Non-closed borehole sealing process and structure

An unsealed and crafted technology, applied in sealing/isolation, earthwork drilling, wellbore/well components, etc., can solve problems such as hidden water inrush in mine pits, unknown drilling actual trajectory, and inability to determine the actual location of drilling, etc. To achieve the effect of avoiding local lack of pulp

Inactive Publication Date: 2018-10-26
首钢滦南马城矿业有限责任公司
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  • Claims
  • Application Information

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Problems solved by technology

However, due to various reasons, some boreholes have not been sealed after the final hole, and are in an unsealed state. During mine infrastructure and mining, once these boreholes are exposed, they will form direct hydraulic pressure between the Quaternary water and the stope. channel, forming a major hidden danger of water inrush in the mine pit, which needs to be blocked and treated in advance
[0004] However, due

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  • Non-closed borehole sealing process and structure
  • Non-closed borehole sealing process and structure
  • Non-closed borehole sealing process and structure

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Embodiment Construction

[0040] In order to enable those skilled in the technical field to which the application belongs to understand the application more clearly, the technical solutions of the application will be described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0041] In the embodiment of the present invention, the unsealed borehole plugging process is applied to a mining area in a certain area. The mining area in this area is located at the top of a channel alluvial fan, covered with thick Quaternary strata, with a total thickness of 50m to 180m . The Quaternary formation is highly permeable and water-rich, consisting of thick gravel, pebbles, sand and discontinuous cohesive soil layers, and is closely related to the hydraulics of the channel, forming a thick Quaternary strong water body.

[0042] During the geological survey of iron mines in the 1970s in this mining area, there were 18 old boreholes that were not sealed after the final hole. ...

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Abstract

The invention discloses a non-closed borehole sealing process and structure. All designed grouting hole tracks are mutually overlapped and surrounded in space, a sand-clock-type grouting-hole-series model which is of a structure with two thick ends and a thin middle can be formed, the part, with the thin middle, of the grouting-hole-series model corresponds to a sealing position top plate, the stratum of the sealing position top plate is an intensely weathered zone, the extension range of fractures is small, and therefore, the horizontal diffusion range of slurry is small; the part, with the thick lower end, of the grouting-hole-series model corresponds to a sealing position bottom plate, and is generally a weak weathering zone, unweathered protolith or a transitional zone between the weakweathering zone and unweathered protolith, the extension range of the fractures is large, and the horizontal diffusion range of the slurry is large. By means of the non-closed borehole sealing process and structure, slurry diffusion features in different stratas are fully utilized, the slurry diffusion superposition rate within a certain sealing range is increased, a cone-shaped waterproof curtain can be obtained based on the structures, and boreholes are effectively sealed.

Description

technical field [0001] The application belongs to the technical field of borehole plugging, and in particular relates to an unsealed borehole plugging process and structure. Background technique [0002] The Quaternary is the second period of the Cenozoic Era. The stratum formed in the Quaternary is called the Quaternary, and the Quaternary sediments are widely distributed. Except for the steep hillsides with exposed rocks, almost all parts of the world are covered by Quaternary sediments. The Quaternary sediments were formed relatively late, most of them were not cemented, and they were relatively well preserved. Quaternary deposits mainly include glacial deposits, fluvial deposits, lacustrine deposits, eolian deposits, cave deposits and marine deposits. Followed by ice-water deposits, residual deposits, slope deposits, flood deposits, biological deposits and volcanic deposits. Quaternary formations are highly permeable and water-rich, consisting of thick gravel pebbles,...

Claims

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Application Information

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IPC IPC(8): E21B33/13
CPCE21B33/13
Inventor 齐宝军杨景华王敬海康振兴魏宇
Owner 首钢滦南马城矿业有限责任公司
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