img

Wechat

Adv. Search

Gold Science and Technology ›› 2021, Vol. 29 ›› Issue (4): 564-572.doi: 10.11872/j.issn.1005-2518.2021.04.188

• Mining Technology and Mine Management • Previous Articles    

Experimental Research on Application of Mixed Aggregate of Mining Waste Rock and Tailings in Downward Layered Approach and Cemented Filling Mining Method HE Jianyuan1,LI Hongye1,GAO Qian2,YIN Shenghua2

  

  • Received:2020-10-23 Revised:2021-05-22 Online:2021-08-31 Published:2021-10-08

Abstract:

The downward layered approach cemented filling mining method was selected in Jinchuan nickel deposit,but there is a problem of high filling cost and low production capacity.In order to reduce the cost of filling mining,the industrial filling test of waste rock and tailing mixed aggregate was carried out based on a large number of laboratory studies.Firstly,the particle size analysis and grading study of the -16 mm waste rock coarse aggregate and dressing tailings fine aggregate were carried out.The results show that the diameters of the two kinds of aggregate belong to filling aggregate with discontinuous distribution and poor gradation.According to the different ratios of the two kinds of aggregate,the compactness test of the mixed aggregate was carried out,and the relationship curve between the ratio of waste rock tailings of the mixed aggregate and the compactness was established,so as to determine the optimal ratio of the mixed aggregate when the compactness reached the maximum.The research results show that when the ratio of -16 mm waste rock and dressing tailings is within the range of 7∶3 to 5∶5,the density of mixed aggregate accumulation reaches or approaches the maximum,and the corresponding ratio of mixed aggregate particle size is continuously graded.Then,the industrial filling test was carried out for the mixed aggregate with the ratio of waste rock and tailing of 6∶4 and 5∶5,thus obtaining the strength of the cemented backfill with the mixed aggregate of the two ratios.The test results show that when the cement content is 260 kg/m3,the strength of cemented backfill of the two kinds of mixed aggregate meets the strength requirements of cemented backfill in the downward layered approach and cemented filling mining method in Jinchuan mine,and the strength of the mixed aggregate cementing backfill in the ratio of 6∶4 is higher than that of the mixed aggregate cementing backfill in the ratio of 5∶5.According to the observation on the fracture surface of the cementing backfill test block,when a single stage of mixing is used,there are uneven mixing of the mixed aggregate filler slurry and agglomeration of cement and tailings,resulting in poor homogeneity of the cemented filler and low overall stability.So for the waste rock-tailing mixed aggregate filling slurry,it is recommended to use two-stage activated stirring,which can not only improve the overall quality of the filling body,but also improve the fluidity of the filling slurry,which is conducive to the pipeline self-flow transportation of the filling slurry.It is also found in the industrial filling test that the precise ratio of slurry of mixed aggrgate is another important factor affecting the quality of cemented backfill and slurry pipe transport characteristics.Therefore,improving the ratio of waste tailing aggregate and adding amount of cement and water is an important factor to realize the safe and reliable application of waste tailing mixed aggregate in filling mining.

Key words: waste rock and tailing, mixed aggregate, particle size and grading, downward slicing and filling mining method, industrial test, backfill mass

CLC Number: 

  • TD863

Table 1

Chemical composition of waste rock and tailings in Jinchuan mine(%)"

化学成分含量化学成分含量
废石尾砂废石尾砂
SiO236.3133.60Cr2O3-0.60
MgO28.1533.00Na2O-0.30
Fe2O3-20.70K2O-0.30
SO3-4.50TiO2-0.20
Al2O33.392.70其他10.381.40
CaO3.862.60

Table 2

Analysis results of particle size of waste rock and tailings in Jinchuan mine"

骨料粒径/mm频度分布/%负累积分布/%
选厂尾砂0.00053.513.52
0.00154.928.43
0.00306.2214.62
0.006010.8125.42
0.012015.4140.81
0.02407.9248.73
0.048012.1260.82
0.096024.0184.82
0.164015.22100.00
废石骨料0.08005.525.52
0.23702.518.01
0.47207.0215.01
0.94205.6820.68
1.80407.0227.65
3.556014.3442.01
7.126041.3283.32
12.740016.68100.00

Table 3

Distribution parameters of particle size gradation of waste rock aggregate and tailings in Jinchuan mine"

骨料尾砂特征粒径/mm不均匀系数Cu曲率系数Cc粒度特性曲线
选厂尾砂d900.156622.670.368y=100x0.20.43126
d600.0612
d500.0400
d300.0078
d100.0027
dav0.0630
废石骨料d9013.50117.963.808y=100x0.20.43126
d607.023
d505.235
d303.233
d100.391
dav5.803

Fig.1

Distribution curves of particle size gradation of waste rock aggregate in Jinchuan mine"

Fig.2

Relationship curves between the stacking density of the waste rock-tailings mixed aggregate and waste rock content"

Table 4

Design of mixture ratio of waste rock and full tailings filling slurry"

试验参数试验水平
废石∶尾砂5∶5、6∶4、7∶3
水泥掺量/(kg·m-3220、240、260、280
料浆质量浓度/%77、78、79、80

Fig.3

Strength of backfill with different aggregate ratio"

Table 5

Test results of strength of roadway cemented filling body based on industrial test in Jinchuan mine"

采场位置测点距进路口距离/m测点高度/m充填体强度/MPa采场位置测点距进路口距离/m测点高度/m充填体强度/MPa
152.54.32202.56.43
152.05.00202.05.40
151.54.65201.56.78
151.05.31201.06.58
150.56.13200.58.39
1102.54.89252.54.94
1102.04.51252.05.37
1101.54.73251.56.08
1101.05.14251.06.34
1100.55.50250.57.44
1202.54.512252.05.36
1202.04.202251.55.16
1201.55.162251.05.83
1201.04.462250.58.57
1200.55.332351.55.24
1302.04.302351.06.16
1301.54.882350.56.93
1301.04.622451.06.82
1300.54.952450.57.30
1402.04.332501.05.63
1401.54.552500.57.55
1401.06.46301.04.99
1400.55.50300.56.44
1501.54.93351.05.99
1501.04.66350.57.00
1500.56.14

Table 6

Industrial test time and field test results of waste rock-tailing mixed aggregate filling in Jinchuan mine"

测定时间充填时间胶结时间进路编号废石和尾砂配比平均抗压强度/MPa
8月13日7月21日23 d5工区1 158 m分段Ⅲ盘区一分层19#5∶54.97
8月14日7月26日19 d6工区1 178 m分段Ⅴ盘区三分层42#5∶55.12
8月21日7月25日27 d6工区1 178 m分段Ⅵ盘区三分层28#6∶46.39

Table 7

Test results of compressive strength for filling body with ratio of waste and tailings is 5∶5"

水泥掺量 /(kg·m-3料浆质量浓度/%抗压强度/MPa
3 d7 d28 d
260772.2
260782.8
260793.1
260781.61.703.8
260792.43.314.2
260802.44.054.7

Table 8

Test results of compressive strength for filling body with ratio of waste and tailings is 6∶4"

水泥掺量 /(kg·m-3料浆质量浓度/%抗压强度/MPa
3 d7 d28 d
260772.6
260782.7
260793.1
260782.13.34.35
260792.54.24.85
260803.54.358.50

Fig.4

Fracture damage photos of mixed aggregate cemented filling body with ratio of waste rock and tailings is 5∶5"

Ba Lei,Wei Hanbo,Wen Zhenjiang,al et,2020.Optimization proportioning test on mixed aggregate of waste rock and copper slag tailings[J].Mining Research and Development,10(2):31-37.
Dang Mingzhi,Wen Zhenjiang,Gao Qian,al et,2019.Experiment on proportion and strength of mixed aggregates with copper slag tailings[J].Mining Research and Development,39(1):32-35.
Ding Xinbang,Tan Shilin,Jiang Xueqin,al et,2011.The application of solver in aggregate grading of stone-chip concrete[J].Guangdong Highway Communications,(3):49-51.
Guo Huigao,Gu Dazhi,Zou Long,al et,2011.Application prospect of waste rock cemented filling technology in Jinchuan No.2 mining area[J].Mining Technology,11(4):39-41.
He Jianyuan,Yang Zhiqiang,Gao Qian,al et,2016.Analysis on particle size grading of mixed aggregate with waste rock and whole tailings and its proportion decision[J].Mining Research and Development,36(11):22-27.
Daliang Heichuan,Tianxiu Jiubao,Pingwei Zhou,al et,2011.Design of cement for high strength concrete based on particle filling property[J].Li Yuemei,transl.China Concrete,(27):34-39.
Li Yunwu,Chen Wenwu,2004.Test study on paste fill material of total tailings and broken rock[J].China Mine Engineering,33(2):4-6.
Liu Tongyou,Han Bin,Wang Xiaowei,2000.Utilization of nickel flash-smelting furnace slag as material for cement stowing[J].China Mining Magazine,9(6):20-22.
Lu Huazheng,2006.Study on Design Method of Graded Crushed Stone[D].Xi’an:Chang’an University.
Qu Liang,Chen Dexin,Yang Xiaobing,al et,2018.Test on filling characteristics of mixed aggregate of waste rock and copper slag tailings in Jinchuan mine[J].Industrial Minerals & Processing,47(3):51-54.
Wang Hongjiang,Wu Aixiang,Xiao Weiguo,al et,2009.The progresses of coarse paste fill technology and its existing problem[J].Metal Mine,39(11):1-5.
Wen Zhenjiang,Gao Qian,Chen Dexin,al et,2019.Effect of mixed aggregate gradation on segregation of filling slurry[J].Journal of Central South University(Science and Technology),50(9):2264-2272.
Wen Zhenjiang,Gao Qian,Wang Yongding,al et,2020.Experiment on correlation between rheological properties of filling slurry with different mass concentration and mixed aggregate gradation[J].Journal of Northeastern University(Natural Science),41(5):642-848.
Yang Xiaobing,Gao Qian,Wang Yongding,al et,2020.Effects of early strength accelerators on the strength of filling body comprised of consolidated powder and mixed aggregate[J].Metal Mine,49(9):48-53.
Yang Zhiqiang,Chen Dexin,Gao Qian,al et,2014a.Application test of fly ash in underhand drift cut-and roadway layered cemented filling mining[J].Journal of Liaoning Technical University(Natural Science Edition),33(2):152-156.
Yang Zhiqiang,Gao Qian,Dong Lu,al et,2013.Key technology of new filling cementitious material based on desulfurized ash[J].Mining Technology,13(3):20-27.
Yang Zhiqiang,Xiao Bolin,Gao Qian,al et,2014b.Experimental study on development of a new cementitious material based on rod grinding in Jinchuan nickel mine[J].Nonferrous Metals(Mine Section),66(5):65-68.
Yu Enyi,Huang Xudong,Gong Jiagui,2020.Experimental research on uniaxial compressive strength of cemented backfill with waste rock and full tailings based on RSM-BBD[J].Mining Research and Development,10(7):75-80.
Yuan Guobin,Yang Zhiqiang,Gao Qian,al et,2016.Strength test on cemented filling body for combined aggregate of waste rock and rod-mill sand[J].Mining Research and Development,36(8):16-20.
Zhang Lei,Qiao Dengpan,Cheng Weihua,al et,2012.Analysis on gradation and intensity of coarse aggregate of JNMC[J].Mining and Metallurgy,21(2):12-15.
Zhu Mengliang,Tang Xiaolin,Liu Wei,2010.Effect of coarse aggregate on skeleton structure formation of cement stabilized crushed stone[J].Journal of Transport Science and Engineering,26(1):1-5.
Zhuo Qingfeng,Ba Lei,Wang Qifeng,2021.Optimum experiment of aggregate proportion for mixed filling with fly ash[J].Multipurpose Utilization of Mineral Resources,(3):187-192,199.
巴蕾,韦寒波,温震江,等,2020.废石—铜渣尾砂混合骨料配比优化试验[J].矿业研究与开发,10(2):31-37.
党明智,温震江,高谦,等,2019.掺铜渣尾砂的混合骨料配比及其强度试验[J].矿业研究与开发,39(1):32-35.
丁新榜,谭世霖,蒋雪琴,等,2011.规划求解在石屑混凝土集料级配中的应用研究[J].广东公路交通,(3):49-51.
郭慧高,辜大志,邹龙,等,2011.浅析废石胶结充填技术在金川二矿区的应用前景[J].采矿技术,11(4):39-41.
何建元,杨志强,高谦,等,2016.废石全尾砂混合骨料粒径级配分析与配比决策[J].矿业研究与开发,36(11):22-27.
黑川大亮,久保田修,平尾宙,等,2011.根据颗粒填充性设计高强混凝土用水泥[J].李月梅,译.混凝土世界,(27):34-39.
李云武,陈闻舞,2004.全尾砂碎石膏体充填材料试验研究[J].中国矿山工程,33(2):4-6.
刘同有,韩斌,王小卫,2000.镍闪速炉水淬渣胶结充填配合比优化选择与分析[J].中国矿业,9(6):20-22.
鲁华征,2006.级配碎石设计方法研究[D].西安:长安大学.
瞿亮,陈得信,杨晓炳,等,2018.金川矿山废石—铜渣尾砂混合骨料充填特性试验研究[J].化工矿物与加工,47(3):51-54.
王洪江,吴爱祥,肖卫国,等,2009.粗粒级膏体充填的技术进展及存在的问题[J].金属矿山,39(11):1-5.
温震江,高谦,陈得信,等,2019.混合骨料级配对充填料浆离析的影响[J].中南大学学报(自然科学版),50(9):2264-2272.
温震江,高谦,王永定,等,2020.不同浓度料浆流变特性与混合骨料级配相关性试验[J].东北大学学报(自然科学版),41(5):642-848.
杨晓炳,高谦,王永定,等,2020.早强剂对固结粉胶凝材料混合骨料充填体强度的影响[J].金属矿山,49(9):48-53.
杨志强,陈得信,高谦,等,2014a.粉煤灰在下向分层胶结充填采矿中的应用试验[J].辽宁工程技术大学学报(自然科学版),33(2):152-156.
杨志强,高谦,董璐,等,2013.基于脱硫灰渣的新型充填胶凝材料关键技术[J].采矿技术,13(3):20-27.
杨志强,肖柏林,高谦,等,2014b.基于金川棒磨砂充填料开发新型充填胶凝材料的试验研究[J].有色金属(矿山部分),66(5):65-68.
于恩毅,黄旭董,龚甲桂,2020.基于RSM-BBD的废石—全尾砂胶结充填体强度试验研究[J].矿业研究与开发,10(7):75-80.
袁国斌,杨志强,高谦,等,2016.废石—棒磨砂混合骨料胶结充填体强度试验[J].矿业研究与开发,36(8):16-20.
张磊,乔登攀,程纬华,等,2012.金川粗骨料级配与强度分析[J].矿冶,21(2):12-15.
朱梦良,唐小林,刘伟,2010.粗集料对水泥稳定碎石骨架结构形成的影响[J].交通科学与工程,26(1):1-5.
卓庆奉,巴蕾,王奇峰,2021.掺粉煤灰的混合充填骨料配比优化实验[J].矿产综合利用,(3):187-192,199.
[1] Yongyuan KOU, Guang LI, Long ZOU, Fengshan MA, Jie GUO. Study on Mining Method of Horizontal Pillar in the Middle Section of +1 000 m in Jinchuan No.2 Mining Area [J]. Gold Science and Technology, 2020, 28(3): 353-362.
[2] LI Cong,CHEN Jianhong. Risk Evaluation Research of Uranium Resources Overseas Investment Projects Based on VIKOR Algorithm [J]. Gold Science and Technology, 2014, 22(6): 60-64.
[3] YANG Jiguang,WANG Haitao,LIU Wenzhong. The Application of Multi Mining Area Filling Systems Integration and Improving the Efficiency of Production Mode in Jiaojia Gold Mine [J]. Gold Science and Technology, 2013, 21(2): 69-72.
[4] LI Xiangwen,ZHANG Hengzhi,SHI Yongwen,YAN Yongsheng. Study on the Problems of Environmental Engineering Geology in Shabaosi Gold Deposit,Heilongjiang Province [J]. J4, 2011, 19(6): 75-78.
[5] LIU Chuan. Technical Measures of Raising the Grade of Withdrawal of Ore in Yunxi Mining Area [J]. J4, 2004, 12(3): 28-31.
[6] XIONG Gang. THE USEFUL OF TETHNOLOGY OF ELECTRIC CONTROL IN MIES RAISED SYSTEM XIONG GANG [J]. J4, 2003, 11(4): 35-37.
[7] LI Yong,SONG Weidong,YUE Faqiang,ZHANG Rui,ZHANG Pingshun. APPLICATION OF FUZZY AND COMPREHENSIVE EVALUATION IN THE OPTIMIZATION OF MINE OUTPUT [J]. J4, 2003, 11(3): 35-38.
[8] ZHANG Bingxu,HAN Hongjiang. EXPERIMENTAL RESEARCH AND ENGINEERING PRACTICE OF MINING METHOD ABOUT DAZHUANGZI GOLD MINE [J]. J4, 2003, 11(1): 28-32.
[9] WANG Chaoyang. THE DISCREPANCY ESTIMATION AND IMPLEMENTATION OF THE LARGE2SCALE MEETING HEAD-ON PROJECT IN LINGLONG GOLD MINE [J]. J4, 2002, 10(4): 17-21.
[10] CAI Baoqing,FAN Manhua. COMPRENHENSIVE ASSESSMENTS OF STOPE SUPPORT TECHNIQUES IN GOLD MINE [J]. J4, 2001, 9(6): 30-35.
[11] . [J]. J4, 2001, 9(6): 11-14.
[12] LI Qiutao,WEI Minghao,LIU Tanzhou,JIANG Yanan,WANG Zhiyuan. Research on Mining Pressure Control Method in Jinqingding Mine [J]. J4, 2011, 19(1): 80-82.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!