Construction method of vertical engineering barrier system for neutralizing acid mine wastewater

A technology of acid mine wastewater and construction method, which is applied in water conservancy projects, mining wastewater treatment, neutralization water/sewage treatment, etc. problem, to achieve the effect of strong adaptability and excellent governance effect

Active Publication Date: 2020-05-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Clay vertical engineering barriers can effectively solve the above problems, but the construction process is relatively complicated. The wall is generally built by integral pressing and formed at one time, and the uniformity

Method used

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  • Construction method of vertical engineering barrier system for neutralizing acid mine wastewater
  • Construction method of vertical engineering barrier system for neutralizing acid mine wastewater
  • Construction method of vertical engineering barrier system for neutralizing acid mine wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Refer to attached figure 1 , figure 2 and image 3 , the present embodiment provides a strip-shaped engineering barrier wall assembled from engineering barrier wall units, and the specific operation steps are as follows:

[0050] (1) According to the location of acid mine wastewater pollution source, surrounding engineering geology, hydrogeological conditions and blocking direction, it is determined to use a belt-shaped engineering barrier wall to block acid mine wastewater, select a construction site, excavate ditches, and excavate The depth reaches the underground water-resisting layer, which is 5m (selected according to the site conditions), and the excavation length reaches the boundary of the water-resisting strata on both sides, and the excavation width is 0.6m;

[0051] (2) Make the external reinforcement cage of the engineering barrier wall unit, and lay geotextiles on the inner side of the reinforcement cage in the seepage direction of the acid mine wastewat...

Embodiment 2

[0057] Refer to attached figure 1 , figure 2 and Figure 4 , the present embodiment provides a ring-shaped engineering barrier wall assembled from engineering barrier wall units, and the specific operation steps are as follows:

[0058] (1) According to the location of acid mine wastewater pollution source, surrounding engineering geology, hydrogeological conditions and blocking direction, it is determined to use a ring-shaped engineering barrier wall to block acid mine wastewater, select a construction site, excavate ditches, and excavate The depth reaches the underground aquifer, which is 6m (selected according to the site conditions). The excavated annular ditch should completely surround the pollution source, and the excavation width of the ditch is 0.6m;

[0059] (2) Make the external reinforcement cage of the engineering barrier wall unit, and deploy geotextiles on the inside of the reinforcement cage in the direction of seepage; Figure 4 The direction of the middle...

Embodiment 3

[0065] Refer to attached figure 1 , figure 2 and Figure 5 , the embodiment of the present invention provides an engineering barrier system in the form of a multiple retardation in-situ reaction zone assembled by a neutralization engineering barrier wall unit and a retardation engineering barrier wall unit. The specific operation steps are as follows:

[0066] (1) According to the location of the acid mine wastewater pollution source, the surrounding engineering geology, hydrogeological conditions and the blocking direction, it is determined to use the multiple blocking engineering barrier system formed by the triple engineering barrier to neutralize and block the acid mine wastewater, and select three The construction site of the road engineering barrier, excavate ditches, the excavation depth reaches the underground water-resisting layer, which is 6m (selected according to the site conditions), the excavation length reaches the boundaries of the water-resisting strata on b...

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Abstract

The invention provides a construction method of a vertical engineering barrier system for neutralizing acid mine wastewater. The method comprises the following steps of conducting site selection for construction of an engineering barrier, and digging an engineering barrier drench; making a reinforcement cage, and distributing geotechnical cloth at the inner side of the reinforcement cage in the seepage direction; making fixed block bodies, and filling the reinforcement cage with the mixed block bodies to form engineering barrier wall units; conducting combined splicing on the engineering barrier wall units, and hoisting the engineering barrier wall units into the engineering barrier trench; and collecting data at the periphery of the engineering barrier to monitor the blocking effect on heavy metal. Compared with the prior art, the mixed block bodies are prepared from clay, flying ash and a chemical additive, the cost is low, and the treatment effect is good; the engineering barrier wall units are adopted for combined splicing, and the construction method is highly adaptable to the site condition and engineering demands; the construction steps are simple and feasible, and hoistingand lifting replacement are convenient; and the engineering barrier wall units can be produced and sold on a large scale, the economic benefit is high, and the construction period on the engineering barrier is greatly shortened.

Description

technical field [0001] The invention relates to the technical field of environmental engineering geology and isolation control of heavy metal polluted sites, in particular to a construction method for a vertical engineering barrier system for neutralizing acidic mine wastewater. Background technique [0002] For a long time, mineral resources, as an important resource that is conducive to promoting economic development, have been exploited in large quantities. However, due to immature mining technology and inadequate concept of sustainable development, the long-term unreasonable development of mines has led to various mine problems, the most representative of which is acid mine wastewater. At present, the research on acid mine wastewater mainly includes several aspects such as its properties, harmless treatment and resource utilization. Acid mine wastewater has a wide range of sources, and its low pH value and high concentration of heavy metal ions pose a serious threat to ...

Claims

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Application Information

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IPC IPC(8): E02D29/02E02D29/16E02D31/06C04B28/00C02F1/66C02F103/10
CPCC02F1/66C02F2103/10C04B28/001E02D29/0266E02D29/16E02D31/06C04B24/121C04B14/104C04B18/088C04B24/281
Inventor 贺勇喻志鹏张可能薛生国李冰冰蒋文强胡广
Owner CENT SOUTH UNIV
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