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  • ISSN 1005-2518 
  • Founded in 1988
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Mining Technology and Mine Management

Analysis on Bleeding Performance of Filling Slurry with Bentonite

  • Wenfeng XU ,
  • Yunzhang RAO ,
  • Shanghui LI ,
  • Wei XU
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  • School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,Jiangxi,China

Received date: 2018-06-27

  Revised date: 2019-01-17

  Online published: 2019-07-09

Abstract

The filling mining method has the advantages of preventing and controlling the collapse of the empty area,slowing down or avoiding surface subsidence. However,when filling deep ore bodies,the requirements for filling quality are becoming higher and higher.Due to the difference between the filling processes,there are technical problems in the filling process of the mine,including the problem of the topping in the cement filling. The effect of the ceiling in the goaf or the empty area directly affects the supporting effect of the surrounding rock.Due to the poor filling and filling effect,there are still a few centimeters to several tens of centimeters of gaps between the upper cementing surface of the filling body and the top plate.Due to the existence of this gap,the surrounding rock may collapse and,in severe cases,may even cause the upper rock mass to collapse, forming a subsidence on the surface.In the test,the whole tailings were used as the filling material,according to the slurry concentration of 65%,70%,75%,80%,the bentonite content was 0,5%,10%,15%,and the ratio of lime to sand was 1∶4, 1∶6,1∶8,1∶10,design three factors and four levels,a total of 16 orthogonal experiments. From the experimental observation data,when the dosage is 0,the total bleeding rate of the slurry is 5.6%~24.3%; when the dosage is 5%,the total bleeding rate is 5.2%~23.8%; when the dosage is 10%,the total bleeding rate is 3.5%~15.3%; when the dosage reaches 15%,the total bleeding rate of the filling slurry is reduced to 1.1% to 9.0%.The results show that the influence of slurry concentration on total bleeding rate was the most influential,then bentonite was the second and cement-sand ratio was the least.The dynamic bleeding process of slurry have two stages with early rapid bleeding stage and late stable bleeding stage. And the duration of the two stages is different under different proportion conditions. From the dynamic bleeding process,the most important factor influencing is bentonite content,but the concentration of slurry and the cement-sand ratio are small than bentonite content at the dynamic bleeding rate.

Cite this article

Wenfeng XU , Yunzhang RAO , Shanghui LI , Wei XU . Analysis on Bleeding Performance of Filling Slurry with Bentonite[J]. Gold Science and Technology, 2019 , 27(3) : 433 -439 . DOI: 10.11872/j.issn.1005-2518.2019.03.433

References

1 王新民,古德生,张钦礼 . 深井矿山充填理论与管道输送技术[M]. 长沙:中南大学出版社,2010.
1 Wang Xinmin , Gu Desheng , Zhang Qinli .Theory of Backfilling Activity and Pipeline Transportation Technology of Backfill in Deep Mines[M].Changsha:Central South University Press,2010.
2 瞿群迪,姚强岭,李学华,等 . 充填开采控制地表沉陷的关键因素分析[J].采矿与安全工程学报,2010,27(4):458-462.
2 Qu Qundi , Yao Qiangling , Li Xuehua ,et al . Key factors affecting control surface subsidence in backfilling mining[J]. Journal of Mining and Safety Engineering,2010,27(4):458-462.
3 韩兴华,梁卫国,张建功 . 特殊膏体材料充填对开采沉陷控制的数值分析[J]. 地下空间与工程学报,2015,11(3):788-795.
3 Han Xinghua , Liang Weiguo , Zhang Jiangong .Numerical analysis of mining subsidence control by special paste material backfill[J].Chinese Journal of Underground Space and Engineering,2015,11(3):788-795.
4 胡磊,任高峰,钱兆明,等 . 膨胀充填体在控制地表沉降量中的作用[J]. 金属矿山,2014,32(11):127-131.
4 Hu Lei , Ren Gaofeng , Qian Zhaoming ,et al . Effect of expanding backfills on controlling ground settlement[J]. Metal Mine,2014,32(11):127-131.
5 齐兆军,裴佃飞,何顺斌,等 . 三山岛海底开采充填接顶技术及地表无变形浅析[J]. 黄金科学技术,2010,18(3):14-19.
5 Qi Zhaojun , Pei Dianfei , He Shunbin ,et al . Analysis on surface no-distortion and roof -contacted filling technology of submarine mining[J]. Gold Science and Technology,2010,18(3):14-19.
6 周旭,杨陆海,白朝选,等 . 胶结充填接顶的技术改进[J]. 中国矿山工程,2012,41(4):4-6.
6 Zhou Xu , Yang Luhai , Bai Chaoxuan ,et al . Technical improvement of tight-filling of cemented filling[J].China Mine Engineering,2012,41(4):4-6.
7 黄玉诚,宋红华,林天埜,等 . 膨胀充填防火密闭墙构筑技术及应用[J]. 中国矿业,2014,23(7):130-132.
7 Huang Yucheng , Song Honghua , Lin Tianye ,et al .The construction technology and application of expansion filling fire sealing wall[J].China Mining Magazine,2014,23(7):130-132.
8 蒋林华,王涛,丁国庆,等 . 膨润土水泥砂浆性能及机理研究[J]. 新型建筑材料,2012,39(4):48-53.
8 Jiang Linhua , Wang Tao , Ding Guoqing ,et al . Researches on performances and mechanism of bentonite-cement mortar[J]. New Building Materials,2012,39(4):48-53.
9 郭万忠,金永飞,李海涛 . 添加剂对高掺量粉煤灰浆液特性的影响[J]. 煤炭技术,2014,33(11):7-10.
9 Guo Wanzhong , Jin Yongfei , Li Haitao .Effects of additives on properties of high volume fly ash slurry[J].Coal Technology,2014,33(11):7-10.
10 蓝志鹏,王新民,王洪江,等 . 料浆凝结时间对高硫充填体强度影响试验研究[J]. 黄金科学技术,2016,24(5):13-18.
10 Lan Zhipeng , Wang Xinmin , Wang Hongjiang ,et al .Experiment research on slurry setting time’s effect on high-sulphur backfill’s compressive strength[J].Gold Science and Technology,2016,24(5):13-18.
11 Sang G , Zhu Y , Yang G ,et al . Preparation and characterization of high porosity cement-based foam material[J]. Construction and Building Materials,2015,91:133-137.
12 Ma C , Chen B . Experimental study on the preparation and properties of a novel foamed concrete based on magnesium phosphate cement[J].Construction and Building Materials,2017,137:160-168.
13 Jiang J , Lu Z , Niu Y ,et al .Study on the preparation and properties of high-porosity foamed concretes based on ordinary Portland cement[J].Materials and Design,2016,92:949-959.
14 彭啸鹏,杨小聪 . 尾砂充填料浆静态沉降过程的现象及其机理[J]. 中国矿业,2017,26(4):126-130.
14 Peng Xiaopeng , Yang Xiaocong . Phenomenon and mechanism of settlement process of tailing backfill slurry[J]. China Mining Magazine,2017,26(4):126-130.
15 孙文静,刘仕卿,孙德安,等 . 高掺砂率膨润土混合土膨胀特性及其膨胀量预测[J]. 岩土工程学报,2015,37(9):1620-1626.
15 Sun Wenjing , Liu Shiqing , Sun De’an ,et al . Swelling characteristics of bentonite-sand mixtures with a high sand mixing ratio and its prediction[J]. Chinese Journal of Geotechnical Engineering,2015,37(9):1620-1626.
16 邓代强,韩浩亮,汪令辉,等 . 充填料浆的泌水沉缩性能分析[J]. 矿业研究与开发,2012(2):15-17.
16 Deng Daiqiang , Han Haoliang , Wang Linghui ,et al . Analysis on bleeding and setting performance of filling slurry[J]. Mining Research and Development,2012(2):15-17.
17 朱赞成,孙德安,王小岗,等 . 基于膨润土微观结构确定土水特征曲线的残余含水率[J]. 岩土工程学报,2015,37(7):1211-1217.
17 Zhu Zancheng , Sun De’an , Wang Xiaogang ,et al . Determination of residual water content in SWCC based on microscopic structure of bentonite[J]. Chinese Journal of Geotechnical Engineering,2015,37(7):1211-1217.
18 Bradbury M H , Baeyens B . Porewater chemistry in compacted re-saturated MX-80 bentonite[J]. Journal of Contaminant Hydrology,2003,61(1/2/3/4):329.
19 张钦礼,谢盛青,郑晶晶,等 .充填料浆沉降规律研究及输送可行性分析[J]. 重庆大学学报,2011,34(1):105-109,133.
19 Zhang Qinli , Xie Shengqing , Zheng Jingjing ,et al .Sedimentation law research and transportation feasibility study of backfilling slurry[J]. Journal of Chongqing University,2011,34(1):105-109,133.
20 张雄天 . 膨胀充填材料的试验研究[D]. 沈阳:东北大学,2014.
20 Zhang Xiongtian .The Experimental Study of Expansion Backfilling Material[D].Shenyang:Northeastern University,2014.
21 张建功,梁卫国,韩俊杰,等 .具有膨胀特性膏体填充材料的物理力学特性研究[J].矿业研究与开发,2015,35(1):15-20.
21 Zhang Jiangong , Liang Weiguo , Han Junjie ,et al .Study on physical and mechanical characteristics of paste filling material with swelling properties[J].Mining Research and Development,2015,35(1):15-20.
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