CN112879063B - Method for safely and rapidly retracting hydraulic support of fully-mechanized coal mining face - Google Patents
Method for safely and rapidly retracting hydraulic support of fully-mechanized coal mining face Download PDFInfo
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- CN112879063B CN112879063B CN202110095715.XA CN202110095715A CN112879063B CN 112879063 B CN112879063 B CN 112879063B CN 202110095715 A CN202110095715 A CN 202110095715A CN 112879063 B CN112879063 B CN 112879063B
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- 239000003245 coal Substances 0.000 title claims abstract description 54
- 238000005065 mining Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000008093 supporting effect Effects 0.000 claims description 50
- 239000002023 wood Substances 0.000 abstract description 15
- 238000003780 insertion Methods 0.000 abstract description 6
- 230000037431 insertion Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000010878 waste rock Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
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- Fluid-Pressure Circuits (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention relates to a method for safely and quickly withdrawing a hydraulic support of a fully mechanized coal mining face, which comprises the steps of using a special support for safely and quickly withdrawing the fully mechanized coal mining face to assist the hydraulic support to withdraw, combining a first support and a second support, withdrawing the hydraulic support, and sequentially withdrawing the hydraulic support through a hydraulic pushing device; the support is protected through the side swing beam, the first rear swing beam and the second rear swing beam, the support base is lifted through the cooperation of the insertion beam, the first rear insertion beam and the second rear insertion beam, the support base is convenient to move, and temporary support is carried out through the side guard plate, the telescopic beam, the first front telescopic beam and the second front telescopic beam; the invention does not need to erect a wood pile any more, does not need workers to operate in a triangular area with an unsupported top plate, has good safety performance and high withdrawal speed, can greatly improve the production efficiency of coal mine enterprises, saves cost, is suitable for withdrawing hydraulic supports of a single or multiple channels fully mechanized coal mining face, has the withdrawal efficiency which is more than 3 times of that of a method for erecting the wood pile, and has popularization and use values.
Description
Technical Field
The invention relates to the field of coal mining methods, in particular to a method for safely and rapidly retracting a hydraulic support of a fully mechanized coal mining face.
Background
The fully-mechanized coal mining hydraulic support is important equipment in the fully-mechanized coal mining complete equipment, the quantity is large, equipment such as a coal cutter, a scraper machine and the fully-mechanized coal mining hydraulic support needs to be moved from one working surface to the next surface to be mined at the stope of the fully-mechanized coal mining complete equipment, and the fully-mechanized coal mining hydraulic support in the fully-mechanized coal mining complete equipment is retracted, so that the fully-mechanized coal mining hydraulic support has the characteristics of large workload, heavy task, high cost, high safety risk and the like.
Because the coal gangue and the like which fall off are accumulated behind and beside the hydraulic support, the hydraulic support belongs to a pressure centralized display area, the working condition is bad, and especially the control of a triangular area in the retracting process is a safe key point, and is also a key point that materials such as wood piles and the like consume most, use manpower most, consume the longest time and influence the retracting, the traditional fully-mechanized mining support retracting process and equipment have the following defects:
the safety is low: by adopting the wood pile support, personnel need to operate under the condition of not supporting the top plate, so that the safety risk exists, the stability of the wood pile is poor, the support strength is low, the top plate of the retraction triangle cannot be actively supported, and the performance of supporting and protecting the top plate is poor;
the efficiency is low, the manual construction of the wood pile is long in time and low in efficiency, and the working face is retracted for a long time, so that the production efficiency of the coal mine is greatly affected;
the cost is high, and the data show that the dosage value of the wood pile used for retracting the fully mechanized mining face with the height of 4.5 meters and the width of 9.5 meters and the length of 240-300 meters is about 80-100 ten thousand yuan, the wood pile is not recyclable, is directly buried underground, and the material waste is serious.
In a word, the existing fully-mechanized coal mining face support retracting mode is not suitable for the requirements of rapid retraction of the high-yield and high-efficiency fully-mechanized coal mining face in the aspects of safety, efficiency and the like.
Disclosure of Invention
In order to solve the problems, the invention provides the following technical scheme:
a method for safely and quickly retracting a hydraulic support of a fully mechanized coal mining face of a coal mine uses a special support for safely and quickly retracting the fully mechanized coal mining face of the coal mine to assist the hydraulic support to retract;
the special support for safely and quickly retracting the fully mechanized coal mining face comprises a first support and a second support, wherein the first support comprises a first base, a first hydraulic prop and a first top beam, the bottom of the first hydraulic prop is connected with the first base, the top of the first hydraulic prop is connected with the first top beam, a plurality of first hydraulic props are symmetrically arranged on the first base; the second support comprises a second base, second hydraulic support columns and second top beams, the bottoms of the second hydraulic support columns are connected with the second base, the tops of the second hydraulic support columns are connected with the second top beams, and the second hydraulic support columns are symmetrically arranged on the second base; the right side of the first base is connected with the left side of the second base by a hydraulic pushing device;
the method for safely and rapidly withdrawing the hydraulic support of the fully mechanized coal mining face comprises the following steps:
s1: withdrawing the first set of hydraulic mounts;
s2: moving the first bracket into a position where the first group of hydraulic brackets are withdrawn;
s3: lifting the first hydraulic prop to reach a preliminary supporting state;
s4: withdrawing the third group of hydraulic supports;
s5: moving the second bracket into a position where the third group of hydraulic brackets are withdrawn;
s6: lifting the second hydraulic prop to reach a primary supporting state;
s7: withdrawing the second set of hydraulic supports;
s8: two ends of the hydraulic pushing device are respectively arranged on the right side of the first base and the left side of the second base;
s9: lowering the first hydraulic prop to make the first top beam leave the top plate;
s10: the hydraulic pushing device is retracted, so that the first bracket moves rightwards by the supporting width of a group of hydraulic brackets;
s11: lifting the first hydraulic prop to reach a preliminary supporting state;
s12: withdrawing the hydraulic support at the right side of the second support;
s13: lowering the second hydraulic prop to make the second top beam leave the top plate;
s14: pushing the hydraulic pushing device to enable the second bracket to move rightwards by the supporting width of the group of hydraulic brackets;
s15: lifting the second hydraulic prop to reach a primary supporting state;
s16: lowering the first hydraulic prop to make the first top beam leave the top plate;
s17: the hydraulic pushing device is retracted, so that the first bracket moves rightwards by the supporting width of a group of hydraulic brackets;
s18: lifting the first hydraulic prop to reach a preliminary supporting state;
and S19, repeating the steps S12-S18 until the hydraulic support on the right side of the second support is completely withdrawn, and disassembling the hydraulic pushing device to sequentially withdraw the second support and the first support.
Further, a plurality of side swing beams are arranged on the left side of the first top beam, the plurality of side swing beams are coplanar, the plane where the side swing beams are located extends downwards along the first top beam and forms an included angle with the plane where the first top beam is located, the included angle is 120-150 degrees, an inserting beam is arranged in the side swing beam, and the inserting beam is connected with the side swing beam through a hydraulic device and can stretch out and draw back relative to the side swing beam;
the S3 further comprises a side swing beam which is supported;
s9 further comprises an inserting beam;
s10 further comprises a plug-in beam.
Further, a plurality of telescopic beams are arranged on the right side of the second top beam, the telescopic beams are connected with the second top beam through a hydraulic device, and the telescopic beams can be telescopic relative to the second top beam;
the S12 further comprises a telescopic beam extending out;
the step S13 further comprises the step of contracting the telescopic beam.
Further, a first back swing beam is arranged on the rear side of the first top beam, the plane of the first back swing beam extends downwards along the first top beam and forms an included angle with the plane of the first top beam, and the included angle is 120-150 degrees; correspondingly, a second back swing beam is arranged on the rear side of the second top beam, the plane of the second back swing beam extends downwards along the second top beam and forms an included angle with the plane of the second top beam, and the included angle is 120-150 degrees; the first rear swing beam is internally provided with a first rear insert beam, and is connected with the first rear swing beam through a hydraulic device and can stretch and retract relative to the first rear swing beam; correspondingly, a second rear insert beam is arranged in the second rear swing beam, and the second rear insert beam is connected with the second rear swing beam through a hydraulic device and can stretch and retract relative to the second rear swing beam;
s3, supporting a first back swing beam;
s6, supporting a second back swing beam;
s9, extending a first rear inserted beam;
s10, a first post-inserted beam is received;
s13 further comprises a second-extending rear inserted beam;
s14 still include, receive the back inserted beam of number two.
Further, the right side of the first top beam and the left side of the second top beam are respectively provided with a side guard plate, the side guard plates are respectively connected with the first top beam and the second top beam through hydraulic devices, and the side guard plates can respectively move laterally relative to the first top beam and the second top beam;
s7, extending a side guard plate;
s9, a side guard plate is collected;
s15 further comprises a side protection plate;
and S16, a side guard plate is collected.
Further, a first box girder and a second box girder are outwards arranged on the front side of the first top girder and the second top girder respectively, the first box girder and the second box girder are connected with a first front telescopic girder and a second front telescopic girder through a hydraulic device respectively, and the first front telescopic girder and the second front telescopic girder can be telescopic relative to the first box girder and the second box girder respectively;
s3, extending a first front telescopic beam;
s6, a second front telescopic beam is stretched;
s9, the front telescopic beam is folded;
s11 also comprises a first extending front telescopic beam;
s13, the second front telescopic beam is received;
s15 further comprises a second-extending front telescopic beam;
s16 further comprises a first front telescopic beam;
s18 still include, stretch a preceding telescopic beam.
Further, the number one hydraulic prop and the number two hydraulic prop are respectively provided with 4 hydraulic props.
The beneficial effects of the invention are as follows: a method for safely and quickly withdrawing a hydraulic support of a fully-mechanized coal mining face of a coal mine comprises the steps of carrying out withdrawal by using a special support auxiliary hydraulic support for safely and quickly withdrawing the fully-mechanized coal mining face of the coal mine, respectively replacing a first group of hydraulic supports and a third group of hydraulic supports counted from the withdrawal position by using a first support and a second support, forming support for a triangle area by the first support and the second support, connecting the first support and the second support through a hydraulic pushing device after withdrawing the second group of hydraulic supports, then withdrawing the hydraulic support on the right side of the second support, lowering the second top beam through the second hydraulic support, extending out of the hydraulic pushing device to enable the fixed first support to push the second support to replace the withdrawn position of the hydraulic support, lifting the second top beam through the second hydraulic support, playing the same support role of the original hydraulic support, then lifting the first top beam through the first hydraulic support, pulling the first support to a position through the fixed second hydraulic support, lifting the first top beam, playing the role of support, and freely falling down in the triangle area, thereby completing the hydraulic circulation of the first support until the right side of the second support is completely withdrawn; the whole process does not need a wood pile, a triangular area does not need workers to operate under an unsupported roof, the safety is good, the speed is high, the production efficiency of coal mine enterprises is greatly improved, the cost is saved, and the effect is remarkable in practical application;
the left side of the first top beam is provided with the plurality of side swing beams, the side swing beams form an included angle with the first top beam, and the arrangement of the side swing beams can prevent gangue from falling down to bury the base of the special retractable support, so that the pulling is difficult; through being equipped with the inserted beam in the side swing beam, when the side swing beam is pushed down by the waste rock, cause the bracket of the first size to be difficult to move, through the effect of the hydraulic means, make the inserted beam stretch out and raise the bottom of the bracket of the first size, reduce the friction of bracket of the first size and bottom plate, make the bracket of the first size can be pulled by bracket of the second size so as to move smoothly; the right side of the second top beam is provided with the plurality of telescopic beams, when the hydraulic support is withdrawn, the telescopic beams are timely extended out, a temporary supporting effect is achieved on the withdrawn area of the hydraulic support, and safety is improved; the rear side of the first top beam is provided with the first rear swing beam, the rear side of the second top beam is provided with the second rear swing beam, so that the falling gangue on the side surface of the withdrawal direction is protected, and the hydraulic support is prevented from being buried by the first base and the second base to be influenced; similarly, a first rear insert beam is arranged in the first rear swing beam, a second rear insert beam is arranged in the second rear swing beam, and after the falling gangue on the side face of the withdrawal direction presses the first rear insert beam and the second rear insert beam, the first base or the second base can be lifted through a hydraulic device so as to be smoothly withdrawn; the side guard plates are respectively arranged on the right side of the first top beam and the left side of the second top beam, and extend out when the hydraulic pushing device extends out, so that a temporary supporting effect is achieved on the area between the first bracket and the second bracket; the front side of the first top beam and the second top beam are outwards extended to be provided with a first box beam and a second box beam respectively, the first box beam and the second box beam are connected with a first front telescopic beam and a second front telescopic beam respectively through hydraulic devices, timely support of the front areas of the first top beam and the second top beam is met, the pressure of the support of the first top beam and the second top beam is high, and the support is a solid plate, so that the first box beam and the second box beam are arranged, and the hydraulic devices are arranged in the first box beam and the second box beam and are connected with the first front telescopic beam and the second front telescopic beam respectively; the first hydraulic prop and the second hydraulic prop are respectively provided with 4 hydraulic props, can play a role in supporting stably and with enough strength, and enable the first top beam and the second top beam to be stressed uniformly; under the cooperation of side swing beam, insert beam, flexible roof beam, swing beam behind No. one, swing beam behind No. two, insert the roof beam behind No. two, side guard plate, flexible roof beam before No. one, flexible roof beam before No. two, withdraw from hydraulic support's in-process, in time play temporary support effect.
In summary, according to the method for safely and quickly withdrawing the hydraulic support of the fully mechanized coal mining face, after the hydraulic support is withdrawn through the combination of the first support and the second support, the hydraulic support is withdrawn sequentially according to the steps through the extension and shortening of the hydraulic pushing device, so that a withdrawal cycle is formed; the side swing beam, the first rear swing beam and the second rear swing beam are used for protecting the first support and the second support, preventing gangue from falling, burying the first base and the second base, lifting the first base and the second base through the matching of the insertion beam, the first rear insertion beam and the second rear insertion beam, reducing friction force, facilitating withdrawal, and performing temporary support on the area between the first support and the second support through the side guard plate, performing temporary support on the area withdrawn by the hydraulic support through the telescopic beams, and performing support on the front side area through the first box beam, the second box beam, the first front telescopic beam and the second front telescopic beam; in the use process, the invention does not need to erect a wood pile, a triangular area does not need workers to operate under an unsupported roof, the safety performance is good, the retraction speed is high, the production efficiency of coal mine enterprises is greatly improved, the cost is saved, the invention is suitable for retracting a single-channel hydraulic support and a multi-channel hydraulic support, the retraction speed is more than 3 times of the method for erecting the wood pile, and the invention is suitable for popularization and use.
Drawings
FIG. 1 is an isometric view of a special bracket for safely and quickly retracting a fully mechanized coal mining face;
FIG. 2 is a top view of a special support for safe and quick retraction of a fully mechanized coal mining face;
FIG. 3 is a schematic illustration of rack retraction performed in a timber stack;
FIG. 4 is a schematic illustration of the use of a coal mine fully mechanized coal face safe and rapid retraction of a dedicated bracket for bracket retraction;
fig. 5 is a schematic drawing of the retraction of the hydraulic support of the multi-channel fully mechanized mining face.
In the figure: the hydraulic support comprises a first support, a second support, a first base, a first 4 support, a second 5 support, a second 6 support, a second 7 support, a second 8 support, a second 9 support, a second 10 support, a fourth 11 support, a second 12 support, a second 13 support, a second 14 support, a fourth 15 support, a fourth 16 support, a fourth 17 support, a fourth 18 support, a fourth 19 support, a fourth 20 support, a fourth 21 support, a fourth 22 support, a fourth 23 support, a fourth 24 support, a fourth 25 support, a fourth 26 support, a fourth 27 support, a fourth 28 support for safe and rapid retraction of the fully mechanized coal face, a fourth 29 support area, and a fourth 30 retraction channel.
Detailed Description
In order that the manner in which the above-recited features and advantages of the present invention are obtained, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, in which, as a result, all embodiments of the invention are illustrated in the appended drawings.
In the description of the present invention, it should be noted that, with respect to terms such as "front", "rear", "left", "right", etc., used in relation to the present invention, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the indicated apparatus or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
as shown in fig. 1 and 2, a method for safely and quickly retracting a hydraulic support of a fully-mechanized coal mining face is characterized in that a special support 28 for safely and quickly retracting the fully-mechanized coal mining face is used for assisting in retracting the hydraulic support, the special support 28 for safely and quickly retracting the fully-mechanized coal mining face comprises a first support 1 and a second support 2, the first support 1 comprises a first base 3, first hydraulic supports 5 and a first top beam 4, the bottom of the first hydraulic supports 5 is connected with the first base 3, the top of the first hydraulic supports 5 is connected with the first top beam 4, the first hydraulic supports 5 are provided with 4 supports, and the first hydraulic supports are symmetrically arranged on the first base 3; the second bracket 2 comprises a second base 6, second hydraulic support posts 7 and second top beams 8, wherein the bottom of the second hydraulic support posts 7 is connected with the second base 6, the top of the second hydraulic support posts 7 is connected with the second top beams 8, 4 second hydraulic support posts 7 are symmetrically arranged on the second base 6; the right side of the first base 3 and the left side of the second base 6 are connected by adopting a hydraulic pushing device 21;
the left side of the first top beam 4 is provided with a plurality of side swing beams 9, the plurality of side swing beams 9 are coplanar, the plane where the side swing beams 9 are positioned extends downwards along the first top beam 4 and forms an included angle with the plane where the first top beam 4 is positioned, and the included angle is 120-150 degrees; an inserting beam 10 is arranged in the side swinging beam 9, and the inserting beam 10 is connected with the side swinging beam 9 through a hydraulic device and can stretch and retract relative to the side swinging beam 9; the right side of the second top beam 8 is provided with a plurality of telescopic beams 11, the telescopic beams 11 are connected with the second top beam 8 through a hydraulic device, and the telescopic beams 11 can be telescopic relative to the second top beam 8; the rear side of the first top beam 4 is provided with a first back swing beam 12, the plane of the first back swing beam 12 extends downwards along the first top beam 4 and forms an included angle with the plane of the first top beam 4, the included angle is 120-150 degrees, correspondingly, the rear side of the second top beam 8 is provided with a second back swing beam 13, the plane of the second back swing beam 13 extends downwards along the second top beam 8 and forms an included angle with the plane of the second top beam 8, and the included angle is 120-150 degrees; the first back swing beam 12 is internally provided with a first back insert beam 14, the first back insert beam 14 is connected with the first back swing beam 12 through a hydraulic device, and can stretch and retract relative to the first back swing beam 12, correspondingly, the second back swing beam 13 is internally provided with a second back insert beam 15, and the second back insert beam 15 is connected with the second back swing beam 13 through the hydraulic device, and can stretch and retract relative to the second back swing beam 13; the right side of the first top beam 4 and the left side of the second top beam 8 are respectively provided with a side guard plate 16, the side guard plates 16 are respectively connected with the first top beam 4 and the second top beam 8 through hydraulic devices, and the side guard plates 16 can respectively move laterally relative to the first top beam 4 and the second top beam 8; the front side of the first top beam 4 and the second top beam 8 are outwards provided with a first box beam 17 and a second box beam 18 respectively, the first box beam 17 and the second box beam 18 are connected with a first front telescopic beam 19 and a second front telescopic beam 20 respectively through hydraulic devices, and the first front telescopic beam 19 and the second front telescopic beam 20 can be telescopic relative to the first box beam 17 and the second box beam 18 respectively;
as shown in fig. 3, in order to erect a wood pile for carrying out a working mode of support withdrawing, the end point of coal mining is a working face stoping line position 23, a fully mechanized working face is a caving region 25, a hydraulic support 27 is used for supporting a fully mechanized working face, a return air gate 22 is used for ventilation and transportation, the hydraulic support 27 is withdrawn along with the pushing of the fully mechanized working face, the withdrawing region is a triangular region 24, the triangular region 24 is required to be supported in order to ensure the smooth withdrawing of the hydraulic support 27 in the withdrawing process, the hydraulic support 27 is prevented from being buried by falling gangue, the hydraulic support 27 is difficult to withdraw, the current supporting mode is that the wood pile 26 is erected by manually entering the triangular region 24, the falling gangue of the wood pile 26 is buried after the hydraulic support 27 is withdrawn, the waste of raw materials is serious, and the cost is high; the method also requires workers to operate under the condition of not supporting the top plate, and has low safety, long time and low efficiency, and the wood stacks are erected manually;
as shown in fig. 4, the method for safely and quickly retracting the hydraulic support of the fully mechanized coal mining face comprises the following steps:
s1: withdrawing the first set of hydraulic brackets 27;
s2: moving bracket 1 into the position where the first group of hydraulic brackets 27 is withdrawn;
s3: lifting the first hydraulic prop 5 to reach an initial supporting state, supporting the side swing beam 9, supporting the first rear swing beam 12 and extending the first front telescopic beam 19;
s4: withdrawing the third set of hydraulic brackets 27;
s5: moving the second bracket 2 into a position where the third group of hydraulic brackets 27 is withdrawn;
s6: lifting the second hydraulic prop 7 to reach a primary supporting state, supporting the second rear swing beam 13 and extending the second front telescopic beam 20;
s7: withdrawing the second set of hydraulic supports 27 and extending the skirt 16;
s8: two ends of the hydraulic pushing device 21 are respectively arranged on the right side of the first base 3 and the left side of the second base 6;
s9: lowering the first hydraulic prop 5 to enable the first top beam 4 to leave the top plate, extend the inserting beam 10, extend the first rear inserting beam 14, retract the side guard plate 16 and retract the first front telescopic beam 19;
s10: the hydraulic pushing device 21 is retracted, so that the first bracket 1 moves rightwards by the supporting width of a group of hydraulic brackets, the beam 10 is retracted, and the beam 14 is retracted;
s11: lifting the first hydraulic prop 5 to reach a preliminary supporting state, and extending the first front telescopic beam 19;
s12: the hydraulic support 27 on the right side of the second support 2 is withdrawn, and the telescopic beam 11 is extended;
s13: lowering the hydraulic prop 7 to enable the top beam 8 to leave the top plate, contracting the telescopic beam 11, extending the rear inserting beam 15 and contracting the front telescopic beam 20;
s14: pushing the hydraulic pushing device 21 to enable the second bracket 2 to move rightwards by the supporting width of a group of hydraulic brackets, and collecting the second rear inserted beam 15;
s15: lifting the second hydraulic prop 7 to reach a preliminary supporting state, extending the side guard plate 16 and extending the second front telescopic beam 20;
s16: lowering the first hydraulic prop 5 to enable the first top beam 4 to leave the top plate, collecting the side guard plates 16 and collecting the first front telescopic beams 19;
s17: the hydraulic pushing device 21 is retracted, so that the first bracket 1 moves rightwards by the supporting width of a group of hydraulic brackets;
s18: lifting the first hydraulic prop 5 to reach a preliminary supporting state, and extending the first front telescopic beam 19;
and S19, repeating the steps S12-S18 until the hydraulic support on the right side of the second support is completely withdrawn, and disassembling the hydraulic pushing device to sequentially withdraw the second support and the first support.
In the use process of the invention, the triangular area 24 does not need the entrance of staff, the safety is high, the wooden buttress 26 is not required to be erected, the special bracket 28 is retracted safely and rapidly along with the fully mechanized mining face of the coal mine, the top plate freely collapses and releases stress, the safety of the whole withdrawal process is good, the speed is high, the production efficiency of the coal mine enterprise is greatly improved, the cost is saved, and the effect is remarkable.
Example 2
The method for safely and quickly retracting the hydraulic support of the fully-mechanized coal mining face comprises the steps that the special support 28 for safely and quickly retracting the fully-mechanized coal mining face is used for assisting in retracting the hydraulic support, the special support 28 for safely and quickly retracting the fully-mechanized coal mining face comprises a first support 1 and a second support 2, the first support 1 comprises a first base 3, a first hydraulic prop 5 and a first top beam 4, the bottom of the first hydraulic prop 5 is connected with the first base 3, the top of the first hydraulic prop 5 is connected with the first top beam 4, the first hydraulic prop 5 is provided with 4 hydraulic props, and the first hydraulic props are symmetrically arranged on the first base 3; the second bracket 2 comprises a second base 6, second hydraulic support posts 7 and second top beams 8, wherein the bottom of the second hydraulic support posts 7 is connected with the second base 6, the top of the second hydraulic support posts 7 is connected with the second top beams 8, 4 second hydraulic support posts 7 are symmetrically arranged on the second base 6; the right side of the first base 3 and the left side of the second base 6 are connected by adopting a hydraulic pushing device 21;
the method for safely and rapidly withdrawing the hydraulic support of the fully mechanized coal mining face comprises the following steps:
s1: withdrawing the first set of hydraulic brackets 27;
s2: moving bracket 1 into the position where the first group of hydraulic brackets 27 is withdrawn;
s3: lifting the first hydraulic prop 5 to reach a preliminary supporting state;
s4: withdrawing the third set of hydraulic brackets 27;
s5: moving the second bracket 2 into a position where the third group of hydraulic brackets 27 is withdrawn;
s6: lifting the second hydraulic prop 7 to reach a preliminary supporting state;
s7: withdrawing the second set of hydraulic brackets 27;
s8: two ends of the hydraulic pushing device 21 are respectively arranged on the right side of the first base 3 and the left side of the second base 6;
s9: lowering the first hydraulic prop 5 to leave the first top beam 4 from the top plate;
s10: the hydraulic pushing device 21 is retracted, so that the first bracket 1 moves rightwards by the supporting width of a group of hydraulic brackets;
s11: lifting the first hydraulic prop 5 to reach a preliminary supporting state;
s12: withdrawing the hydraulic support 27 on the right side of the second support 2;
s13: lowering the hydraulic prop 7 to leave the top beam 8 from the top plate;
s14: pushing the hydraulic pushing device 21 to enable the second bracket 2 to move rightwards by the supporting width of a group of hydraulic brackets;
s15: lifting the second hydraulic prop 7 to reach a preliminary supporting state;
s16: lowering the first hydraulic prop 5 to leave the first top beam 4 from the top plate;
s17: the hydraulic pushing device 21 is retracted, so that the first bracket 1 moves rightwards by the supporting width of a group of hydraulic brackets;
s18: lifting the first hydraulic prop 5 to reach a preliminary supporting state;
and S19, repeating the steps S12-S18 until the hydraulic support on the right side of the second support is completely withdrawn, and disassembling the hydraulic pushing device to sequentially withdraw the second support and the first support.
Example 3
The difference between this embodiment and embodiment 1 is that embodiment 1 is a single-channel hydraulic support retraction, and this embodiment is a multi-channel hydraulic support retraction, as shown in fig. 5:
by dividing the long fully mechanized mining face to form a plurality of channels, the positions of the channels correspond to the withdrawal starting positions of the hydraulic supports 27, and reinforcing and supporting the withdrawal starting positions to form a reinforcing and supporting area 29, the withdrawal of the hydraulic supports 27 is performed simultaneously according to the steps in embodiment 1, and the withdrawn hydraulic supports enter the return air chute 22 or other suitable channels through the withdrawal channels 30 to complete the withdrawal.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modifications or equivalent substitutions made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (2)
1. The method for safely and quickly retracting the hydraulic support of the fully mechanized coal mining face is characterized in that a special support for safely and quickly retracting the fully mechanized coal mining face is used for assisting in retracting the hydraulic support;
the special support for safely and quickly retracting the fully mechanized coal mining face comprises a first support and a second support, wherein the first support comprises a first base, a first hydraulic prop and a first top beam, the bottom of the first hydraulic prop is connected with the first base, the top of the first hydraulic prop is connected with the first top beam, a plurality of first hydraulic props are symmetrically arranged on the first base; the second support comprises a second base, second hydraulic support columns and second top beams, the bottoms of the second hydraulic support columns are connected with the second base, the tops of the second hydraulic support columns are connected with the second top beams, and the second hydraulic support columns are symmetrically arranged on the second base; the right side of the first base is connected with the left side of the second base by a hydraulic pushing device;
the left side of the first top beam is provided with a plurality of side swing beams, the plurality of side swing beams are coplanar, the plane where the side swing beams are located extends downwards along the first top beam and forms an included angle with the plane where the first top beam is located, the included angle is 120-150 degrees, an inserting beam is arranged in the side swing beam, and the inserting beam is connected with the side swing beam through a hydraulic device and can stretch and retract relative to the side swing beam;
the right side of the second top beam is provided with a plurality of telescopic beams, the telescopic beams are connected with the second top beam through a hydraulic device, and the telescopic beams can be telescopic relative to the second top beam;
the rear side of the first top beam is provided with a first back swing beam, the plane of the first back swing beam extends downwards along the first top beam and forms an included angle with the plane of the first top beam, and the included angle is 120-150 degrees; correspondingly, a second back swing beam is arranged on the rear side of the second top beam, the plane of the second back swing beam extends downwards along the second top beam and forms an included angle with the plane of the second top beam, and the included angle is 120-150 degrees; the first rear swing beam is internally provided with a first rear insert beam, and is connected with the first rear swing beam through a hydraulic device and can stretch and retract relative to the first rear swing beam; correspondingly, a second rear insert beam is arranged in the second rear swing beam, and the second rear insert beam is connected with the second rear swing beam through a hydraulic device and can stretch and retract relative to the second rear swing beam;
the right side of the first top beam and the left side of the second top beam are respectively provided with a side guard plate, the side guard plates are respectively connected with the first top beam and the second top beam through hydraulic devices, and the side guard plates can respectively move laterally relative to the first top beam and the second top beam;
the front lateral extensions of the first top beam and the second top beam are respectively provided with a first box beam and a second box beam, the first box beam and the second box beam are respectively connected with a first front telescopic beam and a second front telescopic beam through a hydraulic device, and the first front telescopic beam and the second front telescopic beam can be respectively telescopic relative to the first box beam and the second box beam;
the method for safely and rapidly withdrawing the hydraulic support of the fully mechanized coal mining face comprises the following steps:
s1: withdrawing the first set of hydraulic mounts;
s2: moving the first bracket into a position where the first group of hydraulic brackets are withdrawn;
s3: lifting the first hydraulic prop to reach an initial supporting state, supporting the side swing beam, supporting the first rear swing beam and extending the first front telescopic beam;
s4: withdrawing the third group of hydraulic supports;
s5: moving the second bracket into a position where the third group of hydraulic brackets are withdrawn;
s6: lifting the second hydraulic prop to reach a primary supporting state, supporting the second rear swing beam and extending the second front telescopic beam;
s7: withdrawing the second group of hydraulic supports and extending the side guard plates;
s8: two ends of the hydraulic pushing device are respectively arranged on the right side of the first base and the left side of the second base;
s9: lowering the first hydraulic prop to enable the first top beam to leave the top plate, collecting the side guard plates, collecting the first front telescopic beam, extending the inserting beam and extending the first rear inserting beam;
s10: the hydraulic pushing device is retracted, so that the first bracket moves rightwards by the supporting width of the group of hydraulic brackets, the first post-beam is retracted, and the beam is retracted;
s11: lifting the first hydraulic prop, extending the first front telescopic beam to reach a preliminary supporting state;
s12: withdrawing the hydraulic support at the right side of the second support and extending out of the telescopic beam;
s13: lowering the hydraulic prop, enabling the top beam II to leave the top plate, contracting the telescopic beam, contracting the front telescopic beam II, and extending the rear inserted beam II;
s14: pushing the hydraulic pushing device to enable the second bracket to move rightwards by the supporting width of the group of hydraulic brackets, and collecting the second rear inserted beam;
s15: lifting the second hydraulic prop, extending the side guard plate and extending the second front telescopic beam to reach a primary supporting state;
s16: lowering the first hydraulic prop to enable the first top beam to leave the top plate, collecting the side guard plates and collecting the first front telescopic beam;
s17: the hydraulic pushing device is retracted, so that the first bracket moves rightwards by the supporting width of a group of hydraulic brackets;
s18: lifting the first hydraulic prop, extending the first front telescopic beam to reach a preliminary supporting state;
s19: and S12-S18 are repeated until the hydraulic support on the right side of the second support is completely withdrawn, the hydraulic pushing device is disassembled, and the second support and the first support are withdrawn in sequence.
2. The method for safely and quickly retracting the hydraulic support of the fully mechanized coal mining face according to claim 1, wherein 4 hydraulic supports are respectively arranged on the first hydraulic support and the second hydraulic support.
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| CN202110095715.XA CN112879063B (en) | 2021-01-25 | 2021-01-25 | Method for safely and rapidly retracting hydraulic support of fully-mechanized coal mining face |
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| CN202110095715.XA CN112879063B (en) | 2021-01-25 | 2021-01-25 | Method for safely and rapidly retracting hydraulic support of fully-mechanized coal mining face |
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| CN113653523B (en) * | 2021-09-22 | 2023-09-12 | 中国煤炭科工集团太原研究院有限公司 | Triangular-area wide temporary support device and support method for quickly withdrawing hydraulic support |
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| CN101463730A (en) * | 2008-12-31 | 2009-06-24 | 山东唐口煤业有限公司 | Self-moving device of protection stand |
| CN102011603B (en) * | 2010-10-30 | 2012-08-22 | 煤炭科学研究总院太原研究院 | Coal mine underground remote control triangle protective shield |
| CN104895592A (en) * | 2015-05-26 | 2015-09-09 | 神华集团有限责任公司 | Fully-mechanized coal mining and caving face support retracement supporting method |
| CN207245739U (en) * | 2017-07-17 | 2018-04-17 | 南京石诚井巷装备有限责任公司 | Hydraulic support withdrawing suspension device and fully mechanized mining support apparatus |
| CN107152298B (en) * | 2017-07-17 | 2023-08-15 | 南京石诚井巷装备有限责任公司 | Support device for retracting hydraulic support and fully-mechanized mining support equipment |
| CN111622787A (en) * | 2020-07-03 | 2020-09-04 | 兖矿集团有限公司 | Method for withdrawing fully-mechanized mining hydraulic support by using hauler |
| CN111852524A (en) * | 2020-08-29 | 2020-10-30 | 北京诚田恒业煤矿设备有限公司 | Hydraulic support group special for withdrawing coal mine fully-mechanized coal mining face hydraulic support and withdrawing method thereof |
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