云南易門銅廠礦床三維地質(zhì)建模及資源儲量估算
發(fā)布時間：2019-05-16 17:23
【摘要】：礦床的三維地質(zhì)建模在國內(nèi)雖起步較晚,但隨著三維礦業(yè)軟件和地質(zhì)統(tǒng)計學(xué)軟件系統(tǒng)的逐漸發(fā)展和完善,其在礦業(yè)領(lǐng)域得到廣泛應(yīng)用,并已成為現(xiàn)代數(shù)字礦山研究與建設(shè)的重要內(nèi)容。同時,利用三維地質(zhì)建模成果,深入研究礦床尺度的礦化富集規(guī)律,也是當(dāng)前礦床學(xué)研究的新方向。本文以云南易門縣銅廠銅礦床為研究對象,通過全面收集礦區(qū)地質(zhì)資料和系統(tǒng)開展礦床地質(zhì)調(diào)查,在查明礦區(qū)成礦地質(zhì)條件、礦化類型及其空間分布規(guī)律的基礎(chǔ)上,應(yīng)用礦床三維可視化理論與技術(shù),并基于DIMINE三維礦業(yè)軟件,開展礦區(qū)地質(zhì)數(shù)據(jù)庫、三維地質(zhì)模型和Cu品位變異函數(shù)模型研究。通過塊段模型和品位估值模型的構(gòu)建,選用普通克里格法及距離冪次反比法,對礦床的資源儲量重新進行估算。主要取得成果的如下：(1)通過對礦區(qū)已有空間數(shù)據(jù)和二維矢量圖件等圖文數(shù)據(jù)資料分類及篩選,補充導(dǎo)入55條勘探線中91個鉆孔工程和50個坑探工程的15716個樣品數(shù)據(jù),并對各類文件進行有效性校驗和合并,創(chuàng)建礦區(qū)地質(zhì)數(shù)據(jù)庫。在此基礎(chǔ)上,通過布爾運算,構(gòu)建了礦區(qū)較為完整的地形模型及斷層、地層和礦體的三維實體模型,實現(xiàn)礦區(qū)地質(zhì)信息的三維可視化。(2)對礦區(qū)內(nèi)已有的15716個原始Cu品位數(shù)據(jù),按照樣長組合后進行統(tǒng)計分析,得知：礦區(qū)組合樣品Cu品位分布范圍主體集中于0-0.3%之間,平均值0.173%,最大值2.78%,變化系數(shù)104.04%,顯示礦床低品位但品位變化較均勻的特點；組合樣Cu品位服從對數(shù)正態(tài)分布,適宜選擇普通克里格法進行品位推估。(3)基于地質(zhì)統(tǒng)計學(xué)理論,創(chuàng)建了銅廠銅礦體Cu品位變異函數(shù)模型,分析得出礦體中Cu品位各向異性比為9：8：10(走向：傾向：垂向)。其中,Cu沿走向方向的變化較傾向方向及厚度方向上更為顯著,且結(jié)構(gòu)性最差,礦體受地層控制作用明顯,礦化表現(xiàn)出明顯的分帶性和貧富礦交替出現(xiàn)的規(guī)律性。(4)結(jié)合地層厚度DTM模型、斷層實體模型及礦化類型空間分布關(guān)系分析,認(rèn)為：礦區(qū)落雪組含礦層“兩凹夾一隆”的構(gòu)造格局與礦化強度分區(qū)有密切聯(lián)系；礦區(qū)南段的銅廠式沉積-成巖型銅礦體嚴(yán)格受地層控制,穩(wěn)定性較好,含礦層厚度與礦體厚度及Cu品位呈正相關(guān)；礦區(qū)北段(新莊-大尖山礦段)的尖山式熱液脈型銅礦體穿層性明顯,礦化主要沿F1斷裂帶分布,連續(xù)性較差；礦區(qū)中部的礦體段同時受地層和構(gòu)造作用控制,對應(yīng)沉積-成巖型+熱液脈型礦化疊加地段,是高品位礦體分布的主要部位。(5)在建立以礦體模型為約束的塊段模型的基礎(chǔ)上,構(gòu)建了Cu品位模型。模型顯示：以Cu=0.2%作為礦體的邊界品位時,礦化的連續(xù)性較好；Cu品位在≥0.4%時,礦化開始不連續(xù)�？傮w看,隨著Cu品位級別增加,約束后的品位塊段模型呈現(xiàn)出面狀→線帶狀→點帶狀分布的變化趨勢,總體走向與礦區(qū)含礦地層及主干斷層的走向一致,顯示礦化既受地層控制,又受構(gòu)造控制的基本特征。表明銅廠礦床為低品位礦體連續(xù)性較好、高品位礦體連續(xù)性較差的銅礦床。(6)基于DIMINE三維軟件的地質(zhì)模塊,選用普通克里格法及距離冪次反比法,分別以Cu品位0.2%、0.2-0.4%、0.4-3.0%為邊界,對礦區(qū)31～34號勘探線范圍內(nèi)不同類型資源儲量進行估算,其中,Cu≥0.2%的(332+333+334)銅礦石量約8840萬噸,銅金屬量約24.7萬噸：Cu=0.2-0.4%品級范圍的礦石量和銅金屬量分別占總資源量的93.91%和88.97%,Cu≥0.4%品級范圍的礦石量和銅金屬量僅占總資源量的6.09%和11.03%。說明本礦床為典型的以低品位礦為主的中型銅礦床。本研究成果為礦區(qū)實現(xiàn)三維可視化動態(tài)管理奠定了基礎(chǔ)。
[Abstract]:The three-dimensional geological modeling of the deposit is very late in China, but with the development and perfection of the three-dimensional mining software and the geostatistical software system, it has been widely used in the field of mining, and has become an important part of the research and construction of the modern digital mine. At the same time, using the results of three-dimensional geological modeling, the mineralization and enrichment law of the deposit scale is studied, and the new direction of the current ore deposit study is also studied. Based on the comprehensive collection of the geological data of the mining area and the geological survey of the deposit, the three-dimensional visualization theory and technology of the deposit are used to study the ore-forming geological conditions, the types of mineralization and the spatial distribution of the deposit, based on the investigation of the geological conditions, the types of mineralization and the spatial distribution of the deposit, The model of geological database, three-dimensional geological model and Cu-grade variation function model of mining area is studied based on DIMEINE three-dimensional mining software. Through the construction of the block segment model and the grade estimation model, the common Kriging method and the distance power inverse ratio method are adopted to re-estimate the resource reserves of the deposit. The main achievements are as follows: (1)15716 sample data of 91 drilling projects and 50 pit exploration projects in the 55 exploration lines are supplemented by the classification and selection of the data and text data of the existing spatial data and the two-dimensional vector map of the mining area, And the validity check and the combination of various documents are carried out, and the geological database of the mining area is created. On this basis, through the Boolean operation, the complete terrain model of the mining area and the three-dimensional solid model of the fault, the formation and the ore body are constructed, and the three-dimensional visualization of the geological information of the mining area is realized. (2)15716 original Cu grade data in the mining area are analyzed and analyzed according to the sample length, and it is found that the main body of the Cu-grade distribution range of the combined sample of the mining area is in the range of 0-0.3%, the average value is 0.173%, the maximum value is 2.78%, the variation coefficient is 104.04%, The characteristics of the low grade of the deposit and the change of the grade are shown, the Cu grade of the composition is subject to the log normal distribution, and the general Kriging method is suitable for evaluating the grade. (3) Based on the geostatistics theory, the Cu-grade variation function model of the copper-plant copper ore body was established, and the Cu-grade anisotropy ratio in the ore body was analyzed to be 9:8:10 (trend: orientation: vertical). Among them, the change of Cu in the direction of direction is more significant in the direction and thickness direction, and the structure is the worst. The ore body is obviously affected by the formation control, and the mineralization shows the regularity of the alternate occurrence of the rich and poor. (4) Based on the analysis of the relationship between the formation thickness DTM model, the fault model of the fault and the spatial distribution of the mineralization type, it is concluded that the structural pattern of the "two-concave one-on-one" of the ore-bearing layer in the snow-falling group in the mining area is closely related to the mineralization intensity partition, and the copper-plant type-sedimentary-diagenetic copper deposit in the south section of the mining area is strictly controlled by the formation. The stability is good, and the thickness of the ore-bearing layer is positively related to the thickness of the ore body and the Cu grade. The ore body segment in the middle of the mining area is controlled by the formation and the tectonism, and the corresponding sedimentary-diagenetic type + hydrothermal vein type mineralization and superposition section is the main part of the high-grade ore body distribution. (5) The Cu-grade model is built on the basis of building a block model with the orebody model as a constraint. The model shows that when Cu = 0.2% is the boundary grade of the ore body, the continuity of the mineralization is good; when the Cu grade is 0.4%, the mineralization is not continuous. As a whole, with the increase of the grade of Cu, the modified grade block model presents the trend of the strip-like distribution of the strip-like distribution in the surface-like structure, and the overall trend is consistent with the trend of the ore-bearing formation and the main fault in the mining area, and shows that the mineralization is controlled by the formation and is controlled by the structure. The copper deposit is a kind of copper deposit with good continuity and poor continuity of high grade ore body. (6) based on the geological module of the DIAMINE three-dimensional software, the common Kriging method and the distance power inverse ratio method are selected, the Cu-grade 0.2%, the 0.2-0.4% and the 0.4-3.0% are respectively used as the boundary, and the different types of resource reserves in the exploration line range of the mining areas 31 to 34 are estimated, The amount of Cu = 0.2% (332 + 333 + 334) copper ore is about 8840 million tons, and the amount of copper metal is about 247,000 tons: Cu = 0.2-0.4% of the grade of the ore and the amount of copper metal account for 93.91% and 88.97% of the total resources, respectively, and the amount of ore and copper metal in the range of 0.4% of Cu is only 6.09% and 11.03% of the total resources. It is indicated that this deposit is a typical medium-sized copper deposit with low grade ore. The research result lays a foundation for the dynamic management of three-dimensional visualization in the mining area.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.41
本文編號：2478441
[Abstract]:The three-dimensional geological modeling of the deposit is very late in China, but with the development and perfection of the three-dimensional mining software and the geostatistical software system, it has been widely used in the field of mining, and has become an important part of the research and construction of the modern digital mine. At the same time, using the results of three-dimensional geological modeling, the mineralization and enrichment law of the deposit scale is studied, and the new direction of the current ore deposit study is also studied. Based on the comprehensive collection of the geological data of the mining area and the geological survey of the deposit, the three-dimensional visualization theory and technology of the deposit are used to study the ore-forming geological conditions, the types of mineralization and the spatial distribution of the deposit, based on the investigation of the geological conditions, the types of mineralization and the spatial distribution of the deposit, The model of geological database, three-dimensional geological model and Cu-grade variation function model of mining area is studied based on DIMEINE three-dimensional mining software. Through the construction of the block segment model and the grade estimation model, the common Kriging method and the distance power inverse ratio method are adopted to re-estimate the resource reserves of the deposit. The main achievements are as follows: (1)15716 sample data of 91 drilling projects and 50 pit exploration projects in the 55 exploration lines are supplemented by the classification and selection of the data and text data of the existing spatial data and the two-dimensional vector map of the mining area, And the validity check and the combination of various documents are carried out, and the geological database of the mining area is created. On this basis, through the Boolean operation, the complete terrain model of the mining area and the three-dimensional solid model of the fault, the formation and the ore body are constructed, and the three-dimensional visualization of the geological information of the mining area is realized. (2)15716 original Cu grade data in the mining area are analyzed and analyzed according to the sample length, and it is found that the main body of the Cu-grade distribution range of the combined sample of the mining area is in the range of 0-0.3%, the average value is 0.173%, the maximum value is 2.78%, the variation coefficient is 104.04%, The characteristics of the low grade of the deposit and the change of the grade are shown, the Cu grade of the composition is subject to the log normal distribution, and the general Kriging method is suitable for evaluating the grade. (3) Based on the geostatistics theory, the Cu-grade variation function model of the copper-plant copper ore body was established, and the Cu-grade anisotropy ratio in the ore body was analyzed to be 9:8:10 (trend: orientation: vertical). Among them, the change of Cu in the direction of direction is more significant in the direction and thickness direction, and the structure is the worst. The ore body is obviously affected by the formation control, and the mineralization shows the regularity of the alternate occurrence of the rich and poor. (4) Based on the analysis of the relationship between the formation thickness DTM model, the fault model of the fault and the spatial distribution of the mineralization type, it is concluded that the structural pattern of the "two-concave one-on-one" of the ore-bearing layer in the snow-falling group in the mining area is closely related to the mineralization intensity partition, and the copper-plant type-sedimentary-diagenetic copper deposit in the south section of the mining area is strictly controlled by the formation. The stability is good, and the thickness of the ore-bearing layer is positively related to the thickness of the ore body and the Cu grade. The ore body segment in the middle of the mining area is controlled by the formation and the tectonism, and the corresponding sedimentary-diagenetic type + hydrothermal vein type mineralization and superposition section is the main part of the high-grade ore body distribution. (5) The Cu-grade model is built on the basis of building a block model with the orebody model as a constraint. The model shows that when Cu = 0.2% is the boundary grade of the ore body, the continuity of the mineralization is good; when the Cu grade is 0.4%, the mineralization is not continuous. As a whole, with the increase of the grade of Cu, the modified grade block model presents the trend of the strip-like distribution of the strip-like distribution in the surface-like structure, and the overall trend is consistent with the trend of the ore-bearing formation and the main fault in the mining area, and shows that the mineralization is controlled by the formation and is controlled by the structure. The copper deposit is a kind of copper deposit with good continuity and poor continuity of high grade ore body. (6) based on the geological module of the DIAMINE three-dimensional software, the common Kriging method and the distance power inverse ratio method are selected, the Cu-grade 0.2%, the 0.2-0.4% and the 0.4-3.0% are respectively used as the boundary, and the different types of resource reserves in the exploration line range of the mining areas 31 to 34 are estimated, The amount of Cu = 0.2% (332 + 333 + 334) copper ore is about 8840 million tons, and the amount of copper metal is about 247,000 tons: Cu = 0.2-0.4% of the grade of the ore and the amount of copper metal account for 93.91% and 88.97% of the total resources, respectively, and the amount of ore and copper metal in the range of 0.4% of Cu is only 6.09% and 11.03% of the total resources. It is indicated that this deposit is a typical medium-sized copper deposit with low grade ore. The research result lays a foundation for the dynamic management of three-dimensional visualization in the mining area.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.41
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