本文選題：礦體變化規(guī)律 + 變異函數(shù)　； 參考：《昆明理工大學》2016年碩士論文

【摘要】：云南省蒙自縣白牛廠銀多金屬礦床位于滇東南地區(qū),屬于超大型礦床,也是一個因為勘查工程布置不合理而影響開發(fā)的一個典型礦床。礦體的變化規(guī)律是決定勘查網(wǎng)度的重要因素,合理的勘查網(wǎng)度應該依據(jù)礦體變化規(guī)律研究結(jié)果來確定�？辈橄到y(tǒng)優(yōu)化主要內(nèi)容是在系統(tǒng)的分析礦體變化規(guī)律情況下,根據(jù)所確定的最佳勘查網(wǎng)度,對預測靶區(qū)進行合理工程布置,以達到對礦體的最佳勘探效果。隨著地質(zhì)統(tǒng)計學的不斷發(fā)展,變異函數(shù)已經(jīng)成為研究礦體變化規(guī)律的最重要的方法之一。本文通過系統(tǒng)的研究白牛廠礦體的變化規(guī)律,運用傳統(tǒng)方法對不同礦段進行了勘探類型劃分。并根據(jù)各礦段的不同特點,以變異函數(shù)為工具,分別構(gòu)建了主成礦元素在整個礦區(qū)及各礦段的品位變異函數(shù)模型,通過變程確定了合理的勘查網(wǎng)度。根據(jù)礦體的三維空間模型和勘查工程的關(guān)系,結(jié)合礦體變化規(guī)律和最優(yōu)勘查網(wǎng)度,確定了找礦靶區(qū)位置,設(shè)計了合理的勘探工程。主要成果如下：(1)白牛廠礦床的V1礦體的邊界形態(tài)、礦體厚度和品位變化性具有較大差異,在白羊-穿心洞礦段變化較大,較為復雜,在對門山-阿尾礦段變化相對較小。其礦體變化程度在勘查時被低估,并且未考慮其變化的不均勻性。經(jīng)過本次研究,白羊-穿心洞礦段屬于第Ⅱ勘查類型,而阿尾-對門山礦段屬于第Ⅰ勘查類型。(2)V1礦體雖然整體呈似層狀,但是在白羊-穿心洞礦段,由于斷層和褶皺的綜合作用,礦體邊界形態(tài)與其他部位相比較為復雜。礦體厚度變化總體來說相對穩(wěn)定,但是在褶皺形成的虛脫空間內(nèi)厚度較大。通過對主成礦元素的品位變化系數(shù)分析,Ag、Pb、Zn元素具有相似的分布規(guī)律,都具有空間變化較不均勻,從北西向南東逐漸減小的特點。(3)對礦山內(nèi)432個鉆探工程的6265個樣品數(shù)據(jù)進行地質(zhì)數(shù)據(jù)庫的建立,經(jīng)過樣品處理后進行統(tǒng)計分析�；诘刭|(zhì)統(tǒng)計學理論,以變異函數(shù)為主要工具,創(chuàng)建了不同礦段Ag、Pb、Zn元素品位變異函數(shù)模型。其中,三種主成礦元素的連續(xù)性在走向上最好,傾向次之,厚度方向最差。根據(jù)變異函數(shù)的變程,確定了不同礦段的最佳勘查網(wǎng)度,與傳統(tǒng)方法確定的勘查網(wǎng)度相比更加精確,建議白羊-穿心洞礦段勘查網(wǎng)度為50×30m,對門山-阿尾礦段因變化性較小,勘查網(wǎng)度可采用80×75m。(4)通過礦體三維立體模型結(jié)合厚度及品位變化規(guī)律,推測在穿心洞礦段和對門山礦段西南側(cè)可能隱伏有厚度較大品位較好礦體,但是根據(jù)探礦工程的三維立體圖看出,目前礦山在此處工程較少,不能很好揭露隱伏礦體,需要進一步在中段及地表增加工程,達到所需勘查網(wǎng)度。
[Abstract]:The BaiNiuchang silver polymetallic deposit in Mengzi County of Yunnan Province is located in the southeast of Yunnan Province. It belongs to a super large deposit and is also a typical deposit affected by the unreasonable arrangement of exploration engineering. The variation law of orebody is an important factor to determine the net degree of exploration, and the reasonable degree of prospecting net should be determined according to the results of the study on the variation law of orebody. The main content of the optimization of the exploration system is to make reasonable engineering arrangement of the predicted target area according to the optimum exploration net degree determined by the systematic analysis of the variation law of the orebody in order to achieve the best exploration effect on the orebody. With the development of geostatistics, variation function has become one of the most important methods to study the regularity of ore body change. Based on the systematic study of the change law of the Biniuchang ore body, the exploration types of different ore sections are divided by traditional methods in this paper. According to the different characteristics of each ore section and using the variation function as a tool, the model of the grade variation function of the main ore-forming elements in the whole mining area and each ore section is constructed, and the reasonable exploration net degree is determined by the variation range. According to the relationship between the three dimensional spatial model of ore body and exploration engineering, combined with the variation law of ore body and the optimum exploration net, the location of prospecting target area is determined, and a reasonable exploration project is designed. The main results are as follows: (1) the boundary morphology, thickness and grade variation of the V1 ore body of the Baiyangshan-Qianxindong ore deposit are quite different, and the change is relatively small in the Baiyang-Chuanxindong ore section, and the change is relatively small in the Wangmenshan-A tailings section. The variation of orebody is underestimated in exploration, and its inhomogeneity is not taken into account. After this study, the Baiyang-Chuanxindong ore formation belongs to the second type of exploration, while the Awei-Waimenshan ore body belongs to the first type of exploration, the Qian2Pao V1 orebody, although the whole ore body appears to be layered, but in the Baiyang-Jingxindong ore section, Because of the comprehensive action of faults and folds, the boundary morphology of ore body is more complex than that of other parts. The variation of ore body thickness is relatively stable, but the thickness is larger in the collapse space formed by fold. Through the analysis of the coefficient of grade change of the main ore-forming elements, the elements of AgPb ~ (2 +) Zn have a similar distribution law, and all of them have uneven spatial variation. The geological database of 6265 samples from 432 drilling projects in the mine was established from the characteristics of gradually decreasing from NW to SE, and statistical analysis was carried out after sample processing. Based on the theory of geostatistics and taking the variation function as the main tool, the variation function model of the element grade of AgPbPb-Zn in different ore sections was established. Among them, the continuity of the three main ore-forming elements is the best, the tendency is the second, and the thickness direction is the worst. According to the variation of variation function, the optimum exploration mesh of different ore sections is determined, which is more accurate than that of the traditional method. It is suggested that the exploration mesh of the Baiyang-Chuanxindong ore section is 50 脳 30m, and the variation of Yimenshan-Atailong ore segment is small. Based on the three-dimensional model of orebody combined with the law of thickness and grade change, it can be inferred that there may be a orebody with higher thickness and better grade in the southwestern side of the Xuxindong ore section and the Yuimenshan ore section. However, according to the three dimensional drawings of the prospecting project, there are few projects in this area at present, which can not expose the concealed orebodies well, and it is necessary to further increase the engineering in the middle section and the surface of the earth to reach the required survey mesh.
【學位授予單位】：昆明理工大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：P618.2

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