CN217712414U - Auxiliary drilling device suitable for blasting under narrow foundation pit concrete - Google Patents
Auxiliary drilling device suitable for blasting under narrow foundation pit concrete Download PDFInfo
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- CN217712414U CN217712414U CN202221210939.7U CN202221210939U CN217712414U CN 217712414 U CN217712414 U CN 217712414U CN 202221210939 U CN202221210939 U CN 202221210939U CN 217712414 U CN217712414 U CN 217712414U
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Abstract
The utility model relates to the technical field of blasting facilities, and discloses an auxiliary blasting drilling device suitable for blasting under narrow foundation pit concrete, which solves the technical problem that the surrounding enclosing structure of the foundation pit is easily influenced when the current blasting mode is used for blasting in narrow terrain, and comprises a drilling guide device and a rock fixing component; the drilling guide device is arranged in a plate shape, and the guide hole comprises a pre-crack hole, a buffer hole and a main blasting hole; the rock fixing assembly comprises suspension plates arranged on two sides of the drilling guide device and mounting pieces detachably connected to the suspension plates, and the mounting pieces are used for fixedly positioning the drilling guide device on the rock to be blasted. According to the technical scheme, the utility model provides a guarantee not influenced blasting unit of envelope under narrow and small foundation ditch, through the supplementary preparation operation that explodes that carries out of this blasting unit to reach the purpose of avoiding influencing the peripheral envelope of foundation ditch when the blasting.
Description
Technical Field
The utility model relates to a blasting facility technical field, more specifically say, it relates to a supplementary drilling equipment of blasting under being applicable to narrow and small foundation ditch concrete.
Background
Along with the fact that the pace of modern process is faster and faster in China, the excavation of large deep foundation pits is the most important part of modern large public buildings, and as far as the current construction technology is concerned, the blasting scheme visible in stone excavation blasting in China is as follows: a chamber blasting scheme, a shallow hole step blasting scheme, and a deep hole step blasting scheme.
Chamber blasting scheme: chamber blasting is a blasting scheme in which a plurality of tunnels (called chambers for short) capable of containing a large amount of explosive and a port leading to the chambers are bored in a rock mass to be blasted, and the explosive in the chambers is initiated to blast and break the rock mass to be blasted. The primary blasting amount of the chamber blasting is large, and is more than ten thousand cubic meters to dozens of thousand cubic meters; the blasting cost is low; the rock drilling equipment is simple and only needs a shallow hole drilling machine. However, the blasting scheme has large one-time investment in the initial stage, large blasting lumpiness and large secondary crushing amount; the side slope is greatly influenced by blasting due to large vibration.
Shallow hole bench blasting scheme: the shallow hole step blasting scheme is that a plurality of rows of blast holes (generally 38-42 mm) with the diameter smaller than 50mm are drilled in a rock body to be blasted, explosives are loaded into the blast holes, and the explosives in the blast holes are detonated to achieve the purpose of breaking rocks. The blasting scheme has the advantages of small blasting vibration, small harm to the side slope, no blasting large block, simple rock drilling equipment and convenient construction. However, this blasting scheme is costly and inefficient.
Deep hole bench blasting scheme: the deep hole bench blasting scheme is that blast holes with the diameter larger than 60mm are drilled in a rock body to be blasted, explosives are loaded into the blast holes, and the explosives loaded into the blast holes are detonated to achieve the purpose of breaking rocks. The drilling and blasting cost of the blasting scheme is lower than that of a shallow hole step blasting scheme, the blasting efficiency is higher, and the yield requirement can be met.
The three blasting schemes are in narrow terrain, the surrounding enclosing structures of the foundation pit are easily influenced, the mechanical excavation difficulty of the rock is high, the process is slow, and the blasting is performed under the condition that the surrounding enclosing structures of the foundation pit are not influenced.
SUMMERY OF THE UTILITY MODEL
Influence the peripheral envelope's of foundation ditch technical problem easily when blasting to the present blasting mode that proposes in the background art in narrow and small topography, the utility model provides a guarantee the not influenced blasting unit of envelope under narrow and small foundation ditch, carry out the preliminary operation of blasting through this blasting unit is supplementary to reach the purpose of avoiding influencing the peripheral envelope of foundation ditch when blasting.
In order to achieve the above purpose, the utility model provides a following technical scheme:
an auxiliary drilling device suitable for blasting under narrow foundation pit concrete comprises a drilling guide device and a rock fixing assembly;
the drilling guide device is in a plate shape, a plurality of rows of guide holes are formed in the drilling guide device, each guide hole comprises a pre-crack hole, a buffer hole and a main blast hole, and virtual straight lines where the pre-crack hole, the buffer hole and the main blast hole are located are arranged in parallel;
the pre-split holes comprise pre-split hole groups with a pre-split hole interval L1 between the pre-split holes; the buffer holes comprise buffer hole groups with a buffer hole pitch L2; the main blasting holes comprise main blasting hole groups with a main blasting hole spacing L3;
the rock fixing assembly comprises suspension plates arranged on two sides of the drilling guide device and mounting pieces detachably connected to the suspension plates, and the mounting pieces are used for fixedly positioning the drilling guide device on rock to be blasted.
Through above-mentioned technical scheme, supplementary drilling equipment's effect lies in guiding the drill bit of drilling equipment and fixes a position the drilling, and drilling equipment is through the guide effect of supplementary drilling equipment after, the blast hole that drills on the rock divide into prefracture hole, cushion hole and main blast hole. And arranging holes along the building enclosure according to the designed hole spacing. The buffer holes are arranged in front of the pre-splitting holes according to the designed thickness of the smooth layer and the designed hole spacing. And the conventional blast holes are arranged in front of the buffer blast holes according to the designed hole pattern parameters. Firstly arranging a pre-crack hole, then arranging a buffer hole, and then arranging a main blast hole forwards from the buffer hole.
The pre-cracking holes and the buffer holes can create new free surfaces to buffer the blasting impact force of the main blasting holes so as to achieve the purpose of protecting the enclosure structure of the foundation pit. The specific priming circuit and priming method adopts the electronic detonator (or a detonating cord) to enter the hole, adopts millisecond delay, and uses a special primer for the electronic detonator to detonate the priming circuit of the explosive at intervals of 20-150 milliseconds.
The utility model discloses further set up to: the pre-cracking hole, the buffer hole and the main blasting hole are all obliquely arranged.
Through above-mentioned technical scheme, the big gun hole becomes 75 jiaos of slope settings with ground, can effectually weaken horizontal direction blasting impact force, increase vertical direction blasting impact force to reach better blasting effect.
The utility model discloses further set up to: the L1 is set to be 3m, the hole spacing inside the pre-split hole group is 2.5m, and the number of the pre-split holes of the multiple groups of pre-split hole groups is different.
Through the technical scheme, the mesh is arranged according to the designed mesh parameters.
The utility model discloses further set up to: l2 sets up to 3m, the hole interval of buffering punch combination inside is 2.5m, and the multiunit the buffering punch combination's buffering hole quantity is different.
Through the technical scheme, the mesh is arranged according to the designed mesh parameters.
The utility model discloses further set up to: l3 sets up to 3m, the hole interval in the main blast hole group is 2.5m, and the multiunit main blast hole group's main blast hole quantity is different.
Through the technical scheme, the mesh is arranged according to the designed mesh parameters.
The utility model discloses further set up to: and the suspension plate is provided with a suspension hole.
Through the technical scheme, the plug connection can be realized.
The utility model discloses further set up to: the mounting piece is provided with a mounting column which is matched and spliced with the hanging hole, and the mounting column is detachably spliced in the hanging hole.
Through above-mentioned technical scheme, can realize detachable connection.
The utility model discloses further set up to: the pre-splitting holes are arranged in one row, the buffer holes are arranged in one row, and the main blasting holes are arranged in two rows.
Through the technical scheme, the mesh is arranged according to the designed mesh parameters.
To sum up, the utility model discloses following beneficial effect has:
(1) The initiation sequence is as follows; the method comprises the steps of firstly detonating the pre-splitting holes, then detonating the foremost row in the current blasting, then detonating the other main blasting holes in the rows one by one, and finally detonating the buffer holes, so that the enclosure structure is effectively prevented from being influenced under a narrow foundation pit.
Drawings
FIG. 1 is a top view of an auxiliary drilling apparatus;
fig. 2 is a sectional view of the auxiliary drilling apparatus.
Reference numerals: 1. a drill guide; 2. a rock securing assembly; 2-1, hanging a plate; 2-11, hanging holes; 2-2, mounting parts; 2-21, mounting columns; 3. a guide hole; 4. pre-cracking holes; 4-1, pre-splitting hole groups; 5. a buffer hole; 5-1, buffer hole group; 6. a primary blast hole; 6-1, and a main blast hole group.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, but the embodiments of the present invention are not limited thereto.
The utility model provides an auxiliary drilling device that explodes suitable for narrow and small foundation ditch concrete, can know with fig. 1 and fig. 2, auxiliary drilling device comprises drilling guiding device 1 and rock fixing component 2 two parts. The drill guide 1 is used to guide a drill of a drilling device in blasting and drilling, so that a blast hole having the same hole type structure as the drill guide 1 can be formed. The rock fixing assembly 2 is used for firmly fixing the drilling guide device 1 on the rock to be blasted and preventing the position of the drilling guide device 1 from changing to cause errors in the position of the drilled blast hole.
Specifically, as shown in fig. 1 and 2, the hole guide device 1 is formed in a plate shape, and a plurality of rows of guide holes 3 are opened in the hole guide device 1, and the guide holes 3 are used to guide a drill of a drilling machine, so that a blast hole having the same hole pattern as that of the hole guide device 1 can be formed. Furthermore, the guide hole 3 is provided with a pre-splitting hole 4, a buffer hole 5 and a main blasting hole 6, and virtual straight lines where the pre-splitting hole 4, the buffer hole 5 and the main blasting hole 6 are located are arranged in parallel.
To the structural arrangement of the rock fastening assembly 2, the rock fastening assembly 2 is specifically: a suspension plate 2-1 arranged on both sides of the drill guide 1 and an installation part 2-2 detachably connected to the suspension plate 2-1, the installation part 2-2 being intended for the fixed positioning of the drill guide 1 on the rock to be blasted. Wherein, the hanging plate 2-1 is provided with a hanging hole 2-11. The mounting piece 2-2 is provided with a mounting column 2-21 which is matched and spliced with the hanging hole 2-11, and the mounting column 2-21 is detachably spliced in the hanging hole 2-11, so that the connection between the mounting column and the hanging hole is realized. In number, in this embodiment, the pre-split holes 4 are arranged in one row, the buffer holes 5 are arranged in one row, and the main explosion holes 6 are arranged in two rows.
The pre-split holes 4 comprise pre-split hole groups 4-1 with a pre-split hole spacing L1 between each other; the buffer holes 5 include a buffer hole group 5-1 having a buffer hole pitch L2 therebetween; the primary blastholes 6 include a group of primary blasthole 6-1 having a primary blasthole spacing L3 therebetween.
The pre-crack hole 4, the buffer hole 5 and the main blast hole 6 are all obliquely arranged, and are arranged to be 75 degrees with the ground in the embodiment. L1 is set to be 3m, the hole spacing inside the pre-split hole group 4-1 is 2.5m, and the number of pre-split holes of the multiple groups of pre-split hole groups 4-1 is different. L2 is set to be 3m, the hole spacing inside the buffer hole group 5-1 is 2.5m, and the number of the buffer holes of the plurality of groups of buffer hole groups 5-1 is different. L3 is set to be 3m, the hole spacing inside the main blasting hole group 6-1 is 2.5m, and the main blasting holes of a plurality of groups of main blasting hole groups 6-1 are different in number.
The working principle is as follows: the initiation sequence is as follows; the method comprises the steps of firstly detonating the pre-splitting holes 4, then detonating the foremost row of the blasting, then detonating the main blasting holes 6 of the other rows one by one, and finally detonating the buffer holes 5, so that the enclosure structure is effectively prevented from being influenced under a narrow foundation pit, and the blasting device assists in carrying out the preliminary operation of blasting to achieve the purpose of avoiding influencing the enclosure structure around the foundation pit during blasting.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. An auxiliary drilling device suitable for blasting under narrow foundation pit concrete is characterized by comprising a drilling guide device (1) and a rock fixing component (2);
the drilling guide device (1) is in a plate shape, a plurality of rows of guide holes (3) are formed in the drilling guide device (1), each guide hole (3) comprises a pre-cracking hole (4), a buffer hole (5) and a main blasting hole (6), and virtual straight lines where the pre-cracking holes (4), the buffer holes (5) and the main blasting holes (6) are located are arranged in parallel;
the pre-split holes (4) comprise pre-split hole groups (4-1) with a pre-split hole interval L1 between each other; the buffer holes (5) comprise buffer hole groups (5-1) with a buffer hole pitch L2; the main blast holes (6) comprise main blast hole groups (6-1) with a main blast hole spacing L3 between each other;
the rock fixing assembly (2) comprises suspension plates (2-1) arranged on two sides of the drilling guide device (1) and mounting pieces (2-2) detachably connected to the suspension plates (2-1), and the mounting pieces (2-2) are used for fixedly positioning the drilling guide device (1) on rock to be blasted.
2. The device of claim 1 for assisting in drilling a hole in a narrow foundation pit during blasting concrete, which is characterized in that: the pre-cracking hole (4), the buffer hole (5) and the main blasting hole (6) are all obliquely arranged.
3. The auxiliary drilling device suitable for blasting under narrow foundation pit concrete of claim 1, characterized in that: the L1 is set to be 3m, the hole spacing in the pre-split hole group (4-1) is 2.5m, and the number of the pre-split holes in the multiple groups of the pre-split hole groups (4-1) is different.
4. The device of claim 1 for assisting in drilling a hole in a narrow foundation pit during blasting concrete, which is characterized in that: the L2 is set to be 3m, the hole spacing in the buffer hole group (5-1) is 2.5m, and the buffer holes in the buffer hole groups (5-1) are different in number.
5. The auxiliary drilling device suitable for blasting under narrow foundation pit concrete of claim 1, characterized in that: the L3 is set to be 3m, the hole spacing in the main blasting hole group (6-1) is 2.5m, and the main blasting holes in the main blasting hole groups (6-1) are different in number.
6. The device of claim 1 for assisting in drilling a hole in a narrow foundation pit during blasting concrete, which is characterized in that: the hanging plate (2-1) is provided with hanging holes (2-11).
7. The auxiliary drilling device suitable for blasting under narrow foundation pit concrete of claim 6, characterized in that: the mounting piece (2-2) is provided with a mounting column (2-21) which is matched and spliced with the hanging hole (2-11), and the mounting column (2-21) is detachably spliced in the hanging hole (2-11).
8. The auxiliary drilling device suitable for blasting under narrow foundation pit concrete of claim 1, characterized in that: the pre-cracking holes (4) are arranged in one row, the buffer holes (5) are arranged in one row, and the main blasting holes (6) are arranged in two rows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221210939.7U CN217712414U (en) | 2022-05-17 | 2022-05-17 | Auxiliary drilling device suitable for blasting under narrow foundation pit concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221210939.7U CN217712414U (en) | 2022-05-17 | 2022-05-17 | Auxiliary drilling device suitable for blasting under narrow foundation pit concrete |
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| Publication Number | Publication Date |
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| CN217712414U true CN217712414U (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221210939.7U Active CN217712414U (en) | 2022-05-17 | 2022-05-17 | Auxiliary drilling device suitable for blasting under narrow foundation pit concrete |
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| Country | Link |
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| CN (1) | CN217712414U (en) |
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2022
- 2022-05-17 CN CN202221210939.7U patent/CN217712414U/en active Active
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