CN207229060U - A kind of rock body quality of mine drilling gas blocks extraction Intergration system - Google Patents

Abstract

The utility model discloses an integrated gas plugging and extraction system for the drilling of rock mass in mines, which solves the problems of poor internal sealing effect, high cost of drainage and poor double sealing effect in the prior art. problem, it has the effect of improving the stability of the plugging process and the gas drainage process, and enhancing the sealing performance; its technical solution is: including a cone head, a type II plugging unit and two type I plugging units, the type II plugging unit The tail of the blocking unit is connected with a side leakage valve; the type II blocking unit is set between two type I blocking units, and its head is connected to a type I blocking unit through a collection tube and forms a collection cavity with the inner wall of the borehole , its tail is connected to another type I plugging unit through a connecting pipe and forms a sealed cavity with the inner wall of the borehole; the type I plugging unit located at the head of the type II plugging unit is connected to the cone head; the plugging material simultaneously expands and passes through The type I sealing unit and the type II sealing unit connected by the connecting pipe and the sealing cavity realize triple sealing.

Description

An integrated system for gas plugging and drainage of rock mass drilling in mines

technical field

The utility model belongs to the technical field of drilling and drainage of rock mass in mines, and in particular relates to an integrated system for drilling gas plugging and extraction of rock mass in mines.

Background technique

Gas pressure and gas content are important parameters to indicate the state of coal seam gas occurrence. It is a key basic parameter in the study of coal and gas outburst, gas gushing, and gas drainage in mines. Therefore, in order to study the law of coal seam gas occurrence and gushing, it is necessary to carry out coal seam gas pressure and gas content. Determination. According to the relevant regulations of the coal industry standards, the pressure measurement drilling site should be selected in the roadway adjacent to the coal seam, and generally the upward drilling should be drilled in the complete and hard coal rock.

The traditional borehole sealing method is to fill the borehole with concrete filling material, install a baffle in the borehole to form a sealed space, and pour the filling material into the sealed space through a separate pipeline. In the above-mentioned plugging methods, the plugging medium is mostly solid medium. After the solid medium is solidified, it is easy to cause cracks in the rock mass or the solid material cannot seal the cracks in the rock mass around the drilling wall of the corresponding section; and the traditional gas drainage system Only double plugging can be formed, and the sealing effect on the borehole is poor. Traditional gas drainage systems are mostly disposable consumables, which generally cannot be reused, which increases the cost of gas drainage and cannot effectively collect gas.

It can be seen that the existing problems need to be further solved.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides an integrated system for gas plugging and drainage of mine rock mass drilling, which improves the stability of the plugging process and the gas drainage process; the flexible medium is used to expand and seal at the same time The plugging unit and the sealing cavity realize triple plugging, which further ensures the sealing effect of the drilling.

The utility model adopts the following technical solutions:

The utility model provides a gas plugging test probe for drilling rock mass in a mine, which includes a cone head, a type II plugging unit and two type I plugging units, and the tail of the type II plugging unit is connected with a side leakage valve The Type II plugging unit is located between two Type I plugging units, and its head is connected to a Type I plugging unit through a collection tube and forms a collection cavity with the inner wall of the borehole, and its tail is connected to another type I plugging unit through a connecting tube. Type I plugging unit forms a sealed cavity with the inner wall of the borehole; the type I plugging unit located at the head of the type II plugging unit is connected to the cone head; And type II sealing unit and sealing cavity to realize triple sealing.

Further, the type I blocking unit includes a type I tubular joint, a first blocking capsule and a fourth switch, the fourth switch is arranged on one side of the circumferential direction of the type I tubular joint, and the first blocking capsule Wrapped on the outside of the I-type tubular joint, the inside of the I-type tubular joint is provided with a channel for accommodating the blocking material.

Further, both ends of the I-type tubular joint are provided with protrusions, a groove is formed between the protrusions, and a through hole for the fourth switch to pass is formed on one side of the groove.

The fourth switch includes a cap and a first spring, one end of the cap is connected to the inner wall of the I-type tubular joint through the first spring, and the other end of the cap is arranged on the outside of the I-type tubular joint.

Further, the cap has a T-shaped structure, a cap set is provided on the inside of the cap, and the cap set is fixed on the outside of the through hole and first small holes are provided on both sides.

When the first spring is in a free state, the cap blocks the first small hole; when the first spring is in a compressed state, the cap pops up, and the passage passes through the first small hole, the first blocking capsule and the I-type tubular joint The cavities between are connected.

Further, the type II blocking unit includes a type II tubular joint, a second blocking capsule and a fifth switch, the fifth switch is arranged on one side of the circumferential direction of the type II tubular joint, and the second blocking capsule Wrapped on the outside of the Type II tubular joint, the inside of the Type II tubular joint is provided with a channel for containing the blocking material.

Further, one end of the Type II tubular joint is provided with a depression, and the other end is provided with a protrusion, a groove is formed between the depression and the protrusion, and a through hole is provided on one side of the groove.

Further, the side leakage valve includes a base pipe, a rubber ball, a second spring and an adjusting nut, and the inner rear side of the base pipe is symmetrically provided with a second small hole along the axis, and a rubber ball is arranged in the second small hole , the rear side of the rubber ball is in contact with one end of the second spring, and the other end of the second spring is in contact with the adjusting nut.

Further, the collection tube is provided with a number of third small holes, and two opposite one-way sealing strips are arranged in the third small holes; an opening facing the inner wall of the collection tube is formed between the two one-way sealing strips , the gas enters the collection pipe through the one-way sealing strip, and the one-way sealing strip prevents the plugging material from entering the borehole directly through the third small hole.

The utility model also provides a mine rock mass drilling gas plugging extraction system, including a propulsion system, a supply system and a test probe, the propulsion system is connected to the tail of the test probe, and pushes the test probe to a designated position in the borehole ; The supply system provides the plugging material with a set pressure to the test probe.

Further, the propulsion system includes a drill pipe and a drilling rig, and the drill pipe is connected to the tail of the test probe; the supply system is provided with a supply console, and the supply console is provided with sequentially connected first switch, pressure A meter, a flow meter, and a second switch, the second switch is connected to the drill pipe through a hose.

Compared with the prior art, the beneficial effects of the utility model are:

(1) The utility model adopts the triple sealing method of type I sealing unit, type II sealing unit and sealing cavity, and cooperates with flexible sealing medium, which not only strengthens the sealing effect of the drilling, but also can seal the rock around the drilling in the sealing section. Body cracks play a sealing role, further improving the sealing effect;

(2) The Type I plugging unit and the Type II plugging unit of the present utility model are provided with a switch, and the switch remains closed when the spring is in a normal state. Only when the Type I plugging unit and the Type II plugging unit are filled with When filling materials, because the plugging material exerts pressure on the spring to make the switch pop up, the plugging material flows from the corresponding small hole to the drilled hole; increasing the sealing performance and filling effect of the equipment;

(3) The afterbody of the Type II plugging unit of the present utility model is connected with a side leakage valve, and the pre-tightening force of the spring can be adjusted by the adjusting nut in the rotation side leakage valve to adjust the opening pressure of the rubber ball; the side leakage valve has a certain After the initial opening pressure, the plugging capsule swells and drills to form a sealing cavity and a collection cavity, the flexible sealing medium enters the sealing cavity through the side leakage valve, which is conducive to enhancing the sealing effect of the sealing cavity on the drilling;

(4) The collection pipe of the present utility model is provided with a one-way sealing strip that only opens to the inner wall of the collection pipe, so that the gas in the borehole can enter the collection pipe through the opening between the one-way sealing strips, and at the same time, the gas in the expansion type I The plugging unit, the type II plugging unit, can prevent the flexible plugging medium from directly entering the drill hole through the third small hole.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application, and do not constitute improper limitations to the present application.

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

Fig. 2 is a schematic diagram of the gas extraction state of the utility model;

Fig. 3 is the structural representation of test probe of the present utility model;

Fig. 4 is the structural representation of the cone head of the present utility model;

Fig. 5 is the structural representation of the I-type plugging unit of the present utility model;

Fig. 6 is a schematic structural diagram of a fourth switch of the present invention;

Fig. 7 is a schematic structural view of the collection tube of the present invention;

Figure 8 is a partial enlarged view of the collection tube of the utility model;

Fig. 9 is a structural schematic diagram of the connecting pipe of the present invention;

Fig. 10 is a structural schematic diagram of a type II plugging unit of the present invention;

Fig. 11 is a structural schematic diagram of a side leakage valve of the present invention;

Fig. 12 is a sectional view of the side leakage valve of the present utility model;

Among them, 1. Coal and rock mass, 2. Drilling hole, 3. Cone head, 4. Type I sealing unit, 5. Type II sealing unit, 6. Sealing cavity, 7. Acquisition cavity, 8. Connecting pipe , 9, collection tube, 10, drill pipe, 11, hose, 12, drilling rig, 13, supply console, 14, first switch, 15, pressure gauge, 16, flow meter, 17, second switch, 18, Collection console, 19, third switch, 20, gas pressure gauge, 21, electronic pressure gauge, 22, collection tank, 23, one-way stop valve, 24, flexible plugging medium, 25, side leakage valve, 26, II Type tubular joint, 27, the second plugging capsule, 28, cap, 29, the first spring, 30, the first small hole, 31, the third small hole, 32, one-way sealing strip, 33, base pipe, 34, Rubber ball, 35, the second spring, 36, the second small hole, 37, the adjusting nut, 38, the fourth switch, 39, I-type tubular joint, 40, the first plugging capsule, 41, the fifth switch.

Detailed ways

It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.

As introduced in the background technology, in the prior art, there are deficiencies in the poor sealing effect in the borehole of the mine rock mass, high extraction cost, and poor double sealing effect. In order to solve the above technical problems, this application proposes a mine An integrated system for gas plugging and drainage of rock mass drilling.

In a typical implementation of the present application, as shown in Figure 3-Figure 12, a mine rock mass drilling gas plugging test probe is provided, including a cone head 3, a type II plugging unit 5 and two I Type II blocking unit 4, the tail of the II type blocking unit 5 is connected with a side leakage valve 25; the II type blocking unit 5 is arranged between two I type blocking units 4, and its head passes through the collection pipe 9 Connect a type I blocking unit 4 and form a collection cavity 7 with the inner wall of the borehole 2, and its tail is connected to another type I blocking unit 4 through a communication pipe 8 and form a sealed cavity 6 with the inner wall of the borehole 2; The type I plugging unit 4 at the head of the type plugging unit 5 is connected to the cone head 3; the plugging material swells at the same time through the connecting pipe 8 to connect the I type plugging unit 4 and the II type plugging unit 5 and the sealing cavity 6, Realize triple blocking.

As shown in FIG. 4 , the cone head 3 is arranged on the head of the test probe, and is threadedly connected with the I-type sealing unit 4 to play a guiding role.

As shown in Figures 7 and 8, one end of the collection tube 9 is threaded with the Type I plugging unit 4 of the test probe head, and the other end is threaded with the Type II plugging unit 5; There are several third small holes 31, and two one-way sealing strips 32 are installed in the third small holes 31. The opening formed between the 32 is only opened to the inner wall of the collection pipe 9, so that the gas in the borehole 2 can enter the collection pipe 9 through the opening between the one-way sealing strips 32, and at the same time, the gas in the expansion type I plugging unit 4, II The type plugging unit 5 can prevent the flexible plugging medium 24 from entering the borehole 2 directly through the third small hole 31 .

As shown in Fig. 5 and Fig. 6, described I-type blocking unit 4 has two, is respectively positioned at the afterbody of test probe and head, and described I-type blocking unit 4 comprises I-type tubular connector 39, the first blocking capsule 40 and the fourth switch 38, the I-type tubular joint 39 has a tubular structure with two ends protruding and a middle depression, and the first plugging capsule 40 surrounds and is fixed in the middle concave part of the I-type tubular joint 39, and the I-type tubular joint A channel is provided inside the joint 39 ; the fourth switch 38 is fixed in the middle of the outer pipe wall of the I-shaped tubular joint 39 and is arranged inside the first blocking capsule 40 .

The fourth switch 38 includes a cap 28, a first spring 29 and a cap set, the cap 28 is a T-shaped structure, the two sides of the top of the cap 28 are provided with vertical plates, and the bottom of the cap 28 passes through an I-shaped tubular joint 39 to Inside, connecting plates are provided on both sides of the bottom of the cap 28 , and the connecting plates are connected to the inner wall of the I-shaped tubular joint 39 through the first spring 29 .

The cap set is fixed on the outside of the I-type tubular joint 39 to match the cap 28. The inside of the cap set is a cavity, and both sides are provided with first small holes 30; In the closed state, the vertical plate happens to seal the first small hole 30; when filling the plugging material, the plugging material with a certain pressure pushes up the cap 28, and the inside of the I-shaped tubular joint 39 forms a passage with the first small hole 30, At this time, the plugging material enters the cavity of the I-shaped tubular joint 39 and the first plugging capsule 40 through the first small hole 30, and the first plugging capsule 40 swells.

The plugging material is a flexible plugging medium 24 in a fluid state.

Described II type blocking unit 5 is one, is arranged between two I type blocking units 4, as shown in Figure 10, II type blocking unit 5 comprises the second blocking capsule 27, II type tubular joint 26 and The fifth switch 41 , the structure and arrangement of the fifth switch 41 are the same as those of the fourth switch 38 , which will not be repeated here.

One end of the Type II tubular joint 26 is provided with a depression, and the other end is provided with a protrusion, a groove is formed between the depression and the protrusion, and a through hole is provided on one side of the groove; The type II tubular joint 26 is internally provided with a channel for containing sealing material.

The recess at the tail of the Type II tubular joint 26 is threadedly connected to the side leakage valve 25 .

As shown in FIGS. 11 and 12 , the side leakage valve includes a base pipe 33 , two second springs 35 , two rubber balls 34 , two second small holes 36 and two adjusting nuts 37 . The base pipe 33 is a cylindrical pipe structure, one end of which is provided with a stepped passage, and the stepped passage is threadedly connected to the recessed portion of the tail of the Type II blocking unit 5, and the recessed portion is arranged inside the stepped passage.

The rear side of the stepped passage is provided with a cylindrical passage with an inner diameter smaller than the stepped passage, and the two sides of the cylindrical passage are symmetrically provided with a second small hole 36, and the second small hole 36 is a stepped hole, and one end thereof is connected to the step. The other end communicates with the drilled hole 2; a rubber ball 34 is provided at the step of the second small hole 36, and the rear side of the rubber ball 34 is provided with a second spring 35 and an adjusting nut 37. The adjusting nut 37 can adjust the preload of the second spring 35 to adjust the opening pressure of the rubber ball 34 .

The flexible sealing medium 24 can enter the sealing cavity 6 through the side leakage valve 25, which can not only seal the borehole 2, but also further seal the rock mass fissures around the borehole 2. At the same time, the flexible plugging medium 24 can also enter the collection cavity 7 through the side leakage valve 25, and use its high pressure to further destroy the rock mass fissures around the collection cavity 7 to increase the permeability of the cracks. After that, the flexible plugging medium 24 passes through the collection tube. The third small hole 31 on the 9 and the one-way sealing strip 32 enter the collecting tube 9 and discharge.

In another embodiment of the present application, as shown in Fig. 1, a mine rock mass drilling gas plugging and extraction system is provided, including a propulsion system, a supply system and a test probe, the structure of the test probe is the same as the above-mentioned The implementation is the same.

The propulsion system is connected to the tail of the test probe, and pushes the test probe to a designated position in the borehole 2; the supply system provides plugging material with a set pressure to the test probe.

The propulsion system includes a drill rod 10 and a drill rig 12. The drill rod 10 is connected to the tail of the test probe to play the dual functions of lengthening and propulsion. The drill rig 12 pushes the test probe to the designated position of the borehole through the drill rod 10.

The supply system is provided with a supply console 13, and the supply console 13 is provided with a first switch 14, a pressure gauge 15, a flow meter 16, and a second switch 17 connected in sequence, and the second switch 17 passes through the hose 11 Connected with drill pipe 10.

The supply console 13 provides a certain pressure of the flexible sealing medium 24 into the test probe through the hose 11 and the drill pipe 10 .

The pressure gauge 15 is used to observe the pressure of the flexible sealing medium 24 provided by the supply operation platform 13 , and the flow gauge 16 is used to read the flow rate of the flexible sealing medium 24 .

The gas drainage process in borehole 2 is as follows:

(1) Gas drainage drilling 2: Use the drilling rig 12 to drill holes 2 at specified angles into the roof or floor coal rock mass 1 in the roadway until reaching the coal seam in the designated drainage area.

(2) Install the test probe: clean up the sundries in the borehole 2, connect the cone head 3, the I-type plugging unit 4, the collection tube 9, the II-type plugging unit 5, the connecting pipe 8, etc., and connect the tail of the test probe The I-type plugging unit 4 is connected with the drill pipe 10, and the installed test probe is pushed to the designated drainage area by the drill rig 12.

(3) Sealing the borehole 2: After the test probe reaches the designated area, use the hose 11 to connect the supply console 13 and the drill pipe 10, and provide a flexible sealing medium 24 with a certain pressure into the test probe.

First, the first switch 14 of the supply console 13 is turned on, and the flexible sealing medium 24 enters the type I sealing unit 4 and the type II sealing unit 4 through the corresponding fourth switch 38 and fifth switch 41 through the communication pipe 8 and the collection pipe 9. In the blocking unit 5, the first blocking capsule 40 and the second blocking capsule 27 are inflated to form the sealing cavity 6 and the collection cavity 7 respectively.

Continue to increase the pressure of the flexible sealing medium 24, the side leakage valve 25 opens, the flexible sealing medium 24 enters the sealing cavity 6 through the second small hole 36, fills the sealing cavity 6, and further fills the surrounding area of the sealing cavity 6 Rock mass fissure, at this moment, the type I plugging unit 4, type II plugging unit 5 and the sealing cavity 6 of the test probe tail form a triple drilling seal, and after the flowmeter 16 indication on the supply operation platform 13 is stabilized, Turn off the first switch 14, turn on the second switch 17, remove the flexible blocking medium 24 in the communication pipe 8 and the collection pipe 9, and keep the inside of the pipe unobstructed.

(4) Pressure test: After the sealing is completed, do a pressure test to check the sealing effect. If the sealing is unqualified, the hole needs to be sealed again.

In yet another embodiment of the present application, as shown in Figure 2, a mine rock mass drilling gas measurement system is provided, the measurement system includes a collection system and a test probe, and the main body of the collection system is a collection operation platform 18, including a collection tank 22, an electronic pressure gauge 21 and a gas pressure gauge 20, the collection tank 22, the electronic pressure gauge 21 and the gas pressure gauge 20 are connected in sequence through pipelines, and the gas pressure gauge 20 is connected to the Type I gas pressure gauge through pipelines The blocking unit 4 is connected.

A one-way stop valve 23 is provided on the pipeline between the collection tank 22 and the electronic pressure gauge 21 , and a third switch 19 is provided on the pipeline between the gas pressure gauge 20 and the I-type blocking unit 4 .

The collection console 18 is used to collect the gas in the collection cavity 7, the gas pressure gauge 20 is used to read the gas pressure indication, and the electronic pressure gauge 21 and the gas pressure gauge 20 are mutually calibrated to ensure the gas pressure Accuracy of parameters. The one-way stop valve 23 ensures that the gas can only flow into the collection tank 22 in one direction.

After the withstand voltage test, the gas measurement operation is carried out. The specific process is as follows:

Connect the collection console 18, turn on the third switch 19, the gas enters the collection pipe 9 through the third small hole 31 of the collection pipe 9, and enters the collection console 18 through the connecting pipe 8, etc. After the gas pressure gauge 20 is stabilized, read Take the reading of the gas pressure gauge 20 and compare it with the reading of the electronic pressure gauge 21. When the two values are roughly equivalent, take the average value of the two values to display the value of the gas pressure in the collection cavity 7, and finally The gas collected in the collection tank 22 is analyzed for composition and content.

The parts not mentioned in the utility model can be realized by adopting or referring to the prior art.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (10)

1. a kind of rock body quality of mine drilling gas blocks test probe, it is characterised in that including conehead, II types closure unit and two I types block unit, and the afterbody of the II types closure unit is connected with side leakage valve；The II types closure unit is arranged on two I types and seals Between stifled unit, its stem connects an I types closure unit by collection tube and forms collection cavity, its afterbody with drill hole inner wall By connecting another I types closure unit communicating pipe and forming sealing cavity with drill hole inner wall；Arranged on the I of II types closure unit header Type closure unit is connected with conehead.

A kind of 2. rock body quality of mine drilling gas closure test probe according to claim 1, it is characterised in that the I types Blocking unit includes I-tube straight coupling, the first closure capsule and the 4th switch, and the 4th switch is arranged on I-tube straight coupling Circumferential side, the first closure capsule are coated on the outside of I-tube straight coupling, and being internally provided with for the I-tube straight coupling is logical Road.

A kind of 3. rock body quality of mine drilling gas closure test probe according to claim 2, it is characterised in that the I types The both ends of tubular configured joint are equipped with lug boss, and groove is formed between the lug boss, and the side of the groove is equipped with opens for the 4th Close through through hole；

4th switch includes block and the first spring, and one end of the block passes through the first spring and I-tube straight coupling Inner wall is connected, and the other end of the block is arranged on the outside of I-tube straight coupling.

A kind of 4. rock body quality of mine drilling gas closure test probe according to claim 3, it is characterised in that the block In T-Type structure, the inner side of the block is equipped with block external member, and the block external member is fixed on the outside of through hole and both sides are set There is the first aperture.

A kind of 5. rock body quality of mine drilling gas closure test probe according to claim 1, it is characterised in that the II types Blocking unit includes II types tubular configured joint, the second closure capsule and the 5th switch, and the 5th switch is arranged on II type tubular configured joints Circumferential side, the second closure capsule is coated on the outsides of II type tubular configured joints, and the inside of the II types tubular configured joint is set There is passage.

A kind of 6. rock body quality of mine drilling gas closure test probe according to claim 5, it is characterised in that the II types One end of tubular configured joint is equipped with concave part, and the other end is equipped with lug boss, groove is formed between the concave part and lug boss, described The side of groove is equipped with through hole.

A kind of 7. rock body quality of mine drilling gas closure test probe according to claim 1, it is characterised in that the side leakage Valve includes basal body pipe, ball, second spring and adjusting nut, and described matrix pipe inner back side is small equipped with second along axisymmetrical Hole, is equipped with ball, the rear side of the ball and the end thereof contacts of second spring, the second spring in the second orifice The other end contacted with adjusting nut.

A kind of 8. rock body quality of mine drilling gas closure test probe according to claim 1, it is characterised in that the collection Pipe is equipped with some 3rd apertures, and two one-way sealing strip of paper used for sealings being oppositely arranged are equipped with the 3rd aperture；Two one-way sealings The opening towards collection inside pipe wall is formed between bar.

9. a kind of rock body quality of mine drilling gas blocks extraction system, it is characterised in that including propulsion system, feed system and according to Any test probes of claim 1-7, the afterbody of the propulsion system connecting test probe, test probe is advanced into Designated position in drilling；The feed system provides the plugging material of setting pressure into test probe.

10. a kind of rock body quality of mine drilling gas closure extraction system according to claim 9, it is characterised in that described to push away Include drilling rod and drilling machine, the afterbody of the drilling rod connecting test probe into system；The feed system is equipped with supply operation console, The supply operation console is equipped with the first switch being sequentially connected, pressure gauge, flowmeter, second switch, and the second switch leads to Hose is crossed with drilling rod to be connected.