A chemical energy transient gas expansion weak explosion rock mass fracturing device

Abstract

The present invention relates to a chemical energy transient gas expansion weak explosion rock fracturing device, comprising: a tube body, a plug is arranged at the top of the tube body, and a pressure relief sheet and a pressure relief head are arranged at the bottom of the tube body; an elastic sac is arranged at the bottom of the tube body, the elastic sac covers the bottom of the tube body and the pressure relief head, the elastic sac is provided with a plurality of extrusion cavities along its side, the extrusion cavities are filled with filling glue, and the extrusion cavity is provided with a plurality of through holes on its outer surface; a first inflation agent is filled in the space above the pressure relief sheet in the tube body; a second inflation agent is inflated to inflate the elastic sac after being excited; a first exciter passes through the plug and extends into the interior of the tube body, and is used to excite the first inflation agent; a second exciter is used to excite the second inflation agent, and after the second inflation agent is excited, the elastic sac expands and fits to the corresponding bottom of the borehole, extruding and releasing the filling glue in the extrusion cavity.

Description

Technical Field

[0001] The invention relates to the field of rock mass fracturing devices, in particular to a chemical energy transient gas expansion weak explosion rock mass fracturing device. Background Art

[0002] In mining development, water conservancy and hydropower engineering construction, urban tunnel construction and other projects that widely involve rock tunnel excavation operations, relying on a fracturing device to blast the rock layer is a common technical means. The fracturing device generally includes a cylinder, a reactant, and an exciter, wherein the filler is filled in the cylinder. The exciter can generate high temperature in the cylinder, thereby detonating the reactant, so that the gas generated by the reactant breaks through the pressure relief plate at the bottom of the cylinder and generates a shock wave. The fracturing device includes chemical energy transient gas expansion weak explosion technology, which uses chemicals to generate a large amount of gas after heating to generate shock waves, and has the characteristics of high energy.

[0003] When using the gas expansion weak explosion rock fracturing device, it is necessary to first drill a hole in the rock mass, and then put the gas expansion weak explosion rock fracturing device into the hole. Due to the complex structure inside the rock mass, cracks and faults are likely to appear at the bottom of the hole. In this state, the gas generated by the gas expansion weak explosion rock fracturing device is easy to diffuse through the cracks or faults to areas outside the pre-fractured position, thereby greatly reducing the fracturing effect.

[0004] The purpose of the present invention is to design a chemical energy transient gas expansion weak explosion rock mass fracturing device in view of the above-mentioned problems existing in the prior art. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the present invention provides a chemical energy transient gas expansion weak explosion rock fracturing device, which can effectively solve at least one problem existing in the above-mentioned prior art.

[0006] The technical solution of the present invention is:

[0007] A chemical energy transient gas expansion weak explosion rock mass fracturing device, comprising:

[0008] A tube body, wherein a plug is provided at the top end of the tube body, and a pressure relief sheet and a pressure relief head are provided at the bottom end of the tube body;

[0009] An elastic sac is arranged at the bottom of the tube body, the elastic sac covers the bottom of the tube body and the pressure relief head, the elastic sac is provided with a plurality of extrusion cavities along its side, the extrusion cavities are filled with filling glue, and the extrusion cavities are provided with a plurality of through holes on their outer surface;

[0010] A first inflatable agent is filled in the space above the pressure relief sheet in the tube;

[0011] a second inflatable agent, which inflates the elastic bladder after being stimulated;

[0012] A first activator, passing through the plug and extending into the interior of the tube body, for activating the first inflatable agent;

[0013] The second stimulator is used to stimulate the second inflatable agent. After the second inflatable agent is stimulated, the elastic sac expands and fits to the bottom of the corresponding drill hole, squeezing and releasing the filling glue in the extrusion cavity.

[0014] Furthermore, a mounting ring is provided on the top of the elastic sac, the mounting ring is fixedly connected to the bottom of the tube body, the second inflating agent is provided in the mounting ring, the second activator passes through the mounting ring and extends into the interior of the mounting ring, and a plurality of ventilation holes are provided at the bottom of the mounting ring.

[0015] Furthermore, a second inflating agent accommodating chamber is formed in the mounting ring by two baffles, and the second inflating agent is filled in the second inflating agent accommodating chamber.

[0016] Furthermore, the elastic bladder is a double-layer hollow structure.

[0017] Furthermore, the extrusion cavity is arranged on the inner wall of the outer layer of the elastic bladder, and the vent hole is connected to the elastic bladder.

[0018] Furthermore, the cross section of the extrusion cavity is a structure that is narrow outside and wide inside.

[0019] Furthermore, the extrusion chambers extend along the axial direction of the tube body, and the extrusion chambers are arranged at equal angular intervals.

[0020] Further, the method of use is:

[0021] First, the second inflatable agent is excited by the second exciter, so that the filling glue is filled to the bottom of the drill hole;

[0022] After the filling glue is shaped, the first inflating agent is stimulated by the first stimulator.

[0023] Therefore, the present invention provides the following effects and / or advantages:

[0024] The present application covers the bottom of the tube body and the pressure relief head with an elastic bladder, which can be tightly attached to the bottom of the tube body and the outer surface of the pressure relief head when not inflated, without affecting the tube body entering the borehole. After being inflated, the elastic bladder can expand and fit to the inner wall of the borehole, while the filling glue in the extrusion cavity is squeezed and released to the outer wall of the elastic bladder and penetrates into the cracks, faults, etc. of the borehole, preventing the gas in the tube body from leaking to other areas through the cracks, faults, etc. of the borehole, thereby effectively ensuring the fracturing range and performance of the fracturist.

[0025] The present application provides an extrusion cavity in the elastic bladder body. After the elastic bladder body is inflated, the internal air pressure releases the filling glue in the extrusion cavity, thereby squeezing the filling glue onto the inner wall of the drill hole.

[0026] The present application can accommodate a small amount of second inflatable agent by setting a mounting ring, and the second inflatable agent is stimulated by a second stimulator. The mounting ring is connected to an elastic bladder, so that the gas generated by the second inflatable agent is transferred to the elastic bladder to expand it.

[0027] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0028] It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0030] Figure 2 It is a schematic diagram of the structural explosion of an embodiment of the present invention.

[0031] Figure 3 It is a cross-sectional view of the elastic bladder.

[0032] Figure 4 A structural perspective view of the mounting ring.

[0033] Figure 5 It is a cross-sectional view of an embodiment of the present invention.

[0034] Figure 6 This is a schematic diagram of the state after the elastic bladder is expanded and filled with glue to fill the cracks and faults.

[0035] Description of reference numerals:

[0036] Tube body 1, plug 2, pressure relief sheet 3, pressure relief head 4, elastic capsule 5, extrusion cavity 501, through hole 502, first inflating agent 6, second inflating agent 7, first activator 8, second activator 9, mounting ring 10, vent hole 101. DETAILED DESCRIPTION

[0037] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the embodiments in conjunction with the accompanying drawings:

[0038] refer to Figure 1-5 , a chemical energy transient gas expansion weak explosion rock mass fracturing device, comprising:

[0039] A tube body 1, wherein a plug 2 is disposed at the top end of the tube body 1, and a pressure relief sheet 3 and a pressure relief head 4 are disposed at the bottom end of the tube body 1;

[0040] In this embodiment, the structure of the pipe body 1 is the existing technology, wherein the plug 2 and the pressure relief head 4 can be connected to the two ends of the pipe body 1 respectively by threaded connection. At the same time, the pressure relief head 4 is provided with a plurality of air holes on its side wall, and the direction of the air holes is consistent with the radial direction of the pipe body 1, so that the gas generated inside the pipe body 1 is discharged laterally through the air holes, thereby increasing the pressure inside the borehole and causing the rock mass to break.

[0041] An elastic sac 5 is arranged at the bottom of the tube body 1, and covers the bottom of the tube body 1 and the pressure relief head 4. The elastic sac 5 is provided with a plurality of extrusion cavities 501 along its side, and the extrusion cavities 501 are filled with filling glue, and the extrusion cavities 501 are provided with a plurality of through holes 502 on their outer surface;

[0042] In this embodiment, when the elastic bladder 5 is not inflated, it covers the bottom of the tube body 1 and the periphery of the pressure relief head 4, thereby facilitating the tube body 1 to be placed in the drilled hole; when the elastic bladder 5 is inflated, it expands toward the bottom of the tube body 1 and the periphery of the pressure relief head 4, so that the outer side of the elastic bladder 5 fits to the bottom of the drilled hole. Under the pressure inside the elastic bladder 5, the extrusion cavity 501 is squeezed, so that the filling glue can be discharged outward from the through hole 502, so that the filling glue is spread on the bottom of the drilled hole, thereby filling the cracks, faults and other positions at the bottom of the drilled hole, so that a dense structure is formed at the bottom of the drilled hole.

[0043] A first inflatable agent 6 is filled in the space above the pressure relief sheet 3 in the tube body 1;

[0044] In this embodiment, the first inflating agent 6 is used to generate violent gas expansion to fracture the interior of the rock mass.

[0045] The second inflatable agent 7 inflates the elastic bladder 5 after being stimulated;

[0046] In this embodiment, the second inflating agent 7 is used to generate a certain amount of gas, thereby increasing the pressure in the elastic capsule 5, causing the elastic capsule 5 to expand, and the extrusion cavity 501 is squeezed by the internal pressure. In this embodiment, only a small amount of the second inflating agent 7 is required, for example, 2-5g, which can spontaneously decompose and generate a certain amount of gas after being heated and excited, so as to expand the elastic capsule 5, but will not generate excessive gas to break the elastic capsule 5. The specific setting can be made with reference to the diameter of the drilled hole.

[0047] A first activator 8, passing through the plug 2 and extending into the interior of the tube body 1, for activating the first inflatable agent 6;

[0048] The second stimulator 9 is used to stimulate the second inflatable agent 7 . After the second inflatable agent 7 is stimulated, the elastic capsule 5 expands and fits to the bottom of the corresponding drill hole, squeezing and releasing the filling glue in the squeezing cavity 501 .

[0049] In this embodiment, the igniter can be a heating wire or a fuse, etc. The two ends of the heating wire are connected to an external power source through wires passing through the plug 2. When the power source works on the heating wire, the heating wire heats up and can detonate the first inflatable agent 6 in the tube body 1, causing the first inflatable agent 6 to absorb heat or self-heat to generate violent gas.

[0050] Furthermore, a mounting ring 10 is provided on the top of the elastic sac 5, and the mounting ring 10 is fixedly connected to the bottom of the tube body 1, the second inflating agent 7 is arranged in the mounting ring 10, the second activator 9 passes through the mounting ring 10 and extends into the interior of the mounting ring 10, and a plurality of ventilation holes 101 are provided at the bottom of the mounting ring 10.

[0051] Furthermore, the installation ring 10 is surrounded by two baffles to form a second inflating agent accommodating chamber, and the second inflating agent 7 is filled in the second inflating agent accommodating chamber.

[0052] In this embodiment, the mounting ring 10 is fixedly connected to the outer wall of the tube body 1, thereby playing the role of fixing the elastic capsule 5, and the baffle surrounds a part of the space inside the mounting ring 10 to form a second inflation agent accommodating chamber, preventing the second inflation agent 7 from moving arbitrarily in the mounting ring 10 and being unable to be heated by the second exciter 9. After the second inflation agent 7 is excited, the generated gas breaks through the baffle to fill the interior of the mounting ring 10 and fills the elastic capsule 5 through the vent 101. The mounting ring 10 of this embodiment does not have a vent 101 at the position corresponding to the second inflation agent 7, so that the gas generated by the second inflation agent 7 can be distributed in the mounting ring 10.

[0053] Furthermore, the elastic bladder 5 is a double-layer hollow structure.

[0054] In this embodiment, the outer layer of the elastic bladder 5 is connected to the outer ring of the mounting ring 10, and the inner layer of the elastic bladder 5 is connected to the inner ring of the mounting ring 10, thereby forming a double-layer hollow structure. When the elastic bladder 5 is not inflated, a certain space is naturally formed inside the elastic bladder 5, providing the extrusion cavity 501 with a basic structure that is not subjected to force extrusion.

[0055] Furthermore, the extrusion cavity 501 is disposed on the inner wall of the outer layer of the elastic bladder 5 , and the vent hole 101 is connected to the elastic bladder 5 .

[0056] Furthermore, the cross section of the extrusion cavity 501 is a structure that is narrow outside and wide inside.

[0057] Furthermore, the extrusion chambers 501 extend along the axial direction of the tube body 1 , and the extrusion chambers 501 are arranged at equal angular intervals.

[0058] In this embodiment, under this structure, on the one hand, the extrusion cavity 501 can accommodate more filling glue, and on the other hand, after the elastic bladder 5 expands, the pressure inside it can better act on the wide surface inside the extrusion cavity 501. At the same time, after the elastic bladder 5 expands, the outer side surface of the extrusion cavity 501 is stretched, thereby further reducing the width of the extrusion cavity 501, and finally the filling glue can be better squeezed out, so that the filling glue can penetrate into the cracks, faults and other spaces in the drill hole.

[0059] Furthermore, the method of using the gas expansion weak explosion rock mass fracturing device is as follows:

[0060] First, the second inflatable agent 7 is excited by the second exciter 9, so that the filling glue is filled to the bottom of the drill hole;

[0061] After the filling glue is set, the first inflating agent 6 is stimulated by the first stimulator 8 .

[0062] In the present method of use, the second inflating agent 7 is firstly excited by the second inflating agent 9, so that the gas generated by the second inflating agent 7 fills the elastic capsule 5 to expand it. At this time, the outer wall of the elastic capsule 5 is attached to the bottom of the drill hole. Figure 6 As shown, Figure 6 The shaded part in the figure represents the filling glue. After the filling glue is dried and fixed, for example, 15 minutes, the filling glue fills the space in the cracks and faults, and the elastic capsule 5 expands and supports the inner wall of the borehole, and then the first exciter 8 detonates the first inflation agent 6. At this time, the strong airflow generated by the first inflation agent 6 breaks through the pressure relief sheet 3 and directly destroys the elastic capsule 5 through the pressure relief head 4. The strong airflow further reaches the bottom of the borehole tightly sealed by the filling glue, and cracks the rock mass.

[0063] It should be noted that in the claims, any reference signs placed between brackets shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claim. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention may be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

[0064] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

Claims

1. A chemical energy transient gas expansion weak explosion rock mass fracturing device, characterized by: include: A tube body (1), wherein a plug (2) is provided at the top end of the tube body (1), and a pressure relief sheet (3) and a pressure relief head (4) are provided at the bottom end of the tube body (1); An elastic sac (5) is arranged at the bottom of the tube (1), the elastic sac (5) covers the bottom of the tube (1) and the pressure relief head (4), the elastic sac (5) is provided with a plurality of extrusion cavities (501) along its side surface, the extrusion cavities (501) are filled with filling glue, and the extrusion cavities (501) are provided with a plurality of through holes (502) on their outer surface; A first inflatable agent (6) is filled in the space above the pressure relief sheet (3) in the tube body (1); The second inflatable agent (7) inflates the elastic bladder (5) after being stimulated; A first activator (8), passing through the plug (2) and extending into the interior of the tube body (1), for activating the first inflatable agent (6); The second stimulator (9) is used to stimulate the second inflatable agent (7); after the second inflatable agent (7) is stimulated, the elastic capsule (5) expands and fits to the bottom of the corresponding drill hole, squeezing and releasing the filling glue in the squeezing cavity (501).

2. The chemical energy transient gas expansion weak explosion rock fracturing device according to claim 1 is characterized by: A mounting ring (10) is provided at the top of the elastic sac (5), the mounting ring (10) is fixedly connected to the bottom of the tube (1), the second inflatable agent (7) is arranged in the mounting ring (10), the second activator (9) passes through the mounting ring (10) and extends into the interior of the mounting ring (10), and a plurality of ventilation holes (101) are provided at the bottom of the mounting ring (10).

3. The chemical energy transient gas expansion weak explosion rock fracturing device according to claim 2 is characterized by: A second inflating agent accommodating chamber is formed in the mounting ring (10) by means of two baffles, and the second inflating agent (7) is filled in the second inflating agent accommodating chamber.

4. The chemical energy transient gas expansion weak explosion rock fracturing device according to claim 2 is characterized by: The elastic bladder (5) is a double-layer hollow structure.

5. The chemical energy transient gas expansion weak explosion rock fracturing device according to claim 4 is characterized by: The extrusion cavity (501) is arranged on the inner wall of the outer layer of the elastic sac (5), and the vent hole (101) is connected to the inside of the elastic sac (5).

6. The chemical energy transient gas expansion weak explosion rock fracturing device according to claim 1, characterized in that: The cross section of the extrusion cavity (501) is a structure that is narrow on the outside and wide on the inside.

7. The chemical energy transient gas expansion weak explosion rock fracturing device according to claim 1, characterized in that: The extrusion chambers (501) extend along the axial direction of the tube body (1), and the extrusion chambers (501) are arranged at equal angular intervals.

8. The chemical energy transient gas expansion weak explosion rock fracturing device according to claim 1, characterized in that: How to use: First, the second inflatable agent (7) is excited by the second exciter (9) so that the filling glue is filled to the bottom of the drill hole; After the filling glue is shaped, the first inflating agent (6) is stimulated by the first stimulator (8).

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