An internal roof cutting device for a coal mine roadway and a working method thereof

Abstract

The application discloses a kind of internal cutting seam devices of coal mine roadway roof, comprising: mobile chassis, entire device can be driven to move;Rotary table, it is located on mobile chassis, can rotate 360 °;Cutting mechanism, it includes two rotating wheels and along the annular cutting rope of rotating wheel around setting;Depth adjustment mechanism, it is equipped with two, respectively with one rotating wheel connection;Lifting mechanism, it is equipped with two, respectively with one depth adjustment mechanism connection, lifting mechanism and depth adjustment mechanism cooperation can adjust cutting depth;Rotary mechanism, it is equipped with two, respectively with one lifting mechanism connection, can adjust cutting angle;Translation mechanism, it is located on rotary table, can drive two rotary mechanisms to move towards, can adjust cutting interval.The application can realize deep hole cutting seam, and safe, efficient, small disturbance;And can be adjusted according to cutting requirement cutting depth, cutting interval, cutting angle, wide range of adaptation.

Description

Technical Field

[0001] This invention belongs to the field of coal mining technology, and specifically relates to a device for internal slit cutting in the roof of a coal mine roadway. This invention also relates to a method for operating the device for internal slit cutting in the roof of a coal mine roadway. Background Technology

[0002] With the depletion of coal resources, the problem of coal resource waste caused by traditional pillar mining has become increasingly prominent. Therefore, the technology of roadway retention along the goaf has been vigorously promoted and applied. Roof cutting and pressure relief roadway retention along the goaf, as a new type of roadway retention technology, not only improves the coal resource recovery rate, reduces roadway excavation volume, and lowers the risk of accidents during roadway excavation, but also improves the stress transmission structure and the stress environment of the surrounding rock by cutting the roof, further eliminating the need for backfill and avoiding problems such as deformation and splitting caused by stress concentration in the backfill. This technology has achieved good economic and social benefits and has broad prospects.

[0003] Roof pre-splitting is the core technology of roof cutting and pressure relief along the goaf, and it is one of the decisive factors in the formation effect of the goaf roadway. Currently, the main methods of roof cutting are shaped charge blasting and hydraulic fracturing. However, these methods have the following limitations: ① Large disturbance: The roof cutting process generates severe disturbance, changing the position of the mine pressure, requiring support. ② High degree of danger: Shaped charge blasting may result in misfires, which are extremely difficult to handle. ③ High cost: Roof cutting equipment is expensive, and multiple workers are required to operate it.

[0004] Prior to this invention, patent application number 202011022262.X disclosed a roof cutting and pressure relief device and method for a fully mechanized coal mining face, mainly composed of an upper plate, a support base plate, a support unit, a cutting unit, and a pushing unit. The device is positioned at the end of the face, using the cutting unit to cut the roof and the pushing unit to move along the roadway to achieve its function. However, it is mainly used for roof cutting near the support, unsuitable for cutting ahead of the working face, and cannot achieve roof cutting in front of the working face over long distances. Furthermore, the cutting mechanism (cutting saw blade) of this device has a small cutting range and high wear, suitable only for shallow cuts and not for deep-hole cuts. Since roof cutting to form a roadway generally requires forming a deep cut in front of the working face to block stress transmission between the working face and the roof, this invention does not meet the requirements of roof cutting to form a roadway.

[0005] Therefore, there is a need to invent a device for deep hole cutting that is safe, efficient, causes minimal disturbance, and is easy to operate inside the roof of coal mine roadways. Summary of the Invention

[0006] The present invention aims to provide a cutting device for the internal slit of the roof of a coal mine roadway, so as to overcome the shortcomings of the prior art.

[0007] To solve the above technical problems, the technical scheme of the present application is: a coal mine roadway roof internal cutting device, comprising:

[0008] A mobile chassis drives the coal mine roadway roof internal cutting device to move;

[0009] A rotating table is provided on the mobile chassis and can rotate 360 degrees;

[0010] A cutting mechanism includes two rotating wheels and an annular cutting rope arranged around the rotating wheels. The cutting rope is a diamond rope, and the cutting range of the cutting rope is larger and the loss is smaller than that of a cutting saw blade.

[0011] Two depth adjustment mechanisms are provided, and the upper ends of the two depth adjustment mechanisms are respectively connected to one rotating wheel. The depth of the rotating wheel into the blast hole can be adjusted according to the cutting depth of the roof.

[0012] Two lifting mechanisms are provided, and are respectively connected to one depth adjustment mechanism. The lifting mechanism drives the depth adjustment mechanism to extend into the blast hole, realizes deep hole cutting, and adjusts the cutting depth.

[0013] Two rotating mechanisms are provided, and the output ends of the two rotating mechanisms are respectively connected to one lifting mechanism. The rotating mechanism drives the lifting mechanism to rotate, adjusts the angle of the lifting mechanism, and adjusts the angle of the cutting mechanism connected thereto, so as to adapt to the angle of the blast hole and have a wide range of adaptation.

[0014] A translation mechanism is provided on the rotating table. The translation mechanism is connected to the rotating mechanism and drives the two rotating mechanisms to move towards each other. By adjusting the distance between the two rotating mechanisms, the distance between the two rotating wheels is adjusted to adapt to different blast hole spacings and have a wide range of adaptation.

[0015] A control console is provided on the rotating table away from the translation mechanism. The control console is electrically connected to the mobile chassis, the rotating table, the cutting mechanism, the depth adjustment mechanism, the lifting mechanism, the rotating mechanism, and the translation mechanism. The action of each mechanism is controlled through the control console, and the degree of automation is high.

[0016] Further, the coal mine roadway roof internal cutting device described above, the lifting mechanism includes a lifting frame, a transmission screw rod, a lifting body, and a first drive. The transmission screw rod is provided in the lifting frame and is rotationally connected to the lifting frame. One end of the transmission screw rod is connected to the first drive provided in the lifting frame. The lifting body is connected to the transmission screw rod. The first drive drives the transmission screw rod to rotate, thereby driving the lifting body to lift.

[0017] Further, the coal mine tunnel roof internal cutting device, the depth adjusting mechanism comprises a guide rod, a connecting rod, a clamp, and a supporting rod body, the clamp is fixed on the upper end of the lifting frame, the supporting rod body is arranged on the lifting body, the clamp and the supporting rod body are arranged on one side of the lifting frame, the lower end of the connecting rod is connected with the supporting rod body, and the upper end of the connecting rod is connected with the guide rod, the guide rod and the connecting rod pass through the clamp and are movably connected with the clamp, and a rotating wheel is connected with the upper end of the guide rod.

[0018] Further, the coal mine tunnel roof internal cutting device, the clamp comprises a clamp body, an extrusion plate, a rotating column, and a second drive, the clamp body is fixed on the lifting frame and has a frame structure, the extrusion plate is arranged in the clamp body and is movably connected with the clamp body, a sliding groove matched with the extrusion plate is arranged on the side wall of the clamp body, the sliding groove can improve the movement stability of the extrusion plate, one end of the rotating column is connected with the second drive, the other end of the rotating column passes through the clamp body and is connected with the extrusion plate, the extrusion plate and the side wall of the clamp body form a clamping opening, and a friction pad is arranged on the extrusion surface of the clamping opening, the friction pad can increase the friction of the extrusion surface, thereby improving the clamping force of the clamp. The second drive drives the rotating column to rotate, so that the extrusion plate moves forward or backward in the sliding groove, the clamping opening is reduced or enlarged, and the fixing and loosening of the guide rod or the connecting rod are realized.

[0019] Further, the coal mine tunnel roof internal cutting device, the connecting rod is composed of a plurality of connecting rod sub-rods, the number of the connecting rod sub-rods is determined according to the cutting depth, a threaded connector is arranged on the upper end of the connecting rod sub-rod, and a threaded hole two is arranged on the lower end of the connecting rod sub-rod, a limiting hole is further arranged above the threaded hole two on the connecting rod sub-rod, adjacent connecting rod sub-rods are threadedly connected through the connector and the threaded hole two, and the depth cutting can be realized through the arrangement of the plurality of connecting rod sub-rods; a threaded hole one is arranged on the lower end of the guide rod, and the guide rod and the connecting rod are threadedly connected through the threaded hole one and the connector; the guide rod and the connecting rod sub-rod, the connecting rod sub-rod and the connecting rod sub-rod are threadedly connected, and the assembly and disassembly are convenient and simple; a connecting rod groove is arranged on the supporting rod body, a penetrating fixing groove is arranged on the side wall of the connecting rod groove, a locking rod is inserted into the fixing groove, and the locking rod cooperates with the limiting hole to limit the lower end of the connecting rod. The locking rod fixes or loosens the connecting rod by being inserted into or pulled out of the limiting hole.

[0020] Further, the coal mine tunnel roof internal cutting device, the depth adjusting mechanism further comprises a roof supporting body, the roof supporting body is fixed on the lifting frame, and an output end of the roof supporting body cooperates with the roof or the tunnel side. After the angle and the distance of the main body frame are adjusted, the roof supporting body is elongated and abuts against the roof or the tunnel side, so that the operation stability of the device is improved.

[0021] Further, the coal mine roadway roof internal cutting device, the cutting mechanism further includes a micro drive, the upper end of the guide rod is provided with a rotating wheel groove, the rotating wheel is arranged in the rotating wheel groove and is rotationally connected with the rotating wheel groove, and the micro drive is arranged outside the rotating wheel groove and is connected with the rotating wheel.

[0022] Further, the coal mine roadway roof internal cutting device, the translation mechanism includes a translation main body, a moving plate, a threaded column, a support plate, and a third drive, the translation main body is fixed on the rotating table, the threaded column is arranged in the translation main body, one end is connected with the third drive, the threaded column is provided with the moving plate which is symmetrically arranged at both ends, the threaded column is provided with two sections of threads with opposite rotation directions, and the two moving plates move towards each other when the threaded column rotates; the inner side walls of the two sides of the translation main body in the length direction of the threaded column are provided with the support plates, the support plates are located below the moving plates and support the moving plates, so that the pressure of the moving plates is relieved; and the outer side walls of the two sides of the translation main body in the length direction of the threaded column are provided with limiting grooves. The third drive drives the threaded column to rotate, so that the moving plates move towards each other, and then the rotating mechanism mounted on the moving plates moves towards each other, the lifting mechanism moves towards each other driven by the rotating mechanism, and then the distance between the two rotating wheels is adjusted to adapt to the distance between the blast holes.

[0023] Further, the coal mine roadway roof internal cutting device, the rotating mechanism includes a rotating main body, a driving wheel, a driven wheel, a transmission chain and a fourth drive, the rotating main body is connected with the moving plate, the fourth drive is arranged above the rotating main body, the output end of the fourth drive is connected with the driving wheel, the driven wheel is in transmission connection with the driving wheel through the transmission chain, the driven wheel is arranged in the rotating main body, and the output end of the driven wheel extends out of the rotating main body and is connected with the lifting frame; the lower end of the rotating main body is provided with a T-shaped groove, the T-shaped groove is matched with the moving plate and the limiting groove and is in sliding connection with the limiting groove, and the moving stability of the rotating mechanism is improved. The rotating main body is provided with an opening for facilitating the installation of the transmission chain and the output end of the driven wheel; the driving wheel rotates to drive the driven wheel to rotate, so that the angle of the lifting mechanism is adjusted, and then the angle of the rotating wheel and the cutting rope is adjusted to adapt to the angle of the blast hole.

[0024] The application also provides a working method of the coal mine roadway roof internal cutting device, which comprises the following steps:

[0025] S1, drilling blast holes in the roadway roof of the advance working face, and the blast holes are along the roadway direction;

[0026] S2, the lower end of the guide rod with the rotating wheel installed is placed into the clamping opening of the clamp, is clamped and fixed, then according to the distance between the blast holes, the distance between the two rotating wheels is adjusted by starting the translation mechanism, so that the distance between the rotating wheels adapts to the distance between the blast holes, and after the completion, the cutting rope is installed;

[0027] S3, according to the borehole angle, starting the rotating mechanism, adjusting the angle of the guide rod, so that the angle of the guide rod is adapted to the borehole angle;

[0028] S4, starting the rotating table to make the translation mechanism vertical to the direction of the roadway, and starting the moving chassis to make the two rotating wheels respectively located in the adjacent two boreholes, and then starting the roof support body to extend and abut against the roof or the sidewall of the roadway;

[0029] S5, connecting the connecting rod with the guide rod, the bottom end of the connecting rod is located in the connecting rod slot of the supporting rod body and is fixed by the locking rod, the clamp jaw is loosened, then the micro motor is started, the rotating wheel drives the cutting rope to rotate to cut the roof, at the same time, the lifting mechanism is started, the lifting body drives the supporting rod body to slowly rise, so that the rotating wheel and the cutting rope gradually penetrate into the roof to cut;

[0030] S6, when the supporting rod body approaches the bottom of the clamp, the lifting mechanism stops, the clamp is contracted to fix the connecting rod, the locking rod is pulled out to release the connection relationship between the bottom end of the first connecting rod branch and the supporting rod body, the supporting rod body is lowered, then the top end of the second connecting rod branch is connected with the first connecting rod branch, the bottom end is put into the connecting rod slot of the supporting rod body and is fixed by the locking rod, then the clamp jaw is loosened, the lifting mechanism is started to slowly lift the supporting rod body, so that the rotating wheel and the cutting rope continue to penetrate into the roof to cut;

[0031] S7, according to the cutting depth, repeating step S6, connecting multiple connecting rod branches until the predetermined cutting depth is reached;

[0032] S8, after cutting is completed, the lifting mechanism is started in reverse rotation to make the supporting rod body move downward, and the clamp is cooperated to remove the connecting rod branches one by one until all the connecting rod branches are removed;

[0033] S9, after the connecting rod is removed, the moving chassis drives the device to move to the next borehole position where the roof needs to be cut, and steps S2-S8 are repeated to continue cutting the roof;

[0034] S10, when cutting is not needed, the connecting rod and the guide rod are removed, the spacing of the two lifting mechanisms is contracted, the rotating mechanism, the rotating table are adjusted, the lifting mechanism is rotated to be horizontally placed and is parallel to the direction of the roadway, the occupied space of the device is reduced, finally, the moving chassis drives the device to move to the parking position.

[0035] Compared with the prior art, the coal mine roadway roof internal cutting device has the following beneficial effects:

[0036] 1、The coal mine roadway roof internal cutting device has the following beneficial effects:

[0037] 2. The coal mine roadway roof internal cutting device can be used for cutting in front of the working face (generally within 0-25m in front of the working face), cancels the explosive used for cutting the roof, avoids the safety hidden danger caused by using the explosive, and has small disturbance to the surrounding rock of the roadway;

[0038] 3. The coal mine roadway roof internal cutting device has simple structure and convenient operation, does not need to stop mining when cutting the roof, and can be constructed by multiple devices at the same time, thereby improving the cutting efficiency of the roof. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 Fig. 1 is a working schematic view of the coal mine roadway roof internal cutting device;

[0040] Figure 2 Fig. 2 is a front view of the coal mine roadway roof internal cutting device;

[0041] Figure 3 Fig. 3 is a side view of the coal mine roadway roof internal cutting device;

[0042] Figure 4 Fig. 4 is a structure schematic view of a lifting mechanism of the coal mine roadway roof internal cutting device;

[0043] Figure 5 Fig. 5 is a structure schematic view of a guide rod of the coal mine roadway roof internal cutting device;

[0044] Figure 6 Fig. 6 is a structure schematic view of a connecting rod of the coal mine roadway roof internal cutting device;

[0045] Figure 7 Fig. 7 is a structure schematic view of a clamp of the coal mine roadway roof internal cutting device;

[0046] Figure 8 Fig. 8 is a structure schematic view of a rod bearing body of the coal mine roadway roof internal cutting device;

[0047] Figure 9 Fig. 9 is a structure schematic view of a translation mechanism of the coal mine roadway roof internal cutting device;

[0048] Figure 10 Fig. 10 is a side structure schematic view of the coal mine roadway roof internal cutting device; Figure 9

[0049] Figure 11 Fig. 11 is a structure schematic view of a rotating mechanism of the coal mine roadway roof internal cutting device;

[0050] Fig. 1: 1 - moving chassis; 2 - rotating table;

[0051] ​3 - cutting mechanism; 31 - rotating wheel; 32 - cutting rope; 33 - micro drive;

[0052] 4 - depth adjustment mechanism; 41 - guide rod; 411 - threaded hole one; 412 - rotating wheel groove; 42 - connecting rod; 421 - connecting rod branch; 4211 - connecting head; 4212 - threaded hole two; 4213 - limiting hole; 43 - clamp, 431 - clamp body, 4311 - sliding groove; 432 - extrusion plate, 433 - rotating column, 434 - second drive; 435 - clamping opening; 436 - friction pad; 44 - supporting rod body; 441 - connecting rod groove; 442 - fixed groove; 443 - locking rod; 45 - top support body;

[0053] 5 - lifting mechanism; 51 - lifting frame; 52 - transmission screw; 53 - lifting body; 54 - first drive;

[0054] 6 - rotating mechanism; 61 - rotating body; 611 - T-shaped groove; 62 - driving wheel; 63 - driven wheel; 64 - transmission chain; 65 - fourth drive;

[0055] 7 - translation mechanism; 71 - translation body; 72 - moving plate; 73 - threaded column; 74 - support plate; 75 - third drive; 76 - limiting groove;

[0056] 8 - control console;

[0057] 100 - blast hole; 200 - top plate. DETAILED DESCRIPTION

[0058] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0059] Embodiment 1

[0060] The present application is mainly used for advanced working face cutting (generally in the range of 0-25m in front of the working face), which realizes cutting and pressure relief, and mainly avoids the influence of advanced support pressure on the surrounding rock of the roadway.

[0061] As Figures 1-3As shown in the figure, the coal mine roadway roof internal cutting device provided by the present application comprises: a mobile chassis 1, which can drive the coal mine roadway roof internal cutting device to move; a rotating table 2, which is arranged on the mobile chassis 1 and can rotate by 360°, and a bearing plate is arranged on the rotating table 2, which can facilitate the installation of a translation mechanism 7, and the rotating table 2 can make a rotating wheel 31 vertically penetrate into a blast hole 100 in the direction of the roadway, so that a cutting rope 32 cuts the roof 200 between the two blast holes 100; a cutting mechanism 3, which comprises two rotating wheels 31 and an annular cutting rope 32 arranged along the rotating wheels 31, the cutting rope 32 is a diamond rope, and the cutting range of the cutting rope 32 is larger and the loss is smaller than that of a cutting saw blade; two depth adjusting mechanisms 4, the upper ends of the two depth adjusting mechanisms 4 are respectively connected with one rotating wheel 31, and the depth adjusting mechanism 4 can adjust the depth of the rotating wheel 31 penetrating into the blast hole 100; two lifting mechanisms 5, which are respectively connected with one depth adjusting mechanism 4, the lifting mechanism 5 drives the depth adjusting mechanism 4 to extend into the blast hole 100, realizes deep hole cutting, and adjusts the cutting depth; two rotating mechanisms 6, which are oppositely arranged, the output ends of the two rotating mechanisms 6 are respectively connected with one lifting mechanism 5, the rotating mechanism 6 drives the lifting mechanism 5 to rotate, adjusts the angle of the lifting mechanism 5, that is, adjusts the angle of the cutting mechanism 3 connected therewith, so as to adapt to different blast hole angles; a translation mechanism 7, which is arranged on the rotating table 2, the translation mechanism 7 is connected with the rotating mechanism 6 and drives the two rotating mechanisms 6 to move towards each other, the distance between the two rotating mechanisms 7 is adjusted, so that the distance between the two rotating wheels 31 is adjusted, so as to adapt to different blast hole spacings; and a control console 8, which is arranged on one side of the rotating table 2 away from the translation mechanism 7, is electrically connected with the mobile chassis 1, the rotating table 2, the cutting mechanism 3, the depth adjusting mechanism 4, the lifting mechanism 5, the rotating mechanism 6 and the translation mechanism 7, and controls the actions of the mechanisms through the control console 8, so that the degree of automation is high.

[0062] As shown in the figure, Figure 4 The lifting mechanism 5 comprises a lifting frame 51, a transmission screw rod 52, a lifting body 53 and a first drive 54, the lifting frame 51 is 1800-2000 mm high, facilitating the connection of a rod, the transmission screw rod 52 is arranged in the lifting frame 51 and is rotationally connected with the lifting frame 51, one end of the transmission screw rod 52 is connected with the first drive 54 arranged in the lifting frame 51, and the lifting body 53 is connected with the transmission screw rod 52. The first drive 54 drives the transmission screw rod 52 to rotate, thereby driving the lifting body 53 to lift.

[0063] In addition, as shown in the figure, Figures 2-8As shown, the depth adjustment mechanism 4 comprises a guide rod 41, a connecting rod 42, a clamp 43, and a supporting rod body 44. The clamp 43 is fixed on the upper end of the lifting frame 51, the supporting rod body 44 is arranged on the lifting body 43, and the clamp 43 and the supporting rod body 44 are arranged on one side of the lifting frame 51. The lower end of the connecting rod 42 is connected with the supporting rod body 44, and the upper end is connected with the guide rod 41. The guide rod 41 and the connecting rod 42 pass through the clamp 43 and are movably connected with the clamp 43. The clamp 43 can clamp or loosen the guide rod 41 and the connecting rod 42. The upper end of the guide rod 41 is connected with a rotating wheel 31.

[0064] In the above structure, as shown, Figure 7 The clamp 43 comprises a clamp main body 431, a pressing plate 432, a rotating column 433, and a second drive 434. The clamp main body 431 is fixed on the lifting frame 51 and has a frame structure. The pressing plate 432 is arranged in the clamp main body 431 and is slidably connected with the clamp main body 431. The side wall of the clamp main body 431 is provided with a sliding groove 4311 matched with the pressing plate 432, which can improve the moving stability of the pressing plate 432. One end of the rotating column 433 is connected with the second drive 434, and the other end passes through the clamp main body 431 and is connected with the pressing plate 432. The pressing plate 432 and the side wall of the clamp main body 431 form a clamping opening 435. A friction pad 436 is arranged on the pressing surface of the clamping opening 435. The friction pad 436 can increase the friction of the pressing surface, thereby improving the clamping force of the clamp 43. The second drive 434 drives the rotating column 433 to rotate, so that the pressing plate 432 moves forward or backward in the sliding groove 4311, which causes the clamping opening 435 to be reduced or enlarged, thereby realizing the fixation and loosening of the guide rod 41 or the connecting rod 42.

[0065] In addition, as shown, Figures 2-6 The connecting rod 42 is composed of a plurality of connecting rod sub-rods 421. The number of the connecting rod sub-rods 421 is determined according to the cutting depth. The upper end of the connecting rod sub-rod 421 is provided with a threaded connecting head 4211, and the lower end is provided with a threaded hole two 4212. The connecting rod sub-rod 421 is further provided with a limiting hole 4213 above the threaded hole two 4212. Adjacent connecting rod sub-rods 421 are threadedly connected through the connecting head 4211 and the threaded hole two 4212. The lower end of the guide rod 41 is provided with a threaded hole one 411. The guide rod 41 and the connecting rod 42 are threadedly connected through the threaded hole one 411 and the connecting head 4211. The guide rod 41 and the connecting rod sub-rod 421, and the connecting rod sub-rod 421 and the connecting rod sub-rod 421 are threadedly connected, which is convenient and simple to disassemble and assemble. The guide rod 41 is a hollow rod made of stainless steel, with a square cross section, an outer edge length of 40-50mm, a length of 1500mm, and a wall thickness of 8-10mm. The connecting rod is a hollow rod made of stainless steel, with a square cross section, an outer edge length of 40-50mm, a length of 1200mm, and a wall thickness of 8-10mm.

[0066] In addition, as shown in Figure 8 The support rod body 44 is made of stainless steel, and a connecting rod groove 441 is arranged on the support rod body 44. A fixing groove 442 is arranged on the side wall of the connecting rod groove 441. The fixing groove 441 is arranged corresponding to the clamping opening 435 of the clamp 43, so as to facilitate the lifting of the connecting rod 42. The locking rod 443 is inserted into the fixing groove 442. The locking rod 443 cooperates with the limiting hole 4213 to limit the lower end of the connecting rod 42. The locking rod 443 is inserted into or pulled out of the limiting hole 4213 to fix or loosen the connecting rod 42.

[0067] As shown in Figures 2-3 The depth adjusting mechanism 4 further comprises a top support body 45. The top support body 45 is fixed on the lifting frame 51, and the output end of the top support body 45 cooperates with the roof 200 or the sidewall of the roadway. The top support body 45 can be a hydraulic prop. After the angle and the spacing of the lifting frame 51 are adjusted, the top support body 45 is elongated to abut against the roof 200 or the sidewall of the roadway, so as to improve the operation stability of the device.

[0068] Embodiment 2

[0069] Based on the structure of the first embodiment, the second embodiment is further improved. As shown in Figures 1-3 The cutting mechanism 3 further comprises a micro drive 33. The upper end of the guide rod 41 is provided with a rotating wheel groove 412. The rotating wheel 31 is arranged in the rotating wheel groove 412 and is rotationally connected with the rotating wheel groove 412. The micro drive 33 is arranged outside the rotating wheel groove 412 and is connected with the rotating wheel 31. The rotating wheel 31 is made of stainless steel and has a diameter of 60-70 mm. The rotating wheel 31 is provided with a rope groove, so as to facilitate the installation of the cutting rope 32 around the rotating wheel 31. The micro motor 33 drives the rotating wheel 31 to rotate, so as to drive the cutting rope 32 to move around the rotating wheel 31 and cut the roof 200.

[0070] In addition, as shown in Figures 9-10As shown, the translation mechanism 7 includes a translation main body 71, a moving plate 72, a threaded column 73, a support plate 74, a third drive 75, the translation main body 71 is fixed on the rotating table 2, the threaded column 73 is arranged inside the translation main body 71, one end is connected with the third drive 75, the threaded column 73 is provided with the moving plate 72 arranged symmetrically at both ends, the threaded column 72 is provided with two sections of threads with opposite rotation directions, and the two moving plates 72 move towards each other when the threaded column 73 rotates; the support plate 74 is arranged on the inner side wall of the translation main body 71 along the length direction of the threaded column 73, and the support plate 74 is located below the moving plate 72 and supports the moving plate 72, so that the pressure of the moving plate 72 can be relieved; the limiting groove 76 is arranged on the outer side wall of the translation main body 71 along the length direction of the threaded column 73. The third drive 75 drives the threaded column 73 to rotate, so that the moving plate 72 translates towards each other, and then drives the rotating mechanism 6 mounted on the moving plate 72 to move towards each other, and the rotating mechanism 6 drives the lifting mechanism 5 to move towards each other, so as to adjust the distance between the two rotating wheels 31, so as to adapt to the distance between the blast holes.

[0071] In addition, as shown in the figure, Figure 11 As shown, the rotating mechanism 6 includes a rotating main body 61, a driving wheel 62, a driven wheel 63, a transmission chain 64 and a fourth drive 65, the rotating main body 61 is connected with the moving plate 72, the fourth drive 65 is arranged above the rotating main body 61, the output end of the fourth drive 65 is connected with the driving wheel 62, the driven wheel 63 is connected with the driving wheel 62 through the transmission chain 64, the driven wheel 63 is arranged inside the rotating main body 61, and the output end of the driven wheel 61 extends out of the rotating main body 61 and is connected with the lifting frame 51; the lower end of the rotating main body 61 is provided with a T-shaped groove 611, the T-shaped groove 611 is matched with the moving plate 72 and the limiting groove 76, and is in sliding connection with the limiting groove 76, so as to improve the moving stability of the rotating mechanism 6. The rotating main body 61 is provided with an opening for facilitating the installation of the transmission chain 64 and the output end of the driven wheel 63; the driving wheel 62 rotates to drive the driven wheel 63 to rotate, so as to adjust the angle of the lifting mechanism 5, and then adjust the cutting angle of the rotating wheel 31 and the cutting rope 32, so as to adapt to the angle of the blast hole.

[0072] Embodiment 3

[0073] The working method of the coal mine roadway roof internal cutting device provided by the application comprises the following steps:

[0074] S1, drill a blast hole 100 in the roadway roof 200 of the advanced working face, the blast hole 100 is along the roadway direction, the blast hole diameter is not less than 110mm, and the blast hole spacing is 300-1500mm;

[0075] S2, the lower end of the guide rod 41 installed with the rotating wheel 31 is put into the clamp 435 of the clamp, clamped and fixed, then the translation mechanism 7 is started to adjust the interval between the two rotating wheels 31 according to the interval of the blast hole 100, so that the interval between the rotating wheels 31 is adapted to the interval of the blast hole 100, and then the cutting rope 32 is installed;

[0076] S3, according to the angle of the blast hole 100, the rotation mechanism 6 is started to adjust the angle of the guide rod 41, so that the angle of the guide rod 41 is adapted to the angle of the blast hole 100;

[0077] S4, the translation mechanism 7 is rotated to the vertical direction of the roadway by starting the rotating table 2, and the moving chassis 1 is started to make the two rotating wheels 31 located in the adjacent two blast holes 100 respectively, at this time, the front end of the guide rod 41 is overlapped on the blast hole 100, and then the roof support 45 is started to be elongated and pressed against the roof or the sidewall of the roadway;

[0078] S5, the connecting rod 42 is connected with the guide rod 41, the bottom end of the connecting rod 42 is located in the connecting rod groove 441 of the support rod body 44, and is fixed by the locking rod 443, then the clamp 435 is loosened, and then the micro motor 33 is started to rotate the rotating wheel 31 to rotate the cutting rope 32 to cut the roof 200, at the same time, the lifting mechanism 5 is started to slowly lift the support rod body 44 by the lifting body 53, so that the rotating wheel 31 and the cutting rope 32 gradually penetrate into the roof 200;

[0079] S6, when the support rod body 44 approaches the bottom of the clamp 43, the lifting mechanism 5 stops, the clamp 43 is retracted to fix the connecting rod 42, the locking rod 443 is pulled out to release the connection between the lower end of the first connecting rod 421 and the support rod body 44, the support rod body 44 is lowered, then the upper end of the second connecting rod 421 is connected with the first connecting rod 421, the bottom end is put into the connecting rod groove 441 of the support rod body 44 and is fixed by the locking rod 443, then the clamp 435 is loosened, and the lifting mechanism 5 is started to slowly lift the support rod body 44, so that the rotating wheel 31 and the cutting rope 32 continue to penetrate into the roof;

[0080] S7, according to the cutting depth, the step S6 is repeated to connect multiple connecting rods 421 until the predetermined cutting depth is reached;

[0081] S8, after the cutting is completed, the lifting mechanism 5 is started in reverse rotation to move the support rod body 44 downward, and the clamp 43 is used to remove the connecting rod 421 one by one until all the connecting rods 421 are removed;

[0082] S9, after the connecting rod 42 is removed, the moving chassis 1 drives the device to move to the blast hole position where the roof 200 needs to be cut, and the steps S2-S8 are repeated to continue cutting the roof 200; it should be noted that if the interval and angle of the blast hole 100 of the next position are unchanged, the steps S2 and / or S3 can be skipped;

[0083] S10, when not need to cut, the connecting rod 42 and guide rod 41 are all removed, the interval of two lifting mechanisms 5 is shrunk, the rotating mechanism 6, the rotating table 2 are adjusted, the lifting mechanism 5 is rotated to horizontal placement, and is parallel to the tunnel trend, the device occupied space is reduced, finally, the mobile chassis 1 is driven to move the device to the parking position.

[0084] The working method is simple and convenient in operation, the roof 200 does not need to be cut during mining, and multiple devices can be simultaneously constructed, so that the efficiency is improved.

[0085] It is apparent to those skilled in the art that the present application is not limited to the details of the foregoing exemplary embodiments, and that the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the foregoing description, and it is intended that all changes that come within the meaning and range of equivalency of the claims are embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0086] Furthermore, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification need necessarily include every independent technical feature. The description herein of the embodiments is merely intended to be illustrative and not exhaustive of all possible embodiments which could be devised in accordance with the present specification. Developments, simplifications and variations from the specific embodiments disclosed can be made within the scope of the present application, without departing from the spirit of the application.

Claims

1. A device for internal slit cutting in the roof of a coal mine roadway, characterized in that, The internal slit-cutting device for the roof of the coal mine roadway includes: A mobile chassis (1) drives the internal cutting device of the coal mine roadway roof to move; A rotating platform (2) is mounted on a movable chassis (1) and can rotate 360°. The cutting mechanism (3) includes two rotating wheels (31) and an annular cutting rope (32) wound around the rotating wheels (31); Depth adjustment mechanism (4), two depth adjustment mechanisms (4) are provided, and the upper ends of the two depth adjustment mechanisms (4) are respectively connected to a rotating wheel (31); Lifting mechanism (5), two lifting mechanisms (5) are provided, each connected to a depth adjustment mechanism (4); Rotating mechanism (6), two rotating mechanisms (6) are provided, the two rotating mechanisms (6) are arranged opposite to each other, and their output ends are respectively connected to a lifting mechanism (5); Translation mechanism (7), which is mounted on a rotating table (2), is connected to a rotating mechanism (6) and drives the two rotating mechanisms (6) to move towards each other; The control console (8) is located on the rotary table (2) on the side away from the translation mechanism (7) and is electrically connected to the moving chassis (1), the rotary table (2), the cutting mechanism (3), the depth adjustment mechanism (4), the lifting mechanism (5), the rotation mechanism (6), and the translation mechanism (7).

2. The internal slit cutting device for the roof of a coal mine roadway according to claim 1, characterized in that: The lifting mechanism (5) includes a lifting frame (51), a transmission screw (52), a lifting body (53), and a first drive (54). The transmission screw (52) is located inside the lifting frame (51) and is rotatably connected to the lifting frame (51). One end of the transmission screw (52) is connected to the first drive (54) located inside the lifting frame (51). The lifting body (53) is connected to the transmission screw (52).

3. The internal slit cutting device for the roof of a coal mine roadway according to claim 2, characterized in that: The depth adjustment mechanism (4) includes a guide rod (41), a connecting rod (42), a clamp (43), and a support rod body (44). The clamp (43) is fixed on the upper end of the lifting frame (51). The support rod body (44) is located on the lifting body (53), and the clamp (43) and the support rod body (44) are correspondingly arranged on one side of the lifting frame (51). The lower end of the connecting rod (42) is connected to the support rod body (44), and the upper end is connected to the guide rod (41). The guide rod (41) and the connecting rod (42) pass through the clamp (43) and are movably connected to the clamp (43). A rotating wheel (31) is connected to the upper end of the guide rod (41).

4. The internal slit cutting device for the roof of a coal mine roadway according to claim 3, characterized in that: The clamp (43) includes a clamp body (431), an extrusion plate (432), a rotating column (433), and a second drive (434). The clamp body (431) is fixed on the lifting frame (51) and has a frame structure. The extrusion plate (432) is located inside the clamp body (431) and is slidably connected to the clamp body (431). The side wall of the clamp body (431) is provided with a sliding groove (4311) that cooperates with the extrusion plate (432). One end of the rotating column (433) is connected to the second drive (434), and the other end passes through the clamp body (431) and is connected to the extrusion plate (432). The extrusion plate (432) and one side wall of the clamp body (431) form a clamping opening (435). A friction pad (436) is provided on the extrusion surface of the clamping opening (435).

5. A coal mine roadway roof internal slit cutting device according to claim 4, characterized in that: The connecting rod (42) is composed of multiple connecting rod segments (421) connected together. The upper end of each connecting rod segment (421) is provided with a threaded connector (4211), and the lower end is provided with a threaded hole (4212). The connecting rod segment (421) is also provided with a limiting hole (4213) located above the threaded hole (4212). Adjacent connecting rod segments (421) are threadedly connected to the threaded hole (4212) through the connector (4211); the guide rod (41) The lower end is provided with a threaded hole (411), and the guide rod (41) and the connecting rod (42) are threadedly connected to the connector (4211) through the threaded hole (411); the support rod body (44) is provided with a connecting rod groove (441), and the side wall of the connecting rod groove (441) is provided with a through fixing groove (442). A locking rod (443) is inserted into the fixing groove (442), and the locking rod (443) cooperates with the limiting hole (4213) to limit the lower end of the connecting rod (42).

6. The internal slit cutting device for the roof of a coal mine roadway according to claim 5, characterized in that: The depth adjustment mechanism (4) also includes a top support (45), which is fixed on the lifting frame (51). When working, its output end cooperates with the roof or the sidewall.

7. A coal mine roadway roof internal slit cutting device according to claim 3 or 6, characterized in that: The cutting mechanism (3) also includes a micro drive (33). The upper end of the guide rod (41) is provided with a rotating wheel groove (412). The rotating wheel (31) is located in the rotating wheel groove (412) and is rotatably connected to the rotating wheel groove (412). The micro drive (33) is located outside the rotating wheel groove (412) and is connected to the rotating wheel (31).

8. A coal mine roadway roof internal slit cutting device according to claim 1, characterized in that: The translation mechanism (7) includes a translation body (71), a moving plate (72), a threaded column (73), a support plate (74), and a third drive (75). The translation body (71) is fixed on the rotary table (2). The threaded column (73) is located inside the translation body (71) and one end is connected to the third drive (75). The moving plates (72) are symmetrically arranged at both ends of the threaded column (73). The inner sidewalls of the translation body (71) along the length direction of the threaded column (73) are provided with support plates (74). The support plates (74) are located below the moving plates (72) and support the moving plates. The outer sidewalls of the translation body (71) along the length direction of the threaded column (73) are provided with limiting grooves (76).

9. A coal mine roadway roof internal slit cutting device according to claim 1, characterized in that: The rotating mechanism (6) includes a rotating body (61), a driving wheel (62), a driven wheel (63), a transmission chain (64), and a fourth drive (65). The rotating body (61) is connected to the moving plate (72). The fourth drive (65) is located above the rotating body (61). The output end of the fourth drive (65) is connected to the driving wheel (62). The driven wheel (63) is connected to the driving wheel (62) via the transmission chain (64). The driven wheel (63) is located inside the rotating body (61). The output end of the driven wheel (61) extends out of the rotating body (61) and is connected to the lifting frame (51). The lower end of the rotating body (61) is provided with a T-slot (611). The T-slot (611) cooperates with the moving plate (72) and the limiting groove (76) and is slidably connected with the limiting groove (76).

10. The working method of the internal slit cutting device for the roof of a coal mine roadway according to any one of claims 1 to 9, characterized in that: Includes the following steps: S1. Drill blast holes (100) in the roof (200) of the roadway in the advanced working face, with the blast holes (100) along the roadway direction; S2. Place the lower end of the guide rod (41) with the rotating wheel (31) installed into the clamp (435) of the fixture, clamp and fix it, and then start the translation mechanism (7) according to the distance between the blast holes to adjust the distance between the two rotating wheels (31) so that the distance between the rotating wheels (31) adapts to the distance between the blast holes (100). After completion, install the cutting rope (32). S3. Based on the angle of the borehole (100), start the rotating mechanism (6) and adjust the angle of the guide rod (41) so that the angle of the guide rod (41) is adapted to the angle of the borehole (100); S4. Start the rotary table 2 to make the translation mechanism (7) perpendicular to the roadway direction, and start the moving chassis (1) so that the two rotating wheels (31) are respectively located in the two adjacent blast holes (100). Then start the top support body (45), and the top support body (45) extends to support the roof plate (200) or the roadway side. S5. Connect the connecting rod (42) to the guide rod (41). The bottom end of the connecting rod (42) is located in the connecting rod groove (441) of the support rod body (44) and fixed with the locking rod (443). Loosen the clamp (435) of the clamp and then start the micro motor (33). The rotating wheel (31) drives the cutting rope (32) to rotate the cutting top plate (200). At the same time, the lifting mechanism (5) is started. The lifting body (53) drives the support rod body (44) to rise slowly, so that the rotating wheel (31) and the cutting rope (32) gradually penetrate into the cutting top plate (200). S6. When the support rod (44) approaches the bottom of the clamp (43), the lifting mechanism (5) stops, the clamp (43) retracts the clamp (435), fixes the connecting rod (42), pulls out the locking rod (443), releases the connection between the lower end of the first connecting rod branch (421) and the support rod (44), lowers the support rod (44), then connects the top of the second connecting rod branch (421) to the first connecting rod branch (421) mentioned above, puts the bottom end into the connecting rod groove (441) of the support rod and fixes it with the locking rod (443), then loosens the clamp (435) of the clamp, starts the lifting mechanism (5) to slowly lift the support rod (44), so that the rotating wheel (31) and the cutting rope (32) continue to penetrate deeper into the cutting top plate (200); S7. Based on the cutting depth, repeat step S6 to connect multiple connecting rods (421) until the predetermined cutting depth is reached. S8. After the cutting is completed, start the lifting mechanism (5) to rotate in the opposite direction so that the support rod body (44) moves downward, and cooperate with the clamp (43) to remove the connecting rods and sub-rods (421) one by one until all connecting rods and sub-rods (421) are removed. S9. After the connecting rod (42) is removed, the moving chassis (1) drives the device to the next blast hole position where the top plate needs to be cut. Repeat steps S2-S8 to continue cutting the top plate (200). S10. When cutting is no longer required, remove the connecting rod (42) and guide rod (41), reduce the distance between the two lifting mechanisms (5), adjust the rotating mechanism (6) and the rotating table (2), rotate the lifting mechanism (5) to a horizontal position, parallel to the direction of the roadway, reduce the space occupied by the device, and finally drive the mobile chassis (1) to move the device to the parking position.

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