【摘要】：隨著我國淺部礦產(chǎn)資源日益減少以及采掘設(shè)備的大型化,礦產(chǎn)資源的^u懫逐漸向深部和大規(guī)模兩個方向發(fā)展,深部礦體所處的高地應(yīng)力、高滲透壓以及高地?zé)岬牟涣紬l件和大規(guī)模開采的劇烈擾動都嚴重威脅到采場圍巖的穩(wěn)定性。本文依托深部鐵礦床超大規(guī)模開采過程圍巖破裂失穩(wěn)演化規(guī)律及動態(tài)調(diào)控機制研究科研課題,以設(shè)計開采深度為900m,年產(chǎn)量為2700萬噸的馬城鐵礦為背景礦山,通過室內(nèi)試驗、數(shù)值模擬以及物理相似模擬實驗等方法,對馬城鐵礦深部大規(guī)模開采過程中采場圍巖的變形破壞特征進行研究,主要研究內(nèi)容和成果如下:1)在室內(nèi)進行礦、巖的基本巖石力學(xué)實驗以及物理模擬相似材料配比試驗,獲取礦巖抗壓強度、抗拉強度、粘聚力以及內(nèi)摩擦角等基本參數(shù),確定礦巖物理相似材料的配,為后續(xù)的數(shù)值模擬和物理模擬研究提供基本參數(shù);2)在充分了解礦山實際地質(zhì)概況和工程概況的基礎(chǔ)上,運用數(shù)值模擬的方法對深部采場開挖進行模擬,分析深部采場開挖前后,采場圍巖應(yīng)力位移時空演化規(guī)律以及塑性區(qū)的變化情況;3)選擇VIC-3D非接觸式全場應(yīng)變測量系統(tǒng)以及壓力盒等聯(lián)合監(jiān)測手段,利用YJ203大尺度相似材料加載模擬試驗臺,在預(yù)加載荷的作用下,對深度為900m的礦體進行了的深部大結(jié)構(gòu)參數(shù)采場開挖的相似模擬試驗。從宏觀和微觀上分析深部大規(guī)模開采過程中采場圍巖的變形破壞特征、應(yīng)力和位移的時空演化規(guī)律。結(jié)合數(shù)值模擬試驗以及相似材料模擬試驗的數(shù)據(jù)和成果,得到了馬城鐵礦深部大結(jié)構(gòu)參數(shù)采場圍巖應(yīng)力、位移以及變形破壞的規(guī)律,為礦山的安全生產(chǎn)提供一定的幫助。
[Abstract]:With the decreasing of shallow mineral resources in China and the large-scale development of mining equipment, the mineral resources are gradually developing towards deep and large scale, and the deep orebodies are under high ground stress. The stability of surrounding rock of stope is seriously threatened by high permeability pressure, bad condition of high geothermal and severe disturbance of large-scale mining. In this paper, based on the research on the evolution law of rock fracture instability and dynamic control mechanism during the super-large scale mining process of deep iron ore deposit, taking the design mining depth of 900m and the annual output of 27 million tons of Macheng Iron Mine as the background, the laboratory tests are carried out. The deformation and failure characteristics of surrounding rock in deep mining of Maicheng Iron Mine are studied by numerical simulation and physical similarity simulation. The main research contents and results are as follows: 1) the ore is carried out indoors. The basic rock mechanics experiment and the physical simulation similar material proportion test, obtains the ore rock compressive strength, the tensile strength, the cohesive force and the internal friction angle and so on basic parameter, determines the mineral rock physical similar material match, To provide the basic parameters for the subsequent numerical simulation and physical simulation research; 2) on the basis of fully understanding the actual geological and engineering situation of the mine, the deep stope excavation is simulated by numerical simulation method, and the deep stope excavation before and after excavation is analyzed. Spatial-temporal evolution of stress and displacement of surrounding rock and change of plastic zone in stope; 3) choosing the VIC-3D non-contact full-field strain measurement system and pressure box, and using the YJ203 large-scale similar material loading simulator, under the action of pre-loading. The similar simulation test of deep large structural parameter mining excavation was carried out for the orebody with depth of 900m. The characteristics of deformation and failure of surrounding rock in deep mining and the evolution of stress and displacement in time and space are analyzed from macro and micro aspects. Combined with the data and results of numerical simulation test and similar material simulation test, the rules of stress, displacement and deformation failure of surrounding rock in deep large structural parameters of Maicheng Iron Mine are obtained, which provide certain help for safe production of mine.
【學(xué)位授予單位】：華北理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD861.1;TD313

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