Double-end water plugging device for observing overlying strata water flowing fractured zone

Abstract

The utility model belongs to the technical field of water plugging devices, and particularly discloses a double-end water plugging device for observing an overlying strata water flowing fractured zone. The double-end water plugging device comprises a drill rod, a first plugging capsule, a second plugging capsule, a water injection mechanism and a supporting mechanism. Wherein a first blocking capsule and a second blocking capsule are arranged at the rear end and the front end of the drill rod respectively, the water injection mechanism is used for injecting water into the drilling water injection pipe and the capsule water injection pipe, and the supporting mechanism can extend outwards in the radial direction of the drill rod so as to support and protect the first blocking capsule and the second blocking capsule. According to the double-end water plugging device, the supporting mechanism is additionally arranged to support and protect the first plugging capsule and the second plugging capsule, so that abrasion and damage of the wall of a drill hole to the plugging capsules in the pushing process of the double-end water plugging device are reduced, and it is guaranteed that the follow-up observation process of an overlying strata water flowing fractured zone is smoothly conducted; meanwhile, the service life of the plugging capsule is prolonged, and the economic cost is saved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of water plugging devices, and particularly relates to a double-end water plugging device for observing the water-conducting fissure zone in overlying strata. Background Art

[0002] In China, coal mines are mainly exploited by underground mining. Mine monitoring is an important part of ensuring the safe exploitation of coal mines. The double-end water plugging device is one of the main equipment for detecting the development degree of surrounding rock fissures. The process of installing the double-end water plugging device includes constructing a detection borehole, pushing the double-end water plugger into the detection borehole manually, installing a drill pipe at the bottom of the double-end water plugger, and then detecting the development degree of deep rock mass fissures in the detection borehole by adding drill pipes.

[0003] At present, the existing double-end water plugging devices usually inflate or fill water into a rubber sealing capsule to perform double-end plugging on a certain section of the borehole. Since the borehole wall is rough and hard, when the double-end water plugging device is inserted into a certain section of the borehole, the sealing capsule is prone to friction and damage with the borehole wall, affecting the plugging effect of the borehole section.

[0004] Therefore, the utility model provides a double-end water plugging device for observing the water-conducting fissure zone in overlying strata. Content of the Utility Model

[0005] The purpose of the utility model is to provide a double-end water plugging device for observing the water-conducting fissure zone in overlying strata, which can reduce the wear and damage of the borehole wall to the sealing capsule during the process of pushing the double-end water plugging device into the target section of the borehole.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A double-end water plugging device for observing the water-conducting fissure zone in overlying strata, comprising a drill pipe, a first sealing capsule and a second sealing capsule;

[0008] The first sealing capsule and the second sealing capsule are respectively arranged at the rear end and the front end of the drill pipe. Among them, a drill bit is arranged at the front end of the drill pipe for the second sealing capsule, and a borehole water outlet is arranged at the position between the first sealing capsule and the second sealing capsule on the drill pipe;

[0009] A borehole water injection pipe and a capsule water injection pipe are further arranged in the drill pipe. Among them, the water outlet of the borehole water injection pipe is communicated with the borehole water outlet, and the water outlets of the capsule water injection pipe are respectively communicated with the interiors of the first sealing capsule and the second sealing capsule;

[0010] The water inlets of the borehole water injection pipe and the capsule water injection pipe are both connected with a water injection mechanism, and the water injection mechanism can inject water into the borehole water injection pipe and the capsule water injection pipe;

[0011] A support mechanism is also provided on the drill pipe, and the support mechanism can extend radially outward along the drill pipe.

[0012] Preferably, the support mechanism includes a telescopic rod, a collar, a first connecting rod, a second connecting rod, and a support plate;

[0013] The cylinder end of the telescopic rod is connected to the drill pipe, and the telescopic end of the telescopic rod is connected to the collar;

[0014] The collar is sleeved on the drill pipe, and the telescopic end of the telescopic rod expands and contracts relative to the cylinder end to drive the collar to move along the axial direction of the drill pipe; one end of the first connecting rod is hinged to the side wall of the collar, and the other end of the first connecting rod is hinged to the second connecting rod; one end of the second connecting rod is hinged to the drill pipe, and the other end of the second connecting rod is connected to the support plate.

[0015] Preferably, the first connecting rod, the second connecting rod, and the support plate form a set of support components, and multiple sets of support components are arranged symmetrically about the axial direction of the drill pipe.

[0016] Preferably, the outer contour of the support plate is arc-shaped.

[0017] Preferably, the water injection mechanism includes an underground water supply pipeline, a water injection pump, a first water injection pipeline, and a second water injection pipeline. Among them, the water inlet of the water injection pump is connected to the underground water supply pipeline, and the water outlet of the water injection pump is connected to the water inlet of the first water injection pipeline and the water inlet of the second water injection pipeline through a three-way valve;

[0018] A first regulating valve, a first pressure gauge, a flow meter, and a first pressure relief valve are provided on the first water injection pipeline, and the water outlet of the first water injection pipeline is connected to the water inlet of the borehole water injection pipe;

[0019] A second regulating valve, a second pressure gauge, and a second pressure relief valve are provided on the second water injection pipeline; the water outlet of the second water injection pipeline is connected to the water inlet of the capsule water injection pipe.

[0020] Preferably, both the first plugging capsule and the second plugging capsule are made of rubber material.

[0021] The beneficial effects of the present utility model are as follows:

[0022] The present utility model provides a double-end water plugging device for observing the water-conducting fissure zone in overlying strata. The double-end water plugging device realizes double-end plugging of the target section of the borehole by injecting water into the first plugging capsule and the second plugging capsule through the water injection mechanism. At the same time, the water injection mechanism injects water into the borehole plugging area through the borehole water outlet, and uses instruments such as pressure gauges and flow meters to observe and record the water injection leakage volume of the test hole section, so as to quantitatively judge the degree of fissure development and further master the maximum development height of the water-conducting fissure zone.

[0023] The double - end water - plugging device of the utility model supports and protects the first plugging capsule and the second plugging capsule by adding a support mechanism, reduces the abrasion and damage of the plugging capsule by the borehole wall during the pushing process of the double - end water - plugging device, ensures the smooth progress of the subsequent observation process of the water - conducting fissure zone in overlying strata, and at the same time extends the service life of the plugging capsule, saving economic costs to a certain extent. The double - end water - plugging device of the utility model has a simple structure, is convenient and practical, is relatively convenient for later maintenance and replacement of accessories, and is low - cost and easy to promote. Brief Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the structural connection relationship of the utility model;

[0025] Figure 2 It is a partial structural schematic diagram after water injection and plugging of the utility model;

[0026] Figure 3 It is a structural schematic diagram of the support mechanism of the utility model Figure 1 ;

[0027] Figure 4 It is a structural schematic diagram of the support mechanism of the utility model Figure 2 ;

[0028] Figure 5 It is a layout schematic diagram of the borehole water injection pipe and the capsule water injection pipe of the utility model;

[0029] Figure 6 It is a structural schematic diagram of the water injection mechanism of the utility model;

[0030] Among them, 11 - the first plugging capsule, 12 - the second plugging capsule, 13 - the drill pipe, 131 - the borehole water outlet, 14 - the borehole water injection pipe, 15 - the capsule water injection pipe, 16 - the drill bit;

[0031] 2 - the support mechanism: 21 - the telescopic rod, 22 - the collar, 23 - the first connecting rod, 24 - the second connecting rod, 25 - the support plate;

[0032] 3 - the water injection mechanism: 30 - the underground water supply pipeline, 31 - the water injection pump, 32 - the three - way valve; 33 - the first water injection pipeline, 331 - the first regulating valve, 332 - the first pressure gauge, 333 - the first pressure relief valve, 334 - the flow meter, 34 - the second water injection pipeline, 341 - the second regulating valve, 342 - the second pressure gauge, 343 - the second pressure relief valve. Detailed Embodiment

[0033] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments.

[0034] In the present utility model, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0035] Combined with Figures 1 to 6 As shown, the present utility model provides a double-end water blocking device for observing the water-conducting fissure zone in overlying strata. During the process of pushing it to the target section of the borehole, this double-end water blocking device can reduce the wear and damage of the borehole wall on the plugging capsule, so as to ensure the smooth progress of the subsequent observation process of the water-conducting fissure zone in overlying strata, and at the same time extend the service life of the plugging capsule.

[0036] As Figure 1 shown, the double-end water blocking device of the present utility model mainly includes structural components such as a first plugging capsule 11, a second plugging capsule 12, a drill pipe 13, a support mechanism 2, and a water injection mechanism 3. Among them, both the first plugging capsule 11 and the second plugging capsule 12 are made of rubber material, and after being injected with water, they can block the target section of the borehole to complete subsequent experimental observations. The support mechanism 2 is used to support and protect the first plugging capsule 11 and the second plugging capsule 12 to reduce the wear and damage of the borehole wall on the plugging capsule during the pushing process. The water injection mechanism 3 is used to inject water into the borehole, the first plugging capsule 11, and the second plugging capsule 12.

[0037] Combined with Figure 1 and Figure 2 shown, the first plugging capsule 11 and the second plugging capsule 12 are respectively arranged at the rear end and the front end of the drill pipe 13. A borehole water outlet 131 is provided at the position of the drill pipe 13 between the first plugging capsule 11 and the second plugging capsule 12. Through the borehole water outlet 131, water can be injected into the closed area surrounded by the first plugging capsule 11 and the second plugging capsule 12 to complete the observation and record of the water leakage volume in the subsequent test hole section.

[0038] Combined with Figure 1 and Figure 5 shown, a borehole water injection pipe 14 and a capsule water injection pipe 15 are also arranged inside the drill pipe 13. Among them, the water outlet of the borehole water injection pipe 14 is communicated with the borehole water outlet 131, and the water outlets of the capsule water injection pipe 15 are respectively communicated with the interiors of the first plugging capsule 11 and the second plugging capsule 12. Combined with Figure 5As shown, the water source of the borehole water injection pipe 14 injects water into the borehole through the borehole water outlet 131, and the water source of the capsule water injection pipe 15 injects water into the first plugging capsule 11 and the second plugging capsule 12 through the water outlet, and after the water injection and expansion, the plugging of the test hole section is completed.

[0039] As Figure 1 shown, the water inlet of the borehole water injection pipe 14 and the water inlet of the capsule water injection pipe 15 are both connected to the water injection mechanism 3, and the water injection mechanism 3 can inject water into the borehole water injection pipe 14 and the capsule water injection pipe 15.

[0040] Combined with Figure 6 shown, the water injection mechanism 3 includes an underground water supply pipeline 30, a water injection pump 31, a first water injection pipeline 33 and a second water injection pipeline 34. Among them, the water inlet of the water injection pump 31 is communicated with the underground water supply pipeline 30, and the water outlet of the water injection pump 31 is communicated with the water inlet of the first water injection pipeline 33 and the water inlet of the second water injection pipeline 34 through a three-way valve 32. A first regulating valve 331, a first pressure gauge 332, a flow meter 334 and a first pressure relief valve 333 are arranged on the first water injection pipeline 33, and the water outlet of the first water injection pipeline 33 is communicated with the water inlet of the borehole water injection pipe 14. A second regulating valve 341, a second pressure gauge 342 and a second pressure relief valve 343 are arranged on the second water injection pipeline 34. The water outlet of the second water injection pipeline 34 is communicated with the water inlet of the capsule water injection pipe 15.

[0041] Combined with Figures 1 to 4 shown, a support mechanism 2 is further arranged on the drill pipe 13. The support mechanism 2 can extend radially outward along the drill pipe 13 to support and protect the first plugging capsule 11 and the second plugging capsule 12, so as to reduce the wear and damage of the plugging capsule by the borehole wall during the pushing process.

[0042] Combined with Figure 3 and Figure 4 shown, the support mechanism 2 mainly includes structural components such as a telescopic rod 21, a collar 22, a first connecting rod 23, a second connecting rod 24 and a support plate 25. The cylinder end of the telescopic rod 21 is connected to the drill pipe 13, and the telescopic end of the telescopic rod 21 is connected to the collar 22. The collar 22 is sleeved on the drill pipe 13, and the telescopic end of the telescopic rod 21 expands and contracts relative to the cylinder end to drive the collar 22 to move along the axial direction of the drill pipe 13. One end of the first connecting rod 23 is hinged to the side wall of the collar 22, and the other end of the first connecting rod 23 is hinged to the middle position of the second connecting rod 24. One end of the second connecting rod 24 is hinged to the side wall of the drill pipe 13, and the other end of the second connecting rod 24 is connected to the support plate 25. When the telescopic rod 21 drives the telescopic end to extend, it can push the collar 22 closer to the second plugging capsule 12, and at the same time, the first connecting rod 23 and the second connecting rod 24 can make the support plate 25 closer to the borehole wall. In this embodiment, the telescopic rod 21 can be selected as a pneumatic push rod to drive the collar 22 to move along the axial direction of the drill pipe 13.

[0043] Combined with Figure 3 and Figure 4 As shown, the first connecting rod 23, the second connecting rod 24 and the support plate 25 form a set of support components. There are multiple sets of support components, and the multiple sets of support components are symmetrically arranged about the axial direction of the drill pipe 13.

[0044] Combined with Figure 3 and Figure 4 As shown, the outer contour of the support plate 25 is arc-shaped, and the radian of the support plate 25 is adapted to the inner wall of the drilling hole, which is convenient for pushing the double-end water blocking device to the test hole section. At the same time, the support plate 25 is a detachable structure, and it can be replaced in time when the support plate 25 has problems and cannot achieve support.

[0045] Combined with Figure 1 , Figure 2 and Figure 5 As shown, a drill bit 16 is provided at the front end of the drill pipe 13 with respect to the second plugging capsule 12. Since the drill bit 16 is provided at the very front end of the entire double-end water blocking device, when the double-end water blocking device is pushed towards the test hole section, the drill bit can first clean the coal dust or crushed stones falling in the drilling hole, reduce the resistance of the double-end water blocking device to move forward, and at the same time can also reduce the damage of sharp foreign objects such as crushed stones to the plugging capsule during the moving process, and relatively extend the service life of the plugging capsule. At the same time, a lengthening rod (not shown in the figure) is connected to the rear end of the drill pipe 13, and the double-end water blocking device can be pushed to the test hole section by cooperating with the pushing device. The operation process of the present utility model is as follows:

[0046] First, the telescopic rod 21 pushes the collar 22 so that the support plate 25 abuts against the hole wall of the drilling hole to complete the support for the first plugging capsule 11 and the second plugging capsule 12, and then the double-end water blocking device is pushed to the test hole section; water is injected into the first plugging capsule 11 and the second plugging capsule 12 through the water injection mechanism 3, and the water pressure is maintained to keep the plugging capsule in an expanded state; water is injected into the drilling hole plugging area through the water injection mechanism 3, and the cumulative water injection volume is recorded by the flow meter 334, and the water injection pressure is monitored by the first pressure gauge 332. When the water pressure rises to 3-5 times the initial water injection pressure, stop injecting water, and take the recorded cumulative water injection volume as the leakage volume to measure the water volume injected into the hole section per unit time and leaked through the hole wall cracks; open the first pressure relief valve 333 and the second pressure relief valve 343 for pressure relief. After the water in the first plugging capsule 11 and the second plugging capsule 12 flows out, drive the support mechanism 2 again to support the device, and then move the double-end water blocking device inward along the drilling hole to the next test hole section or withdraw it from the drilling hole.

[0047] The present utility model provides a double-end water blocking device for observing the water-conducting fissure zone in overlying strata. The double-end water blocking device realizes double-end blocking of the target section of the borehole by injecting water into the first plugging capsule 11 and the second plugging capsule 12 through the water injection mechanism 3. At the same time, the water injection mechanism 3 is used to inject water into the borehole plugging area through the borehole water outlet 131, and instruments such as pressure gauges and flow meters are used to observe and record the water injection leakage volume of the test hole section, so as to quantitatively judge the degree of fissure development and further master the maximum development height of the water-conducting fissure zone. The double-end water blocking device of the present utility model is provided with a support mechanism 2 to support and protect the first plugging capsule 11 and the second plugging capsule 12, reducing the wear and damage of the plugging capsule by the borehole wall during the pushing process of the double-end water blocking device, so as to ensure the smooth progress of the subsequent observation process of the water-conducting fissure zone in overlying strata, and at the same time extend the service life of the plugging capsule and save economic costs to a certain extent. The double-end water blocking device of the present utility model has a simple structure, is convenient and practical, is more convenient for later maintenance and replacement of accessories, and is low in cost and easy to promote.

[0048] Certainly, the above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made by using the content of the specification and drawings of the present utility model under the inventive concept of the present utility model, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present utility model and should be protected by the present utility model.

Claims

1. A double-end water blocking device for observing water-conducting fracture zones in overburden rocks, characterized in that: It includes a drill pipe, a first plugging capsule and a second plugging capsule; The rear end and the front end of the drill rod are respectively provided with a first plugging capsule and a second plugging capsule, wherein the drill rod is provided with a drill bit at the front end of the second plugging capsule, and the drill rod is provided with a drilling water outlet at a position between the first plugging capsule and the second plugging capsule; The drill rod is also provided with a borehole water injection pipe and a capsule water injection pipe, wherein the water outlet of the borehole water injection pipe is connected to the borehole water outlet, and the water outlet of the capsule water injection pipe is respectively connected to the interior of the first blocking capsule and the second blocking capsule; The water inlet of the borehole water injection pipe and the water inlet of the capsule water injection pipe are both connected to a water injection mechanism, and the water injection mechanism can inject water into the borehole water injection pipe and the capsule water injection pipe; The drill rod is also provided with a support mechanism, and the support mechanism can extend outward along the radial direction of the drill rod; The support mechanism comprises a telescopic rod, a first connecting rod, a second connecting rod and a collar; the cylinder end of the telescopic rod is connected to the drill rod, the telescopic end of the telescopic rod is connected to the collar, and the collar is sleeved on the drill rod; One end of the first connecting rod is hinged to the collar, one end of the second connecting rod is hinged to the drill rod, and the other end of the first connecting rod is hinged to the second connecting rod.

2. A double-end water plugging device for observing water-conducting fracture zones in overburden rocks according to claim 1, characterized in that: The support mechanism also includes a support plate; One end of the second connecting rod away from the drill rod is connected to the support plate.

3. A double-end water plugging device for observing water-conducting fracture zones in overburden rocks according to claim 2, characterized in that: The first connecting rod, the second connecting rod and the support plate form a set of support components, and the support components are provided in multiple sets, and the multiple sets of support components are symmetrically arranged with respect to the axial direction of the drill pipe.

4. A double-end water plugging device for observing water-conducting fracture zones in overburden rocks according to claim 2, characterized in that: The outer contour of the support plate is arc-shaped.

5. A double-end water plugging device for observing water-conducting fracture zones in overburden rocks according to claim 1, characterized in that: The water injection mechanism comprises an underground water supply pipeline, a water injection pump, a first water injection pipeline and a second water injection pipeline, wherein the water inlet of the water injection pump is connected to the underground water supply pipeline, and the water outlet of the water injection pump is connected to the water inlet of the first water injection pipeline and the water inlet of the second water injection pipeline through a three-way valve; The first water injection pipeline is provided with a first regulating valve, a first pressure gauge, a flow meter and a first pressure relief valve, and the water outlet of the first water injection pipeline is connected to the water inlet of the borehole water injection pipe; The second water injection pipeline is provided with a second regulating valve, a second pressure gauge and a second pressure relief valve; the water outlet of the second water injection pipeline is connected to the water inlet of the capsule water injection pipe.

6. A double-end water plugging device for observing water-conducting fracture zones in overburden rocks according to claim 1, characterized in that: The first blocking capsule and the second blocking capsule are both made of rubber material.

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