本文選題：三維模型 + 分布式光纖傳感技術(shù)��； 參考：《西安科技大學(xué)》2017年碩士論文

【摘要】：三維相似模擬試驗(yàn)是研究采場礦壓顯現(xiàn)及覆巖移動(dòng)變形特征的重要方法之一,然而三維相似模型厚度大,模型內(nèi)部巖層的移動(dòng)變形特征無法用肉眼看見,無法知道采場覆巖移動(dòng)變形的規(guī)律,因此必須借助其他方法對模型內(nèi)部巖層的移動(dòng)變形進(jìn)行監(jiān)測。本文介紹了脈沖預(yù)泵浦布里淵光時(shí)域分析技術(shù)(Pulse-PrePump Brillouin Optical Time Domain Analysis,PPP-BOTDA)的傳感原理,分析了光纖布里淵頻移與溫度和應(yīng)變的關(guān)系,給出了分布式光纖監(jiān)測覆巖變形的可行性;同時(shí)分析了垂直光纖的布里淵頻移曲線變化特征與覆巖移動(dòng)變形特征的關(guān)系,提出了基于垂直的分布式光纖的判別三維相似試驗(yàn)中模擬工作面的來壓情況的方法;分析了垂直光纖的布里淵頻移曲線的特征,提出了垂直光纖確定三維模擬內(nèi)部的覆巖破壞變形高度和垮落帶高度的方法。為了驗(yàn)證上述方法的正確性,通過以在實(shí)驗(yàn)室模擬出現(xiàn)場工作面開采過程中上覆巖層移動(dòng)變形特征為目標(biāo),設(shè)計(jì)三維相似材料模擬試驗(yàn),構(gòu)建了PPP-BOTDA分布式光纖傳感監(jiān)測系統(tǒng),同時(shí)為了驗(yàn)證分布式光纖的監(jiān)測結(jié)果的準(zhǔn)確性,自行設(shè)計(jì)一套三維模型內(nèi)部位移測量裝置,并將這兩套監(jiān)測系統(tǒng)運(yùn)用到模擬工作面上覆巖層中對應(yīng)覆巖移動(dòng)變形進(jìn)行監(jiān)測。三維相似模擬試驗(yàn)結(jié)果表明,基于PPP-BOTDA的分布式光纖傳感技術(shù)實(shí)現(xiàn)了對三維模型模擬工作面的來壓位置確定,同時(shí)確定了三維模型內(nèi)部破壞變形高度和垮落帶高度,該技術(shù)為了人類研究提供了一雙能觀測三維模型內(nèi)部的變形的“眼睛”,同時(shí)為了能使得上述信息能快速獲取,自行開發(fā)了分布式光纖數(shù)據(jù)處理分析系統(tǒng),該系統(tǒng)的研發(fā)使得試驗(yàn)數(shù)據(jù)處理能夠快速顯示,及時(shí)掌握了覆巖內(nèi)部變形情況,改變了以往“先試驗(yàn)-后處理”的試驗(yàn)?zāi)Ｊ?實(shí)現(xiàn)試驗(yàn)和數(shù)據(jù)處理同步進(jìn)行處理,該系統(tǒng)的開發(fā)為這雙“眼睛”提高了觀測效率,為這項(xiàng)技術(shù)現(xiàn)場應(yīng)用提供指導(dǎo)意義。
[Abstract]:Three-dimensional similarity simulation test is one of the important methods to study the characteristics of strata pressure and overlying rock movement and deformation. However, the thickness of three-dimensional similarity model is so large that the characteristics of movement and deformation of strata inside the model can not be seen with the naked eye.It is impossible to know the law of strata movement and deformation in stope, so it is necessary to monitor the movement and deformation of strata inside the model by other methods.In this paper, the sensing principle of Pulse-Preump Brillouin Optical Time Domain Analysis (PPP-BOTDAA) is introduced, the relationship between Brillouin frequency shift and temperature and strain is analyzed, and the feasibility of monitoring overburden deformation by distributed optical fiber is given.At the same time, the relationship between Brillouin frequency shift curve of vertical optical fiber and the deformation characteristics of overburden is analyzed, and the method of discriminating the pressure of working face in 3D similar test based on vertical distributed fiber is put forward.The characteristics of Brillouin frequency shift curve of vertical fiber are analyzed, and a method for determining the height of deformation and collapse zone of collapse zone in 3D simulation is put forward.In order to verify the correctness of the above methods, a PPP-BOTDA distributed optical fiber sensor monitoring system is constructed by using the object of simulating the movement and deformation characteristics of the overlying strata during the mining process of the working face in the laboratory, and designing a three-dimensional simulation test of the similar material.At the same time, in order to verify the accuracy of the monitoring results of distributed optical fiber, a set of internal displacement measurement device of 3D model is designed, and the two monitoring systems are applied to monitor the movement and deformation of overburden strata in simulated working face.The experimental results of 3D similarity simulation show that the distributed optical fiber sensing technology based on PPP-BOTDA can determine the pressure position of 3D model simulation face and determine the height of internal failure deformation and collapse zone of 3D model.This technique provides a pair of "eyes" that can observe the deformation inside the three-dimensional model for human research. In order to make the above information available quickly, a distributed optical fiber data processing and analysis system is developed.With the development of the system, the test data processing can be quickly displayed, the deformation of overburden rock can be grasped in time, the former test mode of "first test and then processing" has been changed, and the simultaneous processing of test and data processing has been realized.The development of the system improves the observation efficiency and provides guidance for the field application of this technique.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD325.4

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 柴敬;錢云云;王豐年;袁強(qiáng);張丁丁;;三維模型內(nèi)部位移測試裝置及其應(yīng)用[J];地下空間與工程學(xué)報(bào);2016年S2期

2 柴敬;袁強(qiáng);李毅;張丁丁;劉奇;;采場覆巖變形的分布式光纖檢測試驗(yàn)研究[J];巖石力學(xué)與工程學(xué)報(bào);2016年S2期

3 王鵬;李國棟;梁俊林;徐波;;淺埋近距離煤層群開采三維相似模擬試驗(yàn)[J];內(nèi)蒙古煤炭經(jīng)濟(jì);2016年10期

4 柴敬;孫亞運(yùn);錢云云;宋軍;馬偉超;李毅;;基于FBG-BOTDA聯(lián)合感測的巖層運(yùn)動(dòng)試驗(yàn)研究[J];西安科技大學(xué)學(xué)報(bào);2016年01期

5 王紅偉;伍永平;曹沛沛;張文忠;解盤石;;大傾角煤層開采大型三維可加載相似模擬試驗(yàn)[J];煤炭學(xué)報(bào);2015年07期

6 樸春德;施斌;魏廣慶;于霖;陳恩玉;;采動(dòng)覆巖變形BOTDA分布式測量及離層分析[J];采礦與安全工程學(xué)報(bào);2015年03期

7 柴敬;王正帥;袁強(qiáng);李毅;王帥;李廷博;;BOTDA在巖層移動(dòng)相似材料模擬試驗(yàn)中的應(yīng)用[J];煤炭科學(xué)技術(shù);2015年01期

8 賀佑國;葉旭東;王震;;關(guān)于煤炭工業(yè)“十三五”規(guī)劃的思考[J];煤炭經(jīng)濟(jì)研究;2015年01期

9 劉康;侯會(huì)偉;武泉林;;堅(jiān)硬頂板工作面覆巖運(yùn)動(dòng)規(guī)律數(shù)值模擬[J];現(xiàn)代礦業(yè);2015年01期

10 張丹;張平松;施斌;王宏憲;李長圣;;采場覆巖變形與破壞的分布式光纖監(jiān)測與分析[J];巖土工程學(xué)報(bào);2015年05期

相關(guān)博士學(xué)位論文 前2條

1 何建平;全尺度光纖布里淵分布式監(jiān)測技術(shù)及其在土木工程的應(yīng)用[D];哈爾濱工業(yè)大學(xué);2010年

2 劉迪仁;長距離分布式布里淵散射光纖傳感技術(shù)研究[D];浙江大學(xué);2005年

，

本文編號：1754961