CN114622586A

CN114622586A - Method for blocking water in vertical drilling under pressure

Info

Publication number: CN114622586A
Application number: CN202210138662.XA
Authority: CN
Inventors: 吕文宏; 高增胜; 李育刚; 郑天斌; 胡彦飞; 解李超; 薛海鹏
Original assignee: Yulin Yuyang Zhongneng Yuandatan Mining Industry Co ltd; Shaanxi Zhongneng Coalfield Co ltd
Current assignee: Yulin Yuyang Zhongneng Yuandatan Mining Industry Co ltd; Shaanxi Zhongneng Coalfield Co ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2022-06-14

Abstract

The invention discloses a method for blocking water in a vertical drilling hole under pressure, which is characterized in that a continuation pipeline is additionally arranged in the vertical direction of the opening of a water-emitting drilling pipeline, a plurality of water blocking materials are put into the continuation pipeline, accumulated water at the upper part in the drilling pipeline is pumped out after a water-resisting layer is formed, then concrete is poured, the effects of blocking water, reducing pressure, resisting water and blocking in a grading manner are achieved, and the aim of permanent blocking is finally achieved. According to the invention, the water blocking and depressurization of the pressurized water outlet are converted into the non-pressure water outlet for multiple times, and then plugging operation is carried out, so that the operability and reliability of plugging are realized, and the expected plugging effect is achieved. The operability is strong, and the plugging effect is good.

Description

Method for blocking water in vertical drilling under pressure

Technical Field

The invention belongs to the technical field of underground engineering water control, and particularly relates to a method for blocking water in a vertical drilling hole under pressure.

Background

During the production process of the underground mine enterprises, the underground mine enterprises adopt a mode of drilling from the ground to the underground and nesting wear-resistant pipelines to convey materials to the underground, and after the mine is closed, underground water accumulates year by year, and the water level rises accordingly. After years, a catchment area with a large area is formed in an underground goaf, accumulated water in the underground goaf overflows from a ground outlet along a drilling pipeline due to large relief of topography or supply of a confined aquifer, a water column reaches a certain height, the water yield is large, troubles are brought to enterprises, and the drilling pipeline is difficult to plug again due to large water-emitting pressure of the drilling pipeline, or the plugging effect is poor.

Disclosure of Invention

The invention aims to provide a method for blocking water in a vertical drilling hole under pressure, which is characterized in that a water outlet under pressure is converted into a non-pressure water outlet, and then blocking operation is carried out to realize permanent blocking.

The invention adopts the technical scheme that a continuous pipeline is additionally arranged at the opening of a water-emitting drilling pipeline in the vertical direction, a plurality of water blocking materials are put into the continuous pipeline, after a water-resisting layer is formed, accumulated water at the upper part in the drilling pipeline is pumped out, then concrete is poured, the effects of water blocking, pressure reduction, water resisting and plugging are achieved in a grading manner, and the aim of permanent plugging is finally achieved, and the method is implemented according to the following steps:

step 1, calculating the using amount of a water blocking material according to the pipe diameter and the depth, wherein the water blocking material comprises stones, fine sand, cement and clay;

step 2, inserting a vertically arranged continuous pipeline into the opening of the drilling pipeline and fixing the pipeline;

step 3, putting stones into the drilling pipeline to block water and reduce pressure, and putting the stones to the height of 20% -30% of the drilling pipeline;

step 4, putting stones into the drilling pipeline, blocking water and reducing pressure again, wherein the height of the stones and the stones is 40% -50% of the height of the drilling pipeline;

step 5, putting the stone, fine sand and clay mixed material into the drilling pipeline, blocking water and reducing pressure again, stopping water overflow of the drilling pipeline, and enabling the height of the stone, the fine sand and the clay to reach 70% -80% of the height of the drilling pipeline;

step 6, dismantling the continuous pipeline;

step 7, pumping out all accumulated water in the drilling pipeline of which the upper part is not filled with the water blocking material;

and 8, pouring concrete into the drilling pipeline to the opening of the drilling pipeline to realize permanent plugging.

The invention is also characterized in that:

and 3, putting the stone blocks in the step 3, wherein the particle size of the stone blocks is 1/4-1/3 of the aperture of the drilled hole.

And 4, putting the stones into the mixture, wherein the particle size of the stones is about 5-20 mm.

The invention has the beneficial effects that:

according to the method for blocking water in the vertical drilling hole under pressure, water blocking and depressurization are performed for multiple times at the water outlet under pressure, the water outlet is converted into a non-pressure water outlet, and then blocking operation is performed, so that operability and reliability of blocking are realized, and a desired blocking effect is achieved. The operability is strong, and the plugging effect is good.

Drawings

FIG. 1 is a state diagram before the water leakage plugging of the drilling pipeline of the embodiment;

FIG. 2 is a diagram of the embodiment after the drilled pipeline is plugged.

In the figure, 1, water pressure P, 2, a continuation pipeline, 3, a confined aquifer and catchment area, 4, the ground, 5, a water-resisting stratum, 6, a water-containing stratum, 7, a drilling pipeline, 8, an artificial water-resisting stratum and 9, a concrete pouring layer is poured.

Detailed Description

The present invention will be described in detail with reference to the following detailed description and accompanying drawings.

The invention relates to a method for blocking water in a vertical drilling hole under pressure, which is characterized in that a continuation pipeline is additionally arranged in the vertical direction of the upper opening of a water-emitting drilling pipeline, a plurality of water blocking materials are put into the continuation pipeline, after a water-resisting layer is formed, accumulated water at the upper part in the drilling pipeline is pumped out, then concrete is poured, the effects of blocking water, reducing pressure, resisting water and blocking in multiple times are achieved, and the aim of permanent blocking is finally achieved, and the method is implemented according to the following steps:

step 2, inserting a vertically arranged continuation pipeline into the mouth of the drilling pipeline, wherein the connection end of the continuation pipeline and the drilling pipeline is conical, the conical part of the continuation pipeline is inserted into the drilling pipeline and fixed, and a connector of the continuation pipeline allows water leakage for balancing water pressure without flushing out water-blocking materials such as stones and stones;

step 3, putting stones into the drilling pipeline, blocking water, reducing pressure, wherein the particle size of the stones is 1/4-1/3 of the aperture of the drilling hole, and putting the stones to 20% -30% of the height of the drilling pipeline;

step 4, putting stones into the drilling pipeline, blocking water and reducing pressure again, wherein the particle size of the put stones is about 5-20 mm, and the height of the put stones and stones is 40% -50% of the height of the drilling pipeline;

step 5, putting the stone, fine sand and clay mixed material into the drilling pipeline, depressurizing again, stopping water flowing out of the drilling pipeline, and enabling the height of the stone, the stone and the clay to reach 70% -80% of the height of the drilling pipeline;

step 6, dismantling the continuous pipeline;

step 7, pumping out all accumulated water in the upper part (not filled with the water blocking material) of the drilled pipeline;

Examples

In the production process of underground mine enterprises, the requirements of underground engineering such as ventilation, power supply, water supply and drainage, material conveying and the like are realized by using a large number of drilling pipelines. After the underground engineering is abandoned, underground water accumulates year by year, and the water level rises accordingly. Due to the reason that the relief of the landform is large or a confined aquifer is contained, a confined water collecting area with a large area is formed in the abandoned underground engineering space, confined water flows out from an outlet on the ground along a drilling pipeline, the maximum height can reach more than 10m, the water yield reaches more than hundreds of cubic meters per hour, and troubles are brought to enterprises.

The embodiment provides a method for blocking water under pressure in a vertical drilling hole, which is used for blocking confined water gushing of a drilling pipeline of a well mine enterprise and is implemented according to the following steps:

step 3, putting stones into the drilling pipeline to block water and reduce pressure, wherein the particle size of the stones is 1/4-1/3 of the aperture of the drilling hole, the stones are put to the height of 20% -30% of the drilling pipeline, the effect of blocking water and reducing pressure is achieved by putting the stones, and meanwhile, about 70% of space is reserved for the subsequent procedures and the final permanent sealing concrete pouring;

step 4, putting stones into the drilling pipeline, blocking water and reducing pressure again, wherein the particle size of the put stones is about 5-20 mm, the height of the put stones and stones is 40% -50% of the height of the drilling pipeline, blocking water and reducing pressure are further performed, and the left 50% of upper space of the drilling pipeline is not occupied or is less occupied;

step 5, putting the stone, fine sand and clay mixed material into the drilled pipeline, blocking water and reducing pressure again, stopping water overflow of the drilled pipeline, enabling the height of the stone, the stone and the clay to reach 70% -80% of the height of the drilled pipeline, and basically forming a water blocking layer when water outflow is stopped basically;

step 6, dismantling the continuous pipeline;

step 7, pumping out all accumulated water in the pipeline at the upper part of the drilled pipeline (not filled with the water blocking material);

The drilling pipeline of the embodiment is plugged and then is shown in figures 1 and 2, the drilling pipeline is filled with water to form a pressure-bearing catchment area 3 before plugging, the water pressure of the water outflow is P, P >0, the continuation pipeline 2 is additionally arranged at the opening of the water outflow drilling pipeline, the continuation pipeline 2 is located above the ground 4, the water-resisting stratum 5, the water-containing stratum 6, the pressure-bearing aquifer and the catchment area 3 are respectively arranged below the ground, an artificial water-resisting layer 8 is to be formed by putting stones, fine sand, clay and other water-resisting materials into the continuation pipeline 2, the accumulated water at the upper part in the drilling pipeline is pumped, then the pouring concrete is poured, a pouring concrete layer 9 is formed, the effects of water resistance, pressure reduction and plugging in different times are achieved, and finally the permanent plugging is realized.

Claims

1. The utility model provides a vertical drilling area presses water shutoff method, its characterized in that, installs additional in the drilling pipe road junction vertical direction of the running water and continues the pipeline, through to continuing the pipeline in throwing in multiple water blocking material that separates, after waiting to form the water barrier, take out upper portion ponding in the drilling, water pouring concrete again, reach the effect that blocks water, step-down, water proof shutoff by step, finally realize the target of permanent shutoff, specifically implement according to following step:

step 6, dismantling the continuous pipeline;

2. The method for blocking water under pressure in the vertical drilling hole according to claim 1, wherein the particle size of the stone blocks thrown in the step 3 is 1/4-1/3 of the hole diameter of the drilling hole.

3. The method for blocking water under pressure in the vertical drilling hole according to claim 1, wherein the particle size of the stone thrown in the step 4 is about 5-20 mm.

4. The method for blocking water under pressure in a vertical drilling hole according to claim 1, wherein in the step 1, the connection end of the continuous pipeline and the drilling pipeline is conical, and the conical part of the continuous pipeline is inserted into the drilling pipeline and fixed.

5. The method for blocking water under pressure in a vertical drilling hole according to claim 1, wherein the connection end of the continuous pipeline and the drilling pipeline in the step 1 is conical, and the conical part of the continuous pipeline is inserted into the drilling pipeline and fixed.