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黄金科学技术 ›› 2018, Vol. 26 ›› Issue (4): 520-527.doi: 10.11872/j.issn.1005-2518.2018.04.520

• • 上一篇    下一篇

采场充填料浆流动与离析规律的试验研究

史采星1,2(),郭利杰1,2,*(),陈鑫政1,2   

  1. 1 北京矿冶科技集团有限公司,北京 100260
    2 国家金属矿绿色开采国际联合研究中心,北京 100260
  • 收稿日期:2018-04-22 修回日期:2018-06-16 出版日期:2018-10-10 发布日期:2018-10-17
  • 通讯作者: 郭利杰 E-mail:csuboy520_shi@163.com;guolijie@bgrimm.com
  • 作者简介:史采星(1987-),男,河北沧州人,工程师,从事矿山充填理论与技术研究工作。csuboy520_shi@163.com|郭利杰(1980-),男,河南南乐人,教授级高级工程师,从事矿山充填技术与矿冶固废资源化利用方面的研究工作。guolijie@bgrimm.com
  • 基金资助:
    国家自然科学基金面上项目“采场充填体的三维应力解析及其强度设计理论”(51774040);和国家自然科学基金青年基金项目“大体积松散体水泥—水玻璃浆液可控灌注机理实验研究”(41602365)

Experimental Study on the Law of Flow and Segregation of Filing Slurry in Stope

Caixing SHI1,2(),Lijie GUO1,2,*(),Xinzheng CHEN1,2   

  1. 1 Beijing General Research Institute of Mining and Metallurgy Technology Group,Beijing 100260,China
    2 National Center for International Joint Research on Green Metal Mining NCGMM,Beijing 100260,China
  • Received:2018-04-22 Revised:2018-06-16 Online:2018-10-10 Published:2018-10-17
  • Contact: Lijie GUO E-mail:csuboy520_shi@163.com;guolijie@bgrimm.com

摘要:

为研究采场充填料浆流动规律及充填料浆离析分层对充填体强度的影响规律,开展了充填料浆流动相似模拟试验及采场原位充填体力学强度测试试验,研究结果表明:单点下料时充填料浆流动终态坡面趋向于正态分布。流动过程中充填料浆产生离析分层现象,主要表现为充填体物料的粒径沿料浆流动方向呈先增大后减小的趋势,充填体强度沿料浆流动方向呈先减小后增大再减小的倒转“S”形趋势。采场原位充填体强度在下料口附近与标准试块强度接近,在采场中间位置附近的充填体强度最小,在距离下料点采场长度7/10左右的位置充填体强度达到最大值。研究成果能够为充填采场下料管的数量及位置设计提供依据,从而保证充填体的整体质量。

关键词: 充填料浆, 水槽, 流动规律, 离析, 粒径, 强度分布, 矿山充填, 原位充填体

Abstract:

In order to study the flow law of filling slurry and the influence of filling slurry segregation on the strength of filling body,the simulation test of filling slurry flow and the mechanical strength test of the filling body in situ were carried out,which showed that the terminal slope of the filling slurry flow tends to the normal distribution.Segregation stratification generated in the process of filling slurry flow is mainly manifested as the particle size of the filling material decreases with the flow direction of the slurry,the filling strength decreases with the flow direction of the slurry flow,and in the trends of decreasing-increasing-decreasing as "S" inverted.The strength of the filling body is close to that of the standard test block in the vicinity of the feed opening,while the filling strength is the minimum near the middle of the slope,length at location near 7/10 of slope,the maximum.The research results can provide the basis for the design of the quantity and location of the filling pipe in the filling slope,so as to ensure the whole quality of the filling body.

Key words: filing slurry, flume, flowing law, segregation, particle size, strength distribution characteristics, mine filling, in-situ filling body

中图分类号: 

  • TD853

表1

分级尾砂基本物理参数"

材料名称 密度/(g·cm-3 容重/(g·cm-3 孔隙率/ %
分级尾砂 3.058 1.445 52.76

图1

粒级分布曲线"

表2

混合料粒度参数"

材料 d10 d30 d50 d90
标准样品 3.70 22.90 53.79 220.36

图2

试验流程设计图 1-搅拌桶;2-下料漏斗;3-支架;4-工作台阶;5-球阀"

图3

充填料浆流动终态坡面图"

图4

取样位置示意图"

表3

不同位置粒度参数"

取样位置 d10 d30 d50 d90
1# 5.86 29.81 59.85 243.46
2# 11.09 50.81 94.26 316.27
3# 12.18 55.23 104.35 351.23
4# 11.14 52.25 106.10 395.80
5# 11.89 59.76 129.18 445.32
6# 7.47 39.36 77.60 275.61
7# 7.04 34.41 63.92 197.61
8# 6.97 36.69 67.20 208.70
9# 4.03 18.07 39.83 134.37

图5

不同位置粒度参数(0#代表标准样品)"

图6

钻孔取样布置示意图"

图7

不同钻孔充填体平均抗压强度值"

图8

2P采场取芯钻孔参数"

图9

采场不同位置充填体强度"

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