本文選題：臨界注液強(qiáng)度 + 相關(guān)距離��； 參考：《江西理工大學(xué)》2017年碩士論文

【摘要】：離子型稀土礦原地浸礦工藝的注液強(qiáng)度無(wú)統(tǒng)一規(guī)范,開(kāi)采過(guò)程山體滑坡頻發(fā)。研究礦體的力學(xué)參數(shù)、分布規(guī)律,并且將礦體力學(xué)參數(shù)和分布類型應(yīng)用于礦山臨界注液強(qiáng)度的計(jì)算,對(duì)原地浸礦工藝經(jīng)濟(jì)性和安全性有重要意義�；诮y(tǒng)計(jì)規(guī)律測(cè)試土體力學(xué)參數(shù)具有測(cè)試結(jié)果準(zhǔn)確和經(jīng)濟(jì)快捷等優(yōu)點(diǎn)。在贛南某稀土礦山非等間距布置6個(gè)測(cè)點(diǎn),共計(jì)18個(gè)測(cè)試孔,通過(guò)旁壓試驗(yàn)和鉆孔剪切試驗(yàn)測(cè)試了離子型稀土礦體的旁壓模量、黏聚力、內(nèi)摩擦角和極限壓力等力學(xué)參數(shù),運(yùn)用經(jīng)典統(tǒng)計(jì)學(xué)方法和地質(zhì)學(xué)統(tǒng)計(jì)方法分析礦體力學(xué)參數(shù)的空間變異性。假設(shè)由18個(gè)測(cè)試孔的測(cè)試數(shù)據(jù)計(jì)算得到各力學(xué)參數(shù)為真值,若15%為工程可接受的誤差,運(yùn)用經(jīng)典統(tǒng)計(jì)學(xué)方法分析和地質(zhì)統(tǒng)計(jì)學(xué)方法分析最優(yōu)測(cè)試尺度和點(diǎn)數(shù)。旁壓試驗(yàn)記錄的壓力和位移關(guān)系結(jié)合有限法反分析得到礦體的鄧肯-張模型參數(shù)。測(cè)試獲得的礦體力學(xué)參數(shù)、地形參數(shù),運(yùn)用GeoStudio模擬出礦山臨界注液強(qiáng)度。研究得到結(jié)果:1.試驗(yàn)礦塊內(nèi)礦體的黏聚力和旁壓模量屬于強(qiáng)變異,黏聚力的變異系數(shù)為0.48,旁壓模量的變異系數(shù)為0.36;極限壓力屬于中等變異,變異系數(shù)0.21;內(nèi)摩擦角屬于弱變異性,其變異系數(shù)為0.067。2.對(duì)于試驗(yàn)礦塊,在45 m范圍內(nèi)均勻布置5個(gè)測(cè)點(diǎn),測(cè)試結(jié)果可有效估計(jì)礦體內(nèi)黏聚力、旁壓模量和極限壓力的平均值和變異系數(shù)。3.礦體的鄧肯-張模型參數(shù)是k=1331.7,n=2.775,r_f=0.516,k_b=563,m=0.154,c=22.2,φ=31.7。4.該離子型稀土礦山的臨界注液強(qiáng)度為單個(gè)注液孔0.41m~3/d。
[Abstract]:The injection strength of ion type rare earth ore in situ leaching process is not uniform and the landslide occurs frequently during mining.It is of great significance to study the mechanical parameters and distribution law of orebody, and to apply the mechanical parameters and distribution types of orebody to the calculation of critical injection strength of mine, which is of great significance to the economy and safety of in-situ leaching process.The measurement of soil mechanical parameters based on statistical law has the advantages of accuracy and economy.In a rare earth mine in south Jiangxi Province, 6 measuring points with 18 test holes were arranged. The mechanical parameters such as pressure-pressure modulus, cohesion force, internal friction angle and limit pressure were measured by pressure-pressure test and borehole shear test.The spatial variability of mechanical parameters of ore body is analyzed by classical statistical method and geological statistical method.Assuming that the test data of 18 test holes are the true values of each mechanical parameter, if 15% is the acceptable error of engineering, the optimal test scale and number of points are analyzed by classical statistical method and geostatistical method.The relationship between pressure and displacement of the pressure-pressure test records is analyzed by the finite method. The Duncan-Chang model parameters of the orebody are obtained.The mechanical parameters and topographic parameters of ore body are measured and the critical liquid injection intensity of mine is simulated by GeoStudio.The result of the study is 1: 1.The cohesion and pressure-pressured modulus of ore bodies in the test block are strongly variable, the coefficient of variation of cohesion is 0.48, the coefficient of variation of modulus of pressure-pressure is 0.36, the coefficient of variation of limit pressure is moderate, the coefficient of variation is 0.21, and the coefficient of variation of internal friction angle is 0.067.2.For the test ore block, five measuring points are arranged evenly within 45 m. The results of the test can effectively estimate the average value and variation coefficient of the cohesion, the modulus of pressure-pressure and the limit pressure of the ore body, as well as the coefficient of variation.The Duncan-Chang model parameters of the orebody are as follows: K _ (1331.7N) ~ (2.775) ~ (?) ~ (?) ~ (?) _ _ _The critical liquid injection intensity of the ion rare earth mine is 0.41 m ~ (-1) m ~ (-1) 路d ~ (-1) 路d ~ (-1).
【學(xué)位授予單位】：江西理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD865

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