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Gold Science and Technology ›› 2018, Vol. 26 ›› Issue (4): 520-527.doi: 10.11872/j.issn.1005-2518.2018.04.520

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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

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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

CLC Number: 

  • TD853

Table.1

Basic physical parameters of classifying tailings"

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

Fig.1

The particle size distribution curve"

Table.2

Particle size parameter of mixture（μm）"

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

Fig.2

Design chart of test flow"

Fig.3

Filling slurry flow diagram of the final state of slope"

Fig.4

Schematic of sampling points"

Table.3

Particle size parameters at different"

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

Fig.5

Particle size parameters at different positions（0# stands for standard samples）"

Fig.6

Schematic diagram of borehole sampling points"

Fig.7

Average compressive strength value of filling body in different drilling"

Fig.8

Core drilling parameters of 2P stope"

Fig.9

Strength of filling body in different filling positions"

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