【摘要】：在煤礦安全開采中,巖體應(yīng)力狀態(tài)研究對揭示巷道圍巖應(yīng)力場的分布特征及演化規(guī)律和研究煤巖動(dòng)力災(zāi)害和巷道支護(hù)設(shè)計(jì)至關(guān)重要。本文以先研制傳感器和開發(fā)傳感系統(tǒng)后進(jìn)行現(xiàn)場應(yīng)用和效果評價(jià)為主線,依次進(jìn)行了光纖光柵鉆孔應(yīng)力計(jì)的設(shè)計(jì)與研制和光纖光柵采動(dòng)應(yīng)力監(jiān)測系統(tǒng)的開發(fā)、應(yīng)用和應(yīng)用效果驗(yàn)證。通過理論分析建立了鉆孔圍巖力學(xué)模型,對圍巖—鉆孔應(yīng)力計(jì)相互作用進(jìn)行力學(xué)分析,結(jié)果表明增加應(yīng)力計(jì)初始應(yīng)力和伸縮性能可以改善監(jiān)測精度。結(jié)合光纖光柵傳感原理和其傳感特性,對管狀結(jié)構(gòu)和囊狀結(jié)構(gòu)光纖光柵鉆孔應(yīng)力計(jì)進(jìn)行了結(jié)構(gòu)設(shè)計(jì)和性能測試,證明其初始應(yīng)力不足和伸縮性能不夠等缺陷的同時(shí)提出一種更優(yōu)的分級組合體結(jié)構(gòu)鉆孔應(yīng)力計(jì)。為了進(jìn)一步改善傳感效果,設(shè)計(jì)了一種“膜片結(jié)構(gòu)+連接桿”式光纖光柵壓力計(jì),通過性能測試和仿真分析證明其具有良好的線性度和工作重復(fù)性。基于光纖光柵鉆孔應(yīng)力計(jì)開發(fā)了一種光纖光柵采動(dòng)應(yīng)力監(jiān)測系統(tǒng),在開放化、集成化和智能化的設(shè)計(jì)理念下,完成了多平臺分工協(xié)作設(shè)計(jì)和模型設(shè)計(jì),將其分為了硬件系統(tǒng)和軟件系統(tǒng)并進(jìn)行了結(jié)構(gòu)設(shè)計(jì),使系統(tǒng)具有實(shí)時(shí)數(shù)據(jù)顯示和歷史信息查詢等特點(diǎn)。將系統(tǒng)用于現(xiàn)場巷道圍巖支承壓力監(jiān)測中,并用數(shù)值模擬得出巷道圍巖支承壓力分布曲線,將二者結(jié)果進(jìn)行比較得出:現(xiàn)場實(shí)測和模擬的巷道圍巖支承壓力分布趨勢相近,規(guī)律相似,以此證明了系統(tǒng)設(shè)計(jì)合理,性能穩(wěn)定可靠,達(dá)到了現(xiàn)場監(jiān)測的預(yù)期效果并實(shí)現(xiàn)了成功運(yùn)行。
[Abstract]:In the safe mining of coal mine, the study of rock mass stress state is very important to reveal the distribution characteristics and evolution law of surrounding rock stress field of roadway and to study the dynamic disaster of coal and rock and the design of roadway support. In this paper, the design and development of the fiber grating borehole stress meter and the monitoring system of the mining stress of the fiber grating are carried out according to the main line of the field application and the effect evaluation of the sensor and the sensor system. Application and effect verification. The mechanical model of borehole surrounding rock is established by theoretical analysis, and the mechanical analysis of the interaction between surrounding rock and borehole stressor is carried out. The results show that the accuracy of monitoring can be improved by increasing the initial stress and scalability of the stress meter. Based on the principle of fiber Bragg grating (FBG) sensing and its sensing characteristics, the structure design and performance test of fiber Bragg grating borehole stress meter with tubular structure and cystic structure are carried out. At the same time, it is proved that the initial stress is insufficient and the scalability is not enough. At the same time, a better borehole stress meter is proposed. In order to further improve the sensing effect, a kind of "diaphragm structure connecting rod" fiber grating manometer is designed, which is proved to have good linearity and repeatability by performance test and simulation analysis. Based on the fiber grating borehole stress meter, a fiber grating mining stress monitoring system is developed. Under the open, integrated and intelligent design concept, the multi-platform division of labor cooperation and model design are completed. The system is divided into hardware system and software system, and the structure is designed, which makes the system have the characteristics of real-time data display and historical information query. The system is used to monitor the supporting pressure of surrounding rock of roadway in the field, and the distribution curve of supporting pressure of surrounding rock of roadway is obtained by numerical simulation. By comparing the two results, it is concluded that the distribution trend of supporting pressure of surrounding rock of roadway measured on site is similar to that of simulation. The law is similar, which proves that the system design is reasonable, the performance is stable and reliable, the expected effect of field monitoring is achieved and the successful operation is realized.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP274;TD326

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