Wet shotcrete support method for underground tailings
A technology of wet spraying and tailings, which is applied in shaft lining, underground chambers, shaft equipment, etc., can solve the problems of no utilization, potential safety hazards for residents downstream of tailings ponds, and occupation of tailings pond storage capacity, so as to achieve sufficient sources, Impact force distribution Easy to adhere and reduce the amount of dust
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0035] Example 1, divided into 5 groups, 40 kg, 60 kg, 80 kg, 100 kg, and 120 kg of tailings were added to groups 1-5, and each group also added 20 kg of cement, 80 g of quick-setting agent, 20 g of Mortar King and 20 kg of water was used to make 5 kinds of slurry, that is, the mass ratio of tailings sand to cement, that is, the ratio of lime to sand was 1:2, 1:3, 1:4, 1:5 and 1:6 respectively. The process is wet sprayed, and after 28 days of curing, the strength test is carried out with a concrete rebound tester. The test results are shown in figure 2 . like figure 2 As shown, the highest strength of the shotcrete body after curing for 28 days is 32 MPa, and the lime-sand ratio at this time is 1:3 and 1:4, because the cost of the slurry with the lime-sand ratio of 1:3 is higher than that of 1:4, while Both have the same effect, therefore, the best lime-sand ratio is 1:4.
Embodiment 2
[0036] Example 2, divided into 5 groups, 12 kg, 16 kg, 20 kg, 24 kg, 28 kg of water were added to groups 1-5, and each group also added 80 kg of tailings, 20 kg of cement, 80 g of quick-setting agent and mortar Wang 20 g, made into 5 kinds of slurry, the mass ratio of water and cement, that is, the water-cement ratio is 0.6:1, 0.8:1, 1:1, 1.2:1 and 1.4:1, and the same spraying process is carried out Wet shotcrete, after 28 days of curing, use the concrete rebound tester to test the strength, the test results are shown in image 3 . Depend on image 3 It can be seen that the optimum water-cement ratio of the present invention is 1:1, and the strength of the shotcrete body after 28 days of curing with this water-cement ratio is 32 MPa.
Embodiment 3
[0037]Example 3, divided into 4 groups, 100 g of accelerator, No. 108 glue and 100 g of liquid strengthening agent were added to group 1-3, no additives were added to group 4, and 80 kg of tailings, 20 kg of cement and water were also added to each group 20 kg, made into 5 kinds of slurries, carried out wet spraying with the same spraying process, and observed regularly during the maintenance period. The test found that a small amount of cracks appeared in the first group at the later stage; when the second group and the third group were sprayed, pipe blockage frequently occurred, and the slurry was very dry and easy to agglomerate. After adding a certain amount of water, the pipe blockage disappeared, but Bleeding is very serious after spraying, and even falls in groups; after the fourth group is sprayed out, it is easy to fall in groups. The results show that No. 108 rubber and liquid reinforcing agent are not suitable as additives under this condition, and only adding accel...
PUM
| Property | Measurement | Unit |
|---|---|---|
| density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More