本文選題：采場底板 + 采動變形　； 參考：《安徽理工大學》2017年碩士論文

【摘要】：煤炭是我國的重要的基礎能源和化工原料。隨著煤炭資源開采深度和開采范圍將不斷向深部延伸和擴大,其開采條件也隨之改變,礦井水害防治將面臨更多的技術難題。研究底板水威脅煤層安全開采的問題,對充分、有效的開發(fā)煤炭資源、實現(xiàn)老礦挖潛、新老礦井合理接替以及可持續(xù)發(fā)展我國的煤炭工業(yè)具有重要的現(xiàn)實意義。論文通過開展底板變形破壞理論、技術的調(diào)研和文獻檢索,了解與掌握底板變形破壞研究現(xiàn)狀、重要學術成果和發(fā)展趨勢;利用分布式光纖線性測量優(yōu)點,開展分布式光纖室內(nèi)巖石壓裂試驗,探究分布式光纖在巖石破裂演化測試的可行性和可靠性;基于室內(nèi)試驗基礎,結合工程現(xiàn)場地質(zhì)條件構建煤層底板鉆孔光纖傳感監(jiān)測系統(tǒng),根據(jù)工作面不同回采進度條件下底板巖層應變場參數(shù)的響應,測試與分析煤層底板破壞與開采過程在時間和空間變化的關系。研究獲得分布式光纖測試技術巖體破裂變形測試中對比MTS測試系統(tǒng)結果誤差為13.2%。同時,分布式光纖測試技術現(xiàn)場原位實測獲得采場底板在采動過程的形變特征,動態(tài)獲得底板破壞應力場狀態(tài),獲得采場底板破壞區(qū)深度范圍為0-7.2m,擾動影響深度范圍7.2-26.3m,超前應力影響范圍36m。研究分布式光纖對于巖體破裂演化測試的可行性和有效性,為巖體宏觀損傷演化和現(xiàn)場工程巖體的宏觀斷裂失穩(wěn)提供借鑒和思路。工程應用中實現(xiàn)對底板巖層變形破壞的精細化判別與定量解釋。新技術的應用有利于全面、充分認識采場底板變形破壞及巖層位移特征,對礦井底板水害防治、采場空間穩(wěn)定性有著重要實踐意義和指導意義。但技術應用過程中在施工、耦合、解釋等方面依然存在不足,需要進一步深入研究。
[Abstract]:Coal is an important basic energy and chemical raw material in China. With the coal mining depth and mining scope will continue to extend and expand to the deep, the mining conditions will also change, the mine water disaster prevention will face more technical problems. It is of great practical significance to study the problem that floor water threatens the safe mining of coal seams, which is of great practical significance for the full and effective exploitation of coal resources, the realization of tapping potential of old mines, the reasonable replacement of new and old mines and the sustainable development of coal industry in our country. Through developing the theory of bottom plate deformation and failure, technical investigation and literature retrieval, the paper understands and grasps the present situation, important academic achievements and development trend of bottom plate deformation and failure, utilizes the advantages of distributed optical fiber linear measurement, and makes use of the advantages of distributed optical fiber linear measurement. In order to explore the feasibility and reliability of distributed optical fiber in rock fracture evolution test, a fiber optic sensing monitoring system for coal seam floor drilling is constructed based on laboratory test and engineering geological conditions. According to the response of the strain field parameters of the floor strata under different mining schedule conditions, the relationship between the failure of coal seam floor and the change of time and space in the mining process is tested and analyzed. In this paper, the error of the MTS test system in the distributed optical fiber testing technique for rock mass fracture deformation measurement is 13. 2%. At the same time, the in-situ measurement of distributed optical fiber testing technology obtained the deformation characteristics of the stope floor in the mining process, and the dynamic state of the failure stress field of the floor was obtained. The depth range of failure zone of stope floor is 0-7.2 m, the influence depth range of disturbance is 7.2-26.3 m, and the influence range of leading stress is 36 m. The feasibility and effectiveness of distributed optical fiber for rock mass fracture evolution testing are studied, which provides a reference for macroscopic damage evolution of rock mass and macroscopic fracture instability of field engineering rock mass. In engineering application, the detailed discrimination and quantitative interpretation of deformation and failure of floor rock are realized. The application of the new technology is beneficial to the comprehensive understanding of the deformation and failure of the stope floor and the characteristics of the rock displacement. It is of great practical significance and guiding significance for the prevention and control of the mine floor water hazard and the stope spatial stability. However, there are still shortcomings in construction, coupling and interpretation in the process of technology application, which need further study.
【學位授予單位】：安徽理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TD745.2

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