本文選題：微震監(jiān)測　切入點：彈性波　出處：《昆明理工大學》2015年碩士論文

【摘要】：在地下環(huán)境采礦施工的過程中,當巖體內(nèi)部受力平衡遭到破壞時,會造成巖體滑落、倒塌的現(xiàn)象,威脅到施工人員的生命安全,因此有必要采取一定的措施來加強施工人員地下施工環(huán)境的安全性。雖然有部分地下施工采礦環(huán)境中裝有國外引進的微震監(jiān)測系統(tǒng),但是由于價格昂貴,維修不便以及維修費用高等原因,使微震監(jiān)測系統(tǒng)無法像在國外一樣得到推廣和應(yīng)用。而目前國外微震監(jiān)測系統(tǒng),也需要工作人員從PC機中進行人工識別信號,通過記錄整理等一系列處理后,才能進行后續(xù)的分析,得出被測巖體破裂情況,環(huán)節(jié)比較復(fù)雜,而且所花時間長,不能及時預(yù)警。本文研究的微震監(jiān)測系統(tǒng),目的就是為了減少現(xiàn)場施工人員的工作量,及時采集和分析數(shù)據(jù),使系統(tǒng)更加智能化。通過對相關(guān)微震監(jiān)測項目的調(diào)研,獲得大量礦山巖體破裂的微震信號數(shù)據(jù),并用所得的數(shù)據(jù)對比聲發(fā)射信號進行整理和分析,得出微震信號的特點。通過整理分析所得數(shù)據(jù)與礦山巖體的實際狀況,依據(jù)聲發(fā)射檢測原理提出了基于微震信號的無損檢測方案,并對系統(tǒng)中信號采集調(diào)理電路進行了設(shè)計。首先選擇了型號為ULT2020的壓電加速度傳感器,設(shè)計了一個增益可調(diào)的前置放大器。然后由微震信號的通帶范圍結(jié)合有源帶通濾波器原理設(shè)計了一個通帶范圍為100Hz～2500Hz,通帶增益K=100的雙二次型橢圓函數(shù)帶通濾波器,以提高有效信號拾取的精確度,通過電路的仿真以及容差分析的結(jié)果可以得出濾波器滿足系統(tǒng)所需的設(shè)計要求。在使用實際電路板測試時,主要是元件排版不合理,波形效果不太理想。最后通過總線類型為USB和以太網(wǎng)的數(shù)據(jù)采集卡EM9636B/BD對信號進行采集和計數(shù),在計數(shù)預(yù)警值的選擇上,通過分析了微震監(jiān)測所得到的微震事件次數(shù)與巖體內(nèi)部破損關(guān)系,提出了一種智能化預(yù)警方案,即顏色層次預(yù)警。
[Abstract]:In the process of underground mining construction, when the internal stress balance of rock mass is destroyed, the rock mass will fall down and collapse, which will threaten the safety of the construction personnel.Therefore, it is necessary to take certain measures to strengthen the safety of underground construction environment.Although some underground mining environment is equipped with microseismic monitoring system imported from abroad, because of high price, inconvenience of maintenance and high maintenance cost, the microseismic monitoring system can not be popularized and applied as abroad.At present, the microseismic monitoring system in foreign countries also needs staff to carry out manual identification signals from PC, after a series of processing, such as recording and sorting, can we carry out subsequent analysis, and get the fracture situation of the measured rock mass, and the link is quite complex.And it takes a long time to warn in time.The purpose of the microseismic monitoring system studied in this paper is to reduce the workload of the field construction personnel, collect and analyze the data in time, and make the system more intelligent.Through the investigation of the related microseismic monitoring project, a large number of microseismic signal data of rock mass rupture are obtained, and the characteristics of the microseismic signal are obtained by comparing the acoustic emission signal with the obtained data.According to the principle of acoustic emission detection, the nondestructive testing scheme based on microseismic signal is put forward by analyzing the data and the actual situation of mine rock mass, and the signal acquisition and conditioning circuit in the system is designed.Firstly, a piezoelectric accelerometer based on ULT2020 is selected and a preamplifier with adjustable gain is designed.Then a band-pass double quadratic elliptic function band-pass filter with a passband range of 100Hz ~ 2500Hz and pass band gain Kn100 is designed by combining the pass-band range of microseismic signal with the principle of active band-pass filter, so as to improve the accuracy of effective signal pickup.Through the simulation of the circuit and the results of tolerance analysis, it can be concluded that the filter can meet the design requirements of the system.In the use of practical circuit board testing, the main component layout is unreasonable, waveform effect is not ideal.Finally, the signal is collected and counted by data acquisition card (EM9636B/BD) with bus type USB and Ethernet. In the selection of counting and warning value, the relationship between the number of microseismic events obtained by microseismic monitoring and the internal damage of rock mass is analyzed.In this paper, an intelligent early warning scheme, namely color level early warning, is proposed.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD326

【參考文獻】

相關(guān)期刊論文 前8條

1 姚福安;徐衍亮;;高性能多階有源帶通濾波器設(shè)計[J];電子測量與儀器學報;2005年02期

2 黨保全;劉超;;新莊孜礦微震監(jiān)測系統(tǒng)的傳感器安裝技術(shù)探討[J];煤礦開采;2010年02期

3 韓良;王新勝;張磊;范晶;;一種有源帶通濾波器[J];微處理機;2009年01期

4 林春方;;一種高性能的雙二次型有源帶通濾波器的研制[J];皖西學院學報;2006年05期

5 任伯峰;陳雷;劉百堅;張志巍;;電壓比較器在檢測系統(tǒng)中的應(yīng)用[J];儀表技術(shù);2010年10期

6 逄煥東,姜福興;微地震監(jiān)測中傳感器的布置方法[J];有色金屬(礦山部分);2003年06期

7 唐紹輝;潘懿;黃英華;吉學文;;深井礦山地壓災(zāi)害微震監(jiān)測技術(shù)應(yīng)用研究[J];巖石力學與工程學報;2009年S2期

8 殷志強;李夕兵;金解放;賀顯群;杜坤;;圍壓卸載下高應(yīng)力巖石動力擾動的破壞特性(英文)[J];Transactions of Nonferrous Metals Society of China;2012年01期

相關(guān)碩士學位論文 前3條

1 胡靜云;特大復(fù)雜采空區(qū)穩(wěn)定性微震監(jiān)測技術(shù)理論與應(yīng)用研究[D];長沙礦山研究院;2011年

2 何建平;巖體聲發(fā)射波形分析及噪聲識別技術(shù)研究[D];西南科技大學;2007年

3 劉宗良;全集成有源濾波器設(shè)計技術(shù)的研究[D];天津大學;2008年

，

本文編號：1705335