CN112414238A - Mine blasting structure and blasting method thereof - Google Patents

Abstract

The utility model relates to a mine blasting structure and blasting method thereof belongs to mine blasting technical field, it includes the big gun hole, the big gun hole includes overburden and explosive layer from the top down in proper order, the explosive layer includes the bottom plate, circular arc board and cartridge, the one end and the bottom plate sliding connection of circular arc board, the circular arc board is equipped with a plurality ofly, a plurality of circular arc board circumference arrays form interior cylinder, be equipped with the drive arrangement that the drive circular arc board is close to each other or keeps away from between a plurality of circular arc boards and the bottom plate, be connected with the elastic plate between the adjacent circular arc board, the cartridge is located interior cylinder. The application has the effect of being convenient for adjust the clearance between explosive and the big gun hole.

Description

Mine blasting structure and blasting method thereof

Technical Field

The application relates to the technical field of mine blasting, in particular to a mine blasting structure and a blasting method thereof.

Background

At present, when carrying out coal mining, need explode the rock mass, current blasting mode need carry out the big gun hole earlier and arrange, fill the medicine, shutoff big gun hole, then explode, and the medicine directly laminates with the drilling wall, and when carrying out the ignition blasting, the impact that the cliff received is the most direct, and the energy consumption that a large amount of cliffs broken can make the blasting influences the transmission of blasting energy to influence blasting effect. In order to improve the blasting effect, the blasting is often carried out in a non-coupling loading mode, wherein the non-coupling loading mode refers to that the diameter of an explosive is smaller than that of a blast hole, and a gap is reserved between the explosive and the blast hole. When the coupled explosive charging explosion is not carried out, the detonation wave is transmitted to rock on the hole wall through an air medium, the air gap can store (part of) gas product energy at the initial stage of the detonation just like an air cushion, the initial pressure peak value acting on a blast hole is weakened, then the air cushion is pressed to release a large amount of stored energy to do work, and the acting time of the detonation gas product is prolonged, so that the blasting effect is improved.

At present, the existing chinese patent with reference to publication No. CN107024157A discloses a blasting charge structure, which includes a top cover and a bottom plate, a structure body is arranged between the top cover and the bottom plate, the structure body is a double-ring structure, the inner ring and the outer ring are fixed by a vertical partition plate, and the cartridge is placed in the inner ring of the structure body. In the related art, the cartridge is placed in the inner ring, so that a gap is reserved between the cartridge and the inner wall of the blast hole, and non-coupling charging is realized.

In view of the above-mentioned related art, the inventor believes that there is a defect that the diameter of the inner circular ring is fixed, and the gap between the inner circular ring and the inner wall of the blast hole cannot be adjusted as required.

Disclosure of Invention

In order to facilitate adjustment of a gap between an explosive and a blast hole, the application provides a mine blasting structure and a blasting method thereof.

In a first aspect, the mine blasting structure provided by the application adopts the following technical scheme:

the utility model provides a mine blasting structure, includes the big gun hole, and the big gun hole includes overburden and explosive layer from the top down in proper order, and the explosive layer includes bottom plate, circular arc board and cartridge, and the one end and the bottom plate sliding connection of circular arc board, circular arc board are equipped with a plurality ofly, and a plurality of circular arc board circumference array form interior cylinder, are equipped with the drive arrangement that the drive circular arc board is close to each other or keeps away from between a plurality of circular arc boards and the bottom plate, are connected with the elastic plate between the adjacent circular arc board, and the cartridge is located interior cylinder.

By adopting the technical scheme, when the diameter of the blast hole is changed, the plurality of arc plates are driven to mutually approach or separate through the driving device so as to adjust the distance between the arc plates and the inner wall of the blast hole, thereby adjusting the distance between the explosive roll and the blast hole, on one hand, the explosive layer can be suitable for the blast holes with different diameters, the application range is enlarged, and the convenience in use is improved; on the other hand, the blasting effect is relevant with the distance that the cartridge is apart from between the big gun hole inner wall, through the distance between regulation cartridge and the big gun hole inner wall according to the blasting needs, more can the pertinence blasting to help the quantity of arranging the big gun hole more rationally, when having saved the blasting cost, can also improve the blasting effect.

In addition, the setting of elastic plate can guarantee that a plurality of circular arc boards are close to each other or when keeping away from, avoids keeping somewhere the gap between the adjacent circular arc board to help avoiding the explosive to drop from interior cylinder, reduce the waste of explosive, simultaneously, can avoid the downthehole water of big gun to get into and make the explosive inefficacy in the interior cylinder, improve blasting effect. In addition, the elastic plate can store partial energy at the initial stage of detonation, so that the initial pressure peak value acting on the blast hole is weakened, the acting time of detonation gas products is prolonged, and the blasting effect is improved.

Preferably, drive arrangement includes connecting rod, actuating lever and drive assembly, and the connecting rod is equipped with a plurality ofly, all is located the interior cylinder along the axis circumference array of interior cylinder, connecting rod and bottom plate sliding connection, a plurality of connecting rods and a plurality of circular arc board one-to-one and fixed connection, and the actuating lever is equipped with a plurality ofly, a plurality of actuating levers and a plurality of connecting rod one-to-one and fixed connection, and drive assembly is connected with the actuating lever.

Through adopting above-mentioned technical scheme, drive assembly makes the actuating lever slide, and the actuating lever slides and drives the connecting rod and slide to make connecting rod drive arc plate slide, with the distance between the adjacent arc plate of regulation, and then adjust the distance of arc plate apart from the big gun hole inner wall, be applicable to the blasting demand of difference.

Preferably, the driving assembly comprises a driving gear and a driven gear, the driven gear is coaxial with the inner cylinder and is rotatably connected with the bottom plate, a plurality of circular-arc-shaped waist-shaped holes are formed in the driven gear, the plurality of waist-shaped holes are arrayed along the circumference of the driven gear, one end, far away from the connecting rod, of the driving rod is inserted into each waist-shaped hole, and the driving gear bottom plate is rotatably connected with the driven gear in a meshed mode.

Through adopting above-mentioned technical scheme, rotate the driving gear, the driving gear rotates drive driven gear and rotates, and driven gear rotates and makes the actuating lever slide along circular-arc waist shape hole for the actuating lever is close to or keeps away from driven gear's axis, and the actuating lever removes the drive connecting rod and slides, with the distance between regulation circular arc board and the driven gear axis, and then the realization is to the regulation of the distance between circular arc board and the big gun hole inner wall. In addition, driven gear rotates, and a plurality of actuating levers of drive move simultaneously for a plurality of circular arc boards move simultaneously, and the distance that a plurality of circular arc boards removed is the same, guarantees the regularity of the inner cylinder that forms, makes the impact force of blasting more even, improves blasting effect.

Preferably, the periphery of the driving gear is provided with a circular angle ruler which is coaxial with the driving gear, and the driving gear is fixedly connected with an indicating needle.

Through adopting above-mentioned technical scheme, the driving gear rotates and drives the pointer and rotate, and the pointer rotates and changes the pilot position of pointer on the bevel protractor, through the instruction of pointer, is convenient for observe driving gear pivoted angle, calculates out the distance that the circular arc board removed through driving gear pivoted angle, and then can learn the interval between circular arc board and the big gun hole inner wall. Through the setting of pointer and bevel protractor, can learn the distance between the circular arc board and the big gun hole inner wall fast, convenience when improving the use.

Preferably, be equipped with a plurality of interval subassemblies in the interior cylinder, the interval subassembly includes baffle and support column, and the baffle inlays in interior cylinder with interior cylinder sliding connection, has seted up the guide cable hole on the baffle, and the support column is located the baffle bottom surface, and the support column top can be dismantled with the baffle and be connected, the top surface butt of bottom and adjacent baffle.

Through adopting above-mentioned technical scheme, when the cartridge is filled to the inside drum, at first, according to the distance between the adjacent cartridge, select the support column of suitable length, then be connected the back with support column and baffle bottom surface, with the interior cylinder of baffle slip-in, at this moment, the bottom and the bottom plate butt of support column, then throw in the cartridge in the inside drum, after throwing in to suitable height, continue to slide-in the baffle in the inside drum for the support column bottom is with the top surface butt of adjacent baffle, then throw in the cartridge in the inside drum again, make the cartridge be located the top surface of top baffle. Through the setting of baffle, realize discontinuous powder charge for separate through the air between the adjacent explosive cartridge, can save the explosive cartridge quantity when realizing the blasting effect, practice thrift the cost.

Preferably, an outer cylinder is arranged around the outer circumference of the inner cylinder, and the outer cylinder is fixedly connected with the bottom plate.

By adopting the technical scheme, the arrangement of the outer cylinder increases the stability of the inner cylinder by abutting the outer cylinder with the inner wall of the blast hole and ensures that the cartridge is positioned in the middle of the blast hole so as to better exert the blasting effect; on the other hand, the explosive cartridge in the inner cylinder is protected by the arrangement of the outer cylinder, so that the situation that water in the blast hole enters the inner cylinder is further prevented, the explosive cartridge is prevented from losing efficacy, and the blasting effect is improved.

Preferably, a plurality of abutting rods are fixedly connected to the circumferential surface of the outer cylinder, and the abutting rods are arrayed along the circumferential periphery of the outer cylinder.

Through adopting above-mentioned technical scheme, arrange the outer cylinder in the big gun downthehole back, the contact area of outer cylinder and big gun hole inner wall is reduced to butt pole and big gun hole inner wall butt to reduce the frictional force between outer cylinder and the big gun hole inner wall, increase the convenience when placing the outer cylinder in the big gun hole, improve work efficiency. In addition, the butt pole is along outer cylinder circumference evenly distributed, helps increasing the stability of butt pole when to the support of outer cylinder, reduces the condition that the outer cylinder rocked to improve the stability to the inner cylinder, make the cartridge be in the big gun hole intermediate position, improve the blasting effect.

Preferably, the abutting rod is connected with an extension rod in a sliding mode, and an adjusting assembly for adjusting the length of the extension rod is connected between the extension rod and the abutting rod.

Through adopting above-mentioned technical scheme, when the diameter grow of big gun hole, adjusting part adjusts the length that the extension bar stretches out the butt pole for the extension bar can with big gun hole inner wall butt, thereby can be applicable to the big gun hole of different diameters, make outer cylinder and interior cylinder be located the big gun hole homoenergetic of different diameters and keep stable state, improve application range.

Preferably, the adjusting component comprises an adjusting screw and an adjusting nut, the adjusting screw is rotatably connected with the abutting rod, the adjusting nut is in threaded connection with the adjusting screw, and the adjusting nut is fixedly connected with the extension rod.

Through adopting above-mentioned technical scheme, rotate adjusting screw, adjusting screw rotates drive adjusting nut and removes, and adjusting nut removes and drives the extension bar and removes to adjust the extension bar and stretch out the length of butt pole, thereby make extension bar and butt pole cooperation can make outer cylinder and interior cylinder be in the homoenergetic steady state when big gun hole of different diameters in.

In a second aspect, the present application provides a blasting method for a mine blasting structure, which adopts the following technical scheme:

a method of blasting a blast structure comprising the steps of:

s1, drilling a blast hole at a corresponding position as required;

s2: the length of the extension rod is adjusted according to the diameter of the blast hole, so that the extension rod is abutted against the inner wall of the blast hole;

s3: adjusting the distance between the adjacent circular arc plates as required, and adjusting the distance between the circular arc plates and the inner wall of the blast hole;

s4: determining the distance between adjacent partitions according to the charging scheme, thereby determining the length of a supporting column connected with each partition;

s5: loading the bottom partition plate into the inner cylinder, loading the explosive cartridge, enabling the detonating cord to extend out of the blast hole through the detonating cord hole, and then sequentially loading the partition plate and the explosive cartridge until the inner cylinder is filled;

s6: a gravel covering layer is covered on the inner cylinder.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the plurality of arc plates and the elastic plate are matched with the driving device, so that the diameter of the inner cylinder can be changed, the inner cylinder can be placed in blast holes with different diameters, and the application range is enlarged; in addition, according to the blasting demand, adjust the distance between interior cylinder and the big gun hole inner wall to can adjust the distance between cartridge and the big gun hole inner wall, be applicable to different blasting demands.

2. The setting of elastic plate not only can fill the clearance of circular arc board, reduces the explosive and leaks, can reduce the impact force that the rock was received to the partial energy storage of bombing initial stage simultaneously, and then reduces because of the energy consumption that a large amount of rock-wall breakage caused, improves the transmission effect of energy, and then improves blasting effect.

3. Driven gear and driving gear cooperation for a plurality of actuating levers remove simultaneously and adjust a plurality of circular arc boards with the while, guarantee that the distance that a plurality of circular arc boards removed is the same, thereby guarantee the regularity of the inner cylinder of formation, make the impact force of blasting more even, improve the blasting effect.

4. The setting of pointer and bevel protractor can learn the distance between circular arc board and the big gun hole inner wall fast, the convenience when improving the use.

5. The distance before the adjacent baffle can be adjusted as required to the setting of interval subassembly, realizes different interval powder charges for the cartridge is reasonable in distribution, practices thrift the explosive quantity, can improve the blasting effect when reducing the cost.

6. The setting of outer cylinder and butt-joint pole has increased the stability of inner cylinder to guarantee the stability of explosive cartridge, improve the blasting effect.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present application.

Fig. 2 is a schematic view of a hidden partial arc plate and an elastic plate, which is intended to show the structure of the driving device.

Fig. 3 is a partial structural schematic view intended to show the pointer and the angle ruler.

Fig. 4 is a schematic view intended to show the structure of the outer cylinder and the abutment rod.

Fig. 5 is a partially enlarged view of a portion a in fig. 4.

Description of reference numerals: 1. blast holes; 2. a cover layer; 3. a explosive layer; 31. bottom plate, 32, arc plate, 321, elastic plate; 322. a chute; 33. medicated rolls; 4. an energy storage ring; 41. an upper ring body; 411. an energy storage tank; 42. a lower ring body; 5. a drive device; 51. a connecting rod; 52. a drive rod; 53. a drive assembly; 531. a driving gear; 5311. a rotating plate; 5312. an indicator needle; 5313. an angle ruler; 532. a driven gear; 5321. a waist-shaped hole; 6. a spacer assembly; 61. a partition plate; 62. a support pillar; 7. an outer cylinder; 71. a butting rod; 711. a containing groove; 712. a communicating hole; 72. lengthening a rod; 8. an adjustment assembly; 81. adjusting the screw rod; 811. a first bevel gear; 812. a second bevel gear; 82. adjusting the nut; 9. a synchronization component; 91. a synchronizing wheel; 92. and (4) a synchronous belt.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a mine blasting structure. Combine fig. 1 and fig. 2, the blasting structure includes big gun hole 1, from the top down includes rubble overburden 2 in proper order in big gun hole 1, explosive layer 3 and energy storage ring 4, explosive layer 3 includes circular shape bottom plate 31, circular arc board 32 and explosive roll 33, bottom plate 31 and the coaxial setting of big gun hole 1, circular arc board 32 is coaxial with bottom plate 31, and circular arc board 32 bottom surface and bottom plate 31 butt and sliding connection, circular arc board 32 is equipped with a plurality ofly, circular arc board 32 is equipped with six in this implementation, and distribute along circular bottom plate 31's contour circumference, be equipped with the gliding drive arrangement 5 of drive circular arc board 32 between circular arc board 32 and the bottom plate 31. The elastic plates 321 made of rubber are connected between the adjacent circular arc plates 32, and the elastic plates 321 fill the space between the adjacent circular arc plates 32 and are fixedly connected with the circular arc plates 32. The circular arc plate 32 and the elastic plate 321 enclose a cylindrical inner cylinder, and the explosive roll 33 is placed in the inner cylinder.

During the blasting, in putting into blasthole 1 with energy storage ring 4, according to the diameter of blasthole 1, adjust circular arc board 32 for circular arc board 32 outer peripheral face is in suitable distance with 1 inner wall of blasthole, then puts into blasthole 1 with bottom plate 31 and circular arc board 32, and with energy storage ring 4 butt, later, in putting into circular arc board 32 with cartridge 33 and enclosing synthetic inner cylinder, at last, cover rubble overburden 2, explode cartridge 33 and explode.

Referring to fig. 2, the driving device 5 includes a connecting rod 51, a driving rod 52 and a driving assembly 53, the connecting rod 51 is horizontally disposed, the length direction of the connecting rod is the same as the radial direction of the bottom plate 31, six connecting rods 51 are disposed, the six connecting rods 51 correspond to six circular arc plates 32 one to one, and one end of each connecting rod 51 is fixedly connected to the circular arc plate 32. The number of the driving rods 52 is six, the driving rods 52 correspond to the six connecting rods 51 one by one, the driving rods 52 are fixedly connected with one ends, far away from the circular arc plate 32, of the connecting rods 51, and the driving rods 52 are vertically arranged in a cylindrical shape. The driving assembly 53 comprises a driving gear 531 and a driven gear 532, the driven gear 532 and the driving gear 531 are both located inside the inner cylinder, the driven gear 532 is coaxially arranged with the bottom plate 31 and is rotatably connected with the bottom plate 31, six kidney-shaped holes 5321 are formed in the driven gear 532, one end of each kidney-shaped hole 5321 is close to the axis of the driven gear 532, the other end of each kidney-shaped hole 5321 is close to the edge of the driven gear 532, the kidney-shaped holes 5321 are arc-shaped, the top end of the driving rod 52 is inserted into the kidney-shaped hole 5321, and the. The axis of the driving gear 531 is the same as the axis of the driven gear 532, and the driving gear 531 is rotatably connected to the base plate 31 via a rotating shaft, while the driving gear 531 is engaged with the driven gear 532.

Referring to fig. 3, the rotation shaft connected to the driving gear 531 penetrates through the inner cylinder and is fixedly connected to the rotation plate 5311, the rotation plate 5311 is coaxial with the driving gear 531, the rotation plate 5311 abuts against the bottom plate 31, and a sealing gasket is sleeved on the circumferential surface of the rotation shaft to prevent water from entering the inner cylinder. An angle ruler 5313 is arranged around the outer circumference of the rotating plate 5311, the angle ruler 5313 is fixedly connected with the bottom plate 31, and an indicating needle 5312 is fixedly connected to the circumferential surface of the rotating plate 5311 and used for indicating the rotating angle of the rotating plate 5311. The rotating plate 5311 is threadedly connected with a locking bolt 5314, and the locking bolt 5314 is threaded through the rotating plate 5311 and then tightly abutted against the bottom plate 31 to prevent the rotating plate 5311 from rotating.

When the distance of the circular arc plate 32 is adjusted, the locking bolt 5314 is released from fixing the rotating plate 5311, the rotating plate 5311 is rotated, the driving gear 531 drives the driven gear 532 to rotate, the driven gear 532 rotates, the driving rod 52 slides along the waist-shaped hole 5321, the driving rod 52 slides to drive the connecting rod 51 to drive the circular arc plate 32 to move, and the distance between the circular arc plate 32 and the inner wall of the blast hole 1 is adjusted. When the rotating plate 5311 is rotated, the rotating angle of the rotating plate 5311 is observed through the indicating needle 5312 and the angle ruler 5313, the distance between the arc plate 32 and the blast hole 1 can be obtained quickly without measurement, and the operation is convenient and quick.

Combine fig. 1 and fig. 3, be equipped with interval subassembly 6 in the interior cylinder, interval subassembly 6 is equipped with a plurality ofly along interior cylinder degree of depth interval, interval subassembly 6 includes baffle 61 and support column 62, baffle 61 is the circular platelike structure coaxial with interior cylinder, the periphery and the 32 inner wall butt of circular arc board of baffle 61, vertical spout 322 has been seted up to the 32 inner wall of circular arc board, spout 322 runs through the length of circular arc board 32, fixedly connected with slider on the periphery of baffle 61, the slider inlays in spout 322 with circular arc board 32 sliding connection. The partition 61 is provided with a fuse hole through which a fuse passes. The number of the support columns 62 is three, the length direction of the support columns is the same as the axial direction of the partition plate 61, the three support columns 62 are located below the partition plate 61 and distributed at intervals along the axial direction of the partition plate 61, and one end of each support column 62 is in threaded connection with the partition plate 61. Baffle 61 passes through the setting of support column 62 interval, realizes discontinuous powder charge, not only can rationally arrange cartridge 33 to reduce the explosive quantity.

With reference to fig. 1 and 4, the outer cylinder 7 is disposed around the inner cylinder, the bottom end of the outer cylinder 7 is fixedly connected to the top surface of the bottom, and a distance is left between the outer cylinder 7 and the inner cylinder. The circumferential surface of the outer cylinder 7 is fixedly connected with an abutting rod 71, and the length direction of the abutting rod 71 is the same as the radial direction of the outer cylinder 7. The abutting rods 71 are provided in plurality and are uniformly distributed along the axis of the outer cylinder 7 at intervals.

Referring to fig. 5, a containing groove 711 is formed in one side, away from the outer cylinder 7, of the abutting rod 71, an extension rod is embedded in the containing groove 711, the extension rod is slidably connected with the abutting rod 71, a communication hole 712 is formed in the top surface of the abutting rod 71, the length direction of the communication hole 712 is the same as that of the abutting rod 71, and the communication hole 712 is communicated with the containing groove 711. An adjusting component 8 for adjusting the length of the extension rod is connected between the extension rod and the abutting rod 71. The adjusting assembly 8 comprises an adjusting screw 81 and an adjusting nut 82, the adjusting screw 81 is horizontally arranged, the length direction of the adjusting screw is the same as that of the abutting rod 71, the adjusting screw 81 is located right above the communicating hole 712, and two ends of the adjusting screw are rotatably connected with the abutting rod 71 through rotating seats. The adjusting nut 82 is sleeved on the adjusting screw 81 and is in threaded connection with the adjusting screw 81, and the adjusting nut 82 is embedded in the communicating hole 712 and is fixedly connected with the extension bar 72.

Referring to fig. 5, a first bevel gear 811 is fixedly connected to the adjusting screw 81, the first bevel gear 811 is coaxial with the adjusting screw 81, a second bevel gear 812 is engaged with the first bevel gear 811, a supporting seat is rotatably connected to the second bevel gear 812, and the supporting seat is fixedly connected to the abutting rod 71. Be connected with synchronizing assembly 9 between a plurality of second bevel gears 812, synchronizing assembly 9 includes synchronizing wheel 91 and hold-in range 92, and synchronizing wheel 91 is equipped with a plurality ofly, respectively with a plurality of second bevel gears 812 one-to-one and fixed connection, and synchronizing wheel 91's axis direction is the same with the axis direction of outer cylinder 7, and hold-in range 92 cover is established in the periphery of outer cylinder 7 to mesh with a plurality of synchronizing wheel 91 simultaneously.

When the diameter of the blast hole 1 is changed, one of the adjusting screws 81 is rotated, and the adjusting screw 81 is rotated to drive the adjusting nut 82 to slide along the communicating hole 712, so that the extension rod slides, the length of the extension rod extending out of the containing groove 711 is adjusted, the abutting rod 71 is matched with the extension rod, and the outer cylinder 7 can be kept stable in different diameters. The synchronizing wheel 91 and the synchronizing belt 92 are engaged so that the plurality of extension rods move at the same moving distance, thereby ensuring that the end portions of the plurality of extension rods are the same as the axis of the outer cylinder 7, and ensuring that the outer cylinder 7 can be located at the intermediate position of the gun barrel.

Referring back to fig. 1, the energy storage ring 4 includes an upper ring body 41 and a lower ring body 42, the upper ring body 41 is located below the bottom plate 31, the upper ring body 41 is a cylindrical structure coaxial with the bottom plate 31, and the upper ring body 41 is hollow, and a top diameter of the upper ring body 41 is larger than a bottom diameter. An energy storage tank 411 is formed in the circumferential surface of the upper ring body 41, the energy storage tank 411 is annular, the cross section of the energy storage tank 411 is V-shaped, and the energy storage tank 411 is located at a position close to the lower portion of the upper ring body 41. The lower ring body 42 is located below the upper ring body 41 and is inserted into the upper ring body 41, the lower ring body 42 is located on the same axis as the upper ring body 41, the lower ring body 42 is hollow, and the diameter of the bottom of the lower ring body 42 is larger than that of the top of the lower ring body. The same energy storage tank 411 is arranged on the circumferential surface of the lower ring body 42, and the energy storage tank 411 is positioned at a position close to the top end of the lower ring body 42. The energy-gathering ring can completely break the rock at the bottom of the blast hole 1, so that the blasting effect is improved.

The implementation principle of the mine blasting structure in the embodiment of the application is as follows: firstly, after a blast hole 1 is drilled, the upper ring body 41 is inserted into the lower ring body 42 and is placed at the bottom of the blast hole 1; then, the adjusting screw 81 is turned to adjust the length of the extension bar 72 so that the distance from the end of the extension bar 72 to the axis of the outer cylinder 7 is the same as the radius of the blasthole 1; then, the rotating disc is rotated to enable the driving gear 531 to rotate to drive the driven gear 532, so that the driven gear 532 drives the driving rod 52 to move to adjust the arc plate 32, and therefore the distance between the arc plate 32 and the inner wall of the blast hole 1 is adjusted; then, the outer cylinder 7 is placed into the blast hole 1, and the partition plate 61 and the explosive cartridge 33 are sequentially placed into the inner cylinder until the inner cylinder is filled, and the detonating cord is made to extend out of the blast hole 1 through the detonating cord hole; finally, a gravel covering layer 2 is covered above the inner cylinder, and blasting is carried out through a detonating cord.

The embodiment of the application also discloses a blasting method of the mine blasting structure, which comprises the following steps:

s1: drilling a blast hole 1 at a corresponding position according to blasting requirements;

s2: after the energy gathering ring is placed at the bottom of the blast hole 1, the length of the extension rod 72 is adjusted through the adjusting assembly 8 according to the diameter of the blast hole 1, so that the end part of the extension rod 72 can be abutted against the inner wall of the blast hole 1;

s3: adjusting the position of the circular arc plate 32 according to the required distance between the circular arc plate 32 and the inner wall of the blast hole 1, so that the distance between the circular arc plate 32 and the inner wall of the blast hole 1 meets the requirement;

s4: placing the outer cylinder 7 into the blast hole 1, determining the length of the supporting column 62 according to the charging scheme, and fixedly connecting the supporting column 62 with the partition plate 61;

s5: a partition plate 61 is placed into the inner cylinder, then the explosive cartridge 33 is placed, the detonating cord extends out of the blast hole 1 through the detonating cord hole, and then the explosive cartridge 33 and the clapboard 61 are sequentially placed into the inner cylinder in the sequence until the inner cylinder is filled; completing charging;

s6: a gravel covering layer 2 is covered above the inner cylinder, and the detonating fuse is ensured to be positioned outside the blast hole 1.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. The utility model provides a mine blasting structure, includes big gun hole (1), and big gun hole (1) includes overburden (2) and explosive layer (3) from the top down in proper order, its characterized in that: explosive layer (3) are including bottom plate (31), arc board (32) and explosive roll (33), the one end and bottom plate (31) sliding connection of arc board (32), arc board (32) are equipped with a plurality ofly, a plurality of arc board (32) circumference array form interior cylinder, be equipped with drive arc board (32) between a plurality of arc boards (32) and bottom plate (31) and be close to each other or drive arrangement (5) of keeping away from, be connected with between adjacent arc board (32) elastic plate (321), explosive roll (33) are located interior cylinder.

2. The mine blasting structure of claim 1, wherein: drive arrangement (5) are including connecting rod (51), actuating lever (52) and drive assembly (53), connecting rod (51) are equipped with a plurality ofly, all be located the interior cylinder along the axis circumference array of interior cylinder, connecting rod (51) and bottom plate (31) sliding connection, a plurality of connecting rods (51) and a plurality of circular arc board (32) one-to-one and fixed connection, actuating lever (52) are equipped with a plurality ofly, a plurality of actuating levers (52) and a plurality of connecting rod (51) one-to-one and fixed connection, drive assembly (53) are connected with actuating lever (52).

3. A mine blasting structure as defined in claim 2, wherein: the driving assembly (53) comprises a driving gear (531) and a driven gear (532), the driven gear (532) is coaxial with the inner cylinder and is rotatably connected with the bottom plate (31), a plurality of circular-arc-shaped waist-shaped holes (5321) are formed in the driven gear (532), a plurality of waist-shaped holes (5321) are arrayed along the circumference of the driven gear (532), one end, far away from the connecting rod (51), of the driving rod (52) is inserted into the waist-shaped hole (5321), and the bottom plate (31) of the driving gear (531) is rotatably connected and is meshed with the driven gear (532).

4. The mine blasting structure of claim 1, wherein: the periphery of the driving gear (531) is provided with a circular angle ruler (5313) which is coaxial with the driving gear (531), and the driving gear (531) is fixedly connected with an indicating needle (5312).

5. The mine blasting structure of claim 1, wherein: be equipped with a plurality of interval subassemblies (six) in the interior cylinder, interval subassembly (six) are including baffle (61) and support column (62), and baffle (61) inlay in interior cylinder with interior cylinder sliding connection, have seted up the guide cable hole on baffle (61), and support column (62) are located baffle (61) bottom surface, and support column (62) top can be dismantled with baffle (61) and be connected, the top surface butt of bottom and adjacent baffle (61).

6. The mine blasting structure of claim 1, wherein: the outer cylinder (7) is arranged on the periphery of the inner cylinder, and the outer cylinder (7) is fixedly connected with the bottom plate (31).

7. The mine blasting structure of claim six, wherein: the circumferential surface of the outer cylinder (7) is fixedly connected with a plurality of abutting rods (71), and the abutting rods (71) are arrayed along the circumferential surface of the outer cylinder (7).

8. The mine blasting structure of claim 1, wherein: the length-adjusting mechanism is characterized in that an extension bar (72) is connected onto the abutting bar (71) in a sliding mode, and an adjusting assembly (8) for adjusting the length of the extension bar (72) is connected between the extension bar (72) and the abutting bar (71).

9. The mine blasting structure of claim 8, wherein: adjusting part (8) include adjusting screw (81) and adjusting nut (82), and adjusting screw (81) rotate with butt pole (71) and are connected, adjusting nut (82) and adjusting screw (81) threaded connection, adjusting nut (82) and extension bar (72) fixed connection.

10. A method of blasting in a blasting construction according to any of claims 1 to 9, comprising the steps of:

s1, drilling a blast hole (1) at a corresponding position according to the requirement;

s2: the length of the extension bar (72) is adjusted according to the diameter of the blast hole (1), so that the extension bar (72) is abutted against the inner wall of the blast hole (1);

s3: the distance between the adjacent circular arc plates (32) is adjusted as required, and the distance between the circular arc plates (32) and the inner wall of the blast hole (1) is adjusted;

s4: determining the distance between adjacent partitions (61) according to the charge scheme, thereby determining the length of the support column (62) connected by each partition (61);

s5: filling the bottom separator (61) into the inner cylinder, then filling the explosive cartridge (33), making the detonating cord extend out of the blast hole (1) through the detonating cord hole, and then sequentially filling the separator (61) and the explosive cartridge (33) until the inner cylinder is filled;

s6: a gravel covering layer (2) is covered on the upper part of the inner cylinder.

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