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Advanced treatment method and system for collapse column based on laminated multi-branch horizontal well

A technology of collapsed column and horizontal well, applied in drilling equipment and methods, directional drilling, vertical well equipment, etc.

Active Publication Date: 2021-05-18
HUAINAN MINING IND GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method adopts downhole drilling, and there are various risks mentioned above.
This method is not applicable when the collapsing column is known

Method used

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  • Advanced treatment method and system for collapse column based on laminated multi-branch horizontal well
  • Advanced treatment method and system for collapse column based on laminated multi-branch horizontal well
  • Advanced treatment method and system for collapse column based on laminated multi-branch horizontal well

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Embodiment Construction

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are part of the present invention Examples, not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0048] This embodiment provides an advanced treatment method for the existing subsidence columns before coal seam mining. The treatment method is based on the formation of water stoppers in multi-branched horizontal wells. The specific method is as follows:

[0049] Step 1. Geological exploration. Before mining, use three-dimensional seismic exploration technology to determine wh...

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Abstract

The invention discloses an advanced treatment method and system for a collapse column based on a laminated multi-branch horizontal well. After the position of the karst collapse column is determined, a karst collapse column fracture area is selected in advance, a water stop plug with a sufficient range and a sufficient thickness is precisely built between a karst water filling water source and a to-be-stoped coal seam by adopting the laminated multi-branch horizontal well, the connection between high-pressure karst water and the stoped coal seam is blocked, and the water inrush threat is eliminated. The advanced treatment of the karst collapse column is a beneficial attempt for changing the passive reason of collapse column water disaster treatment into the active reason, and technical support is provided for building a coal mine water prevention and control intrinsic safety type mine.

Description

technical field [0001] The invention relates to the technical field of water prevention and control in coal mines, in particular to a method and system for advanced treatment of collapsed columns based on laminated multi-branched horizontal wells. Background technique [0002] Karst collapse pillars are unidentified geological anomalies widely developed in Carboniferous-Permian coalfields in North China; according to incomplete statistics, more than 10,000 karst collapse pillars have been discovered in North China coalfields, of which Shanxi accounts for about 85%, and Hebei and Henan at the eastern foot of Taihang Mountain account for 12%. %. Other provinces account for about 3% in total; the karst subsidence column is a concealed vertical structure, which has the concealment and suddenness of water inrush. Therefore, the karst collapse column is a major threat of water damage in coal mines, once water inrush will cause disastrous consequences in the mine. The treatment o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/00E21D11/10E21B7/04E21B33/138
CPCE21F17/00E21D11/10E21B7/046E21B33/138
Inventor 文东明程志忠石德洲李正来苏明金常汉青陈晓雷万玉柱魏涛
Owner HUAINAN MINING IND GRP
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