AU2015377025A1 - Thick coal seam large seam height gob-side retained passageway method - Google Patents
Thick coal seam large seam height gob-side retained passageway method Download PDFInfo
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- AU2015377025A1 AU2015377025A1 AU2015377025A AU2015377025A AU2015377025A1 AU 2015377025 A1 AU2015377025 A1 AU 2015377025A1 AU 2015377025 A AU2015377025 A AU 2015377025A AU 2015377025 A AU2015377025 A AU 2015377025A AU 2015377025 A1 AU2015377025 A1 AU 2015377025A1
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- 239000003245 coal Substances 0.000 title claims abstract description 128
- 230000000717 retained effect Effects 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005065 mining Methods 0.000 claims abstract description 156
- 238000009423 ventilation Methods 0.000 claims abstract description 22
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 6
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 6
- 238000011049 filling Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000000737 periodic effect Effects 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 abstract description 6
- 238000003763 carbonization Methods 0.000 abstract description 4
- 238000000354 decomposition reaction Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 3
- 101100008050 Caenorhabditis elegans cut-6 gene Proteins 0.000 description 2
- 230000006399 behavior Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
- E21F15/04—Stowing mats; Goaf wire netting; Partition walls
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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)
- Remote Sensing (AREA)
- Road Paving Structures (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
A thick coal seam large seam height gob-side retained passageway method, suitable for mine passageway support engineering. The method comprises the following steps: upon mining an upper section coal mining workface (1), constructing, along an edge of a gob (3), a support wall (11) adjacent to a passageway and a pressure buffer wall (13) respectively having therein a ventilation pipe (10); maintaining a space between the two walls at a certain horizontal distance L, thereby forming a gob-side retained passageway; upon mining a lower section coal mining workface (2), providing the gob-side retained passageway in a track passageway (5) of the lower section coal mining workface (2), and at the same time removing a flexible film bag (9) from the surface of the support wall (11) adjacent to a passageway of an upper section gob-side retained passageway located behind the workface; after recovery of the lower section coal mining workface (2) is completed, injecting carbon dioxide into the ventilation pipe (10) within the support wall (11) adjacent to a passageway and the pressure buffer wall (13) of the upper section coal mining workface (1) to promote a carbonization reaction, crumbling and decomposition of the wall, thus realizing mining entirely without the use of coal pillars. The method facilitates complete maintenance of the gob-side retained passageway, realizes a gob-side retained passageway at a large seam height workface of a thick coal layer, notably increases coal recovery ratio, and eliminates stress concentration above and below the walls.
Description
-1-
Description
Thick Coal Seam Large Seam Height Gob-side Retained Passageway Method I Field of the Invention
The present invention relates to the technical field of gob-side retained roadway, in partieular to 5 a thick coal seam large mining height gob-side retained roadway method, whieh is adapted to mine roadway support engineering. II Background of the Invention
Compared with the eonventional coal pillar retained method for roadway protection, the gob-side retained roadway method has apparent teehnieal advantages, such as improving 10 recovery ratio, deereasing roadway drivage ratio, promoting gas eontrol, eliminating stress eoncentration, and improving the working environment at the eoal mining workface, etc. As non-renewable energy resourees decrease rapidly, improving the reeovery ratio of the energy resourees is more and more important. One of the remarkable advantages of the gob-side retained roadway teehnique is that the coal recovery ratio is greatly improved in mining areas 15 and the waste of resourees is reduced by reducing retained eoal pillars. Presently, this technique has been widely applied in thin coal seams and medium-thickness eoal seams.
However, no breakthrough has been made in the gob-side retained roadway technique for mining in thick coal seams. The reason is: a large space is left after the mining of a thick seam large mining height workface is finished, which results in a wide roof caving scope, high 20 displacement amplitude, and severe disturbance; consequently, it is difficult to maintain the roadway along the edge of gob in a stable state during mining, and intensive mine pressure behaviors such as rib fall, roof collapse, or even section closure may occur soon. The core technique of gob-side retained roadway is roadway-side filling, but the wall along the roadway may have movement forms such as longitudinal compression, transverse sliding, or even 25 deflection, etc. under the condition of large mining height; therefore, walls in great dimensions have to be built up to provide a roof supporting function of the filled walls and maintain stability of the filled walls. In such a case, the following four problems exist: (1) the temperature difference between interior and exterior of a large-size filled wall is high, which results in high temperature stress and hence, the filled wall may be damaged early in the 30 hardening process and has poor supporting efficacy; (2) the filling procedure is cumbersome and time-consuming, resulting in impact on the normal coal mining work at the workface; (3) the material consumption is heavy, and a great deal of dust is generated in the material mixing process and causes a deteriorated working environment; (4) the input of equipment, material and manpower is heavy, and the cost is too high. In some mine fields, trials were made to 35 enhance the conventional gob-side retained roadway technique and apply the enhanced gob-side retained roadway technique in thick seam large mining height workface, but most of
9061381_1 (GHMatters) P105952.AU these trials have been ceased owing to the poor effects.
In China, the coal usually exists in an occurrence condition of coal seam groups. Therefore, the mining of a coal seam inevitably brings influences on other coal seams; especially, the concentrated stress above and below retained coal pillars after mining is a safety hazard in the mining space. When the gob-side retained roadway technique is used, the retained roadway-side walls cause stress concentration within a certain range, and bring severe disturbances to safe mining of other adjacent coal seams. 10 15
In summary, the strata pressure behaviors are intensive at thick seam large mining height workface, and it is very difficult to maintain gob-side retained roadway. At present, there is no gob-side retained roadway method that can adapt to such conditions yet, and even more, it is unable to eliminate the problem of stress concentration in roadway-side walls.
Ill Summary of the Invention
Technical problem: to overcome the drawbacks in the prior art, the present invention provides a thick coal seam large mining height gob-side retained roadway method.
Technical scheme: the thick coal seam large mining height gob-side retained roadway method provided in the present invention comprises the following steps: a. Before mining an upper section coal mining workface, excavating a haulage roadway, a track roadway, and an open-off cut for the upper section coal mining workface, and a track roadway and an open-off cut for a lower section coal mining workface, to form an 20 ventilation system for the upper section coal mining workface; b. In the stoping of the upper section coal mining workface, arranging flexible film bags along an edge of a gob following the upper section coal mining workface at the side near the lower section coal mining workface, filling high-water material into the flexible film bags to build up a filled wall with a built-in ventilation pipe as a support wall adjacent to a 25 roadway and thereby form a gob-side retained roadway, at the same time, building up a second filled wall as a pressure buffer wall at the side of the gob of the support wall adjacent to a roadway in the same way, with a spacing distance L between the support wall adjacent to a roadway and the pressure buffer wall which equals to 0.5~0.8 times of the periodic weighting step distance of the main roof; 30 c. Repeating the step b as the upper section coal mining workface advances and an adequate filling space is formed behind it, till the stoping of the upper section coal mining workface is finished; d. Excavating a new track roadway and a new open-off cut for a coal mining workface in the next section in the way used in the step a before mining the lower section coal mining 35 workface , and using the gob-side retained roadway as a haulage roadway for the workface to form an ventilation system for the lower section coal mining workface upon mining the
9061381_1 (GHMatters) P105952.AU lower section coal mining workface, and providing the gob-side retained roadway in the track roadway for the lower section coal mining workface during mining; e. Arranging flexible fdm bags along an edge of the gob and fdling the high-water material into the flexible film bags to build up a new filled wall and form a new gob-side retained 5 roadway in the way used in the step b during the stoping of the lower section coal mining workface, and removing the flexible film bags on the surfaces of the support wall adjacent to a roadway and pressure buffer wall of the upper section behind the workface at the same time; f Pumping carbon dioxide gas into the ventilation pipe in the support wall adjacent to a 10 roadway and pressure buffer wall of the upper section after the stoping of the lower section coal mining workface is finished, so that the filled walls are carbonized, decomposed, and eliminated automatically; g. Repeating the above steps to accomplish the stoping of a new coal mining workface in the next section. 15 The mining height of the upper section coal mining workface and lower section coal mining workface at the side of the gob-side retained roadway is equal to the height of the gob-side retained roadway, and a control range S of the mining height at the side of the gob-side retained roadway is 1.2~2.0 times of the width of the filling body.
The height of the support wall adjacent to a roadway is equal to the height of the roadway, and 20 the width of the support wall adjacent to a roadway is 0.5-1.5 times of the mining height; the height of the pressure buffer wall is equal to the mining height, and the width of the pressure buffer wall is 0.2-1.0 times of the mining height.
The ventilation pipe comprises vent pipes, the front end of the vent pipe is a threaded pipe, the rear end of the vent pipe is a threaded sleeve that can be fitted with the Ifont end, a plurality of 25 vent branch pipes arranged in a crossed manner are mounted on the vent pipe at an interval, and a plurality of vent holes are arranged on the surfaces of the vent pipes and vent branch pipes.
Beneficial effects: with the above-mentioned technical scheme, the method provided in the present invention has the following advantages compared with the prior art: 30 1). By virtue of the supporting function of two filled walls, the gob-side retained roadway at a thick seam large mining height workface is realized, and the gob-side retained roadway technique is enriched and developed. The pressure buffer wall supports the lateral key roof mass of a gob, effeetively decreases the pressure of the roadway roof, and provides a good stress environment for the support wall adjacent to a roadway, so that the support wall 35 adjacent to a roadway is maintained with excellent supporting performance, and the overall stability of the gob-side retained roadway is maintained effectively.
9061381_1 (GHMatters) P105952.AU -4- 2) . The upper section filled walls are kept till the stopoing of the lower section coal mining workface is finished, which is beneficial for the maintenance of the gob-side retained roadway in the entire process. The filled walls are kept from the time that the current coal mining workface is sloped to the time that the sloping of the next coal mining workface is 5 finished, and the roof pressure is relieved fully with the combined action of the two filled walls, so that the gob-side retained roadway is kept stable relatively under several times of mining disturbance. 3) . Gob-side retained roadway at a coal mining workface of a thick coal seam large mining height is realized, and the coal recovery ratio is improved greatly. Coal pillars which have 10 the width of tens of meters are often retained between coal mining workfaces of a thick seam, resulting in severe resource loss. The present invention provides a method for coal pillar-free gob-side retained roadway at coal mining workfaces of a thick seam large mining height, which eliminates retained coal pillars between coal mining workfaces and remarkably improves the coal recovery ratio. 15 4). Stress concentration above and below the filled walls is eliminated by means of carbonization and decomposition of the filled walls. After the stoping at a coal mining workface is finished, carbon dioxide is injected into the ventilation pipe, to prompt quick carbonization and decomposition of the filled walls from the interior and eliminate the filled walls. Stress concentration incurred by retained filled walls is avoided, and adequate 20 pressure relieving from the adjacent upper and lower coal seams is realized under the occurrence condition of coal seam groups, which are beneficial for mining space maintenance, gas extraction and prevention and control of dynamic disasters. IV Brief Description of the Drawings
Fig. 1 is a plan view of a gob-side retained roadway of a thick seam large seam height 25 according to the present invention;
Fig. 2 is a sectional view of the structure along line A-A shown in Fig. 1;
Fig. 3 is a schematic structural diagram of the vent pipe according to the present invention.
Among the figures: 1 - upper section coal mining workface; 2 - lower section coal mining workface; 3 - haulage roadway; 4 - track roadway; 5 - track roadway for lower section coal 30 mining workface; 6 - open-off cut; 7 - open-ofiF cut for lower section coal mining workface; 8 -gob; 8 - flexible film bag; 10 - ventilation pipe; 10-1 - vent pipe; 10-2 - threaded pipe; 10-3 -threaded sleeve; 10-4 - vent branch pipe; 10-5 - vent hole; 11 - support wall adjacent to a roadway; 12 - gob-side retained roadway; 13 - pressure buffer wall; L - horizontal distance; S -control range of mining height at the side of gob-side retained roadway 35 V Detailed Description of the Embodiments
An embodiment of the present invention will be further described in detail with reference to the
9061381_1 (GHMatters) P105952.AU -5- accompanying drawings.
As shown in Fig. 1, in a thick coal seam large mining height gob-side retained roadway method provided in the present invention, upon mining an upper section coal mining workface 1, a track roadway for lower section coal mining workface 5 and an open-off cut for lower section 5 coal mining workface 7 for a lower section coal mining workface 2 are excavated, and the track roadway for a lower section coal mining face 5 and an open-off cut for a lower section coal mining face 7, together with a haulage roadway 3, a track roadway 4 and an open-off cut 6 for the upper section coal mining workface 1, form a ventilation system for the upper section coal mining workface 1; upon mining the upper section coal mining face 1, a support wall adjacent 10 to a roadway 11 and a pressure buffer wall 13, each of which is provided with a built-in ventilation pipe 10, are built up along an edge of a gob 8, and the two walls are spaced from each other by a horizontal distance L, so as to form a gob-side retained roadway 12; upon mining the lower section coal mining workface 2, the gob-side retained roadway 12 becomes a haulage roadway for this workface; during the mining, a gob-side remained roadway is 15 provided in the track roadway 5 of the lower section coal mining workface, and at the same time the flexible fdm bags are removed from the surfaces of the support wall adjacent to a roadway 11 and pressure buffer wall 13 of the upper section gob-side retained roadway 12 behind the workface; when the stoping of the lower section coal mining workface is finished, carbon dioxide is injected into the ventilation pipe 10 within the support wall adjacent to a 20 roadway 11 and pressure buffer wall 13 of the upper section coal mining workface 1, to promote a carbonization reaction, crumbling and decomposition of the wall, thus, realizing mining without the coal pillars. New sections of coal mining workfaces can be mined in the same way. Specifically, the steps are as follows: a. Before mining an upper section coal mining workface 1, excavating a haulage roadway 3, 25 a track roadway 4, and an open-off cut 6 for the upper section coal mining workface 1, and a track roadway for a lower section coal mining workface 5 and an open-off cut for a lower section coal mining workface 7 for a lower section coal mining workface 2, to form an ventilation system for the upper section coal mining workface; b. In the stoping of the upper section coal mining workface 1, arranging flexible film bags 9 30 along an edge of a gob 8 following the upper section coal mining workface 1 at the side
near the lower section coal mining workface 2, filling high-water material into the flexible film bags 9 to build up a filled wall with a built-in ventilation pipe 10 as a support wall adjacent to a roadway 11 and thereby form a gob-side retained roadway 12, at the same time, building up a second filled wall as a pressure buffer wall 13 at the side of the gob of 35 the support wall adjacent to a roadway 11 in the same way, with a spacing distance L between the support wall adjacent to a roadway 11 and the pressure buffer wall 13 which equals to 0.5-0.8 times of the periodic weighting step distance of the main roof, as shown in fig. 2; c. Repeating the step b as the upper section coal mining workface 1 advances and an
9061381_1 (GHMatters) P105952.AU adequate filling spaee is formed behind it, till the stoping of the upper section coal mining workface 1 is finished; d. Excavating a new track roadway and a new open-off cut for a coal mining workface in the next section in the way used in the step a before mining the lower section coal mining 5 workface 2, and using the gob-side retained roadway 12 as a haulage roadway for the workface to form an ventilation system for the lower section coal mining workface 2 upon minting the lower section coal mining workface 2, and providing a gob-side retained roadway in the track roadway for the lower section coal mining workface 5 for the lower section coal mining workface 2 during mining; 10 e. Arranging flexible film bags along an edge of the gob and filling the high-water material into the flexible film bags to build up a new filled wall and form a new gob-side retained roadway in the way used in the step b in the stoping of the lower section coal mining workface 2, and removing the flexible film bags 9 on the surfaces of the support wall adjacent to a roadway 11 and pressure buffer wall 13 of the upper section behind the 15 workface at the same time; f Pumping carbon dioxide gas into the ventilation pipe 10 in the supporting wall adjacent to a roadway 11 and pressure buffer wall 13 of the upper section after the stoping of the lower section coal mining workface 2 is finished, so that the filled walls are carbonized, decomposed, and eliminated automatically; 20 g. Repeating the above steps to accomplish the stoping of a new coal mining workface in the next section.
The mining height of the upper section coal mining workface 1 and lower section coal mining workface 2 at the side of the gob-side retained roadway is equal to the height of the gob-side retained roadway, and a control range S of the mining height at the side of the gob-side retained 25 roadway is 1.2-2.0 times of the width of the filling body.
The height of the support wall adjacent to a roadway is equal to the height of the roadway, and the width of the support wall adjacent to a roadway is 0.5-1.5 times of the mining height; the height of the pressure buffer wall 13 is equal to the mining height, and the width of the pressure buffer wall is 0.2-1.0 times of the mining height. 30 The ventilation pipe 10 comprises vent pipes 10-1, the front end of the vent pipe 10-1 is a threaded pipe 10-2, the rear end of the vent pipe 10-1 is a threaded sleeve 10-3 that can be fitted with the front end, a plurality of vent branch pipes 10-4 arranged in a crossed manner are mounted on the vent pipe 10-1 at an interval, and a plurality of vent holes 10-5 are arranged on the surfaces of the vent pipes 10-1 and vent branch pipes 10-4. 35
9061381_1 (GHMatters) P105952.AU
Claims (4)
1. A thick coal seam large mining height gob-side retained roadway method, comprising the following steps: a. Before mining an upper section coal mining workface (1), excavating a haulage roadway (3), a track roadway (4), and an open-off cut (6) for the upper section coal mining workface (1), and a track roadway for a lower section coal mining workface (5) and an open-off cut for a lower section coal mining workface (7) for a lower section coal mining workface (2), to form an ventilation system for the upper section coal mining workface; b. In the stoping of the upper section coal mining workface (1), arranging flexible film bags (9) along an edge of a gob (8) following the upper section coal mining workface (1) at the side near the lower section coal mining workface (2), filling high-water material into the flexible film bags (9) to build up a filled wall with a built-in ventilation pipe (10) as a supporting wall adjacent to a roadway (11) and thereby form a gob-side retained roadway (12), at the same time, building up a second filled wall as a pressure buffer wall (13) at the side of the gob of the support wall adjacent to a roadway (11) in the same way, with a spacing distance L between the support wall adjacent to a roadway (11) and the pressure buffer wall (13) which equals to 0.5~0.8 times of the periodic weighting step distance of the main roof; c. Repeating the step b as the upper section coal mining workface (1) advances and an adequate filling space is formed behind it, till the stoping of the upper section coal mining workface (1) is finished; d. Excavating a new track roadway and a new open-off cut for a coal mining workface in the next section in the way used in the step a before mining the lower section coal mining workface (2), and using the gob-side retained roadway (12) as a haulage roadway for the workface to form an ventilation system for the lower section coal mining workface (2) upon mining the lower section coal mining face (2), and providing a gob-side retained roadway in the track roadway for the lower section coal mining workface (5) for the lower section coal mining workface (2) during mining; e. Arranging flexible film bags along an edge of the gob and filling the high-water material into the flexible film bags to build up a new filled wall and form a new gob-side retained roadway in the way used in the step b in the stoping of the lower section coal mining workface (2), and removing the flexible film bags (9) on the surfaces of the supporting wall adjacent to a roadway (11) and pressure buffer wall (13) of the upper section behind the workface at the same time; f. Pumping carbon dioxide gas into the ventilation pipe (10) in the support wall adjacent to a roadway (11) and pressure buffer wall (13) of the upper section after the stoping of the lower section coal mining workface (2) is finished, so that the filled walls are carbonized, decomposed, and eliminated automatically; g. Repeating the above steps to accomplish stoping of a new coal mining workface in the next section.
2. The thick coal seam large mining height gob-side retained roadway method according to claim 1, wherein, the mining height of the upper section coal mining workface (1) and lower section coal mining workface (2) at the side of the gob-side retained roadway is equal to the height of the gob-side retained roadway, and a control range S of the mining height at the side of the gob-side retained roadway is 1.2-2.0 times of the width of the filling body.
3. The thick coal seam large mining height gob-side retained roadway method according to claim 1, wherein, the height of the support wall adjacent to a roadway is equal to the height of the roadway, and the width of the support wall adjacent to a roadway is 0.5-1.5 times of the mining height; the height of the pressure buffer wall (13) is equal to the mining height, and the width of the pressure buffer wall is 0.2-1.0 times of the mining height.
4. The thick coal seam large mining height gob-side retained roadway method according to claim 1, wherein, the ventilation pipe (10) comprises vent pipes (10-1), the front end of the vent pipe (10-1) is a threaded pipe (10-2), the rear end of the vent pipe (10-1) is a threaded sleeve (10-3) that can be fitted with the front end, a plurality of vent branch pipes (10-4) arranged in a crossed manner are mounted on the vent pipe (10-1) at an interval, and a plurality of vent holes (10-5) are arranged on the surfaces of the vent pipes (10-1) and vent branch pipes (10-4).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510018346.9 | 2015-01-14 | ||
| CN201510018346.9A CN104632219B (en) | 2015-01-14 | 2015-01-14 | The high gob-side entry retaining method of thick seam large mining |
| PCT/CN2015/098029 WO2016112772A1 (en) | 2015-01-14 | 2015-12-21 | Thick coal seam large seam height gob-side retained passageway method |
Publications (2)
| Publication Number | Publication Date |
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| AU2015377025A1 true AU2015377025A1 (en) | 2017-06-15 |
| AU2015377025B2 AU2015377025B2 (en) | 2018-03-22 |
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| AU2015377025A Ceased AU2015377025B2 (en) | 2015-01-14 | 2015-12-21 | Thick coal seam large seam height gob-side retained passageway method |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN104632219B (en) |
| AU (1) | AU2015377025B2 (en) |
| WO (1) | WO2016112772A1 (en) |
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| CN104632219B (en) * | 2015-01-14 | 2017-03-29 | 中国矿业大学 | The high gob-side entry retaining method of thick seam large mining |
| CN104727847B (en) * | 2015-01-14 | 2016-11-02 | 中国矿业大学 | Filled wall is from the gob-side entry retaining method without coal column eliminated |
| CN106528965B (en) * | 2016-10-21 | 2019-06-14 | 重庆大学 | The acquisition methods of the face end factor of stress concentration |
| CN107083959A (en) * | 2017-06-02 | 2017-08-22 | 天地科技股份有限公司 | A kind of gob-side entry retaining method |
| CN107701188B (en) * | 2017-10-25 | 2019-02-26 | 太原理工大学 | One kind cutting top destressing method for the mined out side static state spalling of gob side entry driving thin coal pillar |
| CN109209428A (en) * | 2018-08-13 | 2019-01-15 | 中煤能源研究院有限责任公司 | The roadway workface arragement construction of pillar extraction between a kind of achievable lane |
| CN109057794A (en) * | 2018-08-13 | 2018-12-21 | 中煤能源研究院有限责任公司 | A kind of big coal-mining method of the coal column driving without coal pillar mining |
| CN110242322B (en) * | 2019-07-02 | 2020-08-28 | 中国矿业大学(北京) | Roadway arrangement method for gob-side entry retaining of extra-thick coal seam |
| CN110905507A (en) * | 2019-12-06 | 2020-03-24 | 河南力行科创矿山技术开发有限公司 | Advanced roof cutting pressure relief gob-side entry retaining process for high-gas large-mining-height high-efficiency mining working face |
| CN111027219B (en) * | 2019-12-12 | 2023-07-25 | 神华准格尔能源有限责任公司 | Height determining method for public transportation side of adjacent co-directional collaborative mining open coal mine |
| CN113530543B (en) * | 2021-06-04 | 2022-07-26 | 华能煤炭技术研究有限公司 | Entry gate crossheading roof cutting height design method and entry gate crossheading maintenance method |
| CN115263308B (en) * | 2022-08-30 | 2023-08-08 | 乌海市天誉煤炭有限责任公司 | Blasting roof-cutting gob-side entry retaining method |
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| CN102383857A (en) * | 2011-07-05 | 2012-03-21 | 徐州贝壳迈宁矿业科技有限公司 | Gob-side entry retaining process for solid-filling, coal-mining and laying gangue wall |
| CN102425454B (en) * | 2011-09-22 | 2013-10-30 | 中国矿业大学 | Construction method of walling and filling combined gob-side entry retaining wall body |
| CN203067026U (en) * | 2013-01-16 | 2013-07-17 | 中国矿业大学 | Gob-side entry retaining filling wall body structure of hollow built-in reinforced rib |
| CN103089298B (en) * | 2013-01-23 | 2014-11-19 | 中国矿业大学 | Structure and method for building side direction multicolumn gob-side entry retaining filling wall body |
| CN103742148B (en) * | 2014-01-14 | 2016-08-17 | 山东科技大学 | The soft coal-mining method covering the descending waste filling of supporting of a kind of half-edge coal seam |
| CN103883336B (en) * | 2014-04-11 | 2016-03-16 | 山东科技大学 | A kind of adjustable gob side entry retaining body of wall of first initiatively relief pressure supporting and construction method thereof |
| CN104074534B (en) * | 2014-06-27 | 2016-08-24 | 辽宁工程技术大学 | A kind of combining adopts/the gob-side entry retaining method of fully mechanized coal face |
| CN104632219B (en) * | 2015-01-14 | 2017-03-29 | 中国矿业大学 | The high gob-side entry retaining method of thick seam large mining |
-
2015
- 2015-01-14 CN CN201510018346.9A patent/CN104632219B/en active Active
- 2015-12-21 AU AU2015377025A patent/AU2015377025B2/en not_active Ceased
- 2015-12-21 WO PCT/CN2015/098029 patent/WO2016112772A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016112772A1 (en) | 2016-07-21 |
| CN104632219B (en) | 2017-03-29 |
| AU2015377025B2 (en) | 2018-03-22 |
| CN104632219A (en) | 2015-05-20 |
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