A construction method and initiation method of a multi-hole double helix slotting

Abstract

The application discloses a kind of multi-hole double helix cut construction method and detonation method, wherein the multi-hole double helix cut construction method obtained by multi-hole double helix cut is in the face of 3.3 meters above deep hole excavation blasting, when the hard rock of pratt coefficient is greater than 12, the first initiation hole, the third initiation hole, the fifth initiation hole and the eighth initiation hole, the second initiation hole, the fourth initiation hole, the sixth initiation hole and the seventh initiation hole are respectively arranged in the state of double helix around the first hole, and a plurality of holes are arranged at a specific position, to improve the free surface width and the cavity volume formed after blasting, to improve the blasting conditions for subsequent initiation holes, and to improve the cut effect without increasing the amount of medicine, thereby realizing efficient excavation of hard rock roadway, and ensuring the construction progress and production efficiency of the roadway.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of roadway construction initiation, in particular to a construction method and initiation method of multi-hole double spiral slotting. BACKGROUND

[0002] The information provided in this section is for the purpose of generally presenting the background of the disclosure. To the extent that the descriptions in this section deviate from the presently ascribed inventor's own developments, descriptions as attributed to a given source should not be regarded as adopted by the inventor to the exclusion of other sources or other aspects of the description. In this section, work by the current named inventors and others is described to present a context for the present disclosure. To the extent that specific documents can be cited in this section, they can be too recent to have been considered by the inventors, and they are here cited for their pertinent teachings only.

[0003] Roadway tunneling technology plays an important role in underground engineering construction, mountain tunnel engineering, ore mining and other engineering construction. In order to facilitate construction, a large amount of roadway tunneling work will be carried out, and the efficiency of roadway tunneling affects the progress of the whole project. Therefore, improving the efficiency of tunneling is the key to improving the speed of engineering construction. The efficiency of slotting largely determines the efficiency of tunneling. With the continuous development of manufacturing industry, rock drilling equipment is also constantly updated, but the application prospect of slotting blasting technology in drill-and-blast method tunneling is still very broad.

[0004] In the traditional spiral slotting, for hard rock with a Protodyakonov coefficient greater than 12, in order to obtain a better slotting effect, the hole spacing of the traditional spiral slotting is very small, which reduces the volume of the formed cavity, and more explosive is needed to form the same slot cavity volume. At the same time, in deep hole blasting, compacted rock slag is easily left in the slot after slotting blasting, which affects the blasting effect of the auxiliary hole and further affects the efficiency of the blasting tunneling. SUMMARY

[0005] In view of the defects in the prior art, the present application provides a construction method and initiation method of multi-hole double spiral slotting to solve the problems of poor blasting tunneling effect and low efficiency under the slotting arrangement in the prior art.

[0006] The above-mentioned purposes of the present application are mainly achieved by the following technical solutions:

[0007] A construction method of multi-hole double spiral slotting, the construction method comprising:

[0008] constructing a first hole at the center of the working area;

[0009] symmetrically constructing a first initiation hole and a second initiation hole at a position with a distance of 2a from the center of the first hole;

[0010] constructing a fourth initiation hole at a distance of m from the foot of the perpendicular line passing through the center of the first hole and the center of the second initiation hole, and constructing a second hole at a distance of m+n from the foot of the perpendicular line;

[0011] On the perpendicular line between the center of the second hole and the center of the first detonation hole, the sixth detonation hole is constructed at a distance of m from the foot of the perpendicular, and the third hole is constructed at a distance of m+n from the foot of the perpendicular.

[0012] On the line connecting the center of the third hole and the center of the first detonation hole, take the foot of the perpendicular from the center of the first detonation hole at a distance k. The seventh detonation hole is constructed by taking the length of the line connecting the foot of the perpendicular.

[0013] For the fourth detonation hole, the sixth detonation hole, the seventh detonation hole, the second void, and the third void, the third detonation hole, the fifth detonation hole, the eighth detonation hole, the fourth void, and the fifth void are constructed symmetrically with the first void as the center.

[0014] Furthermore, the distance between the center of the first hole and the first detonation hole and the second detonation hole is within the range of: 150mm < 2a < 200mm.

[0015] Furthermore, the distance between the line connecting the center of the first blast hole and the center of the second detonation hole and the center of the second blast hole is 400mm. <n+m<600mm。

[0016] Furthermore, the distance between the center of the fourth detonation hole and the line connecting the center of the first empty hole and the center of the second detonation hole, and the distance between the center of the fourth detonation hole and the center of the second empty hole, are related as follows: m = 2n.

[0017] Furthermore, the length of the line connecting the center of the third hole and the center of the first detonation hole is three times the distance k.

[0018] Based on the same inventive concept, this application also provides a detonation method for a multi-hole double-helix groove, wherein detonation is performed on the multi-hole double-helix groove obtained by the above construction method, and the detonation method includes the following steps:

[0019] Explosives and stemming material are sequentially filled into the fifth, sixth, seventh, and eighth detonation holes from the bottom to the opening.

[0020] The first detonation hole, the second detonation hole, the third detonation hole, and the fourth detonation hole are sequentially divided into lower and upper sections from the bottom to the opening, and explosives and stemming material are respectively filled into the lower and upper sections from bottom to top.

[0021] For the explosives in the first detonation hole, the second detonation hole, the third detonation hole, and the fourth detonation hole, a slight differential interval is set in the hole for detonation;

[0022] For the explosives in the fifth, sixth, seventh, and eighth detonation holes, a slight differential interval is set between the holes for detonation.

[0023] Furthermore, when detonating the first detonating hole, the second detonating hole, the third detonating hole, and the fourth detonating hole, the upper and lower sections of the first and second detonating holes are detonated first, and then the upper and lower sections of the third and fourth detonating holes are detonated.

[0024] Furthermore, the upper section of the first detonation hole, the upper section of the second detonation hole, the lower section of the first detonation hole, the lower section of the second detonation hole, the upper section of the third detonation hole, the upper section of the fourth detonation hole, the lower section of the third detonation hole, and the lower section of the fourth detonation hole are detonated sequentially.

[0025] Furthermore, when detonating the first detonating hole, the second detonating hole, the third detonating hole, and the fourth detonating hole, the upper sections of the first detonating hole, the second detonating hole, the third detonating hole, and the fourth detonating hole are detonated sequentially first, and then the lower sections of the first detonating hole, the second detonating hole, the third detonating hole, and the fourth detonating hole are detonated sequentially.

[0026] Furthermore, the inter-hole spacing has a micro-difference of 20ms to 100ms.

[0027] Compared with the prior art, the advantages of this application are:

[0028] The construction method of the multi-hole double-helix grooving method in this application involves first constructing a first hole at the center of the work area. Then, symmetrically constructing a first detonating hole and a second detonating hole at a distance 2a from the center of the first hole. Next, on the perpendicular bisector of the center of the first hole and the center of the second detonating hole, constructing a fourth detonating hole at a distance m from the foot of the perpendicular. Constructing a second hole at a distance m+n from the foot of the perpendicular. On the perpendicular bisector of the center of the second hole and the center of the first detonating hole, constructing a sixth detonating hole at a distance m from the foot of the perpendicular. Constructing a third hole at a distance m+n from the foot of the perpendicular. On the line connecting the center of the third hole and the center of the first detonating hole, taking a perpendicular k from the center of the first detonating hole, constructing a seventh detonating hole at a distance equal to the length of the connecting line. The fourth, sixth, and seventh detonating holes are then compared with the second hole. The first hole and the third hole are respectively symmetrically constructed with the third, fifth, eighth, fourth, and fifth detonating holes as the center, completing the construction of a multi-hole double-helix slotting. In the blasting of deep holes over 3.3 meters, for hard rock with a Protodyakonov coefficient greater than 12, the first, third, fifth, and eighth detonating holes, the second, fourth, sixth, and seventh detonating holes are arranged in a double-helix pattern around the first hole, and multiple holes are correspondingly arranged at specific positions. This increases the width of the free surface and the volume of the slot after blasting, providing better blasting conditions for subsequent detonating holes. In this way, the slotting effect is improved without increasing the amount of explosives, thereby achieving efficient excavation of hard rock tunnels and ensuring the tunnel construction progress and production efficiency. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic flowchart illustrating the construction method provided in the embodiments of this application;

[0031] Figure 2 A schematic flowchart illustrating the detonation method provided in this application embodiment;

[0032] Figure 3 This is a top view of a multi-hole double-helix groove provided in an embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the spatial structure of the multi-hole double helix groove provided in an embodiment of this application;

[0034] Figure 5This is a schematic diagram showing the positional relationship of the multi-hole double helix groove provided in an embodiment of this application;

[0035] In the diagram: 101, first hole; 102, second hole; 103, third hole; 104, fourth hole; 105, fifth hole; 201, first detonation hole; 202, second detonation hole; 203, third detonation hole; 204, fourth detonation hole; 205, fifth detonation hole; 206, sixth detonation hole; 207, seventh detonation hole; 208, eighth detonation hole; 301, explosive; 302, stemming material. Detailed Implementation

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are merely for describing exemplary embodiments of the invention. However, the invention can be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0037] Figure 1 This is a schematic flowchart of the construction method provided in the embodiments of this application. Figure 2 This is a schematic flowchart of the detonation method provided in an embodiment of this application. Figure 3 This is a top view of the multi-hole double-helix slot provided in the embodiment of this application. Figure 4 This is a schematic diagram of the spatial structure of the multi-hole double-helix groove provided in an embodiment of this application. Figure 5 This is a schematic diagram showing the positional relationship of the multi-hole double spiral groove provided in an embodiment of this application.

[0038] like Figure 1 , Figure 3 As shown, a construction method for multi-hole double-helix grooving is provided. In some embodiments, the construction method includes:

[0039] In the construction of the first void in the center of the work area: 101;

[0040] The first detonation hole 201 and the second detonation hole 202 are constructed symmetrically at a position 2a away from the center of the first hole diagram: 101.

[0041] In the first hole diagram: on the perpendicular line between the center of 101 and the center of the second detonation hole 202, the fourth detonation hole 204 is constructed at a distance of m from the foot of the perpendicular, and the second hole 102 is constructed at a distance of m+n from the foot of the perpendicular.

[0042] On the perpendicular line between the center of the second hole 102 and the center of the first detonation hole 201, the sixth detonation hole 206 is constructed at a distance of m from the foot of the perpendicular, and the third hole 103 is constructed at a distance of m+n from the foot of the perpendicular.

[0043] On the line connecting the center of the third hole 103 and the center of the first detonation hole 201, take the foot of the perpendicular from the center of the first detonation hole 201 at a distance k. Then, construct the seventh detonation hole 207 by taking the length of the line connecting the foot of the perpendicular.

[0044] For the fourth detonation hole 204, the sixth detonation hole 206, the seventh detonation hole 207, the second void 102, and the third void 103, the third detonation hole 203, the fifth detonation hole 205, the eighth detonation hole 208, the fourth void 104, and the fifth void 105 are constructed symmetrically with 101 in the first void diagram as the center.

[0045] To facilitate positioning, auxiliary marking and measuring tools can be used to mark lines, measure, and position the work area, maintaining the accuracy of the construction of empty holes and detonation holes.

[0046] In some embodiments, the working principle of the multi-hole double-helix grooving construction method of this application is as follows: First, construct the first hole diagram: 101 at the center of the working area. Then, construct the first detonation hole 201 and the second detonation hole 202 symmetrically at a distance 2a from the center of the first hole diagram: 101. Next, construct the fourth detonation hole 204 on the perpendicular bisector of the center of the first hole diagram: 101 and the center of the second detonation hole 202, taking a distance m from the foot of the perpendicular. Finally, construct the second hole 10 at a distance m+n from the foot of the perpendicular. 2. On the perpendicular line between the center of the second hole 102 and the center of the first detonation hole 201, construct the sixth detonation hole 206 at a distance m from the foot of the perpendicular. Construct the third hole 103 at a distance m+n from the foot of the perpendicular. On the line connecting the center of the third hole 103 and the center of the first detonation hole 201, take the foot of the perpendicular at a distance k from the center of the first detonation hole 201. Construct the seventh detonation hole 207 at a distance equal to the length of the connecting line. For the fourth detonation hole 204, the sixth detonation hole 206, and the... Seven detonation holes 207, the second cavity 102, and the third cavity 103 are constructed symmetrically with the first cavity diagram 101 as the center, with the third detonation hole 203, the fifth detonation hole 205, the eighth detonation hole 208, the fourth cavity 104, and the fifth cavity 105 respectively, to complete the construction of multi-cavity double-helix slotting. In deep hole blasting of more than 3.3 meters, for hard rock with a Protodyakonov coefficient greater than 12, the first detonation hole 201, the third detonation hole 203, the fifth detonation hole 205, and the fifth cavity 105 are constructed symmetrically. Eight detonating holes 208, 202, 204, 206, and 207 are arranged in a double helix pattern around hole 101 in the first hole diagram, and multiple holes are arranged at specific locations to increase the width of the free surface and the volume of the cavity after blasting. This provides better blasting conditions for subsequent detonating holes, thereby improving the slotting effect without increasing the amount of explosives, and thus achieving efficient tunneling in hard rock, ensuring the tunnel construction progress and production efficiency.

[0047] like Figure 5 As shown, further, in some embodiments, in the first hole diagram: the distance range between the center of 101 and the first detonation hole 201 and the second detonation hole 202 is: 150mm < 2a < 200mm. When facing hard rock with a Protodyakonov coefficient greater than 12, under the premise of controlling the amount of blasting explosive 301 used, better blasting effect can be achieved.

[0048] Furthermore, in some embodiments, the distance between the line connecting the center of the first hole 101 and the center of the second detonation hole 202, and the center of the second hole 102, is 400mm. <n+m<600mm。

[0049] Furthermore, in some embodiments, the distance between the center of the fourth detonation hole 204 and the line connecting the center of the first hole 101 and the center of the second detonation hole 202 in the diagram, and the distance between the center of the fourth detonation hole 204 and the center of the second hole 102 are: m = 2n.

[0050] Furthermore, in some embodiments, the length of the line connecting the center of the third hole 103 and the center of the first detonation hole 201 is three times the distance k.

[0051] In actual operation, the following construction steps are performed:

[0052] In the construction of the first void in the center of the work area: 101, the inner diameter of 101 in the first void diagram is 90mm;

[0053] Symmetrically construct a first detonation hole 201 and a second detonation hole 202 with an inner diameter of 45mm at a position 160mm away from the center of the first hole diagram: 101.

[0054] In the first hole diagram: on the perpendicular line between the center of 101 and the center of the second detonation hole 202, a fourth detonation hole 204 with an inner diameter of 45mm is constructed at a distance of 380mm from the foot of the perpendicular, and a second hole 102 with an inner diameter of 45mm is constructed at a distance of 570mm from the foot of the perpendicular.

[0055] On the perpendicular line between the center of the second hole 102 and the center of the first detonation hole 201, a sixth detonation hole 206 with an inner diameter of 45mm is constructed at a distance of 380mm from the foot of the perpendicular, and a third hole 103 with an inner diameter of 45mm is constructed at a distance of 570mm from the foot of the perpendicular.

[0056] The distance between the center of the third hole 103 and the center of the first detonation hole 201 is measured to be 657mm. The foot of the perpendicular is taken at a distance of 219mm from the center of the first detonation hole 201. The seventh detonation hole 207 is constructed at a distance of 657mm from the foot of the perpendicular.

[0057] For the fourth detonation hole 204, the sixth detonation hole 206, the seventh detonation hole 207, the second cavity 102, and the third cavity 103, respectively, with 101 in the first cavity diagram as the center, the distance between the center of 101 in the first cavity diagram and the center of the fourth detonation hole 204 is measured. Then, the third detonation hole 203 is symmetrically constructed on the opposite side of 101 in the first cavity diagram. After measuring the distance between the center of 101 in the first cavity diagram and the center of the sixth detonation hole 206, the third detonation hole 203 is symmetrically constructed on the opposite side of 101 in the first cavity diagram. After measuring the distance between the center of hole 101 and the center of hole 207 in the first hole diagram, hole 205 is the fifth detonation hole. Hole 208 is then constructed symmetrically on the opposite side of hole 101 in the first hole diagram. Hole 208 is then constructed symmetrically on the opposite side of hole 102 in the first hole diagram. Hole 104 is then constructed symmetrically on the opposite side of hole 101 in the first hole diagram. Hole 105 is then constructed symmetrically on the opposite side of hole 101 in the first hole diagram.

[0058] like Figure 2 , Figure 4 As shown, based on the same inventive concept, this application also provides a detonation method for a multi-hole double-helix groove, wherein detonation is performed on the multi-hole double-helix groove obtained by the above construction method. In some embodiments, the detonation method includes the following steps:

[0059] Explosive 301 and stemming clay 302 are sequentially filled from the bottom to the opening in the fifth detonation hole 205, the sixth detonation hole 206, the seventh detonation hole 207 and the eighth detonation hole 208.

[0060] The first detonation hole 201, the second detonation hole 202, the third detonation hole 203 and the fourth detonation hole 204 are sequentially divided into lower and upper sections from the bottom to the opening, and explosive 301 and stemming clay 302 are respectively filled into the lower and upper sections from bottom to top.

[0061] For the explosives 301 in the first detonation hole 201, the second detonation hole 202, the third detonation hole 203 and the fourth detonation hole 204, a slight differential interval is set in the hole for detonation;

[0062] For the explosives 301 in the fifth detonation hole 205, the sixth detonation hole 206, the seventh detonation hole 207 and the eighth detonation hole 208, a slight differential interval is set between the holes for detonation.

[0063] It should be noted that the length of the 302 tamping material should not be less than 300mm.

[0064] Furthermore, in some embodiments, when detonating the first detonation hole 201, the second detonation hole 202, the third detonation hole 203, and the fourth detonation hole 204, the upper and lower sections of the first detonation hole 201 and the second detonation hole 202 are detonated first, and then the upper and lower sections of the third detonation hole 203 and the fourth detonation hole 204 are detonated.

[0065] Furthermore, in some embodiments, the upper section of the first detonating hole 201, the upper section of the second detonating hole 202, the lower section of the first detonating hole 201, the lower section of the second detonating hole 202, the upper section of the third detonating hole 203, the upper section of the fourth detonating hole 204, the lower section of the third detonating hole 203, and the lower section of the fourth detonating hole 204 are detonated sequentially. By employing staggered detonation in the first detonating hole 201, the second detonating hole 202, the third detonating hole 203, and the fourth detonating hole 204, a better blasting effect can be obtained.

[0066] Furthermore, in some embodiments, when detonating the first detonating hole 201, the second detonating hole 202, the third detonating hole 203, and the fourth detonating hole 204, the upper sections of the first detonating hole 201, the second detonating hole 202, the third detonating hole 203, and the fourth detonating hole 204 are detonated sequentially first, and then the lower sections of the first detonating hole 201, the second detonating hole 202, the third detonating hole 203, and the fourth detonating hole 204 are detonated in separate groups through the upper and lower sections of the first detonating hole 201, the second detonating hole 202, the third detonating hole 203, and the fourth detonating hole 204, to achieve a stable and reliable blasting objective.

[0067] Furthermore, in some embodiments, the inter-hole spacing difference is 20ms to 100ms.

[0068] In actual operation, the following detonation steps are performed:

[0069] Explosive 301 is first filled into the bottom of the fifth detonation hole 205, the sixth detonation hole 206, the seventh detonation hole 207 and the eighth detonation hole 208 respectively, and 400mm of stemming clay 302 is filled on the explosive 301 up to the hole opening.

[0070] The first detonation hole 201, the second detonation hole 202, the third detonation hole 203 and the fourth detonation hole 204 are sequentially divided into a lower section and an upper section from the bottom of the hole to the opening. First, explosive 301 is loaded at the bottom of the lower section, and then 400mm of stemming clay 302 is loaded on the explosive 301 to complete the lower section loading. Then, explosive 301 and 400mm of stemming clay 302 are loaded to complete the upper section loading.

[0071] With a detonation interval of 70ms, the upper section of the first detonation hole 201, the upper section of the second detonation hole 202, the lower section of the first detonation hole 201, the lower section of the second detonation hole 202, the upper section of the third detonation hole 203, the upper section of the fourth detonation hole 204, the lower section of the third detonation hole 203, and the lower section of the fourth detonation hole 204 are detonated sequentially.

[0072] With a detonation interval of 50ms, the explosive 301 in the fifth detonation hole 205, the sixth detonation hole 206, the seventh detonation hole 207 and the eighth detonation hole 208 are detonated to complete the multi-hole double helical slotting operation.

[0073] In actual operations, the following detonation steps can also be used:

[0074] Explosive 301 is first filled into the bottom of the fifth detonation hole 205, the sixth detonation hole 206, the seventh detonation hole 207 and the eighth detonation hole 208 respectively, and 400mm of stemming clay 302 is filled on the explosive 301 up to the hole opening.

[0075] The first detonation hole 201, the second detonation hole 202, the third detonation hole 203 and the fourth detonation hole 204 are sequentially divided into a lower section and an upper section from the bottom of the hole to the opening. First, explosive 301 is loaded at the bottom of the lower section, and then 400mm of stemming clay 302 is loaded on the explosive 301 to complete the lower section loading. Then, explosive 301 and 400mm of stemming clay 302 are loaded to complete the upper section loading.

[0076] With a detonation interval of 60ms, the upper section of the first detonation hole 201, the upper section of the second detonation hole 202, the lower section of the first detonation hole 201, the lower section of the second detonation hole 202, the upper section of the third detonation hole 203, the upper section of the fourth detonation hole 204, the lower section of the third detonation hole 203, and the lower section of the fourth detonation hole 204 are detonated sequentially.

[0077] With a detonation interval of 30ms, the explosive 301 in the fifth detonation hole 205, the sixth detonation hole 206, the seventh detonation hole 207 and the eighth detonation hole 208 are detonated to complete the multi-hole double helical slotting operation.

[0078] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of the invention.

[0079] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0080] It should be understood that in the description of this invention, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship as commonly placed when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0081] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0082] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0083] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.

[0084] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0085] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

Claims

1. A construction method for multi-hole double-helix grooving, characterized in that, The construction method includes: Construct the first void in the center of the work area; The first detonation hole and the second detonation hole are constructed symmetrically at a distance of 2a from the center of the first hole; On the perpendicular line between the center of the first hole and the center of the second detonation hole, the fourth detonation hole is constructed at a distance of m from the foot of the perpendicular, and the second hole is constructed at a distance of m+n from the foot of the perpendicular. On the perpendicular line between the center of the second hole and the center of the first detonation hole, the sixth detonation hole is constructed at a distance of m from the foot of the perpendicular, and the third hole is constructed at a distance of m+n from the foot of the perpendicular. On the line connecting the center of the third hole and the center of the first detonation hole, take the foot of the perpendicular from the center of the first detonation hole at a distance k. The seventh detonation hole is constructed by taking the length of the line connecting the foot of the perpendicular. For the fourth detonation hole, the sixth detonation hole, the seventh detonation hole, the second void, and the third void, the third detonation hole, the fifth detonation hole, the eighth detonation hole, the fourth void, and the fifth void are constructed symmetrically with the first void as the center.

2. The construction method for multi-hole double-helix grooving as described in claim 1, characterized in that: The distance between the center of the first hole and the first detonation hole and the second detonation hole is within the range of: 150mm < 2a < 200mm.

3. The construction method for multi-hole double-helix grooving as described in claim 2, characterized in that: The distance between the line connecting the center of the first blast hole and the center of the second detonation hole and the center of the second blast hole is 400mm. <n+m<600mm。 4. The construction method for multi-hole double-helix grooving as described in claim 3, characterized in that: The distance between the center of the fourth detonation hole and the line connecting the center of the first hole and the center of the second detonation hole, and the distance between the center of the fourth detonation hole and the center of the second hole, are related as follows: m = 2n.

5. The construction method for multi-hole double-helix grooving as described in claim 4, characterized in that: The length of the line connecting the center of the third hole and the center of the first detonation hole is three times the distance k.

6. A detonation method for a multi-hole double-helix slotted design, characterized in that, Detonation is performed on the multi-hole double-helix groove obtained by any one of the construction methods described in claims 1-5, and the detonation method includes the following steps: Explosives and stemming material are sequentially filled into the fifth, sixth, seventh, and eighth detonation holes from the bottom to the opening. The first detonation hole, the second detonation hole, the third detonation hole, and the fourth detonation hole are sequentially divided into lower and upper sections from the bottom to the opening, and explosives and stemming material are respectively filled into the lower and upper sections from bottom to top. For the explosives in the first detonation hole, the second detonation hole, the third detonation hole, and the fourth detonation hole, a slight differential interval is set in the hole for detonation; For the explosives in the fifth, sixth, seventh, and eighth detonation holes, a slight differential interval is set between the holes for detonation.

7. The detonation method for multi-hole double-helix slotting as described in claim 6, characterized in that: When detonating the first detonating hole, the second detonating hole, the third detonating hole, and the fourth detonating hole, the upper and lower sections of the first and second detonating holes are detonated first, and then the upper and lower sections of the third and fourth detonating holes are detonated.

8. The detonation method for multi-hole double-helix slotting as described in claim 7, characterized in that: The upper section of the first detonation hole, the upper section of the second detonation hole, the lower section of the first detonation hole, the lower section of the second detonation hole, the upper section of the third detonation hole, the upper section of the fourth detonation hole, the lower section of the third detonation hole, and the lower section of the fourth detonation hole are detonated sequentially.

9. The detonation method for multi-hole double-helix slotting as described in claim 6, characterized in that: When detonating the first detonating hole, the second detonating hole, the third detonating hole, and the fourth detonating hole, the upper sections of the first detonating hole, the second detonating hole, the third detonating hole, and the fourth detonating hole are detonated in sequence first, and then the lower sections of the first detonating hole, the second detonating hole, the third detonating hole, and the fourth detonating hole are detonated in sequence.

10. The detonation method for multi-hole double-helix slotting as described in claim 6, characterized in that: The inter-hole spacing has a micro-difference of 20ms to 100ms.

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