Hydraulic support for coal seam with inclination angle of 50-90 degrees

Abstract

The utility model relates to the technical field of steeply inclined coal face support, in particular to a hydraulic support for a coal seam with an inclined angle of 50-90 degrees, which is used for mining support of a steeply inclined coal seam. The beveled base is reasonable and compact in structure and convenient to use, when a cylinder body of the supporting stand column is located on the beveled base side, a hinge seat hinged to the middle of the cylinder body of the supporting stand column is arranged on the upper portion of the beveled base, and when the cylinder body of the supporting stand column is located on the beveled top beam side, a hinge seat hinged to the middle of the cylinder body of the supporting stand column is arranged on the lower portion of the beveled top beam. According to the supporting stand column structure, the supporting stand column can be prevented from being damaged due to torsion under the action of gravity when the supporting stand column is in a nearly horizontal supporting state, the supporting stand column can better adapt to side horizontal type supporting operation, the support can directly move in the coal mining direction by means of the support, the support moving speed is high, and efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of support for steep coal mining faces, and is a hydraulic support for coal seams with an inclination angle of 50°-90°. Background Art

[0002] For traditional hydraulic supports in nearly horizontal working faces and gently inclined working faces, the inclination angle of the supports is not large, and the columns support perpendicular to the ground or with a small inclination angle to the ground. The movement of the hydraulic support relies on the push jack in the inclined cutting base of the support to pull the scraper conveyor at the front end of the inclined cutting base, thereby dragging the support forward. That is, the support moves forward by the traction of the scraper conveyor, and the coal seam is mined by a shearer riding on the scraper conveyor. Currently, the large inclination angle hydraulic supports in application still follow the above-mentioned support, support moving, and three-machine matching schemes for horizontal working faces, only adding a series of anti-toppling and anti-slip jacks to avoid the toppling of the support.

[0003] In working faces with a coal seam inclination angle greater than 70 degrees, it is very difficult to apply this kind of hydraulic support support and support moving scheme. Using the traditional three-machine matching longwall mining method in large inclination angle coal seams has been researching, solving, and overcoming a series of problems such as support anti-toppling and anti-slip, and anti-slip and toppling of shearers and scraper conveyors when the working face angle is large. In large inclination angle coal seams, especially coal seams with an angle gradually approaching 90 degrees, there has been no good solution for the traditional three-machine matching longwall mining method. There is still no effective solution for the mining of steep coal seams using traditional methods and processes. Some mines have tried to make the working face pseudo-inclined at a certain angle to reduce the downward sliding force of the three machines, so that this kind of three-machine layout form can be better applied in steep coal seams with an inclination angle of about 60 degrees. However, after the working face is pseudo-inclined, the scraper conveyor and the shearer increase the overturning force towards the coal wall of the working face, making the shearer and the scraper conveyor unable to be well applied in the pseudo-inclined working face. Therefore, there is currently no three-machine layout scheme that can be well applied in steep coal seams. Due to the high adaptability requirements and great difficulty of coal mining machinery and equipment in steep coal seam mining faces, the mining of steep coal seams in most mining areas develops slowly, the extraction rate is low, and resource waste is serious.

[0004] In the mining of steep coal seams, for steep coal seams with a coal seam thickness less than 8 meters and a coal seam inclination angle greater than 45 degrees, the flexible shield support mining method and the small-stage coal seam hydraulic support mining technology have been used, but both have defects and are no longer suitable for the use of this kind of coal seam. There has been no reliable and practical supporting support equipment and mining equipment for this kind of coal seam available for use. Currently, when encountering this kind of coal seam, mining has to be abandoned.

[0005] The arrangement of the flexible shield support mining method is to set a return air chute parallel to the horizontal plane in the upper part of the steeply inclined coal seam, and set a transport chute parallel to the horizontal plane at a certain distance from the return air chute. The pseudo-bevel cut eye runs through the upper and lower tunnels, and the angle between the pseudo-bevel cut eye and the horizontal plane is about 20 to 40 degrees. During the downward advancement of the flexible shield support, the lower shield support gradually enters the transport chute, and the support that enters the transport chute needs to be continuously transported to the upper return air chute for support replenishment, which is labor-intensive; in addition, this type of support is suitable for a small range of coal seam thickness. When the coal seam becomes thicker, coal will be lost, and it cannot be used when the coal seam becomes thinner. Different lengths of flexible shield supports need to be configured for different coal seam changes. There are many problems such as inconvenience in use, low mechanical mining efficiency, high labor intensity, low output, unstable support and poor safety. At present, this coal mining process and matching support equipment are rarely used in coal mines due to high labor intensity and low output.

[0006] The small-stage coal seam hydraulic support mining process is adopted. The tunnel layout of the support is to set a return air chute parallel to the horizontal plane in the middle and upper part of the steeply inclined coal seam, and set a transport chute parallel to the horizontal plane at the lower part about 20 meters away from the return air chute. A ventilation hole with a diameter of about 800mm is drilled every 6 meters between the upper and lower tunnels to make the upper and lower tunnels connected to form a U-shaped ventilation. The support is arranged in the lower transport chute, and the direction of the support is to move forward along the transport chute. In this arrangement, the ventilation holes at the rear and upper parts of the support cannot achieve U-shaped ventilation due to collapse damage or obstruction by the inclined top beam of the support. The ventilation holes at the front of the support can achieve U-shaped ventilation, but fresh air is difficult to reach the working position of the support. The working position of the support is a blind alley, which is easy to cause gas accumulation and bring great safety hazards. In 2016, the horizontal segmented top coal mining method of the steeply inclined 4 to 8 meter single thick coal seam could not build a safe U-shaped ventilation system and there was a risk of toxic and harmful gas accumulation on the working face, so it was eliminated by the coal safety inspection department. At present, this equipment and mining process have been completely discontinued.

[0007] The Chinese patent document with the publication number CN214303888U discloses a special hydraulic support for steeply inclined coal seams with a false dip. However, there are still defects in the use process. For example, the diagonal telescopic guide rods of adjacent hydraulic supports are connected together by dumbbell pins, and the connected diagonal telescopic guide rods are used to pull multiple hydraulic supports to move forward in sequence. This solution can achieve the forward movement of the diagonal base of the support by connecting dumbbell pins between the diagonal base telescopic guide rods. However, when dumbbell pins are used to connect the diagonal telescopic guide rods of the diagonal top beam of the support, the support cannot contract and relieve pressure to move the support because the diagonal top beams of the support are all connected together, and a single support cannot contract and relieve pressure. Therefore, there are great problems in the mutual restriction between the forward movement of the diagonal top beam of the support and the pressure relief and contraction of the diagonal top beam of the support. The use of the dumbbell pin structure for the diagonal top beam cannot make the diagonal top beam move forward, so the forward movement of the support is inconvenient. For example, if the support is a side-lying support and the support columns are nearly horizontally supported, the top end of the column rod body is still hinged to the diagonal top beam, and the bottom end of the column cylinder body is supported on the diagonal base through a column socket. When the support is horizontally supported, due to the large weight of the column, the seal between the column rod body and the cylinder body is subjected to a large torsional force under the action of gravity, which is extremely likely to cause damage to the seal of the column. Summary of the Invention

[0008] The utility model provides a hydraulic support for coal seams with an inclination angle of 50° - 90°, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problems of inconvenient support movement and easy damage of the nearly horizontal support of the support columns during the side-lying support of the existing steeply inclined coal seam support.

[0009] The technical solution of the utility model is realized by the following measures: A hydraulic support for coal seams with an inclination angle of 50° - 90°, used for the mining support of steeply inclined coal seams. A number of supports are arranged in parallel and stacked upward along the inclined direction of the transportation gateway and are mined and supported along the direction parallel to the transportation gateway. It is characterized in that it includes a diagonal top beam, a shielding device, and a diagonal base connected in sequence. There are a number of support columns between the diagonal top beam and the diagonal base. All the support columns are nearly horizontally supported. The middle part of the cylinder body of the support column is hinged to the diagonal top beam or the diagonal base, and the end of the piston rod of the support column is hinged to the diagonal base or the diagonal top beam. A support moving device is provided on each support, and after the support moving device operates, the support can move forward by one working distance.

[0010] The following is a further optimization and / or improvement of the above-mentioned technical solution of the utility model:

[0011] As a first preference, the support moving device may include a first support pulling oil cylinder and a second support pulling oil cylinder. One side end of the first support pulling oil cylinder of two adjacent diagonal top beams and one side end of the second support pulling oil cylinder of two adjacent diagonal bases are connected to the adjacent support together or directly connected to the adjacent support through a chain or a cross connecting rod or a rotary joint or a steel wire rope.

[0012] As a second preference, the above-mentioned support-shifting device may include a third support-pulling oil cylinder and a fourth support-pulling oil cylinder. One end of the third support-pulling oil cylinder on two adjacent angled top beams and one end of the fourth support-pulling oil cylinder on two adjacent angled bases are connected to the adjacent support by a fixed pulley mechanism and a steel wire rope.

[0013] The above-mentioned shielding device may include a shielding plug board and a horizontal plug board. The shielding plug board is hinged to the rear of the angled top beam, the horizontal plug board is hinged to the upper side of the rear of the angled top beam, and a shielding cavity for inserting the shielding plug board and the horizontal plug board is provided at the rear of the angled base.

[0014] A guide rod cavity may be provided at the front of the above-mentioned angled base. A telescopic guide rod is hinged to the middle of the front end of the angled top beam, and the other end of the telescopic guide rod is inserted into the guide rod cavity.

[0015] A support-shifting protection plate may be arranged on the side of the above-mentioned angled top beam. A number of first side-pushing oil cylinders are provided between the support-shifting protection plate and the angled top beam. A support-shifting beam is arranged on the side of the angled base, and a number of second side-pushing oil cylinders are provided between the support-shifting beam and the angled base.

[0016] The front ends of the above-mentioned angled top beam and the angled base may both be in an angled shape matching the slope of the working face. The shielding cavity at the rear end of the angled base is in an inclined shape parallel to the front ends of the angled top beam and the angled base. The shielding plug board hinged to the angled top beam is in a corresponding inclined hinge connection with the shielding cavity of the angled base.

[0017] The structure of the present utility model is reasonable and compact, and it is convenient to use. When the cylinder body of the support column is located on the side of the angled base, a hinge seat hinged to the middle of the cylinder body of the support column is provided on the upper part of the angled base; when the cylinder body of the support column is located on the side of the angled top beam, a hinge seat hinged to the middle of the cylinder body of the support column is provided on the lower part of the angled top beam. This support column structure can avoid damage to the support column caused by torsion under the action of gravity when the support column is in a nearly horizontal support, enabling the support column to better adapt to the side-lying support operation. The support of the present application can directly move along the coal mining direction relying on the support itself, with a fast support-shifting speed and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Att Figure 1 is a schematic side view of the best embodiment of the present utility model.

[0019] Att Figure 2 is Figure 1 the top view of the hydraulic support for coal seams with an inclination angle of 50° - 90° in Att

[0020] Att Figure 3 is Figure 2 the A-A cross-sectional view of Att

[0021] Att Figure 4 isFigure 2 Cross-sectional view taken along line B-B

[0022] Attached Figure 5 is the attached Figure 2 Front view of the bevel-cut top beam in the attached

[0023] Attached Figure 6 is the attached Figure 2 View from direction C of the attached

[0024] Attached Figure 7 Schematic side view of the connection between two adjacent bevel-cut top beams in the first preferred embodiment of the present utility model

[0025] Attached Figure 8 Schematic side view of the connection between two adjacent bevel-cut bases in the first preferred embodiment of the present utility model

[0026] Attached Figure 9 Schematic side view of the connection between two adjacent bevel-cut top beams in the second preferred embodiment of the present utility model

[0027] Attached Figure 10 Schematic side view of the connection between two adjacent bevel-cut bases in the second preferred embodiment of the present utility model

[0028] Attached Figure 11 Schematic diagram when the existing support column is vertically supported or nearly vertically supported

[0029] Attached Figure 12 Schematic diagram when the existing support column is horizontally supported or nearly horizontally supported

[0030] Attached Figure 13 Schematic diagram when the support column in the present utility model is horizontally supported or nearly horizontally supported

[0031] The codes in the attached drawings are respectively: 1 is the support column, 2 is the bevel-cut top beam, 3 is the bevel-cut base, 4 is the first hydraulic support cylinder, 5 is the second hydraulic support cylinder, 6 is the third hydraulic support cylinder, 7 is the fourth hydraulic support cylinder, 8 is the steel wire rope, 9 is the fixed pulley mechanism, 10 is the shielding flap, 11 is the horizontal flap, 12 is the shielding cavity, 13 is the telescopic guide rod, 14 is the guide rod cavity, 15 is the support adjusting guard plate, 16 is the first side push cylinder, 17 is the support adjusting beam, 18 is the second side push cylinder, 19 is the coal seam, 20 is the transportation gate roadway, 21 is the return air gate roadway, 22 is the working face Detailed implementation manners

[0032] The present utility model is not limited by the following embodiments, and the specific implementation manners can be determined according to the technical solution of the present utility model and the actual situation

[0033] In the present utility model, for the convenience of description, the description of the relative position relationship of each component is based on the attached drawings of the specification Figure 1It is described in terms of the layout method in the coal mining direction. For example, the positional relationships such as front, back, up, down, left, and right are based on the attached drawings of the specification. Figure 1 The layout direction in the coal mining direction in the attached drawings is used to determine. Figure 1 In the attached drawings, the arrow indicates that the coal mining direction is forward.

[0034] The present utility model will be further described below in conjunction with embodiments and the attached drawings:

[0035] Embodiment 1: As shown in the attached drawings Figures 1 to 10 The hydraulic support for coal seams with an inclination angle of 50° - 90° is used for the support in the mining of steeply inclined coal seams. A plurality of supports are arranged in a stacked manner obliquely upward parallel to the transportation gateway 20 and mined and supported along the direction parallel to the transportation gateway 20. It is characterized in that it includes a bevel cutting roof beam 2, a shielding device, and a bevel cutting base 3 connected in sequence. There are a plurality of support columns 1 arranged between the bevel cutting roof beam 2 and the bevel cutting base 3. The plurality of support columns 1 are all nearly horizontally supported. The middle part of the cylinder body of the support column 1 is hinged to the bevel cutting roof beam 2 or the bevel cutting base 3, and the end of the piston rod of the corresponding support column 1 is hinged to the bevel cutting base 3 or the bevel cutting roof beam 2. A support moving device is provided on each support. After the support moving device operates, the support can move forward by a working distance.

[0036] The plurality of support columns 1 are all nearly horizontally supported, and the included angle between each support column 1 and the horizontal plane is between 0° and 30°.

[0037] At least one row of support column groups is hinged between the bevel cutting roof beam 2 and the bevel cutting base 3. Each row of support column groups includes two parallel support columns 1. When the pressure on the bevel cutting roof beam 2 of the support is large, two rows of support column groups (each row of support column groups has two support columns 1) can be set to increase the working resistance of the bevel cutting roof beam 2 of the support and improve the supporting force at the front end of the support. The support column 1 is improved on the basis of the existing well-known support column.

[0038] The structure of the present utility model is reasonable and compact, and it is convenient to use. When the cylinder body of the support column 1 is located on the side of the bevel cutting base, an articulated seat for hinging the middle part of the cylinder body of the support column 1 is provided on the upper part of the bevel cutting base 3; when the cylinder body of the support column 1 is located on the side of the bevel cutting roof beam 2, an articulated seat for hinging the middle part of the cylinder body of the support column 1 is provided on the lower part of the bevel cutting roof beam 2. This support column structure can avoid the seal damage of the support column 1 caused by torsion under the action of gravity when the support column 1 is nearly horizontally supported, enabling the support column 1 to better adapt to the side-lying support operation. The support of this application can directly move along the coal mining direction by relying on the support itself, with a fast support moving speed and high efficiency.

[0039] A haulage gateway 20 is horizontally arranged below the inclined coal seam 19, a return air gateway 21 is horizontally arranged at a certain distance above the haulage gateway 20, a working face 22 is inclinedly arranged between the extraction gateway and the haulage gateway 20, the included angle between the working face 22 and the haulage gateway 20 is between 30 degrees and 45 degrees, and supports a, b, c, and d are horizontally stacked and pressed in sequence along the upward inclination of the working face 22.

[0040] As Figure 1 shown, the support a has been horizontally moved forward by a working distance. After the moving support device connected between the support a and the support b acts (contracts), the support b can be pulled to horizontally move forward by a working distance. Similarly, by contracting the moving support device connected between the support b and the support c, the support c can be pulled to horizontally move forward by a working distance. By implementing in this way, the horizontal movement of the support d and other supports of the working face 22 can be realized.

[0041] The support column 1 has attachments Figure 11 , 12 , 13 three ways. Figure 11 Figure 11 is the way when the traditional support column is vertically supported. The support points are the upper spherical surface of the column rod body and the lower spherical surface of the column cylinder body. The column is subjected to a vertically downward pressure, and there is no lateral rotation moment on the column. Therefore, the column seal is not affected by the lateral rotation moment, the column seal is in a good stress state and is not easy to be damaged. However, the support column 1 between the bevel cut top beam 2 and the bevel cut base 3 of this support is not suitable for being arranged along the vertical direction.

[0042] When the support column 1 is horizontally placed, that is, as shown in the attachment Figure 12 Figure 12 , the support points of the support column 1 are the end spherical surfaces of the rod body of the support column 1 and the end spherical surfaces of the cylinder body of the support column 1. In addition to being horizontally compressed, the cylinder body of the support column 1 is subjected to a clockwise moment around the support point under the action of gravity, and the rod body of the support column 1 is subjected to a counterclockwise moment around the support point. Under the interaction of the moments of the rod body and the cylinder body of the support column 1, the seal of the mating surface between the cylinder body and the rod body of the support column 1 bears a large superimposed steering moment of the cylinder body and the rod body. This moment will cause the seal of the support column 1 to be quickly damaged, resulting in liquid leakage and pressure relief of the support column 1. Therefore, the support column 1 with this structure is not suitable for the occasions where the support column 1 is laterally supported and horizontally supported.

[0043] According to the way shown in the attachment Figure 13 Figure 13 , the support point at the bottom of the cylinder body of the support column 1 is moved forward to the middle position of the cylinder body of the support column 1 (the specific position is based on the balance of the weights of the cylinder body and the rod body compared to the support point). At this time, the force on the support column 1 is as shown in the attachment Figure 13 Figure 13 , the horizontal pressure on the support column 1 is the same as that in the attachment Figure 12The same. The cylinder body of the support column 1 has a counterclockwise moment around the support point under the action of gravity, and at the same time, the rod body of the support column 1 has a counterclockwise moment around the support point under the action of gravity. The two acting moments of the support column 1 cancel each other out, resulting in a zero or very small combined moment on the sealing member at the mating surface of the cylinder body and the rod body of the support column 1. Thus, the damage to the sealing member caused by gravity is greatly reduced, enabling the support column 1 to work in a horizontal state without being damaged.

[0044] According to actual needs, the above hydraulic support for coal seams with an inclination angle of 50° - 90° can be further optimized and / or improved:

[0045] Embodiment 2: As an optimization of Embodiment 1, as shown in the appendix Figures 1 to 8 As shown, the support moving device includes a first support pulling oil cylinder 4 and a second support pulling oil cylinder 5. One side end of the first support pulling oil cylinders 4 of two adjacent beveled top beams 2 and one side end of the second support pulling oil cylinders 5 of two adjacent beveled bases 3 are connected to an adjacent support together or directly connected to the adjacent support through a chain or a cross connecting rod or a rotary joint or a steel wire rope.

[0046] In this way, after the first support pulling oil cylinder 4 and the second support pulling oil cylinder 5 contract, the rapid movement of the support can be realized, getting rid of the need for the conventional three-machine matching of the support to rely on external coal shearers, scraper conveyors, and external traction mechanisms to move the support, enabling the support to break free from the constraints of the coal mining and conveying mechanisms, and enabling the support to match various coal mining equipment and conveying equipment, thus making the support matching more flexible and diverse.

[0047] According to requirements, two adjacent beveled top beams 2 are connected to an adjacent support together or directly connected to the adjacent support through a first support pulling oil cylinder 4 and a known chain or a cross connecting rod or a rotary joint or a steel wire rope. The piston rod end of the first support pulling oil cylinder 4 is connected to one end of the chain or the cross connecting rod or the rotary joint or the connecting piece, and the other end of the chain or the cross connecting rod or the rotary joint or the connecting piece is connected to the corresponding adjacent beveled top beam 2. Two adjacent beveled top beams 2 can also be connected together through a first support pulling oil cylinder 4 and a known steel wire rope, and two adjacent beveled top beams 2 can also be directly connected together through a first support pulling oil cylinder 4.

[0048] Two bevel bases 3 at adjacent positions are connected together by a second bracket cylinder 5 and a known chain or cross connecting rod or rotary joint or connecting piece. The end of the piston rod of the second bracket cylinder 5 is connected to one end of the chain or cross connecting rod or rotary joint or connecting piece, and the other end of the chain or cross connecting rod or rotary joint or connecting piece is connected to the corresponding bevel base 3. Two bevel bases 3 at adjacent positions can also be connected together by a second bracket cylinder 5 and a known steel wire rope, and two bevel bases 3 at adjacent positions can also be directly connected together by a second bracket cylinder 5.

[0049] Embodiment 3: As another optimization of Embodiment 2, the difference between this embodiment and Embodiment 2 lies only in the support moving device. As shown in FIGS. Figures 1 to 6 9, 10, the support moving device includes a third bracket cylinder 6 and a fourth bracket cylinder 7. One side ends of the third bracket cylinders 6 of two adjacent bevel roof beams 2 and one side ends of the fourth bracket cylinders 7 of two adjacent bevel bases 3 are connected to adjacent supports through a fixed pulley mechanism 9 and a steel wire rope 8.

[0050] This can solve the problem of support moving when the side-lying support in steeply inclined coal seams is in use. When the support is in the backstepping operation on the working face 22 with a large angle in the steeply inclined coal seam, the supports are arranged in a stacked manner parallel to the transportation gateway 20 and inclined upward. That is, each support is in a side-lying support mode. The lower side surfaces of the bevel roof beam 2 and the bevel base 3 of the support are sliding moving surfaces. This arrangement can adapt to various supporting forms such as mining with a shearer cooperating with a scraper conveyor in downward mining, or mining with a small milling and excavation equipment, or mining with a milling and excavation arm hung at the front end of the bevel base 3 and swinging between the bevel roof beam 2 and the bevel base 3. The support must rely on its own movement to achieve mining support, and is not connected to the mining equipment and transportation equipment in front of the support, does not rely on these equipment to move the support, and does not need to be closely matched with these equipment.

[0051] One side ends of the third bracket cylinders 6 of two adjacent bevel roof beams 2 and one side ends of the fourth bracket cylinders 7 of two adjacent bevel bases 3 are connected to adjacent supports through the steel wire rope 8 of the fixed pulley mechanism 9.

[0052] There is no mutual interference between the bevel roof beams 2 in this application. The bevel roof beam 2 of the support can smoothly contract and relieve pressure. The bevel roof beam 2 and the bevel base 3 both use known jacks for support moving, which can enable the support to smoothly move forward by being pulled by adjacent supports.

[0053] Embodiment 4: As an optimization of the above embodiments, as shown in FIGS. Figure 1 、 2As shown in the figure, the shielding device includes a shielding plug board 10 and a horizontal plug board 11. The shielding plug board 10 is hinged to the rear of the bevel cutting roof beam 2, and the horizontal plug board 11 is hinged to the upper side of the rear of the bevel cutting roof beam 2. A shielding cavity 12 for inserting the shielding plug board 10 and the horizontal plug board 11 is provided at the rear of the bevel cutting base 3.

[0054] A shielding cavity 12 is provided at the rear of the bevel cutting base 3. In this way, the rear shielding plug board 10 and the horizontal plug board 11 can slide in the shielding cavity 12 along with the telescopic movement of the support column 1, which can shield and block the coal and gangue falling at the rear, and can also realize the telescopic movement between the bevel cutting roof beam 2 and the bevel cutting base 3. In this way, it can play a complete shielding role for the goaf, and can well shield and block the coal and gangue falling at the rear from entering the working face 22. According to requirements, the shielding plug board 10 and the horizontal plug board 11 can also be hinged to the rear of the bevel cutting base 3, and a shielding cavity 12 for inserting the shielding plug board 10 and the horizontal plug board 11 is provided at the rear of the bevel cutting roof beam 2. The shielding cavity 12 includes an inclined-angle cavity body and a horizontal cavity body provided at the rear of the bevel cutting base 3 or the bevel cutting roof beam 2, and the shielding plug board 10 and the horizontal plug board 11 are respectively inserted into the inclined-angle cavity body and the horizontal cavity body.

[0055] Example Five: As an optimization of the above embodiment, as shown in Figures 2 to 4 Figures 6 to 10, a guide rod cavity 14 is provided at the front of the bevel cutting base 3, and a telescopic guide rod 13 is hinged to the middle of the front end of the bevel cutting roof beam 2, and the other end of the telescopic guide rod 13 is inserted into the guide rod cavity 14.

[0056] The guide rod cavity 14 matches the telescopic guide rod 13. In this way, the other end of the telescopic guide rod 13 is inserted into the guide rod cavity 14, and the inner wall of the guide rod cavity 14 plays a constraining role on the telescopic guide rod 13, so as to ensure the support stability of the support and resist the shear force generated during the inclined direction and walking. According to requirements, the telescopic guide rod 13 can also be hinged to the middle of the front end of the bevel cutting base 3, the guide rod cavity 14 is provided at the front of the bevel cutting roof beam 2, and the other end of the telescopic guide rod 13 is inserted into the guide rod cavity 14.

[0057] Example Six: As an optimization of the above embodiment, as shown in Figure 3 Figures 5 6, 8, 10, a support adjusting guard plate 15 is provided on the side of the bevel cutting roof beam 2, and a plurality of first side push oil cylinders 16 are provided between the support adjusting guard plate 15 and the bevel cutting roof beam 2. A support adjusting beam 17 is provided on the side of the bevel cutting base 3, and a plurality of second side push oil cylinders 18 are provided between the support adjusting beam 17 and the bevel cutting base 3.

[0058] In this way, by connecting the first side push oil cylinders 16 and the second side push oil cylinders 18 to the bevel cutting roof beam 2 and the bevel cutting base 3, the support can be adjusted to avoid the inclination of the support.

[0059] Example Seven: As an optimization of the above embodiment, as shown in Figure 1 Figures 7As shown in FIGS. 0 to 10, the front ends of the bevel-cut roof beam 2 and the bevel-cut base 3 are both beveled at an angle matching the slope of the working face. The rear cover cavity of the bevel-cut base 3 is inclined parallel to the front ends of the bevel-cut roof beam 2 and the bevel-cut base 3. The shielding flap 10 hinged to the bevel-cut roof beam 2 is inclinedly hinged to the cover cavity of the bevel-cut base 3 correspondingly.

[0060] The included angle between the working face 22 and the transportation gateway 20 is between 30 degrees and 45 degrees. In this way, the supports are arranged horizontally and stacked obliquely upward along the 30-degree to 45-degree pseudo-inclined cutting eye. The supports are arranged on the working face 22 parallel to the transportation gateway 20 and upward along the pseudo-inclined cutting eye. Since the inclination angle of the working face 22 is small, the phenomenon of coal and gangue rolling and flying downward from the upper mining is reduced. The overturning force on the support is offset by the coal wall of the pseudo-inclined cutting eye, so that the support can always be in a stable working state on the working face 22.

[0061] The working face 22 can be mined by a shearer for downward mining in cooperation with a scraper conveyor. The working face 22 can also be mined by a small milling and excavation equipment. The working face 22 can also be equipped with a milling and excavation arm that swings between the bevel-cut roof beam 2 and the bevel-cut base 3 and is hung at the front end of the bevel-cut base 3. The front end of the milling and excavation arm is equipped with a milling and excavation head. The milling and excavation arm relies on the oil cylinder on the bevel-cut base 3 to realize the swinging mining and excavation form. The working face 22 can also be mined by other mining and excavation equipment that is not connected to the support. The support only plays a role in supporting the working face 22. The movement of the support is realized after the support moving device acts. The support does not rely on other equipment such as shearers, scraper conveyors, external traction mechanisms, etc. for movement.

[0062] The above technical features constitute the embodiments of the present utility model, which have strong adaptability and implementation effects. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

Claims

1. A hydraulic support for coal seams with an inclination angle of 50° - 90°, used for supporting the mining of steeply inclined coal seams. A number of supports are arranged in parallel and stacked on top of each other obliquely upward along the transportation gate roadway, and mining support is carried out along the direction parallel to the transportation gate roadway. It is characterized in that It includes an inclined cutting roof beam, a shielding device and an inclined cutting base which are connected in sequence. There are several support columns arranged between the inclined cutting roof beam and the inclined cutting base. All of the several support columns are nearly horizontally supported. The middle part of the cylinder body of the support column is hinged to the inclined cutting roof beam or the inclined cutting base, and the end of the piston rod of the support column is hinged to the inclined cutting base or the inclined cutting roof beam. A support moving device is provided on each support. After the support moving device acts, the support can move forward by a working distance.

2. The hydraulic support for coal seams with an inclination angle of 50° - 90° according to claim 1, characterized in that The support moving device includes a first support pulling oil cylinder and a second support pulling oil cylinder. One side ends of the first support pulling oil cylinders of two adjacent inclined cutting roof beams and one side ends of the second support pulling oil cylinders of two adjacent inclined cutting bases are connected to the adjacent support together or directly connected to the adjacent support through a chain or a cross connecting rod or a rotary joint or a steel wire rope.

3. The hydraulic support for a coal seam with an inclination angle of 50° - 90° according to claim 1, characterized in that The support moving device includes a third support pulling oil cylinder and a fourth support pulling oil cylinder. One side ends of the third support pulling oil cylinders of two adjacent inclined cutting roof beams and one side ends of the fourth support pulling oil cylinders of two adjacent inclined cutting bases are connected to the adjacent support together through a fixed pulley mechanism plus a steel wire rope.

4. The hydraulic support for a coal seam with an inclination angle of 50° - 90°, according to claim 1 or 2 or 3, characterized in that The shielding device includes a shielding plug board and a horizontal plug board. The shielding plug board is hinged to the rear part of the inclined cutting roof beam, the horizontal plug board is hinged to the upper side of the rear part of the inclined cutting roof beam, and a shielding cavity for inserting the shielding plug board and the horizontal plug board is provided at the rear part of the inclined cutting base.

5. The hydraulic support for coal seams with an inclination angle of 50°-90° according to claim 4, characterized in that A guide rod cavity is provided at the front part of the inclined cutting base. A telescopic guide rod is hinged to the middle part of the front end of the inclined cutting roof beam, and the other end of the telescopic guide rod is inserted into the guide rod cavity.

6. The hydraulic support for a coal seam with an inclination angle of 50° - 90° according to claim 1 or 2 or 3 or 5, characterized in that A support adjusting guard plate is arranged on the side of the inclined cutting roof beam. There are several first side pushing oil cylinders arranged between the support adjusting guard plate and the inclined cutting roof beam. A support adjusting beam is arranged on the side of the inclined cutting base. There are several second side pushing oil cylinders arranged between the support adjusting beam and the inclined cutting base.

7. The hydraulic support for coal seams with an inclination angle of 50° - 90° according to claim 4, characterized in that A support adjusting guard plate is arranged on the side of the inclined cutting roof beam. There are several first side pushing oil cylinders arranged between the support adjusting guard plate and the inclined cutting roof beam. A support adjusting beam is arranged on the side of the inclined cutting base. There are several second side pushing oil cylinders arranged between the support adjusting beam and the inclined cutting base.

8. The hydraulic support for a coal seam with an inclination angle of 50° - 90° according to claim 4, characterized in that The front ends of the inclined cutting roof beam and the inclined cutting base are both in the shape of an inclined angle matching the slope of the working face. The rear shielding cavity of the inclined cutting base is in an inclined shape parallel to the front ends of the inclined cutting roof beam and the inclined cutting base. The shielding plug board hinged to the inclined cutting roof beam is in a corresponding inclined hinge connection with the shielding cavity of the inclined cutting base.

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