Tailing pond underground diaphragm wall grooving and quincunx curtain grouting synergistic process

By employing a combined process of trenching for anti-seepage walls and plum blossom-shaped curtain grouting in tailings ponds, the problem of incomplete sealing of tailings pond leakage was solved, achieving effective blocking of pollution plumes and long-term stable control of hydrological conditions, thus improving the adaptability and safety of the anti-seepage system.

CN120968015AActive Publication Date: 2025-11-18CHINALCO ENVIRONMENTAL PROTECTION & ENERGY CONSERVATION GRP CO LTD
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Patent Information

Application Number
CN202511500122.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-21
Publication Date
2025-11-18
Estimated Expiration
2045-10-21

AI Technical Summary

Technical Problem

Existing tailings dam seepage prevention and control measures are inadequate in situations with shallow overburden on weathered bedrock, complex seepage paths, and frequent water level fluctuations. They are difficult to implement, have poor hydraulic control effects, and are not thorough in sealing seepage. In particular, in old tailings dams, the original seepage prevention system may not have been installed or may have aged and failed. Pollution plumes can easily break through the curtain or bypass the boundary of the flow wall, causing secondary pollution.

Method used

The process employs a combined technique of trenching underground anti-seepage walls and plum blossom-shaped curtain grouting. By implementing curtain grouting in the lower area of ​​the anti-seepage wall, a continuous curtain anti-seepage layer is formed using a multi-row sequential hole arrangement. An overlap area is set between the anti-seepage wall and the curtain grouting body. Combined with an online water level monitoring and groundwater level control system, an intelligent and dynamically adjustable prevention and control system is formed.

Benefits of technology

It improves seepage prevention and sealing performance, adapts to complex geological structures and hydraulic conditions, reduces leakage risk, effectively blocks pollution plumes and achieves long-term stable control of hydrological conditions, thereby enhancing the environmental safety benefits of tailings ponds.

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Abstract

The invention discloses a tailing pond underground anti-seepage wall grooving and quincunx curtain grouting synergistic process, and relates to the technical field of grouting collaboration.The tailing pond underground anti-seepage wall grooving and quincunx curtain grouting synergistic process comprises the following steps that S1, anti-seepage wall bodies are constructed in a foundation of a to-be-treated area, the anti-seepage wall bodies are continuously arranged along the treatment axis, a wall body groove section is formed through the underground grooving technology, and the wall body groove section is formed; s2, curtain grouting treatment is synchronously or firstly carried out on the lower area or the upstream side of the anti-seepage wall body, a multi-row sequential hole arrangement mode is adopted for curtain grouting, grouting holes are arranged in a staggered or quincuncial mode, a continuous curtain anti-seepage layer is formed, and the anti-seepage wall body is formed; and S3, the anti-seepage wall and the curtain grouting bodies are provided with lap joint areas in the vertical direction or the horizontal direction, and a wall-curtain integrated anti-seepage structure is formed. The plastic concrete anti-seepage wall is constructed in the foundation, the multiple rows of quincunx curtain grouting bodies are arranged in the foundation, and the lap joint structures are arranged between the plastic concrete anti-seepage wall and the multiple rows of quincunx curtain grouting bodies; unification of structural stability and anti-seepage continuity of the underground anti-seepage system is achieved.
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