A 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, neutralized water/sewage treatment, etc., and can solve the problems of inability to neutralize acid mine wastewater, effective control, poor uniformity of pollution isolation performance, etc. , to achieve excellent governance effect and strong adaptability

Active Publication Date: 2021-04-06
湖南省和清环境科技有限公司
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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 of pollution isolation performance is poor. Considering the control of the migration of heavy metals in pollutants, it cannot neutralize the acid mine wastewater, and the blocking ability of heavy metals needs to be improved

Method used

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

Examples

Experimental program
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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 acidic mine wastewater. The method comprises the following steps: selecting a site for construction of an engineering barrier, excavating an engineering barrier ditch; making a reinforcement cage, and placing the reinforcement cage on the reinforcement in the direction of seepage Geotextiles are laid on the inside of the cage; mixed blocks are made, and the mixed blocks are filled into the steel cage to form engineering barrier wall units; the engineering barrier wall units are combined and assembled, and hoisted into the engineering barrier ditch; data is collected around the engineering barrier , to monitor the heavy metal blocking effect. Compared with the prior art, the raw material of the mixed block of the present invention is prepared from clay, fly ash, and chemical additives, which has lower cost and good treatment effect; it adopts the combination and assembly of engineering barrier wall units, and adapts to site conditions and engineering needs. Strong; the construction steps are simple and easy, and the lifting and replacement are convenient; the engineering barrier wall units can be produced and sold on a large scale, with high economic benefits, and greatly shorten the construction period of the engineering barrier.

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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Patent Type & Authority Patents(China)
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 湖南省和清环境科技有限公司
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