CN114352286A - Quick construction supporting method for fully mechanized coal mining face frame removing channel - Google Patents
Quick construction supporting method for fully mechanized coal mining face frame removing channel Download PDFInfo
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- CN114352286A CN114352286A CN202111504456.8A CN202111504456A CN114352286A CN 114352286 A CN114352286 A CN 114352286A CN 202111504456 A CN202111504456 A CN 202111504456A CN 114352286 A CN114352286 A CN 114352286A
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- 239000003245 coal Substances 0.000 title claims abstract description 32
- 238000010276 construction Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005065 mining Methods 0.000 title claims abstract description 23
- 230000005641 tunneling Effects 0.000 claims abstract description 15
- 238000005553 drilling Methods 0.000 claims abstract description 14
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 238000004140 cleaning Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 41
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/155—Laggings made of strips, slats, slabs or sheet piles
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
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Abstract
The invention discloses a quick construction supporting method for a fully mechanized coal mining face frame removal channel, which comprises the following steps: (a) selecting a stope face, tunneling a frame removing channel before stoping of the stope face is finished, adopting one-time full-period support for the frame removing channel during tunneling, and performing intensive drilling operation on a side roof of the frame removing channel close to a goaf; (b) the method comprises the steps of grouting a top plate grouting anchor cable in a frame removing channel, grouting a top plate crack by using a high-pressure pump after the grouting anchor cable is sealed, communicating a stope face with the frame removing channel, pushing a front end beam of a hydraulic support in the stope face to the position of the grouting anchor cable on a roadway top plate of the frame removing channel, cleaning float coal in the frame removing channel, completing the preparation work of frame removing, and achieving safe and reliable operation, high construction efficiency, low supporting cost, capability of relieving the labor intensity of workers and expanding effective construction space.
Description
Technical Field
The invention relates to the field of roadway support of a stope face, relates to a quick construction support method for a small-section support-removing channel, and particularly relates to a construction method for performing mixed support by adopting grouting anchor cables and high-strength anchor cables and performing dense drilling and joint cutting on a channel top plate in advance.
Background
The rapid development of modern scientific technology brings infinite opportunity for the coal industry in China, and with the improvement of the technical level of the coal industry, a large number of modern mines with high technical content, high production efficiency and good economic benefit are successively built and put into production, so that the overall production level of the coal industry is greatly improved, and the comprehensive mechanized coal mining process becomes the mainstream of coal mining.
The moving of the fully mechanized mining face is an important work that whether a mine can complete normal production and replace, and whether stable and high yield can be realized. The method has very important strategic significance on the continuous stable and healthy development of mine production, and the method grabs the moving preparation work of the fully mechanized coal mining face to a certain extent, thereby creating good conditions for the safe production of mines and laying a solid foundation. The frame removing channel is a necessary condition for ensuring smooth withdrawal of the working face equipment, and the frame removing channel can be quickly completed, so that the moving period of the coal working face is greatly reduced.
At present, two construction modes of moving and frame removing channels of domestic coal mine coal mining working faces are provided, the first construction method is to dig out the frame removing channels in advance, and the method has the advantages of construction in advance, small influence factors on tunneling and supporting by the outside and the like. However, in the working face extraction process, the influence of one-time advance supporting pressure is experienced, the stack type support is installed to strengthen the maintenance of the channel under the normal condition, and meanwhile, the advance supporting pressure can cause the channel to be seriously deformed before the channel is communicated, so that the space of a channel for removing the support is insufficient, the withdrawing efficiency of the hydraulic support is influenced, the utilization rate of the space for removing the support is low, and the withdrawing efficiency of the support is also influenced due to the existence of the stack type support;
generally, there is another method that when the support is pushed to the retracting position, the coal is cut by the coal mining machine, and the anchor rod and the anchor cable are arranged to form the retracting channel, the frame retracting channel formed by the second method has the advantages that the influence of the advanced bearing pressure is avoided, the surrounding rock stress is small, the stack type support is not needed to be erected, the transportation and ventilation system of the coal face can be used, the hydraulic support is used for temporarily supporting the top plate, the number of people who can be simultaneously constructed in each shift is large, and the like, but the following disadvantages are also included: the support removing channel is influenced by the advanced supporting pressure before being formed, the range of the head coal wall is large, the coal wall caving is serious due to the fact that corresponding anti-caving measures need to be taken for the coal wall, an anchor rod cable needs to be arranged under a hydraulic support for a top plate to control the top plate to sink, construction is influenced, and potential safety hazards exist. Meanwhile, the roof anchor rod anchor cable is constructed under the support, so that construction is influenced.
Under the circumstances, a new construction mode for moving and removing the frame channel of the coal face is needed to be developed, so that the moving efficiency of the face is improved, the labor intensity of workers is relieved, and the safety of the operation process is improved.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide a quick construction support method for a fully mechanized coal mining face frame removal channel, which has the advantages of safe and reliable operation, high construction efficiency, low support cost, capability of relieving the labor intensity of workers and expansion of effective construction space.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a quick construction supporting method for a fully mechanized coal mining face frame removal channel, which comprises the following steps:
(a) selecting a stope face, tunneling a frame withdrawing channel on a stope line before stoping of the stope face is finished, adopting one-time full-period support for the frame withdrawing channel during tunneling, and performing intensive drilling operation on a side roof of the frame withdrawing channel close to a goaf at a position 50m after the support operation; the primary full-period support specifically comprises the following steps:
(a1) when the frame removing channel is tunneled, a top anchor rod of phi 20mm left-handed non-longitudinal rib equal-strength deformed steel bar, a diamond-shaped metal net are laid on a roadway top plate of the frame removing channel along the tunneling direction of the frame removing channel to be matched with a w-shaped steel belt and a tray for supporting;
(a2) supporting roadway roof plates of every other row of top anchor rods by using anchor cables with the diameter of phi 17.8mm to match w-shaped steel belts and a tray, wherein the w-shaped steel belts are arranged vertically to the direction of a frame removal channel;
(a3) supporting a roadway roof at the interval of top anchor rods without anchor cable supports by matching a w-shaped steel belt and a tray with 1 x 19 strands of high-strength anchor cables with the specification of phi 21.8 and a grouting anchor cable with the specification of phi 21.6, wherein the w-shaped steel belt is arranged in parallel with the direction of the roadway and is connected along the tunneling direction of a frame withdrawal channel, and the grouting anchor cable is arranged on one side close to a stope face;
(a4) adopting a phi 20mm right-handed full-thread slope anchor rod and paving a diamond metal net at the slope part of the frame removing channel far away from the stope face, and matching w-shaped steel belts and a tray 13 for supporting, wherein the w-shaped steel belts are vertical to the frame removing channel;
(a5) supporting by adopting a slope anchor rope with the diameter of phi 17.8mm at the waist line of the slope of the frame removing channel in cooperation with a w-shaped steel belt and a tray, wherein the w-shaped steel belt is parallel to the direction of the frame removing channel;
(a6) adopting a phi 20mm right-handed full-thread slope anchor rod and a diamond-shaped metal net to match w-shaped steel belts and a tray for supporting at the slope part of the frame removing channel close to the stope face, wherein the w-shaped steel belts are vertical to the frame removing channel, and completing the full-period supporting of the frame removing channel;
(b) when the stope face stope reaches a distance of 25-35m from the frame removing channel, grouting the grouting anchor cable of the tunnel top plate of the frame removing channel, grouting the crack of the tunnel top plate by using a high-pressure pump after the grouting anchor cable is sealed, filling the crack and the hole body of the broken top plate, and cementing the tunnel top plate of the frame removing channel into a whole;
(c) and (3) communicating the stope face with the frame removing channel, pushing a front end beam of a hydraulic support in the stope face to the position of a grouting anchor cable on the top plate of a roadway of the frame removing channel, ensuring stable and safe support of the top plate of the roadway, cleaning float coal in the frame removing channel, finishing construction of the frame removing channel of the stope face, and completing preparation work of frame removing.
Preferably, in the step (b), when the grouting anchor cable is subjected to grouting work, the grouting material is ultrafine cement, and the grouting pressure is not greater than 5 MPa.
Preferably, in the step (b), when the stope face is stoped to a distance of 30m from the rack-removing channel, grouting is performed on the top plate grouting anchor cable in the rack-removing channel.
Preferably, the number of the anchor cables arranged in the step (a2) is: the number of each row of anchor cables is at least two.
Preferably, in step (a3), the number of the high-strength anchor cables and the grouting anchor cables is: the number of each row of high-strength anchor cables is at least one; the number of each row of grouting anchor cables is at least two.
Preferably, the number of the arranged anchor cables in the step (a5) is as follows: the number of anchor cables on each row of side parts is at least one.
Preferably, in the step (c), the stope face is communicated with the rack removing channel when the stope face is stoped to a distance of 1m from the rack removing channel.
The invention has the beneficial effects that:
(1) according to the invention, a mixed support mode of grouting anchor cables and high-strength anchor cables is adopted, so that the support efficiency is obviously improved, especially for a small-section stoping roadway, the operation space utilization rate is greatly improved, the support strength at the top can be improved, and the stability is kept and the damage is not easy to generate.
(2) The one-time full-period supporting mode greatly improves the construction efficiency of the roadway, achieves one-time permanent supporting, greatly reduces the subsequent maintenance drilling repair cost of the roadway, cancels the single supporting of the previous frame removing channel during the frame removing period of the fully mechanized coal mining face, reduces the operation intensity, improves the operation efficiency, greatly improves the space effective utilization rate, reduces the labor intensity of workers and improves the operation safety.
(3) The roof is pre-cracked through the intensive drilling, so that the deformation of the support removing channel and the stress of the roof when the support is disturbed by the back production are further reduced, the safety of the subsequent working face support removing is improved, the support cost of the support removing channel is reduced, one-time full-period roadway forming is realized, the operation steps are reduced, and the support removing efficiency is greatly improved for the support removing channel of the small-section fully mechanized mining working face.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a construction plan view of a frame-removing channel of a stope face structure in the implementation of the invention.
Fig. 2 is a cross-sectional view of a rack-removing passage support in the practice of the present invention.
Fig. 3 is a plan view of a rack-removing tunnel support in the practice of the present invention.
Fig. 4 is a schematic view of rack removal passage intensive drilling in the practice of the present invention.
Fig. 5 is a graph of the parameters of rack removal passage drilling in the practice of the present invention.
Fig. 6 is a schematic through view of a rack removing passage on a working surface in the embodiment of the invention.
In the figure, 1, a coal rock mass; 2. a gob; 3. stoping the working face; 4. a working face stoping gate; 5. a rack removal channel; 6. stopping the mining line; 7. grouting an anchor cable; 8. an anchor cable; 9. a high-strength anchor cable; 10. a top anchor rod; 11. an upper anchor rod; 12. side anchor cables; 13. a tray; 14. laying a diamond metal net; 15. a w-shaped steel strip; 16. a hydraulic support; 17. and (6) drilling.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the coal rock mass 1, the goaf 2, the stoping face 3, the face stoping gateway 4 and the rack removing channel 5 are in the position relationship, when the stoping face 3 is to be stoped on the face for a period of time before the stoping is finished, the rack removing channel 5 of the working face is started to be tunneled at the position of the stoping line 6, one-time full-period roadway support is adopted for the rack removing channel 5, and intensive drilling operation is carried out on the lagging tunneling working face along the position close to the side roof of the goaf, and the drilling angle is 70 degrees with the horizontal direction; when the stoping working face 3 stopes to a distance of 25-35m from the frame removing channel, carrying out grouting work on the top plate grouting anchor cable 7 in the frame removing channel 5; when the distance between the stope face 3 and the frame removing channel 5 is 1m, the coal wall between the frame removing channel 5 and the stope face 3 is communicated, and the hydraulic support 16 is moved, so that the front end beam of the hydraulic support 16 is positioned below the top plate grouting anchor cable 7 of the frame removing channel 5, as shown in fig. 4; and cleaning float coal in the rack removing channel, namely completing the preparation work of rack removing.
The embodiment provides a rapid construction method for a fully mechanized coal mining face frame removal channel, which comprises the following steps:
firstly, selecting a stope face 3, and tunneling a frame-removing channel 5 in a stoping line 6 before stoping of the stope face 3 is finished; the frame removing channel 5 adopts one-time full-period support, namely, permanent support, namely anchor net support, is carried out while the frame removing channel 5 is tunneled, and the method specifically comprises the following steps: when the frame removing channel 5 is tunneled, a phi 20mm left-handed non-longitudinal rib equal-strength threaded steel anchor rod 10 is adopted on a roadway top plate of the frame removing channel 5 along the tunneling direction of the frame removing channel 5, and a diamond-shaped metal mesh 14 is laid to be matched with a w-shaped steel belt 15 and a tray 13 for supporting; the roadway top plate of each row of anchor rods is supported by using anchor cables 8 with the diameter of phi 17.8mm to match with the w-shaped steel belt 15 and the tray 13, the w-shaped steel belt 15 is vertical to the direction of the roadway, and the number of the anchor cables 8 in each row is at least two; 1 multiplied by 19 high-strength anchor cables 9 with the specification of phi 21.8 and 1 multiplied by 8 grouting anchor cables 7 with the specification of phi 21.6 are matched with a w-shaped steel belt 15 and a tray 13 to support on a roadway top plate at an anchor rod interval without anchor cable 8 support, the w-shaped steel belt 15 is parallel to the direction of the roadway at the moment, the w-shaped steel belt 15 is closely connected along the roadway in a tunneling manner, at least one high-strength anchor cable 9 is arranged in each row, at least two grouting anchor cables 7 are arranged, and the grouting anchor cables 7 are arranged on one side close to a stope face; the part of the roadway far away from the stope face is supported by a phi 20mm right-handed full-thread anchor rod 11, a diamond-shaped metal net 14, a w-shaped steel belt 15 and a tray 13, and the w-shaped steel belt 15 is perpendicular to the roadway; supporting by adopting anchor cables 12 with the diameter of phi 17.8mm at the waist line of the side part of the roadway in cooperation with w-shaped steel belts 15 and trays 13, wherein the number of each row of anchor cables is at least one, and the w-shaped steel belts 15 are parallel to the direction of the roadway at the moment; the part of the roadway close to the stope face is supported by a rhombic metal mesh 14 paved by a right-handed full-thread anchor rod 11 with the diameter of 20mm in cooperation with a w-shaped steel belt 15 and a tray 13, and the w-shaped steel belt 15 is perpendicular to the roadway at the moment to complete the full-period support of the frame-removing channel; dense drilling work of drilling 17 is performed on the roof on the side of the goaf of the rack-removed passage at the position of 50m of the delayed supporting work, as shown in fig. 4 and 5, wherein the dense drilling work is a conventional work well known to those skilled in the art and will not be described in detail.
And secondly, when the stoping working face 3 is stoped to a position 30m away from the frame removing channel 5, grouting is conducted on a top plate grouting anchor cable 7 in the frame removing channel 5, grouting is conducted on cracks of the top plate by using a high-pressure pump after the grouting anchor cable 7 is sealed, the cracks and holes of the broken top plate are filled, the frame removing roadway top plate is cemented into a whole, superfine cement is preferentially used as a grouting material, and the grouting pressure is not more than 5 MPa.
And thirdly, communicating the stope face 3 with the frame removing channel 5, pushing a front end beam of a hydraulic support 16 in the stope face 3 to the position of a grouting anchor rope 7 on a top plate of the frame removing channel 5, ensuring stable and safe support of the top plate, cleaning float coal in the frame removing channel 5, finishing construction of the frame removing channel of the stope face, and finishing preparation work of frame removing.
The roadway in this example is the rack-removing channel 5.
The positional relationship of the hydraulic prop 16 to the stope face 3 and the manner of use of the hydraulic prop 16 of this example are known to those skilled in the art.
The grouting anchor cable 7, anchor cable 8, high-strength anchor cable 9, top anchor rod 10, side anchor rod 11, side anchor cable 12, tray 13, diamond-shaped metal net 14, w-shaped steel belt 15, hydraulic support 16 and drill hole 17 in the present example are conventional structures well known to those skilled in the art, and the specific structures will not be described in detail herein.
The concrete connection and installation mode of the grouting anchor cable 7, the anchor cable 8, the high-strength anchor cable 9, the top anchor rod 10, the upper anchor rod 11, the upper anchor cable 12, the tray 13, the diamond-shaped metal net 14 and the w-shaped steel belt 15 in a supporting mode is a conventional mode well known to those skilled in the art and will not be described in detail herein.
The upper part position and the upper part waist line described in this embodiment are well known to those skilled in the art, and are not specifically labeled.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A quick construction supporting method for a fully mechanized coal mining face frame removing channel is characterized by comprising the following steps:
(a) selecting a stope face (3), tunneling a frame removing channel (5) on a stope line (6) before stoping of the stope face (3) is finished, adopting one-time full-period support for the frame removing channel (5) during tunneling, and performing dense drilling operation on a side roof of the frame removing channel close to a goaf at a position 50m after the support operation; the primary full-period support specifically comprises the following steps:
(a1) when the frame removing channel (5) is tunneled, a phi 20mm left-handed non-longitudinal-rib equal-strength deformed steel bar top anchor rod (10), a diamond-shaped metal net (14) and a w-shaped steel belt (15) are matched with a pallet (13) for supporting along the tunneling direction of the frame removing channel (5) on a roadway top plate of the frame removing channel (5);
(a2) roadway roof plates of every two rows of top anchor rods (10) are supported by anchor cables (8) with the diameter of phi 17.8mm in cooperation with w-shaped steel belts (15) and trays (13), and the w-shaped steel belts (15) are arranged perpendicularly to the direction of the frame removing channel (5);
(a3) the roadway roof at the interval of top anchor rods (10) which are not supported by anchor cables (8) is supported by adopting 1 x 19 strands of high-strength anchor cables (9) with the specification of phi 21.8 and 1 x 8 strands of grouting anchor cables (7) with the specification of phi 21.6 to be matched with a w-shaped steel belt (15) and a tray (13) for supporting, the w-shaped steel belt (15) at the moment is arranged in parallel with the direction of the roadway, the w-shaped steel belt (15) is connected along the tunneling direction of a frame-removing channel (5), and the grouting anchor cables (7) are arranged on one side close to a stope face (3);
(a4) the part of the side of the frame removing channel (5) far away from the stope face (3) is supported by a phi 20mm right-handed full-thread side anchor rod (11) and a diamond-shaped metal net (14) in a matched manner with a w-shaped steel belt (15) and a tray (13), and the w-shaped steel belt (15) is vertical to the direction of the frame removing channel (5);
(a5) supporting by adopting a slope anchor cable (12) with the diameter of phi 17.8mm to match with a w-shaped steel belt (15) and a tray (13) at the slope part waist line of the frame removing channel (5), wherein the w-shaped steel belt (15) is parallel to the direction of the frame removing channel (5);
(a6) supporting the part, close to the stope face (3), of the frame removing channel (5) by adopting a phi 20mm right-handed full-thread side anchor rod (11) and a diamond-shaped metal net (14) in a matched mode with a w-shaped steel belt (15) and a tray (13), wherein the w-shaped steel belt (15) is perpendicular to the direction of the frame removing channel (5), and the full-period supporting of the frame removing channel is completed;
(b) when the stoping working face (3) is stoped to be 25-35m away from the rack removing channel (5), grouting is conducted on a grouting anchor rope (7) on a roadway top plate of the rack removing channel (5), after the grouting anchor rope (7) is sealed, grouting is conducted on cracks of the roadway top plate through a high-pressure pump, the cracks and hole bodies of the broken top plate are filled, and the roadway top plate of the rack removing channel (5) is glued into a whole;
(c) the method comprises the steps of communicating a stope face (3) with a frame removing channel (5), pushing a front end beam of a hydraulic support (16) in the stope face (3) to a position of a grouting anchor cable (7) on a roadway roof of the frame removing channel (5), ensuring stable and safe support of the roadway roof, cleaning float coal in the frame removing channel (5), finishing construction of the frame removing channel of the stope face, and completing preparation work of frame removing.
2. The method for quickly constructing and supporting the frame-removing channel of the fully mechanized mining face as claimed in claim 1, wherein in the step (b), when the grouting anchor cable (7) performs grouting work, the grouting material is ultra-fine cement, and the grouting pressure is not greater than 5 MPa.
3. The rapid construction support method for the fully mechanized mining face frame removal channel according to claim 1, wherein in the step (b), when the mining face (3) is recovered to a distance of 30m from the frame removal channel (5), the grouting operation is performed on the top plate grouting anchor cable (7) in the frame removal channel (5).
4. The rapid construction support method for the fully mechanized mining face frame-removing passage according to claim 1, wherein the anchor cables (8) in the step (a2) are arranged in the following number: the number of each row of anchor cables (8) is at least two.
5. The rapid construction support method for the fully mechanized mining face frame removal channel according to claim 1, wherein in the step (a3), the arrangement number of the high-strength anchor cables (9) and the grouting anchor cables (7) is as follows: each row of high-strength anchor cables (9) is at least one; the number of each row of grouting anchor cables (7) is at least two.
6. The rapid construction support method for the fully mechanized mining face frame-removing channel according to claim 1, wherein the number of the anchor cables (12) in the step (a5) is: the number of each row of upper anchor cables (12) is at least one.
7. The rapid construction support method for the fully mechanized mining face frame removing passage according to claim 1, wherein in the step (c), the penetration of the frame removing passage (5) and the stope face (3) is performed when the stope face (3) is stoped to a distance of 1m from the frame removing passage (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111504456.8A CN114352286A (en) | 2021-12-10 | 2021-12-10 | Quick construction supporting method for fully mechanized coal mining face frame removing channel |
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| CN202111504456.8A CN114352286A (en) | 2021-12-10 | 2021-12-10 | Quick construction supporting method for fully mechanized coal mining face frame removing channel |
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| CN114352286A true CN114352286A (en) | 2022-04-15 |
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| CN202111504456.8A Pending CN114352286A (en) | 2021-12-10 | 2021-12-10 | Quick construction supporting method for fully mechanized coal mining face frame removing channel |
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| CN (1) | CN114352286A (en) |
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