CN204152475U - Layer-through drilling list pouch hole sealing device - Google Patents

Abstract

The utility model belongs to the field of coal mine ventilation and safety, and relates to an underground layer-penetrating drilling and sealing device. The hole-sealing device of perforated layer drilling and single bladder is a kind of air-inflatable bladder and a thin grouting tube added to one end of the 50mm PE pipe, and the PE tube 3 meters away from the bladder is a sieve flower tube. Before grouting, plug the connected PE sieve flower tube with pouch into the drilled hole, and the distance between the pouch and the orifice is generally 5 meters. Before grouting, inflate the bag with air. The air pressure is 0.3-0.4MPa. After the bag is fully inflated, use a grouting pump to inject special cement slurry until the cement slurry flows out of the flower tube with sieve holes and stop immediately. Grouting. After the slurry is solidified, gas drainage can be carried out through joint holes.

Description

Piercing Drilling Single Capsule Bag Sealing Device

technical field

The utility model belongs to the field of coal mine ventilation and safety, and relates to an underground layer-penetrating drilling and sealing device.

Background technique

The geological structure of the Changping mining area in Shanxi Province is relatively complex, and the roof and floor of the mine field are obviously affected by the structural stress. In recent years, with the increase of the mining depth of the mine and the extension of the mining area to the west, the ground stress, gas content and pressure in the mining area are large. Among them, the original maximum gas in the mining activity area of the four panels has reached 15.09m ³ /t, the original gas pressure is 0.38-0.55Mpa, the initial gas release velocity is 14.3-20.6, and the air permeability coefficient is only 0.0116-0.0520m ² / (MPa ² d), the sealing quality of the drainage boreholes constructed at the same time is poor, the sealing time is long, and the air leakage is large at the orifice. The extraction concentration is low.

Contents of the invention

The utility model is designed to solve the characteristics of air leakage by using polyurethane to seal the hole after drilling and drilling. In the past, polyurethane sealing was used to seal the hole with large air leakage and low gas concentration. It provides A new type of single-pocket bag sealing device for perforated drilling has been developed, which has achieved good sealing performance after perforated drilling and sealing, simple operation and fast sealing speed, and improved drainage concentration and drainage volume of single drilling holes. .

The utility model is realized by adopting the following technical solutions:

A device for perforating holes with a single-bag sealing device, which includes a main pipe, a single-bag bag is sealed in the middle of the main pipe, and a number of sieve holes are opened on the wall of the tail of the main pipe; it also includes a grouting fine tube and an inflation tube, the thin grouting tube seals through the single bladder bag, and the inflation tube seals and extends into the single bladder bag.

Specifically, the main pipe is composed of three PE pipes connected in sequence through joints. Each PE (polyethylene) pipe has a length of 4m and a diameter of 50mm. The two ends of the single capsule bag are respectively sealed and assembled outside the middle PE pipe through clamps; the maximum diameter of the single capsule bag after expansion is 120-150mm; there are several screens on the wall of the PE pipe on the left. hole.

One end of the grouting thin tube is sealed through the single bladder bag, and the other end is extended to the outside of the PE tube on the right.

One end of the inflation tube seals and extends into the single bladder bag, and the other end extends out of the PE tube on the right.

Before grouting, insert the innermost PE pipe with sieve holes into the drill hole, and connect it with the PE pipe with a single bag in the middle; then insert the PE pipe with a single bag in the middle into the drill hole , the single bladder is also plugged into the borehole, and the distance between the single bladder and the orifice is 5 meters. The outermost PE pipe exposes 300mm-500mm, and then connect the inflation pipe to the high-pressure air pipe to inject air into the single bag, and the inflation air pressure is 0.3-0.4MPa. After the air is injected, the grouting work can be carried out. After the grouting pipe is connected, the special grout is injected, and the condition of the outermost PE pipe is observed. When the outermost PE pipe has grout flowing out, the grouting work is stopped immediately. After the slurry is solidified, gas drainage can be carried out through joint holes.

The technical conditions for sealing holes are as follows:

The air pressure of the bladder bag is 0.3-0.4MPa;

The use requirements of this hole sealing device must be met when the upward hole is constructed and the diameter of the hole is between 85mm and 95mm;

The mixing ratio of water and special cement is 2:1;

The maximum diameter of the single bladder after expansion is 120-150mm;

The inflation retention time of the single bladder bag lasted for 24 hours.

The technical requirements for the use of the single-pocket bag sealing device for drilling through layers are as follows:

1. Check the air pressure and whether the air supply pressure meets the technical requirements (0.3-0.4MPa);

2. Check whether the pouch is intact and whether the three sealed PE pipes are connected well;

3. Check whether the inflatable pipe and the thin grouting pipe are well connected;

4. Check whether it is special sealing cement;

5. Check whether the ratio of water and special sealing cement is 2:1.

The utility model has a reasonable design. The single-bag sealing device for drilling through layers adopts a PE pipe with a diameter of 50mm and a single-bag. The cement slurry can be injected, and after the cement slurry is solidified, the holes can be connected for gas drainage to achieve the best sealing effect.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure, 1-PE pipe, 2-single bladder, 3-joint, 4-inflatable pipe, 5-short grouting tube, 6-sieve hole, 7-coal (rock) layer, 8-perforated layer drilling.

Detailed ways

Specific embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.

A perforated drilling single-bag sealing device, as shown in Figure 1, includes a main pipe, the main pipe is composed of three PE pipes 1 sequentially connected together through outer wire rectangular joints 3, each PE pipe 1 The length is 4m, the diameter is 50mm, and the outer circumference of the PE pipe 1 in the middle is covered with a single capsule bag 2, and the two ends of the single capsule bag 2 are sealed and assembled outside the PE pipe 1 in the middle through clamps respectively; The maximum diameter of the expanded single pouch 2 is 120-150mm; the PE tube on the left (ie, the innermost PE tube) 1 has a number of mesh holes 6 on the tube wall.

One end of the grouting thin tube 5 is sealed through the single bladder 2, and the other end extends to the outside of the PE tube 1 on the right, that is, the PE tube at the outermost end.

One end of the inflation tube 4 seals and extends into the single pouch 2, and the other end extends out of the PE tube 1 on the right, that is, the PE tube at the outermost end.

When in use, three PE pipes with a diameter of 50 mm are connected to each other in the hole-sealing process of drilling through layers, and a flower pipe with a sieve hole is used at the innermost end, and a PE pipe with a single bag is installed in the middle. Tube, the grouting thin tube passes through the single bladder, the inflation tube extends into the single bladder, and there is a valve at the outer end of the inflation tube. The outermost PE pipe should be bundled with an equal-length inflation pipe and grouting pipe. The inflation pipe is connected with the inflation pipe, and the grouting pipe is connected with the grouting pipe.

Before grouting, first inflate the single bag with air, the air pressure is 0.3-0.4MPa, after the bag is fully inflated, use a grouting pump to inject special cement slurry until the cement slurry flows out from the flower tube with sieve holes and immediately Stop grouting. After the slurry is solidified, gas drainage can be carried out through joint holes.

Claims (3)

1. a layer-through drilling list pouch hole sealing device, is characterized in that: comprise a supervisor, and periphery, the middle part sealing shroud of described supervisor is equipped with a single pouch, and the afterbody tube wall of described supervisor has some sieve apertures;

Also comprise slip casting tubule and gas tube, described slip casting tubule hermetically passing list pouch, single pouch is stretched in described gas tube sealing.

2. layer-through drilling list pouch hole sealing device according to claim 1, it is characterized in that: described supervisor manages (1) by the PE that three are connected in turn by joint (3) and forms, the length of every root PE pipe (1) is 4m, diameter is 50mm, be positioned at middle PE pipe (1) periphery and be set with a single pouch (2), the two ends of described single pouch (2) realize sealing being assemblied in respectively by clip and are positioned at middle PE pipe (1) outward; Maximum gauge after described single pouch (2) expansion is 120-150mm; Be positioned at the left side PE pipe (1) tube wall on have some sieve apertures (6);

Described slip casting tubule (5) one end hermetically passing list pouch (2), the other end extend to the PE being positioned at the right and manage (1) outward;

Single pouch (2) is stretched in the sealing of described gas tube (4) one end, the other end extends to the PE being positioned at the right and manages (1) outward.

3. layer-through drilling list pouch hole sealing device according to claim 2, is characterized in that: described joint (3) is outer silk rectangle joint.