Method for determining mine single-row curtain-grouting hole distance
A curtain grouting and determination method technology, applied in construction, sheet pile wall, foundation structure engineering and other directions, can solve the problems of capital investment, increase project investment, lack of determination method, etc., achieve good economic benefits, shorten construction period, save money The effect of investment cost
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Embodiment 1
[0029] Example 1: West Curtain Line of Zhongguan Iron Mine
[0030] 1. Curtain thickness T: predicted water level elevation H outside the west curtain of Zhongguan Iron Mine 0 It is +100m, and the elevation of the bottom of the west curtain is H 1 -250m, maximum water head H=H 0 -H 1 =100-(-250)=350m, the grouting material is 425 Portland cement, the penetration ratio J 0 =60, T=H / J0=350 / 60=5.8m.
[0031] 2. Construction inspection holes to obtain curtain permeability: drill 2 construction inspection holes, test parameters and permeability q 0 The values are as follows:
[0032] Hole number
R(m)
test section
Seepage
Q(L)
L(m)
pressure
P(mpa)
time
t(min)
Permeability
q 0 (Lu)
J1
9
D1
1433.45
112
3.30
20
0.194
D2
2298.16
149
3.27
25
0.189
D3
1184.32
90
3.81
...
Embodiment 2
[0039] Example 2: Zhongguan Iron Mine North Curtain Line
[0040] 1. Curtain Thickness T: Predicted water level elevation outside the curtain outside the north curtain of Zhongguan Iron Mine H 0 It is +100m, and the elevation of the bottom of the north curtain is H 1 -180m, maximum water head H=H 0 -H 1 =100-(-180)=280(m).
[0041] The grouting material is 425 Portland cement, and the penetration ratio J 0 =60, T=H / J0=280 / 60=4.67m.
[0042] 2. Obtain the curtain permeability from the construction inspection hole. 2 construction inspection holes, test parameters and permeability q 0 The values are as follows:
[0043]
[0044] 3. Both J1 and J2 meet the curtain quality requirements, both q 0≤0.2Lu, in order to save investment, the effective diffusion radius of the slurry is determined to be R=9m.
[0045] 4. The same horizontal grouting point distance D 0 :
[0046] D 0 = 2 R 2...
Embodiment 3
[0050] Example 3: Northeast Curtain Line of Zhongguan Iron Mine
[0051] 1. Curtain thickness T: forecast water level elevation H outside the curtain outside the northeast of Zhongguan Iron Mine 0 It is +100m, and the elevation of the curtain bottom in the northeast is H 1 -220m, the maximum water head H=H 0 -H 1 =100-(-220)=320m, the grouting material is 425 Portland cement, the penetration ratio J 0 =60, T=H / J0=320 / 60=5.33.
[0052] 2. Construction inspection holes to obtain curtain permeability: 3 construction inspection holes, test parameters and permeability q 0 The values are as follows:
[0053] Hole number
radius
R(m)
test section
Seepage
Q(L)
L(m)
pressure
P(mpa)
time
t(min)
Permeability
q 0 (Lu)
J1
10
D1
3660.84
110
3.28
18
0.564
D2
2750.49
109
3.27
24
0.322
D3
1805.9...
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