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A water inrush control method for near-horizontal directional drilling in mines

A technology of horizontal orientation and water inrush, which is applied in drilling equipment and methods, directional drilling, earthwork drilling, etc., and can solve problems such as easy sticking of drill pipes, poor delivery of stop plugs, strain and water leakage of stop plugs, etc. Achieve high construction efficiency

Active Publication Date: 2020-11-06
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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Problems solved by technology

[0005] The present invention provides a water inrush treatment method for near-horizontal directional drilling in mines to solve the problems existing in the existing methods that the drill pipe with the external pressurized pipe is easy to get stuck, the slurry stopper is not delivered in place, or the slurry stopper is damaged due to strain and water leakage. Unable to realize the problem of drilling water plugging

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  • A water inrush control method for near-horizontal directional drilling in mines

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Embodiment Construction

[0025] The present invention will be described in detail below with reference to the drawings and embodiments.

[0026] A method for controlling water inrush from near-horizontal directional drilling in a mine, comprising the following steps:

[0027] Step 1: After finding that the water inrush in the borehole 6 cannot be closed, connect the guide head 9 to the front end of the grout stopper 2, and then fix the grout stopper 2 to the front end of the drill pipe 5 through the nipple 3;

[0028] The guide head 9 is in the shape of a truncated cone, and a through hole is provided on the guide head 9. The through hole is coaxial and communicated with the core tube of the grout stopper 2, and the outside of the guide head 9 is provided with hard alloy;

[0029] Step 2: Insert the pressurized pipe 4 into the drill pipe 5, and its front end is connected with the grout stopper 2, and at the same time penetrate the grouting pipe 8 into the drill pipe 5, and open the grouting hole 7 on ...

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Abstract

The invention belongs to the technical field of mine water prevention and control and particularly relates to a coal mine near-horizontal directional hole water bursting treatment method, so that theproblem that by means of an existing method, a drill stem externally provided with a forcing pipe is prone to being clamped in a hole, a grout stop plug is not pushed in place or leaks water due to strain, and consequentially, hole water plugging fails to be achieved are solved. According to the method, a conical drill bit is additionally arranged at the front end of a grout stop plug, a grout stop plug forcing pipe is built in a drill stem, a grouting hole is sidewise formed in the drill steam behind the grout stop plug and connected with a grouting pipe built in the drill stem stage by stage, the grout stop plug is pushed into a predetermined portion in the hole during water plugging, the forcing pipe is used for pumping water into a capsule after the grout stop plug is pushed in place so that the capsule can fully expand, water outside the capsule is guided into a core pipe and flows out of a drill stem inner pipe, then the grouting pipe is used for performing grouting, grout fillsan outer ring space of the drill steam behind the capsule, hole water out of control is all collected and restrained in the grout stop plug core pipe and the hole inner pipe after the grout is solidified, a drill stem valve is closed, and the hole water bursting treatment work is completed.

Description

technical field [0001] The invention belongs to the technical field of mine water prevention and control, and in particular relates to a water inrush control method for near-horizontal directional drilling underground in coal mines. Background technique [0002] In recent years, with the continuous development of drilling technology, near-horizontal directional drilling in mines has been widely used in coal seam gas drainage, limestone advance grouting treatment, old empty water advance exploration, and roof water advance release. Due to the advantages of small drilling angle, large drilling depth, and reliable drilling trajectory, during the advanced grouting treatment of coal seam floor limestone, mine near-horizontal directional drilling can be used in a near-horizontal manner in the thin-bed limestone or coal seam floor. The long-distance controlled bedding drilling at the top of the Austrian ash creates conditions for the grouting reconstruction of the limestone aquifer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/04E21B33/138
CPCE21B7/046E21B33/138
Inventor 姬中奎刘英锋郭小铭姬亚东尚荣郭康
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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