Damping blasting structure close to wired tunnel and blasting construction method

Abstract

The invention relates to the technical field of wired tunnel shock absorption blasting, in particular to a shock absorption blasting structure close to a wired tunnel and a blasting construction method.The shock absorption blasting structure close to the wired tunnel is characterized in that slotting holes, coping holes, bottom plate holes, inner ring holes, peripheral holes and blasting shock absorption holes are distributed in the section of the tunnel; the blast holes formed in the high section position serve as shock absorption holes of the blast holes in the low section position at the same time, the blasting shock absorption holes can serve as shock absorption holes of the cut holes, rock mass thrown out when the cut holes are blasted can be crushed again, the block diameter of the rock mass is reduced, and the situation that the cut holes need to be subjected to secondary blasting due to the fact that the block diameter of the rock mass blasted by the cut holes is too large is avoided; and vibration velocity superposition of the underholing holes in the center of the tunnel can be reduced, and the transverse vibration velocity of the underholing holes is further reduced. According to the blasting construction method, each blast hole is subjected to segmented blasting, the total explosive quantity of a single segment of a cut hole can be reduced, the vibration velocity can be reduced on a blasting propagation path, the safety of an adjacent building can be guaranteed, the construction difficulty and the construction cost can be reduced, and the construction efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of wired tunnel shock-absorbing blasting, and in particular to a wired tunnel-adjacent shock-absorbing blasting structure and a blasting construction method. Background Art

[0002] With the increasing development of transportation in my country, various transportation lines have spread all over the country, and the scale of tunnel construction has also become more and more perfect. Since 1990, in the past 34 years, the scale of tunnel construction in China has increased by 24 times, and the construction mileage has exceeded half of the world's total. By the end of 2023, there will be 18,573 railway tunnels in operation with a total length of 23,508 kilometers, including 4,561 high-speed railway tunnels with a total length of 7,735 kilometers. By the end of 2022, there will be 24,850 highway tunnels in operation with a total length of 26.7843 million meters. With the continuous improvement of the road network, the number of subsequent new tunnel projects close to the construction of the completed wired tunnels will continue to increase. Although the vibration velocity of the groove eye can be reduced on the basis of reducing the amount of single-stage explosives during construction, it will also constrain the footage length of each cycle of the tunnel, thereby increasing the overall cost and construction progress of the construction.

[0003] In addition, a Chinese invention patent application with patent application number 201310078803.4 discloses a construction method for tunnel shock-absorbing hole controlled blasting. This construction method requires drilling a separate shock-absorbing hole outside the blasting shock-absorbing hole when the vibration velocity spreads outward, thereby increasing construction costs and reducing construction efficiency.

[0004] In addition, the Chinese invention patent application with patent application number 202210946221.2 discloses a shock-absorbing blasting structure and construction method for an urban tunnel. The prior art cannot detonate the blasting shock-absorbing hole once, and it is necessary to blast the pre-crack hole first, and then detonate the blasting shock-absorbing hole for a second time, resulting in problems of great construction difficulty, high construction cost, and low construction efficiency. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, the first purpose of the present invention is to provide a shock-absorbing blasting structure adjacent to a wired tunnel, which can reduce the total amount of explosives in a single section of the grooving eye, reduce the vibration speed on the blasting propagation path, ensure the safety of nearby buildings, reduce construction difficulty and construction cost, and improve construction efficiency.

[0006] The second object of the present invention is to provide a blasting construction method for a shock-absorbing blasting structure adjacent to a wired tunnel, which has the advantages of reducing construction difficulty and construction cost and improving construction efficiency.

[0007] In order to achieve the first object of the above invention, the technical solution adopted by the present invention is as follows:

[0008] The present invention provides a vibration reduction blasting structure adjacent to a wired tunnel, comprising a tunnel section and blast holes arranged on the tunnel section, wherein the blast holes include a groove hole, a top pressure hole, a bottom plate hole, an inner circle hole, a peripheral hole and a vibration reduction blasting hole;

[0009] The peripheral eye is arranged in an arc shape at the outermost side of the tunnel section, and the inner circle eye is arranged in an arc shape at the inner side of the peripheral eye;

[0010] The bottom plate eye is arranged in a horizontal straight line at the bottom of the tunnel section, and the top pressure eye is arranged in a horizontal straight line in several sections at the upper part of the tunnel section and placed on the inner side of the inner circle eye;

[0011] The cutout holes are arranged in a longitudinal straight line in a plurality of groups in the middle of the tunnel section and are placed between the capping holes and the bottom plate holes;

[0012] The plurality of groups of groove holes include left groove holes and right groove holes that are bilaterally symmetrical, and the blasting shock-absorbing holes are arranged in a longitudinal straight line between the left groove holes and the right groove holes;

[0013] The groove holes, top pressure holes, bottom plate holes, inner circle holes and peripheral holes are all provided with explosive components; one of the blasting shock-absorbing holes is provided with an explosive component.

[0014] Among them, each section of each group of groove holes is arranged on the same straight line, which can reduce the vibration speed in the horizontal and vertical propagation paths after the groove holes are blasted, thereby ensuring the safety of nearby buildings.

[0015] The present invention discloses a shock-absorbing blasting structure for a tunnel adjacent to a wired tunnel. The tunnel section is provided with slot holes, top pressure holes, bottom plate holes, inner circle holes, peripheral holes and blasting shock-absorbing holes. The slot holes, top pressure holes, bottom plate holes, inner circle holes and peripheral holes are all provided with explosive assemblies. One of the blasting shock-absorbing holes is provided with an explosive assembly. Among each blast hole, the blast hole arranged at a high level also serves as a shock-absorbing hole for a low-level blast hole, and no other shock-absorbing holes need to be arranged separately. The blasting shock-absorbing hole arranged between the left slot hole and the right slot hole, because one of the blasting shock-absorbing holes is equipped with an explosive assembly, the blasting shock-absorbing hole can be used as a shock-absorbing hole for the slot hole, and can also crush the rock mass thrown out when the slot hole is blasted again, reduce the rock mass block diameter, and prevent the slot hole from being blasted with a large rock mass block diameter, which requires secondary blasting of the slot hole. It can also reduce the superposition of the vibration velocity of the slot hole in the center of the tunnel, and further reduce the lateral vibration velocity of the slot hole. Therefore, the shock-absorbing blasting structure of the adjacent wired tunnel can reduce the total amount of explosives in a single section of the groove eye, reduce the vibration speed on the blasting propagation path, ensure the safety of nearby buildings, reduce construction difficulty and construction cost, and improve construction efficiency.

[0016] Furthermore, there are four blasting damping holes, one of which is provided with the explosive assembly. Since one of the blasting damping holes is provided with the explosive assembly, the rock mass thrown out during the slot blasting can be crushed again, thereby reducing the rock mass block diameter, so as to prevent the rock mass block diameter generated during the slot blasting from being too large and requiring secondary blasting of the slot, thereby reducing the construction difficulty and construction cost and improving the construction efficiency; at the same time, the blasting damping holes of this section are also arranged in a longitudinal straight line form, and the setting of the blasting damping holes of this section is consistent with the horizontal position of the first slot, thereby reducing the superposition of the vibration velocity of the first slot in the center of the tunnel, and further reducing the lateral vibration velocity of the slot.

[0017] Furthermore, the left-side cutouts and the right-side cutouts are both provided with an upper group of cutouts and a lower group of cutouts, and the upper group of cutouts and the lower group of cutouts are both provided with multiple sections of cutouts in a longitudinal straight line form. The upper group of cutouts can be used as shock-absorbing holes for the lower group of cutouts during blasting construction, so there is no need to drill other shock-absorbing holes on the outer layout of the cutouts, thereby reducing construction difficulty and construction cost and improving construction efficiency.

[0018] Furthermore, the capping eye includes five capping eyes arranged in a transverse straight line form, wherein four capping eyes are arranged symmetrically on the left and right sides in pairs, and another capping eye is arranged on the upper part of the four capping eyes and placed in the top middle position of the tunnel section.

[0019] Furthermore, the explosive assembly includes an electronic detonator disposed in the blasthole, wherein the electronic detonator enables the blasthole to be blasted in sections, thereby reducing vibration velocity superposition and ensuring the safety of nearby buildings.

[0020] Furthermore, the first section of the grooved eyes in the lower group of grooved eyes close to the blasting shock-absorbing hole is an uncoupled charge structure, an air bag is arranged in the bottom of the hole of the first section of the grooved eyes, and a self-adhesive coil is arranged on the side of the first section of the grooved eyes close to the structure. The self-adhesive coil is a foam or plastic self-adhesive coil. By arranging an air bag in the bottom of the hole of the first section of the grooved eyes, the charge structure at the bottom of the hole is an uncoupled charge, thereby reducing the vibration velocity propagating in the longitudinal direction after the blasting. In addition, by arranging a self-adhesive coil on the side of the first section of the grooved eyes close to the structure, the lateral charge structure of the grooved eyes is an uncoupled charge, thereby reducing the vibration velocity propagating into the surrounding rock and reducing the blasting vibration velocity in the lateral direction.

[0021] Furthermore, the length of the airbag is set to 5 cm to 10 cm; wherein the airbag of this length makes the charge at the bottom of the hole uncoupled and reduces the blasting vibration velocity in the longitudinal direction. And / or

[0022] The first section of the cutout hole is in the same horizontal position as the blasting shock absorbing hole; and / or

[0023] The depth of the blasting shock-absorbing hole is half the depth of the first section of the cutout hole.

[0024] In order to achieve the second purpose of the above invention, the technical solution adopted by the present invention is as follows:

[0025] The present invention provides a blasting construction method for a shock-absorbing blasting structure adjacent to a wired tunnel, comprising the following steps:

[0026] S1. Hole arrangement: according to the shock-absorbing blasting structure of the adjacent wired tunnel, blast holes are arranged on the tunnel section, including groove holes, top pressure holes, bottom plate holes, inner circle holes, peripheral holes and blasting shock-absorbing holes;

[0027] S2. Charge: explosive components are installed on the cutout holes, top pressure holes, bottom plate holes, inner circle holes, and peripheral holes, and an explosive component is installed on one of the blasting shock-absorbing holes;

[0028] S3. Laying out the uncoupled charge structure: Laying out the uncoupled charge structure in the first section of the two groups of lower grooves symmetrically arranged near the blasting shock-absorbing holes, wherein an air bag is arranged in the bottom of the first section of the grooves, and a self-adhesive roll is arranged on the side of the first section of the grooves close to the building;

[0029] S4. Segmental detonation: The grooved eyes, capping eyes, bottom plate eyes, inner circle eyes and peripheral eyes are all detonated in segments. First, the first segment of the lower group of grooved eyes is detonated, and then the blasting shock-absorbing holes are detonated. Then, the upper group of grooved eyes and the lower group of grooved eyes are detonated in segments from bottom to top in the form of an inverted "Z". Then, the two symmetrical lower segments of the inner circle eye, the two symmetrical lower segments of the peripheral eye, the middle segment of the bottom plate eye, and the two side segments of the bottom plate eye are detonated respectively. Then, multiple segments of the capping eyes are detonated from bottom to top, and then the upper segment of the inner circle eye is detonated, and then the two symmetrical middle segments of the peripheral eye are detonated, and then the upper segment of the peripheral eye is detonated, thereby completing the blasting construction of the shock-absorbing blasting structure adjacent to the wired tunnel.

[0030] The invention discloses a blasting construction method for a shock-absorbing blasting structure adjacent to a wired tunnel. Since each blast hole is detonated in sections, and the low-section blast holes are detonated first and then the high-section blast holes, the high-section blast holes also serve as shock-absorbing holes for the low-section blast holes, and the blasting shock-absorbing holes also serve as shock-absorbing holes for the first section of a group of slot holes below. By crushing the rock mass thrown out during the slot hole blasting again and reducing the rock mass block diameter, it is possible to prevent the need for secondary blasting of the slot hole and reduce the total single-section charge amount of the slot hole, and reduce the vibration speed on the blasting propagation path, thereby ensuring the safety of adjacent buildings, reducing the construction difficulty and construction cost, and improving the construction efficiency.

[0031] Furthermore, in the S4 segmented detonation step, the blasting time difference of each segment detonation is 30ms to 50ms. This blasting time difference can make the blastholes in other segments simultaneously play the role of shock-absorbing holes, and the blastholes that are blasted immediately afterwards can also crush the rock mass thrown out by the blastholes that were blasted earlier, which can well reduce the rock mass block diameter and avoid secondary blasting of the blastholes.

[0032] Furthermore, in step S3, the self-adhesive coil is a foam or plastic self-adhesive coil. By arranging the self-adhesive coil on the side of the first section of the cutout close to the structure, the lateral charge structure of the cutout is uncoupled charge, thereby reducing the vibration velocity propagating into the surrounding rock and reducing the blasting vibration velocity in the lateral direction.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] (1) A shock-absorbing blasting structure for a tunnel adjacent to a wired tunnel of the present invention is provided with slot holes, top pressure holes, bottom plate holes, inner circle holes, peripheral holes and blasting shock-absorbing holes in the tunnel section, wherein the slot holes, top pressure holes, bottom plate holes, inner circle holes and peripheral holes are all provided with explosive assemblies, and one of the blasting shock-absorbing holes is provided with an explosive assembly. Among them, in each blast hole, the blast hole arranged at a high level also serves as a shock-absorbing hole for the blast hole at a low level, and no other shock-absorbing holes need to be arranged separately. The blasting shock-absorbing hole arranged between the left slot hole and the right slot hole, since one of the blasting shock-absorbing holes is equipped with an explosive assembly, the blasting shock-absorbing hole can be used as a shock-absorbing hole for the slot hole, and can also crush the rock mass thrown out when the slot hole is blasted again, reduce the rock mass block diameter, and prevent the slot hole from being blasted with a large rock mass block diameter, and need to be blasted again for the slot hole, and can also reduce the superposition of the vibration velocity of the slot hole in the center of the tunnel, and further reduce the lateral vibration velocity of the slot hole. Therefore, the shock-absorbing blasting structure of the adjacent wired tunnel can reduce the total amount of explosives in a single section of the groove eye, reduce the vibration speed on the blasting propagation path, ensure the safety of nearby buildings, reduce construction difficulty and construction cost, and improve construction efficiency.

[0035] (2) The present invention provides a blasting construction method for a shock-absorbing blasting structure adjacent to a wired tunnel. Since each blast hole is detonated in sections, and the low-section blast holes are detonated first and then the high-section blast holes, the high-section blast holes also serve as shock-absorbing holes for the low-section blast holes, and the blasting shock-absorbing holes also serve as shock-absorbing holes for the first section of a group of slot holes below. By crushing the rock mass thrown out during the blasting of the slot holes again and reducing the rock mass block diameter, it is possible to prevent the need for secondary blasting of the slot holes and reduce the total amount of explosives in a single section of the slot holes. It is also possible to reduce the vibration velocity on the blasting propagation path, thereby ensuring the safety of nearby buildings, reducing the construction difficulty and cost, and improving the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a structural schematic diagram of a shock-absorbing blasting structure adjacent to a wired tunnel of the present invention.

[0038] Figure 2 It is a schematic diagram of an uncoupled charge structure of the first section of the cutout hole in a shock-absorbing blasting structure adjacent to a wired tunnel according to the present invention.

[0039] Figure 3 It is a structural schematic diagram of a first section of a groove hole in a shock-absorbing blasting structure adjacent to a wired tunnel of the present invention, in which a self-adhesive coiled material is arranged on a side close to a building.

[0040] Reference numerals:

[0041] Grooved eye section 1, grooved eye section 2, grooved eye section 3, grooved eye section 4, grooved eye section 5, grooved eye section 6, grooved eye section 7, grooved eye section 8, grooved eye section 9, grooved eye section 10, grooved eye section 11, grooved eye section 12, inner circle eye section 13, peripheral eye section 14, bottom plate eye section 15, bottom plate eye section 16, top pressure eye section 17, top pressure eye section 18, top pressure eye 19, inner circle eye section 20, peripheral eye section 21, peripheral eye section 22, self-adhesive roll material Ⅰ, airbag Ⅱ. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. In the present invention, the singular forms "a", "said" and "the" used in the embodiments and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0044] In an embodiment of the present invention, a shock-absorbing blasting structure adjacent to a wired tunnel includes a tunnel section and blast holes arranged in the tunnel section, wherein the blast holes include a groove hole, a top pressure hole, a bottom plate hole, an inner circle hole, a peripheral hole and a blast shock-absorbing hole;

[0045] The peripheral eye is arranged in an arc shape at the outermost side of the tunnel section, and the inner circle eye is arranged in an arc shape at the inner side of the peripheral eye;

[0046] The bottom plate eye is arranged in a horizontal straight line at the bottom of the tunnel section, and the top pressure eye is arranged in a horizontal straight line in several sections at the upper part of the tunnel section and placed on the inner side of the inner circle eye;

[0047] The cutout holes are arranged in a longitudinal straight line in a plurality of groups in the middle of the tunnel section and are placed between the capping holes and the bottom plate holes;

[0048] The plurality of groups of groove holes include left groove holes and right groove holes that are bilaterally symmetrical, and the blasting shock-absorbing holes are arranged in a longitudinal straight line between the left groove holes and the right groove holes;

[0049] The groove holes, top pressure holes, bottom plate holes, inner circle holes and peripheral holes are all provided with explosive components; one of the blasting shock-absorbing holes is provided with an explosive component.

[0050] Among them, each section of each group of groove holes is arranged on the same straight line, which can reduce the vibration speed in the horizontal and vertical propagation paths after the groove holes are blasted, thereby ensuring the safety of nearby buildings.

[0051] In the embodiment, a shock-absorbing blasting structure adjacent to a wired tunnel is provided with slotted holes, top-pressed holes, bottom-plate holes, inner-circle holes, peripheral holes and blasting shock-absorbing holes in the tunnel section, wherein the slotted holes, top-pressed holes, bottom-plate holes, inner-circle holes and peripheral holes are all provided with explosive assemblies, and one of the blasting shock-absorbing holes is provided with an explosive assembly. Among them, in each blast hole, the blast hole set at a high level also serves as a shock-absorbing hole for the blast hole at a low level, and no other shock-absorbing holes need to be arranged separately. The blasting shock-absorbing hole set between the left slotted hole and the right slotted hole, since one of the blasting shock-absorbing holes is equipped with an explosive assembly, the blasting shock-absorbing hole set can not only serve as a shock-absorbing hole for the slotted hole, but also can crush the rock mass thrown out when the slotted hole is blasted again, reduce the rock mass block diameter, and prevent the slotted hole from being blasted with a large rock mass block diameter, which requires a secondary blasting of the slotted hole, and can also reduce the superposition of the vibration velocity of the slotted hole in the center of the tunnel, and further reduce the lateral vibration velocity of the slotted hole. Therefore, the shock-absorbing blasting structure of the adjacent wired tunnel can reduce the total amount of explosives in a single section of the groove eye, reduce the vibration speed on the blasting propagation path, ensure the safety of nearby buildings, reduce construction difficulty and construction cost, and improve construction efficiency.

[0052] In some embodiments, there are four blasting damping holes, one of which is provided with the explosive assembly. Since one of the blasting damping holes is provided with the explosive assembly, the rock mass thrown out during the slot blasting can be crushed again, thereby reducing the rock mass block diameter, so as to prevent the rock mass block diameter generated during the slot blasting from being too large and requiring secondary blasting of the slot, thereby reducing the construction difficulty and construction cost and improving the construction efficiency; at the same time, the blasting damping holes of this section are also arranged in a longitudinal straight line form, and the setting of the blasting damping holes of this section is consistent with the horizontal position of the first slot, thereby reducing the superposition of the vibration velocity of the first slot in the center of the tunnel, and further reducing the lateral vibration velocity of the slot.

[0053] In some embodiments, the left-side cutouts and the right-side cutouts are both provided with an upper group of cutouts and a lower group of cutouts, and the upper group of cutouts and the lower group of cutouts are both provided with multiple sections of cutouts in a longitudinal straight line. The upper group of cutouts can be used as shock-absorbing holes for the lower group of cutouts during blasting construction, so there is no need to drill other shock-absorbing holes on the outer layout of the cutouts, thereby reducing construction difficulty and construction cost and improving construction efficiency.

[0054] In some embodiments, the capping eye includes five capping eyes arranged in a horizontal straight line form, wherein four capping eyes are arranged symmetrically on the left and right sides in pairs, and another capping eye is arranged on the upper part of the four capping eyes and placed in the top middle position of the tunnel section.

[0055] In some embodiments, the explosive assembly includes an electronic detonator disposed in the blasthole, wherein the electronic detonator enables the blasthole to be blasted in sections, thereby reducing vibration velocity superposition and ensuring the safety of nearby buildings.

[0056] In some embodiments, the first section of the grooved holes in the lower group of grooved holes close to the blasting shock-absorbing hole is an uncoupled charge structure, an air bag is arranged in the bottom of the hole of the first section of the grooved holes, and a self-adhesive coil is arranged on the side of the first section of the grooved holes close to the structure. The self-adhesive coil is a foam or plastic self-adhesive coil. By arranging an air bag in the bottom of the hole of the first section of the grooved holes, the charge structure at the bottom of the hole is an uncoupled charge, thereby reducing the vibration velocity propagating in the longitudinal direction after the blasting. In addition, by arranging a self-adhesive coil on the side of the first section of the grooved holes close to the structure, the lateral charge structure of the grooved holes is an uncoupled charge, thereby reducing the vibration velocity propagating into the surrounding rock and reducing the blasting vibration velocity in the lateral direction.

[0057] In some embodiments, the length of the airbag is set to 5 cm to 10 cm; wherein, the airbag of this length makes the charging of the slot hole at the bottom of the hole an uncoupled structure, and at the same time reduces the blasting vibration velocity in the longitudinal direction.

[0058] and / or

[0059] The first section of the cutout hole is in the same horizontal position as the blasting shock absorbing hole; and / or

[0060] The depth of the blasting shock-absorbing hole is half the depth of the first section of the cutout hole.

[0061] In an embodiment of the present invention, a blasting construction method for a shock-absorbing blasting structure adjacent to a wired tunnel comprises the following steps:

[0062] S1. Hole arrangement: according to the shock-absorbing blasting structure of the adjacent wired tunnel, blast holes are arranged on the tunnel section, including groove holes, top pressure holes, bottom plate holes, inner circle holes, peripheral holes and blasting shock-absorbing holes;

[0063] S2. Charge: explosive components are installed on the cutout holes, top pressure holes, bottom plate holes, inner circle holes, and peripheral holes, and an explosive component is installed on one of the blasting shock-absorbing holes;

[0064] S3. Laying out the uncoupled charge structure: Laying out the uncoupled charge structure in the first section of the two groups of lower grooves symmetrically arranged near the blasting shock-absorbing holes, wherein an air bag is arranged in the bottom of the first section of the grooves, and a self-adhesive roll is arranged on the side of the first section of the grooves close to the building;

[0065] S4. Segmental detonation: The grooved eyes, capping eyes, bottom plate eyes, inner circle eyes and peripheral eyes are all detonated in segments. First, the first segment of the lower group of grooved eyes is detonated, and then the blasting shock-absorbing holes are detonated. Then, the upper group of grooved eyes and the lower group of grooved eyes are detonated in segments from bottom to top in the form of an inverted "Z". Then, the two symmetrical lower segments of the inner circle eye, the two symmetrical lower segments of the peripheral eye, the middle segment of the bottom plate eye, and the two side segments of the bottom plate eye are detonated respectively. Then, multiple segments of the capping eyes are detonated from bottom to top, and then the upper segment of the inner circle eye is detonated, and then the two symmetrical middle segments of the peripheral eye are detonated, and then the upper segment of the peripheral eye is detonated, thereby completing the blasting construction of the shock-absorbing blasting structure adjacent to the wired tunnel.

[0066] The invention discloses a blasting construction method for a shock-absorbing blasting structure adjacent to a wired tunnel. Since each blast hole is detonated in sections, and the low-section blast holes are detonated first and then the high-section blast holes, the high-section blast holes also serve as shock-absorbing holes for the low-section blast holes, and the blasting shock-absorbing holes also serve as shock-absorbing holes for the first section of a group of slot holes below. By crushing the rock mass thrown out during the slot hole blasting again and reducing the rock mass block diameter, it is possible to prevent the need for secondary blasting of the slot hole and reduce the total single-section charge amount of the slot hole, and reduce the vibration speed on the blasting propagation path, thereby ensuring the safety of adjacent buildings, reducing the construction difficulty and construction cost, and improving the construction efficiency.

[0067] In some embodiments, in the S4 segmented detonation step, the blasting time difference of each segment detonation is 30ms to 50ms. This blasting time difference can make the blastholes in other segments simultaneously play the role of shock-absorbing holes, and the blastholes that are blasted immediately afterwards can also crush the rock mass thrown out by the blastholes that were blasted earlier, which can well reduce the rock mass block diameter and avoid secondary blasting of the blastholes.

[0068] In some embodiments, in step S3, the self-adhesive coil is a foam or plastic self-adhesive coil. By arranging the self-adhesive coil on the side of the first section of the cutout close to the structure, the lateral charge structure of the cutout is uncoupled charge, thereby reducing the vibration velocity propagating into the surrounding rock and reducing the blasting vibration velocity in the lateral direction.

[0069] The following describes the invention in conjunction with specific embodiments.

[0070] Example 1

[0071] A shock-absorbing blasting structure adjacent to a wired tunnel, such as Figures 1 to 3 As shown, it includes a tunnel section and blast holes arranged in the tunnel section, and the blast holes include groove holes, top pressure holes, bottom plate holes, inner circle holes, peripheral holes and blasting shock-absorbing holes.

[0072] In this embodiment, the peripheral eye is arranged in an arc shape at the outermost side of the tunnel section, such as Figure 1 As shown, the peripheral eye includes 14, 21 and 22 segments arranged from bottom to top, wherein the peripheral eye 14 segment and the peripheral eye 21 segment each include two segments that are symmetrical on the left and right, and the peripheral eye 22 segment is arranged at the top of the tunnel section. Each segment of the peripheral eye includes a plurality of peripheral eyes arranged in an arc shape.

[0073] In this embodiment, the inner circle eye is arranged in an arc shape inside the peripheral eye. Figure 1 As shown, the inner circle eye includes 13 segments and 20 segments arranged from bottom to top, wherein the inner circle eye 13 segment includes two segments that are symmetrical on the left and right, and the inner circle eye 20 segment is arranged below the peripheral eye 22 segment. Each segment of the inner circle eye includes a plurality of inner circle eyes arranged in an arc shape.

[0074] In this embodiment, the floor eye is arranged in a horizontal straight line at the bottom of the tunnel section, and all floor eyes are arranged on the same straight line. The floor eye includes 15 sections and 16 sections, wherein the floor eye 16 section includes two sections that are symmetrical and arranged on both sides of the floor eye 15 section. In this embodiment, the floor eye 16 section is a blast hole, and the floor eye 15 section includes multiple blast holes.

[0075] In this embodiment, the capping eye is arranged in a transverse straight line in several sections on the upper part of the tunnel section and is placed on the inner side of the inner circle eye. Figure 1As shown, the top pressure eye includes 17 segments, 18 segments and 19 segments arranged from bottom to top. Among them, the top pressure eye 17 segment and the top pressure eye 18 segment each include two left-right symmetrical segments, and the top pressure eye 19 segment is arranged above the top pressure eye 17 segment and the top pressure eye 18 segment, and is placed in the middle position between the two left-right symmetrical segments.

[0076] In this embodiment, the cutout holes are divided into four groups and arranged in the middle of the tunnel section in the form of longitudinal straight lines and placed between the top pressure holes and the bottom plate holes.

[0077] In this embodiment, the four groups of grooved eyes include left and right symmetrical grooved eyes, and both the left and right grooved eyes are provided with an upper group of grooved eyes and a lower group of grooved eyes, and both the upper group of grooved eyes and the lower group of grooved eyes are provided with multiple sections of grooved eyes arranged in a longitudinal straight line form. Among them, the lower group of grooved eyes that are symmetrical to each other include grooved eye section 1, grooved eye section 3, grooved eye section 5, grooved eye section 7, grooved eye section 9 and grooved eye section 11 arranged from the inside to the outside. In this embodiment, grooved eye section 1 is the first section of grooved eyes described in this application, including four blast holes arranged in a longitudinal straight line form. Grooved eye section 3 includes three blast holes arranged in a longitudinal straight line form, and grooved eye sections 5, 7, 9 and 11 each include two blast holes arranged in a longitudinal straight line form.

[0078] Among them, the upper group of grooved eyes that are symmetrical on both sides include grooved eyes 2 sections, grooved eyes 4 sections, grooved eyes 6 sections, grooved eyes 8 sections, grooved eyes 10 sections and grooved eyes 12 sections arranged from the inside to the outside. In this embodiment, the blastholes of grooved eyes 2 sections, grooved eyes 4 sections, grooved eyes 6 sections, grooved eyes 8 sections and grooved eyes 10 sections are arranged symmetrically with grooved eyes 1 section, grooved eyes 3 sections, grooved eyes 5 sections, grooved eyes 7 sections and grooved eyes 9 sections. In this embodiment, grooved eyes 12 sections are set as one blasthole.

[0079] In this embodiment, the blasting shock-absorbing holes are arranged in a longitudinal straight line between the left groove hole and the right groove hole. In this embodiment, the blasting shock-absorbing holes include 1.5 sections of blasting shock-absorbing holes arranged in a longitudinal form on the same straight line. The blasting shock-absorbing holes 1.5 sections are arranged at the center position between the groove hole 1 sections on the left and right sides, that is, the groove hole 1 sections on the left and right sides are symmetrically arranged with the blasting shock-absorbing holes 1.5 sections as the center, so that after the groove hole 1 section is blasted, the blasting shock-absorbing holes 1.5 sections are blasted immediately, so that the blasting shock-absorbing holes 1.5 sections can also be used as shock-absorbing holes for the groove hole 1 section, which can reduce the vibration speed on the propagation path of the blasting, ensure the safety of nearby buildings, and reduce the construction difficulty and construction cost, and improve the construction efficiency.

[0080] In this embodiment, the blasting shock-absorbing hole 1.5 is provided with four blast holes, and one of the blasting shock-absorbing holes is provided with an explosive assembly. Among them, since the blasting shock-absorbing hole is provided with an explosive assembly, the rock mass thrown out during the blasting of the slot hole 1 is crushed again to reduce the rock mass block diameter, so that the slot hole can be prevented from being subjected to secondary blasting, and the total amount of explosives in a single section of the slot hole can be reduced, thereby reducing the construction difficulty and construction cost and improving the construction efficiency.

[0081] In this embodiment, the groove holes, top pressure holes, bottom plate holes, inner circle holes and peripheral holes are all provided with explosive assemblies, so that they can be blasted in sections in sequence. The blast holes blasted later can serve as shock-absorbing holes for the blast holes blasted earlier, and can also crush the rock mass thrown out by the blast holes blasted earlier again to reduce the rock mass block diameter, thereby preventing the blast holes from needing to be blasted a second time.

[0082] In this embodiment, the explosive assembly includes an electronic detonator arranged in the blast hole, so that the blasting process can be well controlled.

[0083] In this embodiment, the first section of the grooved hole in the lower group of grooved holes close to the blasting shock-absorbing hole, that is, the grooved hole section 1, is an uncoupled charge structure, such as Figure 2 and Figure 3 As shown, an air bag II is arranged at the bottom of the hole of the first section of the cutout hole, and a self-adhesive roll material I is arranged at the side of the first section of the cutout hole close to the structure, wherein the self-adhesive roll material is a foam or plastic self-adhesive roll material. By arranging an air bag II at the bottom of the hole of the first section of the cutout hole, the charge structure at the bottom of the hole is made to be an uncoupled charge, thereby reducing the vibration velocity propagating in the longitudinal direction after blasting. In addition, by arranging a self-adhesive roll material I at the side of the first section of the cutout hole close to the structure, the lateral charge structure of the cutout hole is made to be an uncoupled charge, thereby reducing the vibration velocity propagating into the surrounding rock and reducing the blasting vibration velocity in the lateral direction.

[0084] In this embodiment, the length of the airbag II is set to 8m; the length of the airbag II can well make the charging of the slot hole at the bottom of the hole an uncoupled structure, and at the same time reduce the blasting vibration velocity in the longitudinal direction.

[0085] In this embodiment, the horizontal positions of the groove hole section 1 and the blasting shock-absorbing hole section 1.5 are consistent, and both are provided with four blast holes. Therefore, the blasting shock-absorbing hole section 1.5 can well serve as the shock-absorbing hole of the groove hole section 1, and can also crush the rock thrown out when the groove hole section 1 is blasted again to reduce the rock block diameter. Therefore, it can prevent the need for secondary blasting of the groove eye and reduce the total amount of explosives in a single section of the groove eye, thereby reducing the construction difficulty and construction cost and improving the construction efficiency.

[0086] In this embodiment, the depth of the blast hole in the blasting damping hole 1.5 is half the depth of the blast hole in the groove hole 1. Therefore, the blasting damping hole 1.5 can be well used as the damping hole of the groove hole 1, and the construction difficulty and construction cost can be reduced, and the construction efficiency can be improved.

[0087] Example 2

[0088] The present embodiment is a shock-absorbing blasting structure adjacent to a wired tunnel. The difference between the present embodiment and embodiment 1 is that, in the present embodiment, the length of the airbag II is set to 5 cm; the length of the airbag II can well make the charging of the groove eye at the bottom of the hole an uncoupled structure, while reducing the blasting vibration velocity in the longitudinal direction.

[0089] The rest of the structure and configuration of this embodiment are the same as those of Embodiment 1.

[0090] Example 3

[0091] The present embodiment is a shock-absorbing blasting structure adjacent to a wired tunnel. The difference between the present embodiment and embodiment 1 is that, in the present embodiment, the length of the airbag II is set to 10 cm; the length of the airbag II can well make the charging of the groove eye at the bottom of the hole an uncoupled structure, while reducing the blasting vibration velocity in the longitudinal direction.

[0092] The rest of the structure and configuration of this embodiment are the same as those of Embodiment 1.

[0093] Example 4

[0094] A blasting construction method for a shock-absorbing blasting structure adjacent to a wired tunnel comprises the following steps:

[0095] S1. Hole arrangement: according to the vibration reduction blasting structure of the adjacent wired tunnel of Example 1, blast holes are arranged on the tunnel section, including groove holes, top pressure holes, bottom plate holes, inner circle holes, peripheral holes and blasting vibration reduction holes;

[0096] S2. Charge: explosive components are installed on the cutout holes, top pressure holes, bottom plate holes, inner circle holes, and peripheral holes, and an explosive component is installed on one of the blasting shock-absorbing holes;

[0097] S3. Laying out uncoupled charge structure: Laying out uncoupled charge structure in the two groups of symmetrically arranged groove holes 1 section near the blasting shock-absorbing hole 1.5 section, wherein air bag II is arranged in the hole bottom of the groove hole 1 section, and self-adhesive roll material I is arranged on the side of the groove hole 1 section close to the building;

[0098] S4, staged detonation: the cutout holes, top pressure holes, bottom plate holes, inner circle holes, and peripheral holes are all detonated stage by stage, such as Figure 1As shown in the figure, the numbers of the installation section marks are detonated in order from small to large. First, the 1st section of the groove hole is detonated, followed by the 1.5th section of the blasting damping hole. Then, the upper group of groove holes and the lower group of groove holes are detonated in sections from bottom to top in the form of an inverted "Z", that is, the 1st section of the groove hole, the 2nd section of the groove hole, the 3rd section of the groove hole, the 4th section of the groove hole, the 5th section of the groove hole, the 6th section of the groove hole, the 7th section of the groove hole, the 8th section of the groove hole, and the 9th section of the groove hole are detonated in sequence. The first step is to detonate the 9th section of the hole, the 10th section of the groove hole, the 11th section of the groove hole, and the 12th section of the groove hole. Then the 13th section of the inner circle hole, the 14th section of the peripheral hole, the 15th section of the bottom plate hole, and the 16th section of the bottom plate hole are detonated in sequence. Then the 17th section of the top pressure hole, the 18th section of the top pressure hole, and the 19th section of the top pressure hole are detonated in sequence. Then the 20th section of the inner circle hole is detonated, and then the 21st section of the peripheral hole and the 22nd section of the peripheral hole are detonated in sequence, thereby completing the blasting construction of the shock-absorbing blasting structure of the adjacent wired tunnel.

[0099] In this embodiment, in step S4, the blasting time difference of each section detonation is 40ms. This blasting time difference can make the blastholes in other sections play the role of shock-absorbing holes at the same time, and the blastholes that are blasted immediately afterwards can also crush the rock mass thrown out by the blastholes that were blasted earlier again, which can well reduce the rock mass block diameter and avoid secondary blasting of the blastholes.

[0100] In this embodiment, in step S3, the self-adhesive coil is a foam self-adhesive coil. By arranging the foam self-adhesive coil on the side of the cutout 1 close to the structure, the lateral charge structure of the cutout is uncoupled charge, thereby reducing the vibration velocity propagating into the surrounding rock and reducing the blasting vibration velocity in the lateral direction.

[0101] The present embodiment provides a blasting construction method for a shock-absorbing blasting structure adjacent to a wired tunnel. Since each blast hole is detonated in sections, and the low-section blast holes are detonated first and then the high-section blast holes, the high-section blast holes also serve as shock-absorbing holes for the low-section blast holes, and the blasting shock-absorbing holes also serve as shock-absorbing holes for the first section of a group of slot holes below. By crushing the rock mass thrown out during the blasting of the slot holes again and reducing the rock mass block diameter, it is possible to prevent the need for secondary blasting of the slot holes, reduce the total amount of explosives in a single section of the slot holes, reduce the vibration velocity on the blasting propagation path, ensure the safety of nearby buildings, reduce construction difficulty and construction costs, and improve construction efficiency.

[0102] Example 5

[0103] The present embodiment is a blasting construction method for a shock-absorbing blasting structure adjacent to a wired tunnel. The difference between the present embodiment and the embodiment 4 is that in the present embodiment, in the S4 segmented detonation step, the blasting time difference of each segment detonation is 30ms; the blasting time difference can make the blastholes in other segments simultaneously play the role of shock-absorbing holes, and the blastholes that are blasted immediately afterwards can also crush the rock mass thrown out by the blastholes that were blasted earlier during the blasting, which can well reduce the rock mass block diameter and avoid secondary blasting of the blastholes. In the present embodiment, in step S3, the self-adhesive coil is a plastic self-adhesive coil. By arranging a plastic self-adhesive coil on the side of the cutout eye 1 close to the structure, the lateral charge structure of the cutout eye is an uncoupled charge, thereby reducing the vibration velocity propagating into the surrounding rock and reducing the blasting vibration velocity in the lateral direction.

[0104] The remaining steps and settings of this embodiment are the same as those of Embodiment 4.

[0105] Example 6

[0106] The present embodiment is a blasting construction method for a shock-absorbing blasting structure adjacent to a wired tunnel. The difference between the present embodiment and embodiment 4 is that, in the present embodiment, in the S4 segmented detonation step, the blasting time difference of each segment detonation is 50ms; the blasting time difference can make the blast holes in other segments simultaneously act as shock-absorbing holes, and the blast holes blasted immediately afterwards can also crush the rock mass thrown out by the blast holes blasted previously again, which can well reduce the rock mass block diameter and avoid secondary blasting of the blast holes.

[0107] The remaining steps and settings of this embodiment are the same as those of Embodiment 4.

[0108] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A shock-absorbing blasting structure near a wired tunnel, characterized in that: It includes a tunnel section and blast holes arranged in the tunnel section, wherein the blast holes include a groove hole, a top pressure hole, a bottom plate hole, an inner circle hole, a peripheral hole and a blasting shock-absorbing hole; The peripheral eye is arranged in an arc shape at the outermost side of the tunnel section, and the inner circle eye is arranged in an arc shape at the inner side of the peripheral eye; The bottom plate eye is arranged in a horizontal straight line at the bottom of the tunnel section, and the top pressure eye is arranged in a horizontal straight line in several sections at the upper part of the tunnel section and placed on the inner side of the inner circle eye; The cutout holes are arranged in a longitudinal straight line in a plurality of groups in the middle of the tunnel section and are placed between the capping holes and the bottom plate holes; The plurality of groups of the groove holes include left-side groove holes and right-side groove holes which are bilaterally symmetrical, and the blasting shock-absorbing holes are arranged in a longitudinal straight line between the left-side groove holes and the right-side groove holes; The groove holes, top pressure holes, bottom plate holes, inner circle holes and peripheral holes are all provided with explosive components; one of the blasting shock-absorbing holes is provided with an explosive component.

2. A shock-absorbing blasting structure adjacent to a wired tunnel as claimed in claim 1, characterized in that: There are four blasting shock absorbing holes, and one of the blasting shock absorbing holes is provided with the explosive assembly.

3. The shock-absorbing blasting structure adjacent to a wired tunnel as claimed in claim 1, characterized in that: The left-side cutout eyes and the right-side cutout eyes are both provided with an upper group of cutout eyes and a lower group of cutout eyes, and the upper group of cutout eyes and the lower group of cutout eyes are both provided with a plurality of sections of cutout eyes in a longitudinal straight line form.

4. The shock-absorbing blasting structure adjacent to a wired tunnel as claimed in claim 1, characterized in that: The capping eye comprises five capping eyes arranged in a transverse straight line, wherein four capping eyes are arranged symmetrically on the left and right sides in pairs, and another capping eye is arranged on the upper part of the four capping eyes and placed in the top middle position of the tunnel section.

5. The shock-absorbing blasting structure adjacent to a wired tunnel as claimed in claim 1, characterized in that: The explosive assembly includes an electronic detonator arranged in the blast hole.

6. The shock-absorbing blasting structure adjacent to a wired tunnel as claimed in claim 3, characterized in that: The first section of the grooved eyes in the lower group of grooved eyes close to the blasting shock-absorbing hole is an uncoupled charging structure, an air bag is arranged in the bottom of the hole of the first section of the grooved eyes, and a self-adhesive coil is arranged on the side of the first section of the grooved eyes close to the building.

7. A shock-absorbing blasting structure adjacent to a wired tunnel as claimed in claim 6, characterized in that: The length of the airbag is set to 5cm to 10cm; and / or The first section of the cutout hole is in the same horizontal position as the blasting shock absorbing hole; and / or The depth of the blasting shock-absorbing hole is half the depth of the first section of the cutout hole.

8. A blasting construction method for a shock-absorbing blasting structure adjacent to a wired tunnel according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Hole arrangement: according to the shock-absorbing blasting structure of the adjacent wired tunnel, blast holes are arranged on the tunnel section, including groove holes, top pressure holes, bottom plate holes, inner circle holes, peripheral holes and blasting shock-absorbing holes; S2. Charge: explosive components are installed on the cutout holes, top pressure holes, bottom plate holes, inner circle holes, and peripheral holes, and an explosive component is installed on one of the blasting shock-absorbing holes; S3. Laying out the uncoupled charge structure: Laying out the uncoupled charge structure in the first section of the two groups of lower grooves symmetrically arranged near the blasting shock-absorbing holes, wherein an air bag is arranged in the bottom of the first section of the grooves, and a self-adhesive roll is arranged on the side of the first section of the grooves close to the building; S4. Segmental detonation: The grooved eyes, capping eyes, bottom plate eyes, inner circle eyes and peripheral eyes are all detonated in segments. First, the first segment of the lower group of grooved eyes is detonated, and then the shock-absorbing holes are detonated. Then, the upper group of grooved eyes and the lower group of grooved eyes are detonated in segments from bottom to top in the form of an inverted "Z". Then, the two symmetrical segments at the bottom of the inner circle eye, the two symmetrical segments at the bottom of the peripheral eye, the middle segment of the bottom plate eye, and the two side segments of the bottom plate eye are detonated respectively. Then, multiple segments of the capping eyes are detonated from bottom to top, and then the upper segment of the inner circle eye is detonated, and then the two symmetrical segments in the middle of the peripheral eye are detonated, and then the upper segment of the peripheral eye is detonated, thereby completing the blasting construction of the shock-absorbing blasting structure adjacent to the wired tunnel.

9. A blasting construction method for a shock-absorbing blasting structure adjacent to a wired tunnel as claimed in claim 8, characterized in that: In the S4 segmented detonation step, the blasting time difference of each segment detonation is 30ms to 50ms.

10. A blasting construction method for a shock-absorbing blasting structure adjacent to a wired tunnel as claimed in claim 8, characterized in that: In the step S3, the self-adhesive coil is a foam or plastic self-adhesive coil.

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