Plugging device suitable for blast holes at any angle in coal mine and using method

Abstract

The invention belongs to the technical field of coal mine deep blast hole plugging, and particularly relates to a plugging device suitable for any-angle blast holes in a coal mine and a using method.The plugging device comprises a table top, a receding groove is formed in the middle of one side wall of the table top, the bottom end of the table top is fixedly connected with the top ends of eight vertically-arranged supporting legs, and the bottom ends of the supporting legs are rotationally connected with universal wheels; the four supporting legs form a group, the two groups of supporting legs are symmetrically arranged on the two sides of the receding groove, the middle of the bottom end of the table top is fixedly connected with a driving part, the bottom end of the driving part is rotationally connected with a blast hole plugging mechanism, and the blast hole plugging mechanism is movably arranged in the receding groove; the blast hole plugging mechanism comprises a rotating sleeve, the bottom end of the rotating sleeve is rotationally connected with the bottom end of the driving part, a slurry supply part is arranged in the rotating sleeve, the bottom end of the slurry supply part fixedly communicates with a slurry storage part, the slurry storage part is fixedly arranged on one set of supporting legs, and the top end of the slurry supply part detachably communicates with a lengthening part. According to the invention, the blast hole with any inclination angle can be blocked.

Description

Technical Field

[0001] The invention belongs to the technical field of deep hole blasthole plugging in coal mines, and in particular relates to a plugging device suitable for blastholes at any angle in coal mines and a use method thereof. Background Art

[0002] As the depth of coal mining increases, the problem of rock control in deep mines becomes more and more prominent, and gradually becomes a key factor restricting efficient coal production. According to statistics, roof accidents in coal mine production have always ranked first among all types of coal mine accidents, accounting for as high as 44.5% of all types of coal mine accidents, which seriously restricts the safe and efficient production of modern mines. Under the condition of hard and thick roof, the roof collapses laggingly after coal seam mining, and when the roof is exposed for a certain length, it suddenly breaks and rotates, which is easy to form a "hurricane" in the limited space of the goaf, which has a certain impact on the surrounding rock and support equipment of the mining area, threatening the lives of underground workers. Since the coal mine rock mass is sedimentary rock, under the conditions of thick coal seam mining, the fracture disturbance height is large, and the lithology of sedimentary rocks is different, which easily forms a typical "large space mining field" environment, resulting in the appearance of mining pressure in the fully mechanized mining and fully mechanized caving working faces. The fracture of high-level rock strata has caused strong mining pressure in the mining field. In severe cases, earthquakes are triggered and people can clearly feel the tremors. Therefore, the mechanism of mining pressure in the mining field induced by the migration of high-level roof fractures needs to be analyzed urgently. The pre-splitting method of deep hole blasting in coal mines is an effective method to solve the control of high-level rock strata. It can break the key layer, destroy the integrity of the roof, and use the rock crushing and expansion characteristics to fill the goaf, reduce the height of the goaf, play a buffering role, and weaken the mining pressure. Deep hole blasting in coal mines refers to non-rockfall blasting carried out in coal seams and coal seam roofs to increase cracks in coal seams and coal seam roofs, using an advanced coal mining face with a drilling depth of not less than 20m (the distance from the goaf must not be less than 30m). Its advantages are that deep hole blasting consumes less explosive per unit and the explosive energy is evenly distributed inside the rock mass. During blasting, no matter the earthquake intensity, flying rock distance or the influence range of air shock waves are smaller than those of general blasting, and the safety technology is good. The hundred-meter deep hole blasting in coal mines has been successfully applied to the forced cutting of thick hard roof blasting in comprehensive mining faces of coal mines in different mining areas, permeability enhancement of low-permeability coal seams by gas blasting, weakening of hard rock comprehensive excavation working faces by deep hole blasting, weakening of hard fault structures in mining working faces by blasting, pressure relief by blasting of retained tunnels at the end of the working face, and retention of tunnels along the empty space by "cutting off the top and cutting down" of extremely thick roof slabs. At the same time, deep hole blasting is of great significance for preventing coal mine impact ground pressure, remote risk relief, and disaster prevention and mitigation of deep high-risk coal seams.

[0003] Sealing the hole is the most critical technology for the success of deep-hole blasting in coal mines. The sealing technology of deep-hole blasting in coal mines is a key link in blasting operations. It aims to ensure that the explosive energy is concentrated on the target coal and rock by effectively sealing the blasting hole, improving the blasting effect, and reducing energy loss and safety hazards. However, the current sealing methods are: manual filling: manually filling the sealing material into the hole with tools, which is simple to operate but inefficient. Mechanical filling: using mechanical equipment for filling, the operation process is cumbersome and easy to damage the detonator strand. Pressure grouting: injecting the sealing material into the hole by pressure, the sealing effect is good, but for horizontal holes and downward blast holes, it is easy to cause the slurry to mix with the explosives, causing the explosives to refuse to explode! And because the objects of deep-hole blasting in coal mines are different, the blast holes have horizontal, elevation, depression, different angles, and different charging structures. There are differences in the operation process of blast holes with different inclination angles during the sealing process, but the existing sealing devices are generally used for the sealing of blast holes at a certain inclination angle, and the scope of application is relatively narrow.

[0004] Therefore, it is necessary to design a blocking device and a method of use suitable for blastholes at any angle in coal mines to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a blocking device and a method of use suitable for blastholes at any angle in coal mines, so as to solve the above-mentioned problems and achieve the purpose of being able to block blastholes at any inclined angle.

[0006] To achieve the above-mentioned purpose, the present invention provides the following scheme: a plugging device suitable for blastholes at any angle in a coal mine, comprising a table top, a clearance groove is opened in the middle of one side wall of the table top, the bottom end of the table top is fixedly connected to the top ends of eight vertically arranged support legs, the bottom ends of the support legs are rotatably connected to universal wheels, four support legs form a group, two groups of support legs are symmetrically arranged on both sides of the clearance groove, the middle part of the bottom end of the table top is fixedly connected to a driving part, the bottom end of the driving part is rotatably connected to a blasthole plugging mechanism, and the blasthole plugging mechanism is movably arranged in the clearance groove;

[0007] The blast hole plugging mechanism includes a rotating sleeve, the bottom end of the rotating sleeve is rotatably connected to the bottom end of the driving part, a slurry supply part is arranged inside the rotating sleeve, the bottom end of the slurry supply part is fixedly connected to a slurry storage part, the slurry storage part is fixedly arranged on one group of the supporting legs, and the top end of the slurry supply part is detachably connected to an extension part.

[0008] A sealing device based on the present invention is suitable for blastholes at any angle in a coal mine, the slurry supply part comprises a telescopic rod, the fixed end of the telescopic rod is coaxially fixedly arranged inside the rotating sleeve, the telescopic end of the telescopic rod is arranged outside the rotating sleeve and fixedly connected with an angle adjustment part, the angle adjustment part is fixedly penetrated with two slurry pipes, one end of each of the slurry pipes is fixedly connected with one end of a telescopic pipe, the two telescopic pipes are arranged inside the rotating sleeve and the other ends pass through the bottom wall inside the rotating sleeve, one of the telescopic pipes is connected with the slurry storage part, and the extension part is detachably connected with one of the slurry pipes.

[0009] A sealing device based on the present invention is suitable for blastholes at any angle in a coal mine, the angle adjustment part includes a fixed disk, the fixed disk is coaxially fixedly connected to the telescopic end of the telescopic rod, two arc holes are provided on the fixed disk, the two arc holes are symmetrically arranged about the center of the fixed disk, the slurry pipe corresponds to the arc holes one by one and is movably arranged in the arc holes, a rotating disk is rotatably sleeved on the outer side of the fixed disk, the slurry pipe passes through the rotating disk and is fixedly connected to the rotating disk, the outer wall of the rotating disk is threadedly connected with a top screw, and the outer wall of the rotating disk is fixedly connected with a center alignment part and a leveling part.

[0010] A sealing device based on the present invention is suitable for blastholes at any angle in a coal mine, the leveling part includes two fixed blocks, one end of the fixed block is fixedly connected to the outer side wall of the rotating disk, a horizontally arranged plastic level bubble is fixedly connected between the other ends of the two fixed blocks, and the axis of the plastic level bubble is perpendicular to the plane where the two slurry pipes are located.

[0011] A sealing device based on the present invention is suitable for blastholes at any angle in a coal mine, the center alignment portion comprises a plurality of fixed sleeves, the plurality of fixed sleeves are arranged at equal intervals along the circumference of the outer wall of the rotating disk, one end of the fixed sleeve is fixedly connected to the outer wall of the rotating disk, the other end of the fixed sleeve is slidably connected to one end of a sliding rod, the other end of the sliding rod is fixedly connected to a hemisphere, a spring is sleeved on the outer side of the fixed sleeve and the outer side of the sliding rod, one end of the spring is fixedly connected to the outer wall of the rotating disk, and the other end of the spring is fixedly connected to the hemisphere.

[0012] A sealing device based on the present invention is suitable for blastholes at any angle in a coal mine, the driving part comprises a first motor, the first motor is fixedly connected to the bottom end of the table, the first motor is located on one side of the give way groove, the output shaft of the first motor is fixedly connected to one end of a screw, the other end of the screw is rotatably connected to a first fixed seat, the top end of the first fixed seat is fixedly connected to the bottom end of the table, the middle part of the screw is threadedly connected to the top end of a slider, a guide rod is arranged on the other side of the give way groove, the guide rod is parallel to the screw, the two ends of the guide rod are respectively fixedly connected to a second fixed seat, the top end of the second fixed seat is fixedly connected to the bottom end of the table, the middle part of the guide rod is slidably connected to the top end of another slider, the bottom end of the rotating sleeve is rotatably connected to the two sliders through two rotating shafts, and one of the ends of the rotating shaft is fixedly connected to a rotating part.

[0013] A sealing device based on the present invention is suitable for blastholes at any angle in a coal mine, wherein the rotating part includes a second motor, the second motor is fixedly embedded in the slider, the output shaft of the second motor is fixedly connected to a driving gear, the end of the rotating shaft is fixedly connected to a driven gear, and the driven gear is meshed with the driving gear.

[0014] A sealing device suitable for blastholes at any angle in coal mines is provided based on the present invention, wherein the extension portion comprises at least one extension tube, one end of which is detachably connected to the slurry tube, and the outer side wall of the other end of the extension tube is detachably provided with a sealing plate.

[0015] A sealing device based on the present invention is suitable for blastholes at any angle in a coal mine, the slurry storage part includes a support plate, the support plate is fixedly connected between a group of supporting legs, the top of the support plate is fixedly connected to a slurry box, a slurry pump is arranged inside the slurry box, the outlet end of the slurry pump is fixedly connected to one end of a connecting pipe, the other end of the connecting pipe passes through the side wall of the slurry box and is fixedly connected to the slurry pipe.

[0016] A method for using a plugging device suitable for blastholes at any angle in coal mines, including upward blasthole plugging, downward blasthole plugging, and inclined blasthole plugging;

[0017] Upward blasthole plugging:

[0018] Move to the right below the upward blast hole through the universal wheel, adjust the rotating sleeve to a vertical upward state and align it with the upward blast hole through the driving part, and inject the slurry in the slurry storage part into the upward blast hole through the slurry supply part;

[0019] Downward blasthole plugging:

[0020] Move to the top of the downward blast hole through the universal wheel, adjust the rotating sleeve to a vertical downward state and align it with the downward blast hole through the driving part, and inject the slurry in the slurry storage part into the upward blast hole through the slurry supply part;

[0021] Inclined blasthole plugging:

[0022] The universal wheel is used to move the device to the vicinity of the inclined blasthole, the driving part is used to adjust the rotating sleeve to an inclined state and align the inclined blasthole, and the slurry in the slurry storage part is injected into the inclined blasthole through the slurry supply part.

[0023] Compared with the prior art, the present invention has the following advantages and technical effects:

[0024] The present invention can adjust the horizontal position and the inclination angle of the rotating sleeve to any position through the provided driving part, so that the rotating sleeve can be aligned with the blasthole with any inclination angle. The provided slurry supply part can transport the plugging slurry contained in the slurry storage part into the blasthole to complete the effective plugging of the blasthole. The provided extension part can change the length according to the actual depth of the blasthole to ensure that the blasthole can be filled with the plugging slurry without leaving any gaps, thereby ensuring the plugging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative labor:

[0026] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0027] Figure 2 for Figure 1 A partial enlarged view of middle A;

[0028] Figure 3 for Figure 2 A partial enlarged view of B in the middle;

[0029] Figure 4 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0030] Figure 5 It is a schematic diagram of the bottom structure of the present invention;

[0031] Figure 6 for Figure 5 A partial enlarged view of middle C;

[0032] Figure 7 It is a schematic diagram of the internal structure of the rotating sleeve of the present invention.

[0033] Among them, 1. table; 2. clearance groove; 3. supporting leg; 4. universal wheel; 5. support plate; 6. slurry box; 7. counterweight; 8. fixed connecting rod; 9. rotating sleeve; 10. rotating disk; 11. extension tube; 12. sealing plate; 13. slurry tube; 14. fixed block; 15. plastic level bubble; 16. top screw; 17. fixed sleeve; 18. slide bar; 19. hemisphere; 20. spring; 21. rotating connecting rod; 22. first magnet; 23. second magnet; 24. receiving groove; 25. first motor; 26. lead screw; 27. first fixed seat; 28. guide rod; 29. ​​second fixed seat; 30. slider; 31. rotating shaft; 32. connecting pipe; 33. driven gear; 34. driving gear; 35. second motor; 36. telescopic rod; 37. fixed disk; 38. arc hole; 39. telescopic tube. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Embodiment 1:

[0037] Reference Figures 1 to 7 As shown, this embodiment provides a plugging device suitable for blastholes at any angle in a coal mine, comprising a table top 1, a clearance groove 2 is opened in the middle of one side wall of the table top 1, the bottom end of the table top 1 is fixedly connected to the top ends of eight vertically arranged support legs 3, the bottom ends of the support legs 3 are rotatably connected to universal wheels 4, four support legs 3 form a group, and two groups of support legs 3 are symmetrically arranged on both sides of the clearance groove 2, a driving part is fixedly connected to the middle of the bottom end of the table top 1, the bottom end of the driving part is rotatably connected to a blasthole plugging mechanism, and the blasthole plugging mechanism is movably arranged in the clearance groove 2;

[0038] The blasthole plugging mechanism includes a rotating sleeve 9, the bottom end of which is rotatably connected to the bottom end of the driving part. A slurry supply part is arranged inside the rotating sleeve 9, and the bottom end of the slurry supply part is fixedly connected to a slurry storage part, which is fixedly arranged on one group of supporting legs 3, and the top end of the slurry supply part is detachably connected to an extension part.

[0039] Furthermore, the slurry supply part includes a telescopic rod 36, a fixed end of the telescopic rod 36 is coaxially fixedly arranged inside the rotating sleeve 9, the telescopic end of the telescopic rod 36 is arranged outside the rotating sleeve 9 and is fixedly connected to an angle adjustment part, and the angle adjustment part is fixedly penetrated with two slurry tubes 13, one end of each slurry tube 13 is fixedly connected to one end of a telescopic tube 39, the two telescopic tubes 39 are both arranged inside the rotating sleeve 9 and the other ends pass through the bottom wall inside the rotating sleeve 9, one of the telescopic tubes 39 is connected to the slurry storage part, and the extension part is detachably connected to one of the slurry tubes 13.

[0040] The telescopic rod 36 can be freely extended to any length to transport the slurry pipe 13 and the extension portion into the blast hole. The telescopic tube 39 also changes length as the telescopic rod 36 is extended, ensuring smooth transportation of the plugging slurry.

[0041] Furthermore, the angle adjustment portion includes a fixed plate 37, which is coaxially fixedly connected to the telescopic end of the telescopic rod 36. Two arc holes 38 are provided on the fixed plate 37, and the two arc holes 38 are symmetrically arranged about the center of the fixed plate 37. The slurry pipe 13 corresponds to the arc holes 38 one by one and is movably arranged in the arc holes 38. A rotating plate 10 is rotatably sleeved on the outer side of the fixed plate 37. The slurry pipe 13 passes through the rotating plate 10 and is fixedly connected to the rotating plate 10. The outer wall of the rotating plate 10 is threadedly connected with a top screw 16, and the outer wall of the rotating plate 10 is fixedly connected with a center alignment portion and a leveling portion.

[0042] Furthermore, the leveling part includes two fixed blocks 14, one end of the fixed block 14 is fixedly connected to the outer wall of the rotating disk 10, and a horizontally arranged plastic level bubble 15 is fixedly connected between the other ends of the two fixed blocks 14, and the axis of the plastic level bubble 15 is perpendicular to the plane where the two slurry tubes 13 are located.

[0043] When sealing a blasthole with an inclined angle, it is necessary to adjust the position of the slurry pipe 13 and the extension part entering the blasthole to ensure that the plane where the extension part and the two slurry pipes 13 are located is in a vertical state rather than a horizontal or inclined state. This can ensure that the slurry fills the blasthole. If the blasthole is in a downwardly inclined state, the slurry pipe 13 connected to the extension part is the return slurry pipe, and the other slurry pipe 13 is the grouting pipe. During grouting, the slurry is gradually filled from the orifice position of the blasthole to the bottom position of the hole. When slurry flows out of the return slurry pipe, it indicates that the blasthole is filled. If the blasthole is in an upwardly inclined state, the slurry pipe 13 connected to the extension part is the return slurry pipe, and the other slurry pipe 13 is the grouting pipe. During grouting, the slurry is gradually filled from the orifice position of the blasthole to the bottom position of the hole. When slurry flows out of the return slurry pipe, it indicates that the blasthole is filled. The slurry pipe 13 with the extension is a grouting pipe, and the other slurry pipe 13 is a return slurry pipe. The slurry gradually fills from the bottom position of the blasthole to the orifice position. When slurry flows out of the return slurry pipe, it indicates that the blasthole is filled. When adjusting the position of the slurry pipe 13 and the extension, manually rotate the rotating disk 10 and observe the position of the bubble inside the plastic level bubble 15. When the bubble is rotated to the center position inside the plastic level bubble 15, it indicates that the slurry pipe 13 and the extension are in a vertical state. At this time, the relative position of the rotating disk 10 and the fixed disk 37 is fixed by the top screw 16. The principle of judging the horizontal state of the plastic level bubble 15 is a prior art and will not be repeated here.

[0044] Furthermore, the center alignment portion includes a plurality of fixed sleeves 17, and the plurality of fixed sleeves 17 are arranged at equal intervals along the circumferential direction of the outer wall of the rotating disk 10. One end of the fixed sleeve 17 is fixedly connected to the outer wall of the rotating disk 10, and the other end of the fixed sleeve 17 is slidably connected to one end of a sliding rod 18, and the other end of the sliding rod 18 is fixedly connected to a hemisphere 19. A spring 20 is sleeved on the outer side of the fixed sleeve 17 and the outer side of the sliding rod 18, and one end of the spring 20 is fixedly connected to the outer wall of the rotating disk 10, and the other end of the spring 20 is fixedly connected to the hemisphere 19.

[0045] After the rotating disk 10 enters the muzzle position of the blast hole, the spring 20 drives the slide bar 18 to extend a certain length from the fixed sleeve 17, so that the hemisphere 19 is pressed against the inner wall of the blast hole. All the springs 20 are linked to ensure that the central axis of the rotating disk 10 coincides with the central axis of the blast hole.

[0046] Furthermore, the driving part includes a first motor 25, which is fixedly connected to the bottom end of the table 1 and is located at one side of the give way slot 2. The output shaft of the first motor 25 is fixedly connected to one end of a lead screw 26, and the other end of the lead screw 26 is rotatably connected to a first fixed seat 27. The top end of the first fixed seat 27 is fixedly connected to the bottom end of the table 1, and the middle part of the lead screw 26 is threadedly connected to the top end of a slider 30. A guide rod 28 is provided on the other side of the give way slot 2, and the guide rod 28 is parallel to the lead screw 26. The two ends of the guide rod 28 are respectively fixedly connected to second fixed seats 29, and the top end of the second fixed seat 29 is fixedly connected to the bottom end of the table 1. The middle part of the guide rod 28 is slidably connected to the top end of another slider 30. The bottom end of the rotating sleeve 9 is rotatably connected to the two sliders 30 through two rotating shafts 31, and one end of one of the rotating shafts 31 is fixedly connected to a rotating part.

[0047] Furthermore, the rotating part includes a second motor 35 , which is fixedly embedded in the slider 30 , and the output shaft of the second motor 35 is fixedly connected to a driving gear 34 , and the end of the rotating shaft 31 is fixedly connected to a driven gear 33 , and the driven gear 33 meshes with the driving gear 34 .

[0048] The second motor 35 works to adjust the tilt angle of the rotating sleeve 9 through the meshing action of the driving gear 34 and the driven gear 33 so that the tilt angle corresponds to the angle of the tilted blast hole.

[0049] Furthermore, the extension portion includes at least one extension tube 11 , one end of the extension tube 11 is detachably connected to the slurry tube 13 , and the other end of the extension tube 11 is detachably sleeved with a blocking plate 12 on the outer side wall.

[0050] The number of extension tubes 11 is determined according to the actual length of the blasthole to ensure that the slurry can fully fill the interior of the blasthole.

[0051] Furthermore, the slurry storage part includes a support plate 5, which is fixedly connected between a group of supporting legs 3. A slurry box 6 is fixedly connected to the top of the support plate 5. A slurry pump is arranged inside the slurry box 6. The outlet end of the slurry pump is fixedly connected to one end of a connecting pipe 32. The other end of the connecting pipe 32 passes through the side wall of the slurry box 6 and is fixedly connected to the slurry pipe 13.

[0052] Furthermore, a support plate 5 is also fixedly connected between the other set of supporting legs 3, and a counterweight block 7 is fixedly connected to the top of the support plate 5. The counterweight block 7 can improve the stability of the entire structure during operation and movement.

[0053] A fixed link 8 is fixedly connected to the bottom of one end of the side where the two groups of supporting legs 3 are close to each other, and a rotating link 21 is movably provided at the other end. One end of the rotating link 21 is rotatably connected to one supporting leg 3, and a sink groove for accommodating the rotating link 21 is provided on the supporting leg 3. A first magnet 22 is fixedly connected to the outside of the sink groove, and a second magnet 23 is fixedly connected to the other end of the rotating link 21. The first magnet 22 corresponds to the second magnet 23, and the movable end of the rotating link 21 is correspondingly arranged in a receiving groove 24 provided on the side wall of the other supporting leg 3. Under normal circumstances, the rotating link 21 is horizontally located between the two supporting legs 3. When the rotating link 21 blocks the inclined blast hole to be blocked and the entire structure, the rotating link 21 is lifted to a vertical state to ensure that the blocking process proceeds smoothly.

[0054] A method for using a plugging device suitable for blastholes at any angle in coal mines, including upward blasthole plugging, downward blasthole plugging, and inclined blasthole plugging;

[0055] Upward blasthole plugging:

[0056] Move to the right below the upward blast hole through the universal wheel 4, adjust the rotating sleeve 9 to a vertically upward state and align it with the upward blast hole through the driving part, and inject the slurry in the slurry storage part into the upward blast hole through the slurry supply part;

[0057] The blasthole at the top of the coal mine tunnel is an upward blasthole. When the upward blasthole is blocked, the rotating sleeve 9 is adjusted to a vertically upward state, and then the corresponding number of extension tubes 11 are sequentially connected to a slurry pipe 13 according to the depth of the blasthole. The top of the extension tube 11 at the top and the extension tube 11 at the blasthole mouth are each sleeved with a blocking plate 12. The blocking plate 12 is a sacrificial structure to ensure the stability of the extension tube 11 at the bottom of the blasthole and prevent the liquid blocking material from flowing out of the blasthole before solidification. A slurry pipe 13 is used as a grouting pipe. It is fixedly connected with the slurry box 6, and another slurry pipe 13 connected with the extension pipe 11 is used as a return slurry pipe. Then the telescopic rod 36 is controlled to extend, and the extension pipe 11 and the slurry pipe 13 are sent into the blasthole. When the rotating disk 10 reaches the blasthole position, the grouting operation begins. During grouting, the blocking plate 12 is fixedly stopped at the orifice position, and the slurry first enters the orifice position of the blasthole from the grouting pipe. The blocking plate 12 prevents the slurry from flowing out of the orifice before solidification, and then gradually fills to the bottom of the hole. When slurry flows out of the orifice of the return slurry pipe, it indicates that the blasthole is filled with slurry.

[0058] Downward blasthole plugging:

[0059] Move to the top of the downward blast hole through the universal wheel 4, adjust the rotating sleeve 9 to a vertical downward state and align it with the downward blast hole through the driving part, and inject the slurry in the slurry storage part into the upward blast hole through the slurry supply part;

[0060] The blasthole at the bottom of the coal mine tunnel is a downward blasthole. The plugging process of the downward blasthole is similar to that of the upward blasthole. The difference is that the slurry pipe 13 connected to the extension pipe 11 is a grouting pipe, and the other slurry pipe 13 is a return slurry pipe. When injecting slurry, a plugging plate 12 is fixed at the end of the slurry pipe 13 connected to the extension pipe 11, and the plugging plate 12 is transported to the connection position of the charging section and the plugging section through the slurry pipe 13, so that the plugging plate 12 is used as a partition plate to separate the charging section from the plugging section, and then the slurry pipe 13 is slightly retreated for a distance to separate from the plugging plate 12, and then slurry is injected into the plugging section through the slurry pipe connected to the extension pipe 11. The slurry first fills the bottom position of the plugging section, and then gradually fills to the position of the orifice. When slurry flows out of the return slurry pipe, it indicates that the blasthole is filled with slurry.

[0061] Inclined blasthole plugging:

[0062] The universal wheel 4 is used to move the device to the vicinity of the inclined blasthole, the driving unit is used to adjust the rotating sleeve 9 to an inclined state and align the inclined blasthole, and the slurry in the slurry storage unit is injected into the inclined blasthole through the slurry supply unit.

[0063] The blocking of inclined blastholes can be divided into two cases: inclined blastholes located in the first and second quadrants, and blastholes located in the third and fourth quadrants;

[0064] The orifice positions of the inclined blastholes in the first quadrant and the second quadrant are downward, and the filling process of such blastholes is similar to that of the upward blastholes, and the slurry pipe 13 connected with the extension pipe 11 is used as a return slurry pipe, and the other slurry pipe 13 is used as a grouting pipe. Before grouting, the plane where the extension pipe 11 and the slurry pipe 13 are located is adjusted to be in a vertical state by the rotating disk 10, and then the grouting is started;

[0065] The orifices of the inclined blastholes in the third and fourth quadrants are positioned upward, and the filling process of such blastholes is similar to that of the downward blastholes. The slurry pipe 13 connected to the extension pipe 11 is used as the grouting pipe, and the other slurry pipe 13 is used as the return grouting pipe. Before grouting, the rotating disk 10 is used to adjust the plane where the extension pipe 11 and the slurry pipe 13 are located to be in a vertical state, and then grouting is started.

[0066] In the process of sealing the inclined blastholes in the four quadrants, two sealing plates 12 are required. One sealing plate 12 is located at the connection position of the charging section and the sealing section deep in the blasthole, and plays a partitioning role to separate the charging section from the sealing section to prevent the slurry from affecting the explosives. The other sealing plate 12 is located at the mouth of the blasthole and plays a sealing role to prevent the injected slurry from flowing out of the blasthole before solidification.

[0067] Embodiment 2:

[0068] The difference between this embodiment and the first embodiment is that the universal wheel 4 at the bottom end of the supporting leg 3 is replaced by a walking track, and the entire device is a crawler-type walking device.

[0069] Experimental example:

[0070] The blasthole plugging structure of the present invention is applied to the fault deep hole blasting weakening technical scheme of the 1901 working face of the Changcheng No. 3 Mine. The coal seam of the Changcheng No. 3 Mine is the 1901 working face of the +550 level 1 mining area. The working face range: east to the 1901 track lane, west to the 1901 transport lane, north to the designed stop mining line, and south to the opening eye. The working face is adjacent to the goaf of the 1903 working face in the east, the wind shaft protection coal pillar in the north, the southern boundary protection coal pillar in the south, and the western boundary protection coal pillar 50 meters away from the western boundary protection coal pillar in the west. The working face is covered by 3 upper coal, 3 coal, 5 coal, and the underlying 10 coal layers are not mined. The working face strikes 2371.8m to 2342.6m long, with an average length of 2357.2m, a face length of 195m, an area of ​​435630㎡, and a working face elevation of +942.8m to +783.5m. The ground location of the working face is located in the south of the Great Wall No. 3 Mine in Guangxi. The terrain is relatively flat, with all the ground covered with pasture vegetation and farmland. The Shangchang Line Highway passes through the southern part of the working face. The ground elevation is +1258.04m~+1231.6m, and the average vertical depth of the working face from the ground surface is 381.67m. Mining will have a certain impact on grassland, farmland and the Shangchang Line Highway. Some areas will experience subsidence and cracking.

[0071] The coal seams in this working face have a strike of 23° to 167° and a dip of 257° to 293°. The coal seam dip angle in the positive dip range of the working face is 3 to 11°, with an average of 7.2°; the coal seam dip angle in the reverse dip range is 2 to 28°, with an average of 12.4°. The reverse dip angle of the coal seam at the bottom of the working face cut is the largest, and the dip angle decreases with the mining.

[0072] Coal seam occurrence: The coal seam structure in this working face is medium, the coal seam is stable, and contains 2 to 3 layers of interlayers. Among them, the medium sandstone interlayers about 1.4 meters away from the top of the coal seam are relatively stable, about 0.15m thick, and the local thickness reaches 0.39m. The other two layers are discontinuous, with a thickness between 0.1m and 0.2m, and the average thickness of the interlayers is 0.24m. The coal thickness is 3.2m to 5.86m, the average coal thickness is 4.73m, and the pure coal thickness is 4.49m. The variation coefficient of the coal seam is 12.50%, and the mining index is 1, which is a stable coal seam.

[0073] In order to reduce the impact of hard rock in the fault on the fully mechanized mining of the working face, a drilling rig with a borehole diameter of 94mm was used for drilling, and the explosives used were coal mine gas extraction water gel columns with a diameter of 63mm. The detonators used were electric detonators permitted in coal mines.

[0074] The blasthole angle is related to the blasthole depth, coal seam inclination, fault height difference and blasthole opening position. The blasthole angle generally has two directional angles, namely the horizontal angle of the lateral working surface and the elevation angle. If the horizontal angle is designed, the blasthole length and elevation angle will be increased, the drilling positioning will be relatively complicated, and the charging difficulty will increase; therefore, the blasthole direction is mostly parallel to the working surface, and the horizontal angle is not considered.

[0075] In order to effectively solve the problem of crossing faults, blastholes are arranged in the hard rock of the fault. Taking into account the continuous changes of the fault, the interval fault is designed according to the predicted range of the fault distribution.

[0076] The specific blasting parameters are shown in the table:

[0077]

[0078]

[0079] In order to make full use of the weak surface of the coal seam, blastholes 1, 2, and 3 are the first group to be detonated; the drilling order is blasthole 1, blasthole 2, and blasthole 3. After drilling, the same section of detonators are detonated. If it is close to the working face, blasthole 1 is detonated first, then blasthole 2, and finally blasthole 3.

[0080] Boreholes 4, 5, and 6 are the second group to be detonated; the drilling order is borehole 4, borehole 5, and borehole 6, and after they are drilled, they are detonated according to the same section of detonators, or borehole 4 is detonated first, then borehole 4, and finally borehole 6.

[0081] Boreholes 7, 8, and 9 are the third group to be detonated; the drilling order is borehole 7, borehole 7, and borehole 9, and after they are drilled, they are detonated according to the same section of detonators, or borehole 7 is detonated first, then borehole 8, and finally borehole 9.

[0082] Boreholes 10, 11, 12, and 13 are the fourth group to be detonated; the drilling order is that boreholes 12 and 10 are detonated with the same section of low detonators, and boreholes 11 and 13 are detonated with the same section of high detonators.

[0083] Boreholes 14, 15, 16, and 17 are the fifth group to be detonated; the drilling order is that boreholes 16 and 14 are detonated with the same section of low detonators, and boreholes 17 and 15 are detonated with the same section of high detonators.

[0084] Boreholes 18, 19, and 20 are the sixth group to be detonated; the drilling order is boreholes 18, 19, and 20, and after they are drilled, they are detonated according to the same section of detonators, or borehole 18 is detonated first, then borehole 19, and finally borehole 20.

[0085] Boreholes 21, 22, and 23 are the seventh group to be detonated; the drilling order is borehole 21, borehole 22, and borehole 23, and after they are drilled, they are detonated according to the same section of detonators, or borehole 23 is detonated first, then borehole 22, and finally borehole 21.

[0086] The plugging device was used for plugging, and all the blast holes were detonated without punching, which verified the feasibility.

[0087] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0088] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope of the present invention.

Claims

1. A plugging device suitable for blastholes at any angle in coal mines, characterized in that: The invention comprises a table top (1), a middle part of one side wall of the table top (1) is provided with a clearance groove (2), the bottom end of the table top (1) is fixedly connected to the top ends of eight vertically arranged support legs (3), the bottom ends of the support legs (3) are rotatably connected to universal wheels (4), four support legs (3) form a group, two groups of support legs (3) are symmetrically arranged on both sides of the clearance groove (2), the middle part of the bottom end of the table top (1) is fixedly connected to a driving part, the bottom end of the driving part is rotatably connected to a blast hole blocking mechanism, and the blast hole blocking mechanism is movably arranged in the clearance groove (2); The blast hole plugging mechanism comprises a rotating sleeve (9), the bottom end of the rotating sleeve (9) is rotatably connected to the bottom end of the driving part, a slurry supply part is arranged inside the rotating sleeve (9), the bottom end of the slurry supply part is fixedly connected to a slurry storage part, the slurry storage part is fixedly arranged on one group of the supporting legs (3), and the top end of the slurry supply part is detachably connected to an extension part.

2. A plugging device suitable for blastholes at any angle in coal mines according to claim 1, characterized in that: The slurry supply portion comprises a telescopic rod (36), a fixed end of the telescopic rod (36) being coaxially fixedly arranged inside the rotating sleeve (9), a telescopic end of the telescopic rod (36) being arranged outside the rotating sleeve (9) and fixedly connected to an angle adjustment portion, two slurry pipes (13) being fixedly penetrated by the angle adjustment portion, one end of each of the slurry pipes (13) being fixedly connected to one end of a telescopic pipe (39), both of the two telescopic pipes (39) being arranged inside the rotating sleeve (9) and the other ends of which pass through the inner bottom wall of the rotating sleeve (9), one of the telescopic pipes (39) being connected to the slurry storage portion, and the extension portion being detachably connected to one of the slurry pipes (13).

3. A plugging device suitable for blastholes at any angle in coal mines according to claim 2, characterized in that: The angle adjustment portion comprises a fixed plate (37), the fixed plate (37) being coaxially fixedly connected to the telescopic end of the telescopic rod (36), the fixed plate (37) being provided with two arc-shaped holes (38), the two arc-shaped holes (38) being symmetrically arranged about the center of the fixed plate (37), the slurry pipe (13) corresponding to the arc-shaped holes (38) one by one and being movably arranged in the arc-shaped holes (38), a rotating plate (10) being rotatably sleeved on the outer side of the fixed plate (37), the slurry pipe (13) passing through the rotating plate (10) and being fixedly connected to the rotating plate (10), the outer wall of the rotating plate (10) being threadedly connected with a top screw (16), and the outer wall of the rotating plate (10) being fixedly connected with a center alignment portion and a leveling portion.

4. A plugging device suitable for blastholes at any angle in coal mines according to claim 3, characterized in that: The leveling part comprises two fixed blocks (14), one end of each of the fixed blocks (14) is fixedly connected to the outer wall of the rotating disk (10), and a horizontally arranged plastic level bubble (15) is fixedly connected between the other ends of the two fixed blocks (14), wherein the axis of the plastic level bubble (15) is perpendicular to the plane where the two slurry pipes (13) are located.

5. The plugging device for blastholes at any angle in coal mines according to claim 3 is characterized in that: The center alignment portion comprises a plurality of fixed sleeves (17), the plurality of fixed sleeves (17) being arranged at equal intervals along the circumferential direction of the outer wall of the rotating disk (10), one end of the fixed sleeve (17) being fixedly connected to the outer wall of the rotating disk (10), the other end of the fixed sleeve (17) being slidably connected to one end of a sliding rod (18), the other end of the sliding rod (18) being fixedly connected to a hemisphere (19), a spring (20) being sleeved on the outer side of the fixed sleeve (17) and the outer side of the sliding rod (18), one end of the spring (20) being fixedly connected to the outer wall of the rotating disk (10), the other end of the spring (20) being fixedly connected to the hemisphere (19).

6. The plugging device for blastholes at any angle in coal mines according to claim 1, characterized in that: The driving part comprises a first motor (25), the first motor (25) is fixedly connected to the bottom end of the table (1), the first motor (25) is located on one side of the clearance groove (2), the output shaft of the first motor (25) is fixedly connected to one end of a lead screw (26), the other end of the lead screw (26) is rotatably connected to a first fixed seat (27), the top end of the first fixed seat (27) is fixedly connected to the bottom end of the table (1), the middle part of the lead screw (26) is threadedly connected to the top end of a slider (30), the other end of the clearance groove (2) is rotatably connected to a first fixed seat (27), the top end of the first fixed seat (27) is fixedly connected to the bottom end of the table (1), the middle part of the lead screw (26) is threadedly connected to the top end of a slider (30), and the other end of the clearance groove (2) is rotatably connected to a first fixed seat (27). A guide rod (28) is arranged on the side, the guide rod (28) is parallel to the lead screw (26), the two ends of the guide rod (28) are respectively fixedly connected with a second fixed seat (29), the top end of the second fixed seat (29) is fixedly connected with the bottom end of the table (1), the middle part of the guide rod (28) is slidably connected with the top end of another slider (30), the bottom end of the rotating sleeve (9) is rotatably connected with the two sliders (30) through two rotating shafts (31), and one end of the rotating shaft (31) is fixedly connected with a rotating part.

7. A plugging device suitable for blastholes at any angle in coal mines according to claim 6, characterized in that: The rotating part comprises a second motor (35), the second motor (35) is fixedly embedded in the slider (30), the output shaft of the second motor (35) is fixedly connected to a driving gear (34), the end of the rotating shaft (31) is fixedly connected to a driven gear (33), and the driven gear (33) is meshed with the driving gear (34).

8. The plugging device for blastholes at any angle in coal mines according to claim 2, characterized in that: The extension portion comprises at least one extension tube (11), one end of the extension tube (11) is detachably connected to the slurry tube (13), and the other end of the extension tube (11) is detachably sleeved with a sealing plate (12) on the outer wall.

9. The plugging device for blastholes at any angle in coal mines according to claim 2, characterized in that: The slurry storage portion comprises a support plate (5), wherein the support plate (5) is fixedly connected between a group of support legs (3), a slurry box (6) is fixedly connected to the top of the support plate (5), a slurry pump is arranged inside the slurry box (6), and the outlet end of the slurry pump is fixedly connected to one end of a connecting pipe (32), and the other end of the connecting pipe (32) passes through the side wall of the slurry box (6) and is fixedly connected to the slurry pipe (13).

10. A method for using the plugging device for blastholes at any angle in coal mines according to any one of claims 1 to 9, characterized in that: Including upward blasthole blocking, downward blasthole blocking, and inclined blasthole blocking; Upward blasthole plugging: The universal wheel (4) is used to move the rotating sleeve (9) to the position directly below the upward blast hole, and the driving part is used to adjust the rotating sleeve (9) to a vertically upward position and align the upward blast hole, and the slurry in the slurry storage part is injected into the upward blast hole through the slurry supply part; Downward blasthole plugging: The universal wheel (4) is used to move the rotating sleeve (9) to the top of the downward blast hole, and the driving part is used to adjust the rotating sleeve (9) to a vertical downward state and align with the downward blast hole, and the slurry in the slurry storage part is injected into the upward blast hole through the slurry supply part; Inclined blasthole plugging: The universal wheel (4) is used to move the device to the vicinity of the inclined blast hole, the driving unit is used to adjust the rotating sleeve (9) to an inclined state and align the inclined blast hole, and the slurry in the slurry storage unit is injected into the inclined blast hole through the slurry supply unit.

Images