CN114687794A - Coal mine filling and re-mining method - Google Patents
Coal mine filling and re-mining method Download PDFInfo
- Publication number
- CN114687794A CN114687794A CN202210334378.XA CN202210334378A CN114687794A CN 114687794 A CN114687794 A CN 114687794A CN 202210334378 A CN202210334378 A CN 202210334378A CN 114687794 A CN114687794 A CN 114687794A
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- filling
- roadway
- main
- mining
- goaf
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- 238000005065 mining Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000003245 coal Substances 0.000 title claims abstract description 30
- 238000013459 approach Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000009423 ventilation Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- 239000010878 waste rock Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- 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
-
- 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
- E21F15/06—Filling-up mechanically
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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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)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention provides a coal mine filling and re-mining method, which comprises the following steps of firstly, carrying out safety treatment measures such as ventilation, drainage, support and the like on a roadway and a mined-out area left by a shallow part of a mine; secondly, performing cemented filling treatment on the 'old goaf' by using a filling material; secondly, after the filling body is solidified and is cemented with the coal bodies around the dead zone to form an integral structure, the structure is re-divided into mining areas as new ore bodies, and new transportation roadways, air return roadways and working surfaces are arranged; and finally, selecting a proper mining method according to the specific coal seam conditions of the mine for re-mining. The method can effectively solve the safety problem caused by the remained goaf to the re-mining operation, and furthest reduce the influence of the 'old goaf' on the re-mining operation, so that the re-mining working face is safer and more efficient; the newly divided mining area is more suitable for the existing stoping technology and equipment, the mining efficiency and the recovery rate of coal resources are improved, and a new idea is provided for large-scale re-mining of shallow left coal resources.
Description
Technical Field
The invention relates to the technical field of coal mine filling mining, in particular to a coal mine filling and re-mining method.
Background
In China, in inner Mongolia, Shanxi, Shaanxi and other areas, a plurality of goafs and large-scale shallow residual coal resources left over due to early small-scale mining of small-sized coal mines exist. The main problems existing in the current mines comprise: due to the low level of the traditional stoping mechanization and the disorder and disorder in the aspects of mining design, mining succession, roadway arrangement and the like, the left goaf is disordered and different in size, and the arrangement of a re-mining working face is seriously influenced; meanwhile, the sealing time of the left dead zone is long, so that the problems of gas accumulation, water accumulation, difficult control of a top plate and the like exist in the left dead zone to different degrees, and the safety production of a mine is seriously threatened; and because the early-stage overall resource recovery rate is lower and is only about 10% -30%, large-area coal pillar resources with high quality are left, so that the filling of the goaf left-over coal bodies in the re-mining shallow part can not only recover high-quality coal resources and improve economic benefits, but also effectively solve the potential safety hazard caused by large-scale mining in the later stage due to the left-over goaf.
Disclosure of Invention
The embodiment of the invention provides a coal mine filling and re-mining method, which is used for solving the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme.
A coal mine filling and re-mining method comprises the following steps:
s1, ventilating and draining the abandoned roadway and the gob respectively, and then performing support treatment on the abandoned roadway;
s2, laying a filling main pipe in the main roadway of the abandoned roadway after the step S1 is performed, installing a filling branch pipe in the approach of the gob, and installing filling retaining walls in the inlet areas of the approach of the main roadway and the gob, respectively;
s3, sequentially filling the main roadway and the goaf by a backward filling method;
and S4, after the filling areas of the main roadway and the goaf in the step S3 are completely consolidated, carrying out stoping operation on the remained roadway and the goaf.
Preferably, step S3 specifically includes:
s31 performing a filling work on a side within the main lane of the carry-over lane on which the step S1 is performed, the filling work area including the side of the main lane, or the side of the main lane and an adjacent gob;
s32, moving the filling main pipe towards the inlet area of the main roadway, and filling the main roadway area where the filling main pipe is located, or the main roadway area and the adjacent goaf;
s33 repeats the substep S32 a plurality of times until the filling of the legacy roadway and the gob is completed.
Preferably, the distance of moving the filling main pipe satisfies the filling step pitch each time the sub-step S32 is performed.
Preferably, the filling manifold is a hose.
According to the technical scheme provided by the embodiment of the invention, the embodiment of the invention is shown.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced 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 based on these drawings without creative efforts.
FIG. 1 is a processing flow chart of a coal mine filling and re-mining method provided by the invention;
fig. 2 is a schematic diagram of a left-over roadway and a goaf in a coal mine filling and stoping method provided by the invention;
fig. 3 is a schematic view of an overall plane structure of a roadway to be left and a gob to be left in a coal mine filling and re-mining method provided by the invention after being completely filled;
fig. 4 is a schematic structural plan view of a working face, a transportation roadway and a return air roadway for arranging newly divided ore blocks in the coal mine filling and re-mining method provided by the invention;
fig. 5 is a schematic structural diagram of a stoping operation plane in the coal mine filling stoping method provided by the invention.
In the figure:
1a, a main roadway; 1b, collecting the goaf; 2. filling the retaining wall; 3. the filled retaining wall is removed; 4. the filling pipe is removed; 5. cementing a filling body; 6. a filling valve; 7a, filling a main pipe; filling branch pipes; 8. leaving coal bodies behind; 9. stoping the working face; 10. a haulage roadway; 11. an air return roadway; 12. and (4) new goaf.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or coupled. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking several specific embodiments as examples in conjunction with the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.
Referring to fig. 1, the coal mine filling and re-mining method provided by the invention comprises the following processes:
s1, ventilating and draining the left roadway and the goaf 1b respectively, and then performing support treatment on the left roadway;
s2 laying a filling main pipe 7a in the main tunnel 1a of the carry-over tunnel in which the step S1 is performed, providing a filling branch pipe 7b in the approach of the gob 1b, and providing a filling retaining wall 2 in the inlet areas of the approaches of the main tunnel 1a and the gob 1b, respectively;
s3 sequentially filling the main lane 1a and the gob 1b by a retreat filling method;
s4, after the filling areas of the main roadway 1a and the gob 1b of the step S3 are all consolidated, a stoping operation is performed on the remained roadway and the gob 1b.
As shown in fig. 2 to 5, the method provided by the present invention firstly performs safety measures such as ventilation, drainage, support and the like on the roadway and the irregular mined-out area 1b (both referred to as "old mined-out area") left by the shallow part of the mine; secondly, the filling material is used for treating the left roadway and the irregular mined-out area by a retreat type cemented filling method; secondly, after the filling body is solidified and is cemented with the coal bodies around the dead zone to form an integral structure, the structure is re-divided into mining areas as new ore bodies, and new transportation roadways, air return roadways and working surfaces are arranged; and selecting a proper mining method according to the specific coal seam condition of the mine to carry out large-scale re-mining.
Specifically, in some preferred embodiments, the method comprises the following steps:
1) ventilating and draining the left roadway and the goaf 1b, and then performing support treatment on the left roadway;
2) laying a filling main pipe 7a in the supported remained main roadway 1a, arranging filling branch pipes 7b on the approach of each remained goaf, adopting hoses for the filling branch pipes, and arranging filling retaining walls 2 at the main roadway and the entrance of the approach;
3) filling slurry is prepared by filling materials such as coal gangue, fly ash and cement in a surface pulping station, then the filling slurry is conveyed to the underground in a pipeline conveying mode, and the left main roadway 1a and each left goaf 1b are sequentially filled by a retreating type filling method; removing the corresponding filling retaining wall 3, the filling main pipe 7a and the filling branch pipe 7b in sequence according to the filling progress in the filling process; (the removed filling wall 3 is indicated on the right in FIG. 2)
4) Filling from one end of the left main roadway 1a according to the designed filling step pitch, solidifying the slurry to be filled and enabling the filling body to be connected with the top;
5) withdrawing the filling main pipe 7a, filling each remained goaf in sequence, solidifying the filling slurry and filling the space of the original filling main pipe 7a with a filling body to form a final cemented filling body 5 (as shown in fig. 3);
6) cycle 4) or 5) until the final complete filling is completed;
7) and after the left roadway and the goaf are completely filled and consolidated, newly performing mining design, tunneling a haulage roadway 10, an air return roadway 11 and cutting holes, reasonably arranging a working face, and selecting a proper mining method (such as a fully mechanized mining method) to perform stoping (such as fig. 4 and 5, wherein arrows indicate the moving direction of mining operation).
Wherein the filling main pipe 7a refers to a main line filling pipe arranged in a main roadway of the legacy roadway. The filling branch pipe 7b means a branch pipe extending from the filling main pipe to each of the gob-to-be-mined areas. The backward filling refers to a process of sequentially filling from the end position (which can be set according to actual conditions) of the main roadway access way of the left roadway to the roadway inlet direction according to corresponding filling steps when the roadway is filled. The filling step pitch refers to the distance of filling the goaf once in the advancing direction of the working face. The term "close-packed" refers to a state in which a packing material is packed into a top plate or a false roof of an ore or rock. The filling retaining wall is used for effectively sealing slurry in the closed goaf and is an important guarantee for ensuring that the filling slurry realizes a preset function in the goaf. At present, domestic and foreign mines mainly adopt the following filling retaining wall structures: concrete retaining walls, brick retaining walls, wooden retaining walls, sand bag retaining walls, waste rock retaining walls, and the like.
Those of ordinary skill in the art will understand that: the figures are merely schematic representations of one embodiment, and the blocks or flow diagrams in the figures are not necessarily required to practice the present invention.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, they are described in relative terms, as long as they are described in partial descriptions of method embodiments. The above-described embodiments of the apparatus and system are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A coal mine filling and re-mining method is characterized by comprising the following steps:
s1, ventilating and draining the left roadway and the goaf respectively, and then performing support treatment on the left roadway;
s2 laying a main filling pipe in the main roadway of the gob having performed the step S1, providing a branch filling pipe in the approach of the gob, and providing retaining walls in the inlet areas of the main roadway and the approach of the gob, respectively;
s3, sequentially filling the main roadway and the goaf by a backward filling method;
and S4, after the filling areas of the main roadway and the goaf are completely consolidated in the step S3, carrying out stoping operation on the remained roadway and the goaf.
2. The coal mine filling and stoping method according to claim 1, wherein the step S3 specifically comprises:
s31 performing a filling work on a side within the main lane of the carry-over lane on which the step S1 is performed, the filling work area including the side of the main lane, or the side of the main lane and an adjacent gob;
s32 moving the main filling pipe in the direction of the entrance area of the main roadway, and filling the main roadway area where the main filling pipe is located, or the main roadway area and the adjacent gob;
s33 repeats the substep S32 a plurality of times until the filling of the legacy roadway and the gob is completed.
3. The coal mine filling and stoping method according to claim 1, wherein the distance of moving the filling main pipe satisfies the filling step pitch each time substep S32 is performed.
4. The coal mine filling and stoping method according to claim 1, wherein the filling branch pipe is a hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210334378.XA CN114687794B (en) | 2022-03-31 | 2022-03-31 | Coal mine filling and repeated mining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210334378.XA CN114687794B (en) | 2022-03-31 | 2022-03-31 | Coal mine filling and repeated mining method |
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| Publication Number | Publication Date |
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| CN114687794A true CN114687794A (en) | 2022-07-01 |
| CN114687794B CN114687794B (en) | 2023-11-17 |
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| CN202210334378.XA Active CN114687794B (en) | 2022-03-31 | 2022-03-31 | Coal mine filling and repeated mining method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967493A (en) * | 2014-05-23 | 2014-08-06 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Pillar mining method for gentle dip thin ores |
| CN107313778A (en) * | 2017-08-11 | 2017-11-03 | 太原理工大学 | A kind of second mining super high seam stops the method for adopting line coal column |
| CN108087021A (en) * | 2017-11-01 | 2018-05-29 | 中国矿业大学 | A kind of method that filling coal mining recycling leaves coal column and water-resisting key strata is controlled to stablize |
| CN108915764A (en) * | 2018-07-09 | 2018-11-30 | 中国矿业大学 | A kind of method of reserved tunnel consolidated fill recycling room formula coal column |
| CN110030031A (en) * | 2019-02-26 | 2019-07-19 | 天地科技股份有限公司 | The method that coal column is left in a kind of longwell recycling house column type goaf |
| CN110410076A (en) * | 2019-08-16 | 2019-11-05 | 山东科技大学 | A kind of filling mining method for leaving Pillar Recovery for old pillars of a house goaf |
| CN110714759A (en) * | 2019-10-14 | 2020-01-21 | 山西鸿太旭飞能源科技有限公司 | Method for mining lost coal |
| CN112593940A (en) * | 2020-12-16 | 2021-04-02 | 中煤能源研究院有限责任公司 | Arrangement process for remaining coal pillars and processing ground gangue by stope-type coal mining method |
-
2022
- 2022-03-31 CN CN202210334378.XA patent/CN114687794B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967493A (en) * | 2014-05-23 | 2014-08-06 | 山东黄金矿业(莱州)有限公司三山岛金矿 | Pillar mining method for gentle dip thin ores |
| CN107313778A (en) * | 2017-08-11 | 2017-11-03 | 太原理工大学 | A kind of second mining super high seam stops the method for adopting line coal column |
| CN108087021A (en) * | 2017-11-01 | 2018-05-29 | 中国矿业大学 | A kind of method that filling coal mining recycling leaves coal column and water-resisting key strata is controlled to stablize |
| CN108915764A (en) * | 2018-07-09 | 2018-11-30 | 中国矿业大学 | A kind of method of reserved tunnel consolidated fill recycling room formula coal column |
| CN110030031A (en) * | 2019-02-26 | 2019-07-19 | 天地科技股份有限公司 | The method that coal column is left in a kind of longwell recycling house column type goaf |
| CN110410076A (en) * | 2019-08-16 | 2019-11-05 | 山东科技大学 | A kind of filling mining method for leaving Pillar Recovery for old pillars of a house goaf |
| CN110714759A (en) * | 2019-10-14 | 2020-01-21 | 山西鸿太旭飞能源科技有限公司 | Method for mining lost coal |
| CN112593940A (en) * | 2020-12-16 | 2021-04-02 | 中煤能源研究院有限责任公司 | Arrangement process for remaining coal pillars and processing ground gangue by stope-type coal mining method |
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| CN114687794B (en) | 2023-11-17 |
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