CN110080811B - Adjustable type advanced support bracket for rapid comprehensive mechanized excavation and use method - Google Patents
Adjustable type advanced support bracket for rapid comprehensive mechanized excavation and use method Download PDFInfo
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- CN110080811B CN110080811B CN201910508557.9A CN201910508557A CN110080811B CN 110080811 B CN110080811 B CN 110080811B CN 201910508557 A CN201910508557 A CN 201910508557A CN 110080811 B CN110080811 B CN 110080811B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000009412 basement excavation Methods 0.000 title claims abstract description 12
- 230000005641 tunneling Effects 0.000 claims abstract description 52
- 238000004873 anchoring Methods 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 12
- 239000003245 coal Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 230000006855 networking Effects 0.000 claims description 8
- 239000011435 rock Substances 0.000 claims description 6
- 230000003028 elevating effect Effects 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000002194 synthesizing effect Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
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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
- E21D23/03—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support
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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
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
- E21D23/0409—Aligning or guiding means for the supports or for the constitutive parts of the supports
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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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Abstract
The invention discloses an adjustable advance support bracket for rapid comprehensive mechanical tunneling and a using method thereof, wherein the advance support bracket comprises a main bracket, an auxiliary bracket and a working platform, the auxiliary bracket is arranged at the rear end of the main bracket and is connected with the main bracket through a pushing hydraulic cylinder, and the working platform can be arranged at the inner side of the main bracket in a lifting way and is positioned below the main bracket; the top guard plate comprises a plurality of left guard plates and right guard plates which are arranged in a hollow mode, adjusting beams are correspondingly inserted into the left guard plates and the right guard plates, and adjusting beam hydraulic cylinders are arranged in the left guard plates and the right guard plates in a matched mode, so that the distance between the left guard plates and the right guard plates can be adjusted; the front canopy is in a bilaterally symmetrical split structure, and the left-right distance between the front canopy and the front canopy is adjusted through the front canopy adjusting beam in the middle. The adjustable advance support bracket for rapid comprehensive mechanized excavation and the use method can adjust the width of the top guard plate according to the width of a roadway to be excavated, and improve the adaptability of the advance support bracket for preventing excavation of the roadway with different widths.
Description
Technical Field
The invention belongs to the technical field of temporary support of underground fully mechanized coal mining surfaces of coal mines, and particularly relates to an adjustable advance support bracket for rapid comprehensive mechanized excavation and a using method thereof.
Background
In the tunneling construction of a working face roadway under a coal mine, a cantilever type tunneling machine and a single anchor rod drilling machine are generally adopted to be matched with each other, the operation process of 'one tunneling and one anchoring' must be strictly executed in the construction, the offset distance needs to be shortened, the comprehensive tunneling machine is frequently driven in and out, the driving rate is low, workers need to carry the single anchor rod drilling machine back and forth, and the net laying mainly depends on the workers to step on the escalator to support the anchor net for laying, so that the method not only occupies more personnel, has long auxiliary operation time, low tunneling efficiency and single water inlet level difference, but also has high labor intensity and poor operation safety.
In the operation process of one digging and one anchoring, two support modes of a hanging ring (U-shaped clamp) string beam and a support and a cross beam are commonly used, and the two support modes have potential safety hazards of high operation difficulty, low support strength, poor safety and reliability, anchoring operation in an empty roof area and the like. Part coal mines adopt the onboard temporary support device of the cantilever type heading machine to replace two support forms of a hanging ring (U-shaped clamp) string beam and a support and a cross beam, but the onboard temporary support device has the defects of small supporting force and roof protection area, shielding of sight of an operation driver of the heading machine and the like, is small in applicable roadway height range and cannot be used under the condition of roof breakage, and the improvement of heading efficiency is restricted when the onboard temporary support device is used for supporting working procedures.
The Chinese invention patent 'a self-moving advanced temporary support hydraulic support for fully mechanized excavation' (patent number: CN201510138169.8) discloses a self-moving advanced temporary support hydraulic support for fully mechanized excavation, which comprises an advanced support and a transition support; the forepoling support is provided with two sections of telescopic beams and a cantilever beam, so that forepoling can be realized; the transition support is connected behind the forepoling support and can be lifted and lowered to push the forepoling support to move forwards, so that the self-movement of the support group is realized; the hydraulic support has high automation and mechanization degrees, can realize self-moving self-adjustment, and circularly carries out fully-mechanized excavation advance support; the operation of the support group is controlled by a hydraulic system, and automation and mechanization of the support group are realized through system setting, so that the safety, reliability and tunneling speed during tunneling are improved.
The invention discloses a rapid tunneling fore support (patent number: CN201410475830.X), which solves the safety problem of the prior fore support of a tunneling working face and comprises an inner side support group and an outer side support group, wherein the inner side support group and the outer side support group respectively comprise a left support and a right support, the left support and the right support of the inner side support group are arranged at the inner sides of the left support and the right support of the outer side support group, cross beams and longitudinal beams of the inner side support group and the outer side support group are alternately arranged, cantilever beams are arranged at the front ends of the longitudinal beams of the inner side support group, push-pull oil cylinders are respectively arranged on a left base and a right base of the inner support group and the outer support group and on the cross beams, a height difference is formed between the top of the cross beams and the bottom of the longitudinal beams of the support. The invention can realize full-section active supporting of the roof easily and timely, and is beneficial to the safety management of the roof of the mine.
Although the two support structures can realize the self-movement of the support and circularly carry out the comprehensive tunneling advance support, the equipment still needs to be stepped on the escalator by workers during the net laying process, and the hand-supported anchor net is laid, so that the occupied personnel are large, the auxiliary operation time is long, the operation safety of the operators is poor, and the tunneling efficiency is low.
Disclosure of Invention
The invention aims to provide an adjustable advance support bracket for rapid comprehensive mechanized tunneling and a using method thereof aiming at the defects of the prior art, and the advance support bracket is used for carrying out advance support on a top plate newly exposed in the tunneling process of a tunneling machine; and by utilizing the working platform, operators can carry out lapping, networking and anchoring operation, so that the safety of the operation is improved, and the working efficiency of the anchoring operation is improved.
In order to solve the technical problems, the invention adopts the technical scheme that:
an adjustable advance support bracket for rapid comprehensive mechanical tunneling comprises a main bracket, an auxiliary bracket and a working platform, wherein the main bracket and the auxiliary bracket are of split structures which are bilaterally symmetrical, the auxiliary bracket is arranged at the rear end of the main bracket and is connected with the main bracket through a pushing hydraulic cylinder, and the working platform can be arranged at the inner side of the main bracket in a lifting way and is positioned below the main bracket;
the main support and the auxiliary support respectively comprise a top guard plate, a lifting upright post and a base, and a four-bar linkage structure is arranged between the top guard plate and the base;
the top guard plate comprises a plurality of left guard plates and right guard plates which are arranged in a hollow mode, adjusting beams are correspondingly inserted into the left guard plates and the right guard plates, and adjusting beam hydraulic cylinders are arranged in the left guard plates and the right guard plates in a matched mode, so that the distance between the left guard plates and the right guard plates can be adjusted;
the front end part of the top guard plate of the main support is also provided with a front canopy which can stretch along the tunneling direction, the front canopy is in a bilaterally symmetrical split structure, and the left and right distance between the front canopy and the front canopy is adjusted through a front canopy adjusting beam in the middle;
the working platform comprises a platform body, a vertical strut and a horizontal hydraulic cylinder, wherein the platform body is a multi-stage supporting platform arranged along the tunneling direction and stretches along the tunneling direction under the action of the horizontal hydraulic cylinder; the scalable preceding tip of locating the platform body of vertical pillar supports between platform body and tunnel bottom plate, and is equipped with hydraulic cylinder between platform body and base, drives the platform body along vertical lift.
The front end part of the working platform is also provided with a hydraulic supporting device for supporting the upper front canopy, and the hydraulic supporting device is arranged in a vertically telescopic manner.
The hydraulic support device comprises an upper support rod, an upper hydraulic rod vertically arranged and a side hydraulic rod hinged with the upper hydraulic rod, and the other end of the side hydraulic rod is hinged with the platform body; the upper supporting rod is fixedly arranged at the top of the upper hydraulic rod and is driven by the upper hydraulic rod and the side hydraulic rod to perform telescopic and swinging motion.
The multi-stage supporting platform comprises a front-to-back secondary supporting platform and a primary supporting platform, and the horizontal hydraulic cylinder comprises a first horizontal hydraulic cylinder and a second horizontal hydraulic cylinder;
the tail end part of the first horizontal hydraulic cylinder is fixedly arranged at the rear end part of the platform body, and the head end part of the first horizontal hydraulic cylinder is connected with the primary supporting platform;
the tail end of the second horizontal hydraulic cylinder is fixedly arranged at the rear end of the primary supporting platform, and the head end of the second horizontal hydraulic cylinder is connected with the secondary supporting platform.
The platform body below still is equipped with vertical adjustable elevating platform, and the top portion of elevating platform is connected with the downside of platform body, and the bottom portion and the base of elevating platform are connected.
The elevating platform is established to cut fork arm pole group, and equal corresponding articulated base and the slip table of being equipped with on the downside of base and work platform, cuts one side of fork arm pole group and articulated base are articulated, the spacing sliding connection of opposite side and slip table.
The four-bar linkage adopts a crane type linkage.
And the front end part of the top guard plate of the main support is also provided with a top hydraulic cylinder in control connection with the forepoling bar to drive the forepoling bar to stretch along the tunneling direction.
The use method of the adjustable type advance support bracket for rapid comprehensive mechanical tunneling is characterized by comprising the following steps:
1) the width of a top guard plate and a front canopy of the advance support bracket is adjusted according to the width of a roadway to be tunneled, a main support continuously extends out of the front canopy along with the cutting of a cutting head of the tunneling machine on the coal rock wall of the roadway, timely support of a top plate exposed in the cutting process of the tunneling machine is realized, and when the front canopy is completely extended out, the tunneling machine stops cutting;
2) retracting a lifting hydraulic cylinder of the working platform to enable the platform body to be lowered to a proper height, extending a primary supporting platform of the multi-stage supporting platform by utilizing a first horizontal hydraulic cylinder, and supporting the primary supporting platform on a roadway bottom plate through a vertical strut; then, extending out a secondary supporting platform of the multistage supporting platform by using a second horizontal hydraulic cylinder, erecting an upper supporting rod by using a hydraulic supporting device, and supporting the front end of the front cantilever by the upper supporting rod through an upper hydraulic rod;
3) the working personnel complete the operations of lapping, networking and anchoring on the working platform, and realize the permanent support of the exposed top plate in the tunneling process;
4) the upper supporting rod is recovered through retraction of the side hydraulic rod and the upper hydraulic rod, the secondary supporting platform is retracted through the second horizontal hydraulic cylinder, the vertical supporting column is retracted, and the primary supporting platform is retracted through the first horizontal hydraulic cylinder; meanwhile, a lifting hydraulic cylinder of the working platform extends outwards to enable the platform body to rise to a position which is about 200mm away from a top guard plate of the main support, a lifting upright post of the main support retracts to enable the top guard plate of the main support to slightly descend and to be separated from a roadway roof, and then the pushing hydraulic cylinder between the main support and the auxiliary support extends outwards and drives the main support to move forwards by taking the auxiliary support as a fulcrum;
5) the lifting upright posts of the main support extend outwards, so that the top guard plate of the main support is re-supported on the roadway roof which is just permanently supported; meanwhile, the lifting upright post of the auxiliary support retracts to enable the top guard plate of the auxiliary support to be separated from the top plate of the roadway, and the auxiliary support moves forwards by retracting through a pushing hydraulic cylinder between the main support and the auxiliary support and taking the main support as a fulcrum; after the auxiliary support is moved forwards, the lifting upright posts of the auxiliary support extend outwards, so that the top protective plate of the auxiliary support supports the roadway roof again;
and finishing one working cycle, restarting the tunneling machine to cut the coal rock wall of the roadway, and starting the next working cycle.
The invention has the beneficial effects that:
(1) the adjustable advance support bracket for rapid comprehensive mechanical tunneling and the use method thereof have the advantages that the main bracket and the auxiliary bracket are of split structures which are bilaterally symmetrical, the front end part of the top guard plate of the main bracket is also provided with a front canopy which can stretch along the tunneling direction, and the top plate exposed in the tunneling process is supported in time by the stretching of the front canopy along the tunneling direction; meanwhile, the front canopy adjusts the left-right distance between the front canopy and the front canopy through the front canopy adjusting beam in the middle part, and in actual use, the width of the top guard plate can be adjusted according to the width of a roadway to be tunneled, so that the adaptability of the front canopy to tunneling roadways with different widths is improved; meanwhile, the exposed tunnel roof can be timely supported when the heading machine cuts, meanwhile, the heading machine can be propelled for multiple times in one working cycle, the heading distance is obviously increased, the phenomena that the heading machine has to dig one anchor, the heading distance is short and the heading machine frequently withdraws in the original heading operation are avoided, and the heading efficiency of the tunnel is improved.
(2) The working unit is provided with the working platform, operators can conveniently stand on the working platform to carry out lapping, networking and anchoring operation, the problem that in the original tunneling operation, workers frequently move the escalator and need specially-assigned persons to support the escalator is avoided, the number of the operators is reduced, the labor intensity of the workers is reduced, the working efficiency is improved, and the safety of the workers is guaranteed.
(3) The working platform is provided with the scissor arm rod group, and the working platform has good stability when being lifted; in addition, the working platform is provided with a multi-stage supporting platform, the structure is compact, the working range is large, and the working efficiency of the lapping, networking and anchoring operation is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a partial schematic view of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
The invention provides an adjustable type advance support bracket for rapid comprehensive mechanized tunneling, which is shown in figures 1 and 2. The utility model provides a quick advance support who synthesizes mechanized tunnelling fast, includes main support 1, assistant support 2 and work platform 3, and main support 1 and assistant support 2 are bilateral symmetry's components of a whole that can function independently structure, and assistant support 2 locates the rear end of main support 1 and is connected with main support 1 through pushing pneumatic cylinder 4, and work platform 3 liftable locate the inboard of main support 1 and lie in the below of main support 1.
The main support 1 and the auxiliary support 2 both comprise a top guard plate 5, a lifting upright post 6 and a base 7, and a four-bar structure 8 is arranged between the top guard plate 5 and the base 7; in this embodiment, the four-bar linkage 8 is a crane-type linkage; the top guard plate 5 comprises a plurality of hollow left guard plates 51 and right guard plates 52, adjusting beams 53 are inserted into the left guard plates 51 and the right guard plates 52, the distance between the left guard plates 51 and the right guard plates 52 is adjustable, adjusting beam hydraulic cylinders are arranged below the adjusting beams 53 and used for adjusting the lengths of the adjusting beams 53 inserted into the left side guard plates and the right side guard plates, the distance is adjusted, and in actual use, the width of the top guard plates can be adjusted according to the width of a roadway to be tunneled.
The front end part of a top guard plate of the main support 1 is also provided with a front canopy 11 which can stretch along the tunneling direction, the front canopy 11 is in a split structure which is symmetrical left and right, and the left and right distance between the front canopy 11 and the front canopy is adjusted through a front canopy adjusting beam 12 in the middle; meanwhile, the front end part of the main support 1 is also provided with a top hydraulic cylinder 13 which is in control connection with the front canopy 11 and drives the front canopy to stretch along the tunneling direction.
The working platform 3 comprises a platform body 31, a vertical pillar 32 and a horizontal hydraulic cylinder, the platform body 31 is a multi-stage supporting platform arranged along the tunneling direction, and the multi-stage supporting platform extends and retracts along the tunneling direction under the action of the horizontal hydraulic cylinder.
The horizontal hydraulic cylinders comprise a first horizontal hydraulic cylinder 33 and a second horizontal hydraulic cylinder, the tail end part of the first horizontal hydraulic cylinder 33 is fixedly arranged at the rear end part of the platform body, and the head end part of the first horizontal hydraulic cylinder 33 is connected with the primary supporting platform; in this embodiment, the second horizontal hydraulic cylinder is located below the secondary support platform, and the tail end of the second horizontal hydraulic cylinder is fixedly arranged at the rear end of the primary support platform, and the head end of the second horizontal hydraulic cylinder is connected with the secondary support platform, and the corresponding horizontal hydraulic cylinder drives the corresponding support platform to realize the expansion and contraction along the tunneling direction.
The vertical pillar 32 is telescopically arranged at the front end part of the platform body 31 and supported between the platform body 31 and a roadway bottom plate, and a lifting hydraulic cylinder 311 is arranged between the platform body 31 and the base 7 to drive the platform body 31 to lift vertically.
The front end part of the working platform 3 is also provided with a hydraulic supporting device for supporting the upper front canopy 11, and the hydraulic supporting device is arranged in a vertically telescopic manner; in this embodiment, the hydraulic support device includes an upper support rod 111, an upper hydraulic rod 112 vertically disposed, and a side hydraulic rod 113 hinged to the upper hydraulic rod 112, and the other end of the side hydraulic rod 113 is hinged to the platform body 31; the upper support rod 111 is fixedly arranged on the top of the upper hydraulic rod 112 and is driven by the upper hydraulic rod 112 and the side hydraulic rod 113 to perform telescopic and swinging motions.
A vertically adjustable lifting platform 312 is further arranged below the platform body 31, the top end of the lifting platform 312 is connected with the lower side surface of the platform body 31, and the bottom end of the lifting platform 312 is connected with the base 7; preferably, the lifting table 312 is a scissor arm rod group, the lower side surfaces of the base 7 and the working platform 3 are respectively and correspondingly provided with a hinged base and a sliding table 313, one side of the scissor arm rod group is hinged with the hinged base, and the other side of the scissor arm rod group is in limit sliding connection with the sliding table 313.
In use, the specific working process of the advance support bracket is as follows:
1) the widths of the top guard plate 5 and the front canopy 11 of the advance support bracket are adjusted according to the width of a roadway to be tunneled, and the main support 1 continuously extends out of the front canopy 11 along with the cutting of a cutting head of the tunneling machine on the coal rock wall of the roadway, so that the roof exposed in the cutting process of the tunneling machine is supported in time; when the nose-beam 11 is completely extended out, the heading machine stops cutting;
2) the lifting hydraulic cylinder 311 of the working platform 3 retracts to enable the platform body 31 to be lowered to a proper height, the first horizontal hydraulic cylinder 33 is utilized to enable the first-level supporting platform to extend out, and the first-level supporting platform is supported on a roadway bottom plate through the vertical strut 32; then, extending out the secondary supporting platform by using a second horizontal hydraulic cylinder, erecting an upper supporting rod 111 by using a hydraulic supporting device, and supporting the front end of the front cantilever 11 by the upper supporting rod 111 through an upper hydraulic rod 112;
3) the working personnel complete the operation of lapping, networking and anchoring on the working platform 3, and realize the permanent support of the exposed top plate in the tunneling process;
4) the upper supporting rod 111 is retracted through retraction of the side hydraulic rod 113 and the upper hydraulic rod 112, the secondary supporting platform is retracted through the second horizontal hydraulic cylinder, the vertical supporting column 32 is retracted, and the primary supporting platform is retracted through the first horizontal hydraulic cylinder 33; meanwhile, the lifting hydraulic cylinder 311 of the working platform 3 extends outwards to enable the platform body 31 to rise to a position which is about 200mm away from the top guard plate 5 of the main support 1, the lifting upright post 6 of the main support 1 retracts to enable the top guard plate 5 of the main support 1 to slightly descend and to be separated from the contact with a roadway top plate, then the pushing hydraulic cylinder 4 between the main support 1 and the auxiliary support 2 extends outwards, and the auxiliary support 2 is used as a fulcrum to drive the main support 1 to move forwards;
5) the lifting upright post 6 of the main bracket 1 extends outwards, so that the top guard plate 5 of the main bracket 1 is re-supported on the roadway top plate which is just permanently supported; meanwhile, the lifting upright post 6 of the auxiliary support 2 retracts to enable the top protection plate 5 of the auxiliary support 2 to be separated from the roadway roof, and the auxiliary support 2 moves forwards by retracting the pushing hydraulic cylinder 4 between the main support 1 and the auxiliary support 2 and taking the main support 1 as a fulcrum; after the auxiliary support 2 is moved forwards, the lifting upright post 6 of the auxiliary support 2 extends outwards, so that the top guard plate 5 of the auxiliary support supports the roadway roof again; and finishing one working cycle, restarting the tunneling machine to cut the coal rock wall of the roadway, and starting the next working cycle.
The advance support bracket can support the roadway roof exposed when the heading machine cuts in time, and meanwhile, in one working cycle, the heading machine can realize multiple times of propulsion, the heading distance is obviously increased, the phenomena that the heading machine has to dig one anchor and has short heading distance and the heading machine frequently withdraws in the original heading operation are avoided, and the heading efficiency of the roadway is improved; meanwhile, the working unit is provided with the working platform, so that an operator can conveniently stand on the working platform to carry out lapping, networking and anchoring operation, the phenomenon that a worker frequently moves the escalator and needs a specially-assigned person to support the escalator in the original tunneling operation is avoided, the number of the operating personnel is reduced, the labor intensity of the worker is reduced, the operating efficiency is improved, and the safety of the worker operation is guaranteed; the working platform is provided with the scissor arm rod group, and the working platform has good stability when being lifted; in addition, the working platform is provided with a multi-stage supporting platform, the structure is compact, the working range is large, and the working efficiency of the lapping, networking and anchoring operation is improved.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents.
In the description of the present invention, it is to be understood that the terms "front", "rear", "left", "right", "center", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the scope of the present invention.
Claims (4)
1. The utility model provides a quick advance support of synthesizing mechanized tunnelling with adjustable which characterized in that: the device comprises a main support, an auxiliary support and a working platform, wherein the main support and the auxiliary support are of split structures which are bilaterally symmetrical, the auxiliary support is arranged at the rear end of the main support and is connected with the main support through a pushing hydraulic cylinder, and the working platform can be arranged on the inner side of the main support in a lifting manner and is positioned below the main support;
the main support and the auxiliary support respectively comprise a top guard plate, a lifting upright post and a base, and a four-bar linkage structure is arranged between the top guard plate and the base;
the top guard plate comprises a plurality of left guard plates and right guard plates which are arranged in a hollow mode, adjusting beams are correspondingly inserted into the left guard plates and the right guard plates, and adjusting beam hydraulic cylinders are arranged in the left guard plates and the right guard plates in a matched mode, so that the distance between the left guard plates and the right guard plates can be adjusted;
the front end part of the top guard plate of the main support is also provided with a front canopy which can stretch along the tunneling direction, the front canopy is in a bilaterally symmetrical split structure, and the left and right distance between the front canopy and the front canopy is adjusted through a front canopy adjusting beam in the middle;
the working platform comprises a platform body, a vertical strut and a horizontal hydraulic cylinder, wherein the platform body is a multi-stage supporting platform arranged along the tunneling direction and stretches along the tunneling direction under the action of the horizontal hydraulic cylinder; the vertical strut is telescopically arranged at the front end part of the platform body and supported between the platform body and the roadway bottom plate, and a lifting hydraulic cylinder is arranged between the platform body and the base and drives the platform body to lift vertically;
the front end part of the working platform is also provided with a hydraulic supporting device for supporting the upper front canopy, and the hydraulic supporting device is arranged in a vertically telescopic manner;
the hydraulic support device comprises an upper support rod, an upper hydraulic rod vertically arranged and a side hydraulic rod hinged with the upper hydraulic rod, and the other end of the side hydraulic rod is hinged with the platform body; the upper support rod is fixedly arranged at the top of the upper hydraulic rod and is driven by the upper hydraulic rod and the side hydraulic rod to perform telescopic and swinging motion;
the multi-stage supporting platform comprises a front-to-back secondary supporting platform and a primary supporting platform, and the horizontal hydraulic cylinder comprises a first horizontal hydraulic cylinder and a second horizontal hydraulic cylinder;
the tail end part of the first horizontal hydraulic cylinder is fixedly arranged at the rear end part of the platform body, and the head end part of the first horizontal hydraulic cylinder is connected with the primary supporting platform;
the tail end part of the second horizontal hydraulic cylinder is fixedly arranged at the rear end part of the primary supporting platform, and the head end part of the second horizontal hydraulic cylinder is connected with the secondary supporting platform;
a vertically adjustable lifting platform is further arranged below the platform body, the top end of the lifting platform is connected with the lower side surface of the platform body, and the bottom end of the lifting platform is connected with the base;
the use method of the adjustable type advance support bracket for rapid comprehensive mechanized excavation comprises the following steps:
1) the width of a top guard plate and a front canopy of the advance support bracket is adjusted according to the width of a roadway to be tunneled, a main support continuously extends out of the front canopy along with the cutting of a cutting head of the tunneling machine on the coal rock wall of the roadway, timely support of a top plate exposed in the cutting process of the tunneling machine is realized, and when the front canopy is completely extended out, the tunneling machine stops cutting;
2) retracting a lifting hydraulic cylinder of the working platform to enable the platform body to be lowered to a proper height, extending a primary supporting platform of the multi-stage supporting platform by utilizing a first horizontal hydraulic cylinder, and supporting the primary supporting platform on a roadway bottom plate through a vertical strut; then, extending out a secondary supporting platform of the multistage supporting platform by using a second horizontal hydraulic cylinder, erecting an upper supporting rod by using a hydraulic supporting device, and supporting the front end of the front cantilever by the upper supporting rod through an upper hydraulic rod;
3) the working personnel complete the operations of lapping, networking and anchoring on the working platform, and realize the permanent support of the exposed top plate in the tunneling process;
4) the upper supporting rod is recovered through retraction of the side hydraulic rod and the upper hydraulic rod, the secondary supporting platform is retracted through the second horizontal hydraulic cylinder, the vertical supporting column is retracted, and the primary supporting platform is retracted through the first horizontal hydraulic cylinder; meanwhile, a lifting hydraulic cylinder of the working platform extends outwards to enable the platform body to rise to a position which is about 200mm away from a top guard plate of the main support, a lifting upright post of the main support retracts to enable the top guard plate of the main support to slightly descend and to be separated from a roadway roof, and then the pushing hydraulic cylinder between the main support and the auxiliary support extends outwards and drives the main support to move forwards by taking the auxiliary support as a fulcrum;
5) the lifting upright posts of the main support extend outwards, so that the top guard plate of the main support is re-supported on the roadway roof which is just permanently supported; meanwhile, the lifting upright post of the auxiliary support retracts to enable the top guard plate of the auxiliary support to be separated from the top plate of the roadway, and the auxiliary support moves forwards by retracting through a pushing hydraulic cylinder between the main support and the auxiliary support and taking the main support as a fulcrum; after the auxiliary support is moved forwards, the lifting upright posts of the auxiliary support extend outwards, so that the top protective plate of the auxiliary support supports the roadway roof again;
and finishing one working cycle, restarting the tunneling machine to cut the coal rock wall of the roadway, and starting the next working cycle.
2. The adjustable advance support bracket for rapid comprehensive mechanized excavation according to claim 1, wherein: the elevating platform is established to cut fork arm pole group, and equal corresponding articulated base and the slip table of being equipped with on the downside of base and work platform, cuts one side of fork arm pole group and articulated base are articulated, the spacing sliding connection of opposite side and slip table.
3. The adjustable advance support bracket for rapid comprehensive mechanized excavation according to claim 1, wherein: the four-bar linkage adopts a crane type linkage.
4. The adjustable advance support bracket for rapid comprehensive mechanized excavation according to claim 1, wherein: and the front end part of the top guard plate of the main support is also provided with a top hydraulic cylinder in control connection with the forepoling bar to drive the forepoling bar to stretch along the tunneling direction.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111123024B (en) * | 2020-02-13 | 2024-05-31 | 河北翔卓电力科技有限公司 | High-voltage mobile test platform |
| CN112302698B (en) * | 2020-10-28 | 2022-08-12 | 贵州理工学院 | Folding hydraulic tunnel supporting device convenient to carry |
| CN113622969B (en) * | 2021-08-21 | 2023-09-22 | 华东矿用设备有限公司 | Mining hydraulic supporting device |
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| CN110080811A (en) | 2019-08-02 |
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