CN114635710A - Full-excavation semi-support method for cut roadway - Google Patents
Full-excavation semi-support method for cut roadway Download PDFInfo
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- CN114635710A CN114635710A CN202210250249.2A CN202210250249A CN114635710A CN 114635710 A CN114635710 A CN 114635710A CN 202210250249 A CN202210250249 A CN 202210250249A CN 114635710 A CN114635710 A CN 114635710A
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- roadway
- excavation
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- support system
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000009412 basement excavation Methods 0.000 title claims abstract description 28
- 230000005641 tunneling Effects 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000003245 coal Substances 0.000 claims description 21
- 238000010276 construction Methods 0.000 abstract description 7
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000005065 mining Methods 0.000 description 14
- 230000006978 adaptation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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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
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D19/00—Provisional protective covers for working space
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
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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
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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
- E21D9/10—Making by using boring or cutting machines
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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
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/126—Loading devices or installations
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a full-tunneling semi-support method for an open-cut roadway, which comprises the following steps: setting an initial tunneling area behind the propelling direction of the working face; arranging a temporary support system in an initial excavation region, driving the temporary support system for a preset length along the trend direction of a guide roadway by a driving mechanism below the temporary support system, and then arranging a support behind the temporary support system after the temporary support system is propelled for the preset length along the driving direction; and synchronously mounting the finished bracket; the invention achieves the purpose of widening the guide roadway by tunneling again beside the guide roadway, and the supports are synchronously arranged by depending on the temporary support system in the roadway expanding process, thereby reducing the exposed area of the top plate during construction, shortening the time of top plate exposure during mounting the supports, effectively reducing the risk during top plate support, improving the construction efficiency by synchronously tunneling and arranging the supports, reducing the workload of workers, and reducing the use of materials compared with anchor rod support.
Description
Technical Field
The invention relates to the technical field of coal mining, in particular to a full-excavation semi-support method for an open cut tunnel.
Background
Mining is the mining of coal seams that are buried too deeply and are not suitable for surface mining, and access to the coal seam can be obtained by three methods, namely, a vertical shaft, an inclined shaft and a footrill, wherein the vertical shaft is a vertical shaft dug from the ground to provide access to a certain coal seam or a plurality of coal seams. Vertical wells drilled from one coal seam to another are called blind wells. Under the well, the mined coal is poured into a coal bunker which is arranged beside the vertical shaft below the coal seam level, and then is lifted up from the well by being filled into a vertical shaft skip.
In the prior art, when an eye is cut, two methods are adopted, one method is to form a lane at one time: the whole width of the cut hole is tunneled at one time, and a supporting device is not adopted, so that the method not only risks the empty top operation during operation, but also causes huge resource waste because the coal bed above the whole cut hole cannot be exploited due to the installation of the hydraulic support. The other is multiple lane forming: the method comprises the steps of firstly digging out a roadway, carrying out temporary support, then expanding the roadway and carrying out permanent support.
The above problems are present in both a solid filling and fully mechanized mining mixed face mining method as disclosed in publication No. CN104405437B and a cooperative operation method for realizing face mining and protecting pillar recovery as disclosed in publication No. CN 109869151A.
In order to solve the problems, the invention provides a full-tunneling semi-support method for opening and cutting a roadway, which solves the problems of slow construction progress and low efficiency of the traditional coal mining.
Disclosure of Invention
The invention aims to provide a full-tunneling semi-supporting method for an open-cut roadway, and the aims of improving the coal mining efficiency and the mining progress are fulfilled.
In order to achieve the purpose, the invention provides the following scheme:
a full-tunneling semi-supporting method for an open-cut roadway comprises the following steps:
firstly, a guide roadway is communicated between a transport roadway and a return airway, and an initial tunneling area with the same height as the guide roadway is arranged behind the propelling direction of a working surface of the guide roadway along the direction vertical to the trend direction of the guide roadway;
step two, arranging a temporary support system in the initial excavation region, driving the temporary support system for a preset length along the trend direction of a guide roadway below the temporary support system by a driving mechanism, and then arranging a support behind the temporary support system after the temporary support system is propelled for the preset length along the driving direction;
and step three, repeating the step two until the tunneling length of the tunneling mechanism is the same as that of the guide roadway, and synchronously installing the support.
Preferably, an assembly chamber is arranged in the initial excavation region, and the temporary support system and the excavation mechanism are assembled in the assembly chamber.
Preferably, the ripping mechanism includes a scraper conveyor, a reversed loader, and a ripper.
Preferably, the preset length is 2m to 3 m.
Preferably, the guide roadway is supported by a bolt and anchor cable support system.
Preferably, after the tunnelling is completed, modular dedicated tracks are laid within the tunnelling tunnel and used to transport the coal charge.
Preferably, the temporary bracing system comprises a sliding temporary bracing device.
Preferably, the support is a hydraulic support.
Preferably, the coal seam at the top of the excavation tunnel is mined by a caving method.
Compared with the prior art, the invention has the following technical effects:
1. the invention achieves the purpose of widening the guide roadway by tunneling again beside the guide roadway, and the supports are synchronously arranged by depending on the temporary support system in the roadway expanding process, thereby reducing the exposed area of the top plate during construction, shortening the time of top plate exposure during mounting the supports, effectively reducing the risk during top plate support, improving the construction efficiency by synchronously tunneling and arranging the supports, reducing the workload of workers, and reducing the use of materials compared with anchor rod support.
2. According to the invention, the assembly chamber is arranged in the initial excavation region, and the temporary support system and the excavation mechanism are assembled in the assembly chamber, so that the temporary support system and the excavation mechanism are assembled underground, and the problem of potential safety hazard when the whole body is transported from the ground to the underground is avoided.
3. The invention adopts a caving method to mine the coal seam at the top of the tunneling channel.
Drawings
In order to more clearly illustrate the present invention or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic diagram of the coal mining equipment of the present invention;
wherein, 1, a transportation lane; 2. a return airway; 3. a guide roadway; 4. an initial tunneling area; 5. a sliding temporary support device; 6. a heading machine; 7. a modular dedicated track.
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.
The invention aims to provide a full-tunneling semi-supporting method for an open-cut roadway, and the aims of improving the coal mining efficiency and the mining progress are fulfilled.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1, a full-excavation semi-supporting method for an open cut tunnel includes the following steps: firstly, a guide roadway 3 is communicated between a transport roadway 1 and a return airway 2, and an initial tunneling area 4 with the same height as the guide roadway 3 is arranged behind the propelling direction of the working face of the guide roadway 3 along the direction vertical to the trend direction of the guide roadway 3; step two, arranging a temporary support system in the initial tunneling area 4, tunneling a preset length below the temporary support system by a tunneling mechanism along the direction of the guide roadway 3, propelling the temporary support system for a preset length along the tunneling direction, and arranging a support behind the temporary support system; step three, repeating the step two until the tunneling length of the tunneling mechanism is the same as that of the guide roadway 3, and synchronously installing the finished support; according to the invention, the aim of widening the guide roadway 3 is achieved by performing tunneling again beside the guide roadway 3, and the supports are synchronously arranged by virtue of the temporary support system in the roadway expanding process, so that the roof exposure area during construction is reduced, the roof exposure time during mounting of the supports is shortened, the risk during roof support is effectively reduced, the construction efficiency is improved by performing the tunneling and the support arrangement synchronously, the workload of workers is reduced, and compared with anchor rod support, the use of materials is reduced.
Referring to fig. 1, an assembly chamber is provided in an initial excavation region 4, and a temporary support system and an excavation mechanism are assembled in the assembly chamber; the temporary support system and the tunneling mechanism are assembled underground, and the problem of potential safety hazards existing when the whole body is transported to the underground from the ground is solved.
Referring to fig. 1, the ripping mechanism includes a scraper conveyor, a reversed loader, and a ripper 6.
Furthermore, the preset length is 2m to 3m, the preset length is matched with the length of the temporary support system, and when the temporary support system is movably erected, tunneling with the preset length is completed, so that assembly line type matching between tunneling and temporary support is guaranteed, and the tunneling and support efficiency is improved.
Further, the support of the guide roadway 3 adopts an anchor rod and anchor cable support system.
Referring to fig. 1, after the driving is completed, a modular dedicated track 7 is laid in the driving tunnel and used to transport the coal.
Referring to fig. 1, the temporary bracing system includes a sliding type temporary bracing device 5.
Furthermore, the support is a hydraulic support.
And further, mining the coal bed at the top of the tunneling channel by adopting a caving method.
The adaptation according to the actual needs is within the scope of the invention.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. A full-tunneling semi-supporting method for an open-cut roadway is characterized by comprising the following steps:
firstly, a guide roadway is communicated between a transport roadway and a return airway, and an initial tunneling area with the same height as the guide roadway is arranged behind the advancing direction of a working face along the direction vertical to the trend direction of the guide roadway;
step two, arranging a temporary support system in the initial excavation region, driving the temporary support system for a preset length along the trend direction of a guide roadway below the temporary support system by a driving mechanism, and then arranging a support behind the temporary support system after the temporary support system is propelled for the preset length along the driving direction;
and step three, repeating the step two until the tunneling length of the tunneling mechanism is the same as that of the guide roadway, and synchronously installing the support.
2. The full-excavation semi-supporting method for the open-cut roadway, as claimed in claim 1, wherein an assembly chamber is provided in the initial excavation region, and the temporary supporting system and the excavation mechanism are assembled in the assembly chamber.
3. The full-excavation semi-supporting method for the open-cut roadway according to claim 1, wherein the excavation mechanism comprises a scraper conveyor, a reversed loader and an excavation machine.
4. The method for full-tunneling half-supporting for open-cut roadways according to claim 1, wherein the preset length is 2m to 3 m.
5. The full-excavation semi-support method for the open-cut roadway according to claim 1, wherein the support of the guide roadway adopts a bolt-anchor support system.
6. The full-excavation semi-supporting method for the open-cut roadway according to claim 1, wherein after excavation is completed, modular special rails are laid in the excavation channel and used for transporting coal materials.
7. The full-excavation semi-supporting method for the open cut roadway according to claim 1, wherein the temporary supporting system comprises a sliding type temporary supporting device.
8. The method for full-tunneling and semi-supporting of an open-cut roadway according to claim 1, wherein the supports are hydraulic supports.
9. The full-excavation semi-supporting method for the open-cut roadway according to claim 1, characterized in that the coal seam at the top of the excavation channel is exploited by a roof-caving method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210250249.2A CN114635710A (en) | 2022-03-15 | 2022-03-15 | Full-excavation semi-support method for cut roadway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210250249.2A CN114635710A (en) | 2022-03-15 | 2022-03-15 | Full-excavation semi-support method for cut roadway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114635710A true CN114635710A (en) | 2022-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210250249.2A Pending CN114635710A (en) | 2022-03-15 | 2022-03-15 | Full-excavation semi-support method for cut roadway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114635710A (en) |
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2022
- 2022-03-15 CN CN202210250249.2A patent/CN114635710A/en active Pending
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