CN104567568A - Blast hole plugging device and method - Google Patents
Blast hole plugging device and method Download PDFInfo
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- CN104567568A CN104567568A CN201410799965.1A CN201410799965A CN104567568A CN 104567568 A CN104567568 A CN 104567568A CN 201410799965 A CN201410799965 A CN 201410799965A CN 104567568 A CN104567568 A CN 104567568A
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Abstract
The invention discloses a blast hole plugging device and method. The blast hole plugging device comprises a first plugging part and a second plugging part, wherein the second plugging part is near a blast hole opening and is fixed with the inner wall of a blast hole, the circumferential profile of the first plugging part and the circumferential profile of the second plugging part are matched with the hole diameter of the blast hole, the first plugging part is provided with a first surface forming an angle with the axial line of the blast hole, the second plugging part is provided with a second surface forming an angle with the axial line of the blast hole, and the first plugging part and the second plugging part mutually form surface contact through the first surface and the second surface. In the blasting process, the first plugging part moves along the second surface due to the pressure of detonation gas in the blast hole, i.e., the first plugging part and the second plugging part generate relative malposition, the first plugging part exerts the positive pressure on the inner wall of the blast hole, and the pressure of the detonation gas is greater, so the generated friction is also greater, and the moving of the first plugging part and the second plugging part towards the outer part of the blast hole is retarded through the friction force, so that the acting time of the detonation gas is increased, and a good blasting effect is achieved.
Description
Technical field
The present invention relates to deep hole blasting field, particularly, relate to a kind of big gun hole plugging device and method.
Background technology
Deep hole blasting technology is often applied to colliery, such as, all can use deep hole blasting under the situation such as concentrating in the relieving shot of the ultralong deep hole in the top board overhead caving, tunnel in colliery or tunnel for Stress Release relieve stresses.And the quality of big gun hole plugging effect is the key point of deep hole blasting, particularly especially obvious for the special Deephole pre-splitting blasting more than more than 30 meters, this is because dose is larger in special Deephole pre-splitting blasting big gun hole more than more than 30 meters, only have and intact shutoff has been carried out to big gun hole, the action time of detonation gas could be increased, thus obtain good Pre-splitting Blasting Effect.
Traditional, usual use stemming shutoff big gun hole, but because stemming is only rely on the frictional force of itself and big gun hole wall to carry out shutoff detonation gas, in blasting process, stemming is compacted under the effect of high pressure detonation gas, then under the effect of detonation gas immense pressure, obtain kinetic energy, thus move to the direction, aperture in big gun hole.But inadequate only by the frictional force in stemming shutoff big gun hole, stemming can be produced by boasting by detonation gas, and the plugging action time is shorter, and demolition effect is poor.For this reason, also have employed in prior art, by cement mortar, shutoff is carried out to big gun hole, such as, in big gun hole, pour into cement mortar, after it solidifies, carry out blast operations.But the setting time due to cement mortar is not easy to grasp, above-mentioned shutoff mode easily occurs that cement mortar is that blast operations is just carried out when not solidifying in surface solidification and inside, and also do not play good plugging effect, demolition effect is as one wishes not to the utmost.
Summary of the invention
The object of this invention is to provide a kind of big gun hole plugging device and method, to overcome in prior art owing to failing action time in abundant shutoff big gun hole and the detonation gas caused short, poor problem of demolition effect.
To achieve these goals, the invention provides a kind of big gun hole plugging device, the second closure part that this big gun hole plugging device comprises the first closure part and fixes near big gun aperture and with the inwall in big gun hole, the circumferential profile of described first closure part and described second closure part and the aperture in described big gun hole match, described first closure part has the angled first surface of axis with described big gun hole, described second closure part has the angled second surface of axis with described big gun hole, described first closure part contacts with second surface forming surface each other by described first surface with described second closure part.
Preferably, the correspondence position of described first closure part and described second closure part is provided with for the through hole through detonator payment to a porter, described through hole is arranged along the axial direction in described big gun hole.
Preferably, the end face being provided with the position of described through hole of described first closure part is plane, the side of described end face is connected with the perisporium of described first closure part, opposite side is connected with described first surface, described end face is provided with fixed part, described fixed part is fixed with the stay cord for locating described first closure part.
Preferably, the angle of the angle of the axis in described first surface and described big gun hole and the axis in described second surface and described big gun hole is 18 °-30 °.
Preferably, the inwall in described second closure part and described big gun hole is fixed by binding agent, and the side of described second closure part is provided with the first groove for placing described binding agent.
Preferably, described first surface and described second surface are shiny surface.
Preferably, the one in described first surface and described second surface is provided with groove along the incline direction of described first surface or second surface, and another one is provided with for the track with described groove match.
Preferably, described first closure part and described second closure part are fixed.
Preferably, described first closure part and described second closure part are bolted.
Preferably, this big gun hole plugging device comprises the side opposing with described second closure part that be arranged at described first closure part and for the sealing of the inwall that seals described big gun hole and described first closure part.
Preferably, the end face of the side opposing with described second closure part of described first closure part is plane, and is provided with the second groove on this plane.
Preferably, the side deviating from described first closure part of described second closure part is provided with for facilitating tamper described big gun hole plugging device to be pushed to the 3rd groove in described big gun hole.
Preferably, the material of described first closure part and described second closure part is concrete or mortar material, or described first closure part and/or described second closure part have metal shell, and the inside of its metal shell is cast with concrete or mortar.
The present invention also provides a kind of big gun hole method for blocking, and described method for blocking comprises the following steps:
S1: send into the assigned address in described first closure part and the second closure part to described big gun hole and the first surface of described first closure part is contacted with the second surface forming surface of described second closure part;
S2: the inwall in fixing described second closure part to described big gun hole.
Preferably, the end face being provided with the position of described through hole of described first closure part is plane, the side of described end face is connected with the perisporium of described first closure part, opposite side is connected with described first surface, described end face is provided with fixed part, described fixed part is fixed with the stay cord for locating described first closure part; Described method for blocking also comprises: before described step S1, first on described fixed part, fixes described stay cord, then holds described stay cord and sent in described big gun hole in described first closure part and the second closure part.
Preferably, before described method for blocking is also included in described step S1, described first closure part and the second closure part are fixed.
Pass through technique scheme, in blasting process, first closure part is owing to being subject to the pressure of detonation gas in big gun hole, thus move along second surface, namely there is the relative changing of the relative positions with the second closure part in the first closure part, makes the first closure part apply normal pressure to the inwall in big gun hole, thus produce larger frictional force, it is mobile to outside, big gun hole that this frictional force slow down the first closure part and the second closure part, thus add the action time of detonation gas, reaches good demolition effect.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the scheme of installation (the 3rd groove of not shown second closure part) of the big gun hole plugging device that the specific embodiment of the present invention provides.
Fig. 2 is the structural representation after big gun hole plugging device in Fig. 1 is subject to quick-fried raw pressure.
Fig. 3 is the stressed schematic diagram of the big gun hole plugging device shown in Fig. 2.
Fig. 4 is the schematic diagram of the second closure part of the big gun hole plugging device shown in Fig. 1.
Fig. 5 is the schematic diagram of the first closure part of the big gun hole plugging device that another embodiment of the present invention provides.
Fig. 6 is the schematic diagram of second closure part corresponding with the first closure part shown in Fig. 5.
Description of reference numerals
11: the first closure parts; 12: the second closure parts; 12a: the first groove;
12b: the three groove; 13: through hole; 20: big gun hole.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality such as " upper and lower, left and right " of use typically refers to reference to upper and lower, left and right shown in the drawings; " inside and outside " refers to profile inside and outside relative to each parts itself.
According to an aspect of the present invention, the invention provides a kind of big gun hole plugging device, the second closure part 12 that this big gun hole plugging device comprises the first closure part 11 and fixes near big gun aperture and with the inwall in big gun hole 20, first closure part 11 and the circumferential profile of the second closure part 12 and the aperture in big gun hole 20 match, first closure part 11 has first surface angled with the axis in big gun hole 20, second closure part 12 has second surface angled with the axis in big gun hole 20, and the first closure part 11 contacts with second surface forming surface each other by first surface with the second closure part 12.Wherein, preferably, the angle of the axis in the angle of the axis in first surface and big gun hole 20 and second surface and big gun hole 20 is 18 °-30 °, thus the first closure part 11 stressed when being conducive to explosion.
In blasting process, after the base charge of big gun hole, first by stemming shutoff big gun hole 20, then described big gun hole plugging device to be sent between stemming and big gun aperture (as shown in Figure 1, stemming is not shown), when producing a large amount of detonation gases after the explosive initiation in big gun hole 20, first closure part 11 is owing to being subject to the pressure of detonation gas in big gun hole, thus move (as shown in Figure 2) along the second surface of the second closure part 12, that is, now there is the relative changing of the relative positions with the second closure part 12 in the first closure part 11.As the stressed schematic diagram that Fig. 3 is the first closure part 11 in blasting process, detonation gas can be analyzed to the sliding force P ' along second surface to the first closure part 11 applied pressure P, this sliding force P ' (P '=PSin θ) makes the first closure part 11 move and the inwall in jam-packed big gun hole 20 along second surface, thus make the inwall in first 11 pairs of big gun holes 20, closure part apply normal pressure N, and frictional force F=N μ=P ' Cos θ=PSin θ Cos θ=0.5PSin (2 θ)=0.5PSin (2 θ) μ of the inwall in the first closure part 11 and big gun hole 20 (wherein, μ is coefficient of friction, θ is the complementary angle of the angle of the axis in first surface or second surface and big gun hole 20), because detonation gas pressure P is larger, therefore the frictional force F of the inwall in the first closure part 11 and big gun hole 20 is also larger, it is mobile to outside, big gun hole 20 that this frictional force F slow down the first closure part 11 and the second closure part 12, thus add the action time of detonation gas, reach good demolition effect.
As shown in Figure 5 and Figure 6, in order to prevent breaking detonator payment to a porter, the correspondence position of the first closure part 11 and the second closure part 12 is provided with for the through hole 13 through detonator payment to a porter, and through hole 13 is arranged along the axial direction in big gun hole 20.Preferably, the diameter of through hole 13 is 8mm-12mm.In addition, the end face being provided with the position of through hole 13 of the first closure part 11 is plane, the side of this end face is connected with the perisporium of the first closure part 11, opposite side is connected with first surface, described end face is provided with fixed part (such as, becket etc.), fixed part is fixed with the stay cord for locating the first closure part 11.Be understandable that, the length of described stay cord at least will more than the length of the second closure part 12.It should be noted that, why the end face being provided with the position of through hole 13 of the first closure part 11 is set to plane, that conveniently fixed part is set on the one hand, in order to avoid damaging the first closure part 11 on the other hand, such as, if the end being provided with the position of through hole 13 of the first closure part 11 is set to pointed, so easy damage first closure part 11.
Wherein, second closure part 12 can be fixed in several ways with the inwall in big gun hole 20, preferably, second closure part 12 is fixed by binding agent with the inwall in big gun hole 20, the side of the second closure part 12 is provided with the first groove 12a for placing binding agent, and the cross section (intercepting along the face perpendicular to big gun hole 20 axis) of this first groove 12a can be semicircle.Described binding agent can be cement roll, fast hardening concrete agent or resin explosive roll etc.
In order to make the first closure part 11 move with the inwall in jam-packed big gun hole 20 along second surface smoothly, preferably, first surface and second surface are shiny surface.Certainly, in order to ensure the direction of motion of the first closure part 11, one in first surface and second surface is provided with groove (such as, semi-circular recesses or triangular prismatic type groove) along the incline direction of first surface or second surface, and another one is provided with for the track with groove match.
In order to improve demolition effect, the first closure part 11 and the second closure part 12 can be fixed.Such as by adhesive tape or other things, the second surface of the first surface of the first closure part 11 and the second closure part 12 can be fixed lightly, when the first closure part 11 being sent into together with the second closure part 12 after in big gun hole 20, suddenly to the second closure part 12, the side that deviates from the first closure part 11 applies power (such as, by the tamper hereafter mentioned, the second closure part 12 can be exerted a force), thus make the first closure part 11 and the second relative changing of the relative positions in closure part 12, to make the inwall in the first jam-packed big gun hole, closure part 11 20.In addition, first closure part 11 and the second closure part 12 can also be bolted, like this, by tighting a bolt thus increasing pretightning force (frictional force that the country rock self friction angle that the frictional force of the inwall in first 11 pairs of big gun holes 20, closure part that pretightning force can produce according to side direction is greater than the inwall in big gun hole 20 produces is determined) to the first closure part 11 and the second closure part 12, to make the first closure part 11 and the second relative changing of the relative positions in closure part 12 in advance, thus make the inwall in the first jam-packed big gun hole, closure part 11 20, reach good plugging effect.
In addition, in order to improve plugging effect further, described big gun hole plugging device comprises the side opposing with the second closure part 12 that be arranged at the first closure part 11 and for the sealing of the inwall that seals big gun hole 20 and the first closure part 11, the detonation gas of generation can be stoped like this to outward leakage.Wherein, described sealing can be soft rubber etc.
Wherein, the end face of the side opposing with the second closure part 12 of the first closure part 11 is plane, and is provided with the second groove on this plane, thus increases the lifting surface area of the first closure part 11.
As shown in Figure 4, conveniently big gun hole plugging device is pushed in big gun hole 20 by tamper, can arrange the 3rd groove 12b in the side deviating from the first closure part 11 of the second closure part 12, and the diameter of the 3rd groove 12b can be 25mm-60mm.
In addition, preferably, the material of the first closure part 11 and the second closure part 12 is concrete or mortar material, or, first closure part 11 and/or the second closure part 12 have metal shell, the inside of its metal shell is cast with concrete or mortar, and, in order to ensure that the first closure part 11 and the second closure part 12 can be set to entity by the weight of the first closure part 11 and the second closure part 12.
According to another aspect of the present invention, the present invention also provides a kind of big gun hole method for blocking, and described method for blocking comprises the following steps: S1: sending into the first closure part 11 with the assigned address in the second 12 to big gun hole, closure part 20 makes the first surface of the first closure part 11 contact with the second surface forming surface of the second closure part 12; S2: the inwall fixing the second 12 to big gun hole, closure part 20.
By said method shutoff big gun hole 20, in blasting process, first closure part 11 is subject to the effect of the pressure of the detonation gas produced in blasting process, thus move along the second surface of the second closure part 12 and make the first closure part 11, with the second closure part 12, the relative changing of the relative positions occur, detonation gas can be analyzed to the sliding force P ' along second surface to the first closure part 11 applied pressure P, this sliding force P ' (P '=PSin θ) makes the first closure part 11 move and the inwall in jam-packed big gun hole 20 along second surface, thus make the inwall in first 11 pairs of big gun holes 20, closure part apply normal pressure N, and frictional force F=N μ=P ' Cos θ=PSin θ Cos θ=0.5PSin (2 θ)=0.5PSin (2 θ) μ of the inwall in the first closure part 11 and big gun hole 20 (wherein, μ is coefficient of friction, θ is the complementary angle of the angle of the axis in first surface or second surface and big gun hole 20), because detonation gas pressure P is larger, therefore the frictional force F of the inwall in the first closure part 11 and big gun hole 20 is also larger, it is mobile to outside, big gun hole 20 that this frictional force F slow down the first closure part, thus add the action time of detonation gas, reach good demolition effect.
Wherein, in order to locate the first closure part 11, change sentence to change, in order to the face making the first surface of the first closure part 11 and the second surface of the second closure part 12 keep good contacts, described method for blocking also comprises: before described step S1, first fixed pulling rope on fixed part, then holds stay cord and is sent in big gun hole 20 in the first closure part 11 and the second closure part 12.Certainly, in order to the face making the first surface of the first closure part 11 and the second surface of the second closure part 12 keep good contacts, can also realize by the following method, namely, before described method for blocking is also included in described step S1, the first closure part 11 and the second closure part 12 are fixed.
Below will be illustrated big gun hole provided by the invention method for blocking by specific embodiment, and it should be noted that, following examples are only used to describe the present invention in detail, and are not limitation of the present invention:
Embodiment 1
Big gun hole 20 is circular hole, its diameter is 89mm, accordingly, first closure part 11 and the second closure part 12 are cylindrical, its diameter is 75-80mm, (" big gun hole plugging device height " here refers to when the first closure part 11 contacts with second surface forming surface each other by first surface with the second closure part 12 described big gun hole plugging device height, the whole height of the first closure part 11 and the second closure part 12) be 60mm, the angle of the axis in the angle of the axis in first surface and big gun hole 20 and second surface and big gun hole 20 is 22 °, the diameter of described through hole 13 is 10mm, when the cross section of the first groove 12a of the second closure part 12 is semicircle, its diameter is 28mm etc.
When big gun hole 20 upwards (" upwards " here refers to the position in big gun aperture lower than the position bottom big gun hole) tilt and the angle of its axis and vertical direction between 0-90 ° time, the 3rd groove 12b of the second closure part 12 can be touched by tamper, thus shift described big gun hole plugging device onto assigned address, then compacted, finally the second closure part 12 is fixed to the inwall in big gun hole 20.
Embodiment 2
Big gun hole 20 is circular hole, its diameter is 89mm, accordingly, first closure part 11 and the second closure part 12 are cylindrical, its diameter is 75-80mm, (" big gun hole plugging device height " here refers to when the first closure part 11 contacts with second surface forming surface each other by first surface with the second closure part 12 described big gun hole plugging device height, the whole height of the first closure part 11 and the second closure part 12) be 60mm, the angle of the axis in the angle of the axis in first surface and big gun hole 20 and second surface and big gun hole 20 is 18 °, the diameter of described through hole 13 is 10mm, when the cross section of the first groove 12a of the second closure part 12 is semicircle, its diameter is 28mm etc.
When (" downwards " here refers to the position in big gun aperture higher than the position bottom big gun hole) tilts downwards in big gun hole 20, the mode that described big gun hole plugging device sends into big gun hole 20 is divided into two kinds of situations: 1) axis in big gun hole 20 and the angle of vertical direction are greater than 70 °, now tamper touches the 3rd groove 12b of the second closure part under the deadweight frictional force effect of described big gun hole plugging device, and shift described big gun hole plugging device onto assigned address, then compacted, finally the second closure part 12 is fixed to the inwall in big gun hole 20; 2) axis in big gun hole 20 and the angle of vertical direction are less than 70 °, for preventing the plugging device landing of described big gun hole, can on fixed part fixed pulling rope to ensure that the first closure part 11 contacts with the second closure part 12, when described big gun hole plugging device is pulled to assigned address, firmly can hold stay cord on one side, firmly push tamper on one side, thus compacted big gun hole plugging device, finally the second closure part 12 is fixed to the inwall in big gun hole 20 in addition, the intensity of stay cord is preferably the 2-3 of the weight of described big gun hole plugging device doubly.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (16)
1. a big gun hole plugging device, it is characterized in that, the second closure part (12) that this big gun hole plugging device comprises the first closure part (11) and fixes near big gun aperture and with the inwall of big gun hole (20), described first closure part (11) matches with the circumferential profile of described second closure part (12) and the aperture in described big gun hole (20), described first closure part (11) has the angled first surface of axis with described big gun hole (20), described second closure part (12) has the angled second surface of axis with described big gun hole (20), described first closure part (11) contacts with second surface forming surface each other by described first surface with described second closure part (12).
2. big gun hole according to claim 1 plugging device, it is characterized in that, described first closure part (11) and the correspondence position of described second closure part (12) are provided with for the through hole (13) through detonator payment to a porter, and described through hole (13) is arranged along the axial direction of described big gun hole (20).
3. big gun hole according to claim 2 plugging device, it is characterized in that, the end face being provided with the position of described through hole (13) of described first closure part (11) is plane, the side of described end face is connected with the perisporium of described first closure part (11), opposite side is connected with described first surface, described end face is provided with fixed part, described fixed part is fixed with the stay cord for locating described first closure part (11).
4. big gun hole according to claim 1 plugging device, is characterized in that, the angle of the axis in the angle of the axis in described first surface and described big gun hole (20) and described second surface and described big gun hole (20) is 18 °-30 °.
5. big gun hole according to claim 1 plugging device, it is characterized in that, described second closure part (12) is fixed by binding agent with the inwall of described big gun hole (20), and the side of described second closure part (12) is provided with the first groove (12a) for placing described binding agent.
6. according to the big gun hole plugging device in claim 1-5 described in any one, it is characterized in that, described first surface and described second surface are shiny surface.
7. according to the big gun hole plugging device in claim 1-5 described in any one, it is characterized in that, one in described first surface and described second surface is provided with groove along the incline direction of described first surface or second surface, and another one is provided with for the track with described groove match.
8. big gun hole according to claim 7 plugging device, is characterized in that, described first closure part (11) is fixed with described second closure part (12).
9. big gun hole according to claim 8 plugging device, is characterized in that, described first closure part (11) and described second closure part (12) are bolted.
10. big gun hole according to claim 7 plugging device, it is characterized in that, this big gun hole plugging device comprises the side opposing with described second closure part (12) that be arranged at described first closure part (11) and for the sealing of the inwall and described first closure part (11) that seal described big gun hole (20).
11. big gun hole according to claim 7 plugging devices, is characterized in that, the end face of the side opposing with described second closure part (12) of described first closure part (11) is plane, and is provided with the second groove on this plane.
12. big gun hole according to claim 7 plugging devices, it is characterized in that, the side deviating from described first closure part (11) of described second closure part (12) is provided with for facilitating tamper described big gun hole plugging device to be pushed to the 3rd groove (12b) in described big gun hole (20).
13. big gun hole according to claim 7 plugging devices, it is characterized in that, described first closure part (11) is concrete or mortar material with the material of described second closure part (12), or, described first closure part (11) and/or described second closure part (12) have metal shell, and the inside of its metal shell is cast with concrete or mortar.
The method for blocking of 14. 1 kinds of big gun hole plugging devices according to claim 1-2,4-13 any one, it is characterized in that, described method for blocking comprises the following steps:
S1: send into the assigned address in described first closure part (11) and the second closure part (12) to described big gun hole (20) and the first surface of described first closure part (11) is contacted with the second surface forming surface of described second closure part (12);
S2: fixing described second closure part (12) is to the inwall of described big gun hole (20).
15. method for blocking according to claim 14, it is characterized in that, the end face being provided with the position of described through hole (13) of described first closure part (11) is plane, the side of described end face is connected with the perisporium of described first closure part (11), opposite side is connected with described first surface, described end face is provided with fixed part, described fixed part is fixed with the stay cord for locating described first closure part (11);
Described method for blocking also comprises: before described step S1, first on described fixed part, fix described stay cord, then hold described stay cord and described first closure part (11) and the second closure part (12) are sent in described big gun hole (20).
16. method for blocking according to claim 14, is characterized in that, before described method for blocking is also included in described step S1, described first closure part (11) and the second closure part (12) are fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410799965.1A CN104567568B (en) | 2014-12-19 | 2014-12-19 | A kind of big gun hole plugging device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410799965.1A CN104567568B (en) | 2014-12-19 | 2014-12-19 | A kind of big gun hole plugging device and method |
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| CN104567568A true CN104567568A (en) | 2015-04-29 |
| CN104567568B CN104567568B (en) | 2016-08-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105386740A (en) * | 2015-12-21 | 2016-03-09 | 核工业北京化工冶金研究院 | Method for sealing and plugging hole bottom of vertical deep hole through hole |
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| CN203083464U (en) * | 2012-12-18 | 2013-07-24 | 山西大同大学 | Shot hole wedge-shaped body blocking device |
| CN103759603A (en) * | 2013-12-23 | 2014-04-30 | 山西潞安环保能源开发股份有限公司 | Self-bursting self-latching hydraulic pressure dust proof friction extrusion bore hole blockage device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105386740A (en) * | 2015-12-21 | 2016-03-09 | 核工业北京化工冶金研究院 | Method for sealing and plugging hole bottom of vertical deep hole through hole |
| CN105386740B (en) * | 2015-12-21 | 2018-02-13 | 核工业北京化工冶金研究院 | A kind of method at vertical long hole through hole plugging hole bottom |
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| CN104567568B (en) | 2016-08-24 |
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