the microseism source analysis are both very unify, finally effectively determines the range of ground pressure activities.

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CLC: > Industrial Technology > Mining Engineering > Mine the pressure and support > Rock pressure and rock movement > Mine pressure Observation and equipment
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