CN113847070A - Stacking type support for high-ground-pressure support and support method thereof - Google Patents
Stacking type support for high-ground-pressure support and support method thereof Download PDFInfo
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- CN113847070A CN113847070A CN202111004690.4A CN202111004690A CN113847070A CN 113847070 A CN113847070 A CN 113847070A CN 202111004690 A CN202111004690 A CN 202111004690A CN 113847070 A CN113847070 A CN 113847070A
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- 238000000034 method Methods 0.000 title claims description 17
- 230000008093 supporting effect Effects 0.000 claims abstract description 38
- 238000005520 cutting process Methods 0.000 claims description 63
- 239000003245 coal Substances 0.000 claims description 36
- 238000005065 mining Methods 0.000 claims description 33
- 238000009434 installation Methods 0.000 claims description 14
- 238000010276 construction Methods 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 239000000178 monomer Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
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Abstract
The invention discloses a stack type support for supporting high ground pressure, which is formed by arranging a plurality of support bodies at intervals, wherein each support body comprises a base, two telescopic vertical columns are symmetrically arranged at the top of the base along the central line, a hydraulic device for controlling the telescopic of the vertical columns is arranged between each vertical column and the corresponding base, a cross beam for supporting is arranged at the top of each vertical column, and a plurality of lifting rings are arranged on two sides of each base, each vertical column, each hydraulic device and each cross beam.
Description
Technical Field
The invention belongs to the field of mine tunnel support, and particularly relates to a stack type support for high-pressure support and a support method thereof.
Background
In recent years, with the development of mechanized and intelligent coal mining and the popularization of comprehensive mechanized mining, coal mining machines such as coal mining machines and hydraulic supports are becoming larger. In order to meet the requirement of installation of large equipment on a coal face, the size of a section of a cutting hole is continuously increased, the control of surrounding rocks is increasingly difficult, particularly, the problems of roof caving, two-side extrusion, bottom bulging and the like frequently occur in a high-pressure environment, the cutting hole needs to be repeatedly repaired for many times during the service period, and the normal production of a coal mine, the normal work of underground equipment and the safety of workers are seriously influenced. Therefore, the safety in the process of cutting and tunneling and the stability in service period play an important role in normal operation of equipment in the working face mining and fully mechanized mining working face.
The traditional temporary support mode for cutting holes comprises single-prop support, anchor rod cable support, and canopy support, but the traditional support mode for cutting holes is slow in speed and low in strength, and cannot meet the requirements of safe and efficient support for cutting holes of large-section high-pressure fully-mechanized mining. At present, the large-section hole cutting construction process is generally constructed by a secondary tunneling method, wherein hole cutting pilot tunnel is constructed firstly, and then hole cutting construction is brushed to be large. However, aiming at the large-section high-ground pressure fully-mechanized mining cutting hole, the traditional support has the defects of low support strength, complex operation procedure, heavy task of workers, low automation degree and the like. Therefore, a new supporting mode is urgently needed to strengthen the supporting effect and meet the supporting requirements of the large-section high-ground-pressure fully-mechanized mining cutting hole.
Disclosure of Invention
The invention aims to provide a stack type support for high-ground pressure support and a support method thereof.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a buttress formula support for high earth pressure is strutted, should strut and constitute according to the interval arrangement by a plurality of support bodies, and the support body includes the base, the base top is provided with two telescopic stands along the central line symmetry, is provided with the flexible hydraulic means of control stand between this stand and the base, and the top of stand is provided with the crossbeam that is used for supporting base, stand, hydraulic means and crossbeam's both sides are provided with a plurality of rings that play.
The invention discloses a stack type support for high ground pressure support, wherein an upright column consists of a lower column body and an upper column body, the upper column body is plugged into an inner cavity formed in the lower column body, the bottom of the upright column is arranged at the output end of a hydraulic device and receives power output by the hydraulic device, and the upper column body lifts or lowers a cross beam by receiving the power input by the lower column body.
The invention discloses a stack type support for high ground pressure support, wherein the bottom of an upper cylinder is arranged in an inner cavity of a lower cylinder, and the bottom of the upper cylinder is connected with a power output end of a hydraulic device through the inner cavity of the lower cylinder so as to receive power output by the hydraulic device.
The invention discloses a stack type support for high ground pressure support, wherein two sides of a cross beam are symmetrically provided with two lifting rings respectively, two sides of each upright post are provided with one lifting ring respectively, and two positions of two sides of a base, which are close to a central line, are provided with two lifting rings respectively and are symmetrically arranged.
The invention discloses a supporting method for high-pressure support, which comprises the following steps:
s1, arranging a monorail crane near the center line of the top plate of the pilot tunnel for hole cutting;
s2, constructing most of the eye-cutting brush according to the design size of the eye-cutting section;
s3, assembling and checking the stack type support on the ground, and fixing the stack type support on the transportation equipment to be transported to a construction site after ensuring complete installation of the support and firm fixation of the pipeline;
s4, calculating the reasonable rack spacing and the initial supporting force P of the stack type support;
s5, transporting the bracket to the installation position in the incision by using a lifting ring through a monorail crane or other transportation equipment, and moving and adjusting the bracket to an accurate supporting position by using a side-push jack or a hook winch in cooperation with the monorail crane;
s6, arranging stacking supports at calculated intervals along the large central line of the cutting brush for supporting a canopy, removing part of single supports in the adjacent cutting pilot tunnel for convenient installation, reinforcing the canopy by using the single supports at a distance of 0.5m away from the position of the stacking supports, and removing the reinforced canopy after the stacking supports are arranged;
s7, after the stacking type support pipeline is determined to be installed perfectly, lifting the upright post to be connected with the top until the initial supporting force is reached, and keeping the liquid supply state for 3-5 seconds to enable the upright post to have enough initial supporting force;
s8, repeating the sixth step, the seventh step and the eighth step until the hole cutting construction is completed;
and S9, after the service of the stack type support is finished, removing the stack type support, and conveying out the cutting hole by matching with a monorail crane so as to install fully mechanized mining equipment.
The invention discloses a supporting method for high ground pressure supporting, wherein in the step S4, the reasonable rack spacing and the initial supporting force P of a stack type support are calculated, and the reasonable rack spacing and the initial supporting force P are calculated according to the formula P k F/S, wherein P is the initial supporting force of the stack type support, S is the cross section area of a hydraulic support, F is the design rated working resistance of the support, k is the different ratio of the initial supporting force of the support to the working resistance, wherein for the top plates of I-type and II-type coal beds, k is 0.75-0.85, and for the top plates of III-type and IV-type coal beds, k is 0.60-0.75; given the maximum working resistance and the required support strength of the design of the stacked support, the maximum spacing between the stacked support and the required support strength can be calculated. The calculation formula is as follows: d is less than or equal to (P + G)/K gamma S, wherein D is the spacing between the stack type brackets; p is the maximum working resistance designed for the stack type support; k is a safety coefficient, and is generally 1.5-3; gamma is the volume weight of the coal bed coal body; s is the sectional area of the coal body in the caving arch area after the cutting and expanding; g is the weight of the coal body required to be supported by the hole cutting pilot tunnel top plate.
By adopting the technical scheme, compared with the traditional single-prop support, the support has the advantages that the support is larger in support area and higher in support strength, the requirements of fully-mechanized mining cutting hole support design can be met at one time, the stack support is used for carrying out temporary active support when a fully-mechanized mining cutting hole brush is large, the support quality of fully-mechanized mining cutting hole surrounding rock can be improved, and the follow-up reinforcing support work is effectively reduced or even avoided; the stack type support is used for carrying out temporary active support when the fully-mechanized coal mining cutting eye brush is large, the using amount of single supports in the fully-mechanized coal mining cutting eye can be greatly reduced, and meanwhile, mechanical installation can be carried out, so that the ending period of the fully-mechanized coal mining cutting eye can be obviously shortened, and the equipment installation efficiency in the fully-mechanized coal mining cutting eye is comprehensively improved; the stack type support is used for carrying out temporary active support on the fully-mechanized coal mining cutting brush when the brush is large, so that the labor intensity of workers in the underground coal mine can be reduced, and the personal safety of the workers can be effectively guaranteed.
The invention will be explained in more detail below with reference to the drawings and examples.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
fig. 1 is a schematic structural diagram of an eye-cutting pilot tunnel according to a first embodiment of the present invention;
fig. 2 is a schematic view of the overall structure of a second embodiment of the present invention;
FIG. 3 is a schematic view of the construction of the stacking stand of the present invention;
FIG. 4 is a schematic view of the arrangement of the buttress mount in the fully mechanized coal mining pilot hole of the present invention;
in the figure: 1. a stack support; 2. a single strut; 3. an anchor rod; 4. pi-shaped steel; 5. an anchor cable; 6. u-shaped steel; 7. a base; 8. a column; 9. a cross beam; 10. a hydraulic device; 11. lifting a lifting ring; 12. a transportation lane; 13. a return airway; 14. cutting the large midline of the eye brush; 15. cutting the hole and guiding the underground; 16. and (4) fully mechanized mining eye cutting.
Detailed Description
The following description of the embodiments of the present invention, with reference to the accompanying drawings, will be made in further detail for the purpose of providing a more complete, accurate and thorough understanding of the inventive concepts and technical solutions of the present invention, including the shapes of the components, the structures, the mutual positions and connection relationships of the components, the functions and operating principles of the components, the manufacturing processes, the operation and use methods, and the like.
FIG. 3 is a schematic structural diagram of a stack support according to the present invention, which is a stack support for high ground pressure support as shown in the figure, the support is composed of a plurality of support bodies arranged at intervals, the support bodies include a base, two telescopic columns are symmetrically arranged along a central line at the top of the base, a hydraulic device for controlling the column to stretch is arranged between the column and the base, a cross beam for supporting is arranged at the top of the column, a plurality of lifting rings are arranged at two sides of the base, the column, the hydraulic device and the cross beam, the column is composed of a lower column and an upper column, the upper column is plugged into an inner cavity of the lower column, the bottom of the column is arranged at an output end of the hydraulic device and receives power output by the hydraulic device, the upper column lifts or lowers the cross beam by receiving power input by the lower column, the bottom of the upper column is arranged in the inner cavity of the lower column, and the bottom of the upper column is connected with a power output end of the hydraulic device through the inner cavity of the lower column, in order to receive the power output by the hydraulic device, two lifting rings are symmetrically arranged on two sides of the cross beam respectively, one lifting ring is arranged on each of two sides of each upright post respectively, and two lifting rings are symmetrically arranged at positions, close to the central line, on two sides of the base respectively.
The scheme also discloses a supporting method for high-pressure support, which comprises the following steps:
s1, arranging a monorail crane near the center line of the top plate of the pilot tunnel for hole cutting;
s2, constructing most of the eye-cutting brush according to the design size of the eye-cutting section;
s3, assembling and checking the stack type support on the ground, and fixing the stack type support on the transportation equipment to be transported to a construction site after ensuring complete installation of the support and firm fixation of the pipeline;
s4, calculating the reasonable rack spacing and the initial supporting force P of the stack type support;
s5, transporting the bracket to the installation position in the incision by using a lifting ring through a monorail crane or other transportation equipment, and moving and adjusting the bracket to an accurate supporting position by using a side-push jack or a hook winch in cooperation with the monorail crane;
s6, arranging stacking supports at calculated intervals along the large central line of the cutting brush for supporting a canopy, removing part of single supports in the adjacent cutting pilot tunnel for convenient installation, reinforcing the canopy by using the single supports at a distance of 0.5m away from the position of the stacking supports, and removing the reinforced canopy after the stacking supports are arranged;
s7, after the stacking type support pipeline is determined to be installed perfectly, lifting the upright post to be connected with the top until the initial supporting force is reached, and keeping the liquid supply state for 3-5 seconds to enable the upright post to have enough initial supporting force;
s8, repeating the sixth step, the seventh step and the eighth step until the hole cutting construction is completed;
and S9, after the service of the stack type support is finished, removing the stack type support, and conveying out the cutting hole by matching with a monorail crane so as to install fully mechanized mining equipment.
Calculating the reasonable rack spacing and initial support force P of the stack type support in the step S4, and setting the P as k.F/S, wherein P is the initial support force of the stack type support, S is the cross-sectional area of the hydraulic support, F is the designed rated working resistance of the support, and k is the ratio of the initial support force of the support to the working resistance, wherein k is 0.75-0.85 for the top plates of the I-type and II-type coal beds, and k is 0.60-0.75 for the top plates of the III-type and IV-type coal beds; given the maximum working resistance and the required support strength of the design of the stacked support, the maximum spacing between the stacked support and the required support strength can be calculated. The calculation formula is as follows: d is less than or equal to (P + G)/K gamma S, wherein D is the spacing between the stack type brackets; p is the maximum working resistance designed for the stack type support; k is a safety coefficient, and is generally 1.5-3; gamma is the volume weight of the coal bed coal body; s is the sectional area of the coal body in the caving arch area after the cutting and expanding; g is the weight of the coal body required to be supported by the hole cutting pilot tunnel top plate.
Referring to fig. 1, 2, 3 and 4, the invention relates to a pile-type support-based large-section high-pressure fully mechanized mining cutting-hole strengthening support method, which uses a pile-type support 1 to temporarily support a cutting hole instead of a traditional single support when the cutting hole is brushed to be large, and a support member used in support comprises: u shaped steel 6, pi shaped steel 4, stock 3, anchor rope 5, monomer pillar 2 and buttress formula support 1.
Specifically, referring to fig. 1, fig. 1 is a schematic structural diagram of an open-off cut pilot tunnel according to an embodiment of the present invention, and is also a schematic supporting diagram of the open-off cut pilot tunnel in a large-section high-pressure fully-mechanized mining open-off cut reinforced supporting method.
Specifically, please refer to fig. 2, fig. 2 is a schematic diagram of an overall structure of a cutting hole according to a second embodiment of the present invention, and is also a schematic diagram of a support when a cutting brush is large in a high-pressure fully-mechanized mining cutting hole reinforcing support method.
FIG. 3 is a schematic structural diagram of the stack support, which structurally includes a base 7, a column 8, a cross beam 9 and a hydraulic device 10, wherein the column 8 is connected to the base 7; a cross beam 9 is arranged on the upright post 8; the base 7, the upright 8 and the cross beam 9 cooperate together through a hydraulic device 10. Base 7 reserves 2 side push jack mounted position and 6 rings 11 that play, and stand 8 mainly comprises 2 two flexible stands, the stand comprises cylinder body, post, uide bushing and sealed etc. and every stand welding two rings 11 that play, and back timber mechanism 9 comprises the back timber as major structure, crossbeam both sides welding 4 rings 11 that play, hydraulic means 10 mainly by stop valve, return liquid shut-off valve, operating valve, the relief valve, liquid accuse check valve, filter etc. constitute.
By adopting the technical scheme, compared with the traditional single-prop support, the support has the advantages that the support is larger in support area and higher in support strength, the requirements of fully-mechanized mining cutting hole support design can be met at one time, the stack support is used for carrying out temporary active support when a fully-mechanized mining cutting hole brush is large, the support quality of fully-mechanized mining cutting hole surrounding rock can be improved, and the follow-up reinforcing support work is effectively reduced or even avoided; the stack type support is used for carrying out temporary active support when the fully-mechanized coal mining cutting eye brush is large, the using amount of single supports in the fully-mechanized coal mining cutting eye can be greatly reduced, and meanwhile, mechanical installation can be carried out, so that the ending period of the fully-mechanized coal mining cutting eye can be obviously shortened, and the equipment installation efficiency in the fully-mechanized coal mining cutting eye is comprehensively improved; the stack type support is used for carrying out temporary active support on the fully-mechanized coal mining cutting brush when the brush is large, so that the labor intensity of workers in the underground coal mine can be reduced, and the personal safety of the workers can be effectively guaranteed.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (6)
1. The utility model provides a buttress formula support for high earth pressure is strutted, should strut and constitute by a plurality of support bodies according to interval arrangement, and the support body includes the base, its characterized in that, the base top is provided with two telescopic stands along the central line symmetry, is provided with the flexible hydraulic means of control stand between this stand and the base, and the top of stand is provided with the crossbeam that is used for supporting base, stand, hydraulic means and the both sides of crossbeam are provided with a plurality of rings that play.
2. A stacking rack as defined in claim 1, wherein the uprights are formed by a lower upright and an upper upright and the upper upright is inserted into an inner cavity provided in the lower upright, the base being provided at the output of the hydraulic means and receiving the power output by the hydraulic means, the upper upright raising or lowering the cross-member by receiving the power input by the lower upright.
3. A stacking support as claimed in claim 2, in which the base of the upper column is located in the cavity of the lower column and the base of the upper column is connected to the power take-off of the hydraulic means via the cavity of the lower column to receive power from the hydraulic means.
4. A stacking rack as defined in claim 1, wherein the cross member is symmetrically provided with two lifting rings on each side, each of the upright posts is provided with a lifting ring on each side, and the base is symmetrically provided with two lifting rings on each side near the centerline.
5. A supporting method for high-pressure support, comprising a stacking type support for high-pressure support according to any one of claims 1 to 4, characterized by comprising the following steps:
s1, arranging a monorail crane near the center line of the top plate of the pilot tunnel for hole cutting;
s2, constructing most of the eye-cutting brush according to the design size of the eye-cutting section;
s3, assembling and checking the stack type support on the ground, and fixing the stack type support on the transportation equipment to be transported to a construction site after ensuring complete installation of the support and firm fixation of the pipeline;
s4, calculating the reasonable rack spacing and the initial supporting force P of the stack type support;
s5, transporting the bracket to the installation position in the incision by using a lifting ring through a monorail crane or other transportation equipment, and moving and adjusting the bracket to an accurate supporting position by using a side-push jack or a hook winch in cooperation with the monorail crane;
s6, arranging stacking supports at calculated intervals along the large central line of the cutting brush for supporting a canopy, removing part of single supports in the adjacent cutting pilot tunnel for convenient installation, reinforcing the canopy by using the single supports at a distance of 0.5m away from the position of the stacking supports, and removing the reinforced canopy after the stacking supports are arranged;
s7, after the stacking type support pipeline is determined to be installed perfectly, lifting the upright post to be connected with the top until the initial supporting force is reached, and keeping the liquid supply state for 3-5 seconds to enable the upright post to have enough initial supporting force;
s8, repeating the sixth step, the seventh step and the eighth step until the hole cutting construction is completed;
and S9, after the service of the stack type support is finished, removing the stack type support, and conveying out the cutting hole by matching with a monorail crane so as to install fully mechanized mining equipment.
6. The support method according to claim 5, wherein the step S4 is carried out to calculate the reasonable rack spacing of the stacked supports and the initial supporting force P, and the reasonable rack spacing and the initial supporting force P are defined as P-k-F/S, wherein P is the initial supporting force of the stacked supports, S is the cross-sectional area of the hydraulic support, F is the designed rated working resistance of the supports, and k is the different ratio of the initial supporting force to the working resistance of the supports, wherein k is 0.75-0.85 for the top plates of the coal seams of type I and type II, and k is 0.60-0.75 for the top plates of the coal seams of type III and type IV; given the maximum working resistance and the required support strength of the design of the stacked support, the maximum spacing between the stacked support and the required support strength can be calculated. The calculation formula is as follows: d is less than or equal to (P + G)/K gamma S, wherein D is the spacing between the stack type brackets; p is the maximum working resistance designed for the stack type support; k is a safety coefficient, and is generally 1.5-3; gamma is the volume weight of the coal bed coal body; s is the sectional area of the coal body in the caving arch area after the cutting and expanding; g is the weight of the coal body required to be supported by the hole cutting pilot tunnel top plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111004690.4A CN113847070A (en) | 2021-08-30 | 2021-08-30 | Stacking type support for high-ground-pressure support and support method thereof |
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| CN202111004690.4A CN113847070A (en) | 2021-08-30 | 2021-08-30 | Stacking type support for high-ground-pressure support and support method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115419425A (en) * | 2022-06-29 | 2022-12-02 | 中国矿业大学 | Cross roadway reinforced supporting method based on stack type support reinforced roof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115419425A (en) * | 2022-06-29 | 2022-12-02 | 中国矿业大学 | Cross roadway reinforced supporting method based on stack type support reinforced roof |
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