CN113638769A - Goaf filling method - Google Patents
Goaf filling method Download PDFInfo
- Publication number
- CN113638769A CN113638769A CN202110994681.8A CN202110994681A CN113638769A CN 113638769 A CN113638769 A CN 113638769A CN 202110994681 A CN202110994681 A CN 202110994681A CN 113638769 A CN113638769 A CN 113638769A
- Authority
- CN
- China
- Prior art keywords
- filling
- sub
- bands
- isolation
- infill
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 67
- 239000000463 material Substances 0.000 claims abstract description 181
- 238000002955 isolation Methods 0.000 claims abstract description 111
- 238000005187 foaming Methods 0.000 claims abstract description 40
- 239000003245 coal Substances 0.000 claims description 38
- 239000000945 filler Substances 0.000 claims description 37
- 238000005192 partition Methods 0.000 claims description 22
- 239000007787 solid Substances 0.000 claims description 19
- 239000006261 foam material Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000010879 coal refuse Substances 0.000 claims description 14
- 229920000642 polymer Polymers 0.000 claims description 14
- 125000006850 spacer group Chemical group 0.000 claims description 12
- 239000004568 cement Substances 0.000 claims description 11
- 239000004088 foaming agent Substances 0.000 claims description 11
- 239000002699 waste material Substances 0.000 claims description 9
- 238000010276 construction Methods 0.000 claims description 8
- 239000010881 fly ash Substances 0.000 claims description 8
- 238000012856 packing Methods 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 7
- 229920001971 elastomer Polymers 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 6
- 239000005060 rubber Substances 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 4
- 239000002023 wood Substances 0.000 claims description 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 3
- 229920000459 Nitrile rubber Polymers 0.000 claims description 3
- 229920002396 Polyurea Polymers 0.000 claims description 3
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 3
- 229920001568 phenolic resin Polymers 0.000 claims description 3
- 239000005011 phenolic resin Substances 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229920000098 polyolefin Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 238000005065 mining Methods 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 239000004604 Blowing Agent Substances 0.000 description 6
- 239000006260 foam Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 239000002666 chemical blowing agent Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000011381 foam concrete Substances 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 229910010272 inorganic material Inorganic materials 0.000 description 3
- 239000011147 inorganic material Substances 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000012229 microporous material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- DDMOUSALMHHKOS-UHFFFAOYSA-N 1,2-dichloro-1,1,2,2-tetrafluoroethane Chemical compound FC(F)(Cl)C(F)(F)Cl DDMOUSALMHHKOS-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000004338 Dichlorodifluoromethane Substances 0.000 description 1
- 108010082495 Dietary Plant Proteins Proteins 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 150000001924 cycloalkanes Chemical class 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 1
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- 229940042935 dichlorodifluoromethane Drugs 0.000 description 1
- 229940087091 dichlorotetrafluoroethane Drugs 0.000 description 1
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 description 1
- -1 e.g. Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920005615 natural polymer Polymers 0.000 description 1
- 150000002832 nitroso derivatives Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- ODGAOXROABLFNM-UHFFFAOYSA-N polynoxylin Chemical compound O=C.NC(N)=O ODGAOXROABLFNM-UHFFFAOYSA-N 0.000 description 1
- 229940051841 polyoxyethylene ether Drugs 0.000 description 1
- 229920000056 polyoxyethylene ether Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- CYRMSUTZVYGINF-UHFFFAOYSA-N trichlorofluoromethane Chemical compound FC(Cl)(Cl)Cl CYRMSUTZVYGINF-UHFFFAOYSA-N 0.000 description 1
- 229940029284 trichlorofluoromethane Drugs 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
-
- 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
Landscapes
- 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
Disclosed is a goaf filling method, including: dividing the goaf into a first group of filled regions, a second group of filled regions, and an isolation region located between and separating the first group of filled regions from the second group of filled regions; filling the first set of filling zones with a first filling material; filling the isolation region with a foaming material to form an isolation layer; filling the second filling region with a second filling material.
Description
Technical Field
At least one embodiment of the present disclosure relates to a goaf filling method.
Background
In the coal mine operation process, cavities or cavities left after underground coal or coal gangue and the like are mined are called as 'goafs'. A large amount of goaf is often formed in the coal mining process. In order to prevent the ground surface from sinking, eliminate the hidden trouble of production and ensure the operation safety, the goaf needs to be timely and planned to be treated, such as reinforcement or filling. Common filling methods include a gangue filling method, a tailing filling method, a paste filling method and the like. For example, mine spoil filling involves the use of large amounts of coal gangue, which are typically associated with mining processes, for goaf filling.
Coal mine filling usually adopts a full mining and full filling mode, but the mode needs a large amount of filling materials. Generally, the volume of gangue produced in mining is often far smaller than the space volume of a goaf, so a large amount of other filling materials such as river sand, crushed stone and the like need to be supplemented to meet the filling requirement of the goaf, and the filling cost is greatly increased. And because the granularity of the solid needed in the filling process has the specified requirement, the coal gangue crushing also needs to consume larger cost.
Disclosure of Invention
At least one embodiment of the present disclosure provides a goaf filling method, including: dividing the goaf into a first group of filled regions, a second group of filled regions, and an isolation region located between and separating the first group of filled regions from the second group of filled regions; filling the first set of filling zones with a first filling material; filling the isolation region with a foaming material to form an isolation layer; filling the second filling region with a second filling material.
In some examples of the goaf-filling method of at least one embodiment of the present disclosure, the first group of fill zones includes a plurality of first fill subsections; said second set of packing areas comprises a plurality of second packing sub-areas; the isolation region comprises a plurality of isolation partitions; the plurality of first infill sections alternate with the plurality of second infill sections, and adjacent first infill sections are separated from the second infill sections by the spacer section.
In some examples of the goaf-filling method of at least one embodiment of the present disclosure, the first fill material in the plurality of first-fill subsections of the first set of fill zones forms a first set of fill bands, the first set of fill bands including a plurality of first fill subsections corresponding to the plurality of first-fill subsections; the second filler material in the second plurality of infill sections of the second set of infill sections forming a second set of infill strips, the second set of infill strips including a plurality of second infill strips corresponding to the second plurality of infill sections; the foamed material in the plurality of isolation zones of the isolation zone forms an isolation zone comprising a plurality of isolation sub-zones corresponding to the plurality of isolation zones, wherein the plurality of first filled sub-zones are alternately arranged with the plurality of second filled sub-zones, and adjacent first filled sub-zones are separated from adjacent second filled sub-zones by the isolation sub-zones.
In some examples of the gob filling method of at least one embodiment of the present disclosure, the plurality of first filling sub-zones, the plurality of second filling sub-zones, and the plurality of isolation sub-zones are perpendicular to a horizontal plane.
In some examples of the gob filling method of at least one embodiment of the present disclosure, the plurality of first filling sub-zones, the plurality of second filling sub-zones, and the plurality of isolation sub-zones are parallel to a horizontal plane.
In some examples of the goaf-filling method of at least one embodiment of the present disclosure, wherein the plurality of first-fill sub-zones, the plurality of second-fill sub-zones, and the plurality of isolation sub-zones are perpendicular to a horizontal plane, prior to filling one or more of the plurality of first-fill sub-zones with the first filling material and prior to filling one or more of the plurality of second-fill sub-zones with the second filling material, filling one or more of the plurality of isolation sub-zones with the foamed material to form the isolation sub-zones; or filling one or more of the plurality of isolation sub-bands with the foamed material to form the isolation sub-band after filling one or more of the plurality of first filling sub-bands with the first filling material and before filling one or more of the plurality of second filling sub-bands with the second filling material.
In still other examples of the goaf-filling method of at least one embodiment of the present disclosure, wherein the plurality of first-fill sub-zones, the plurality of second-fill sub-zones, and the plurality of isolation sub-zones are parallel to a horizontal plane, filling one or more of the plurality of isolation sub-zones with the foamed material to form the isolation sub-zones after filling one or more of the plurality of first-fill sub-zones with the first filling material and before filling one or more of the plurality of second-fill sub-zones with the second filling material.
In some examples of the goaf-filling method of at least one embodiment of the present disclosure, each of the plurality of first-fill subbands has a width of 5-10 meters; each of the plurality of second filled sub-bands has a width of 5-10 meters; each of the plurality of isolated sub-bands has a width of 0.1-2 meters.
In some examples of the gob filling method of at least one embodiment of the present disclosure, a width ratio of each of the plurality of first-filling subbands, each of the plurality of second-filling subbands, and each of the plurality of isolation subbands is 5-10:5-10: 1.
In some examples of the goaf-filling method of at least one embodiment of the present disclosure, the foam material is one or more of an organic foam material and an inorganic foam material.
In some examples of the goaf-filling method of at least one embodiment of the present disclosure, the organic foam includes one or more polymeric foams; the polymer foam material comprises a resin, a foaming agent, a filler, a stabilizer and water.
In some examples of the goaf-filling method of at least one embodiment of the present disclosure, the resin is one or more of polyester, polyurethane, polyurea, polyolefin, phenolic resin, urea-formaldehyde resin, epoxy resin, nitrile rubber.
In some examples of the gob filling method of at least one embodiment of the present disclosure, the inorganic foaming material includes a filler, a binder, a foaming agent, and water.
In some examples of the goaf-filling method of at least one embodiment of the present disclosure, the cementitious material is cement or rubber powder.
In some examples of the gob filling method of at least one embodiment of the present disclosure, the first filler material is a solid filler material and the second filler material is a paste filler material.
In some examples of the goaf-filling method of at least one embodiment of the present disclosure, the solid-fill material includes one or more of gangue, ore, wood, construction waste.
In some examples of the gob filling method of at least one embodiment of the present disclosure, the paste filling material includes a filler, a cement, and water.
In some examples of the gob filling method of at least one embodiment of the present disclosure, the paste filling material includes a filler, a cementing material, and water, the filler including one or more of crushed coal gangue, crushed construction waste, fly ash, slag, and poor quality soil.
In some examples of the goaf-filling method of at least one embodiment of the present disclosure, the method further comprises: sieving coal gangue, and using the coal gangue with the size of more than or equal to 300mm as the solid filling material; crushing the coal gangue with the size of less than 300mm to the size of less than or equal to 30 mm; and preparing the paste filling material by using the crushed coal gangue as a filler.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.
Fig. 1 is a flow chart of a filling method according to an embodiment of the disclosure;
FIG. 2 is a schematic view of a gob being filled according to a filling method provided in an embodiment of the present disclosure;
fig. 3 is a schematic view of a gob filled by a filling method according to another embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
As previously mentioned, a large amount of goaf tends to remain after the coal mining operation. If the goafs are not reinforced or backfilled, collapse is likely to occur after a period of time, so that the ground subsides or collapse pits are formed on the ground surface, and further, the problem that personnel or equipment fall into the goafs or the ground above the goafs cannot be utilized is caused. The existence of the goaf forms great potential safety hazard to the mining area, and the goaf becomes an important problem restricting the development of the mining area and the utilization of the ground above the goaf at present.
A large amount of coal gangue is also generated in the coal mining process. The accumulation of coal gangue requires a large amount of land and may cause air pollution or fire due to spontaneous combustion during storage. The coal gangue can be used for filling a goaf in the process of mining.
Goaf filling usually adopts a full-mining and full-filling mode, but the mode needs a large amount of filling materials. Generally, the volume of gangue produced in mining is often far smaller than the space volume of a goaf, so a large amount of other filling materials such as river sand, crushed stone and the like need to be supplemented to meet the filling requirement of the goaf, and the filling cost is greatly increased. And because the granularity of the solid needed in the filling process has the specified requirement, the coal gangue crushing also needs to consume larger cost.
The method for alternately filling by using multiple filling materials not only solves the problems of coal gangue accumulation and insufficient filling materials in time and efficiently, but also better solves the problem of filling cost.
Exemplarily, fig. 1 illustrates a flowchart of a goaf-filling method according to an embodiment of the present disclosure. As shown in fig. 1, the method includes:
s101: dividing the goaf into a first group of filling regions, a second group of filling regions and an isolation region, wherein the isolation region is located between the first group of filling regions and the second group of filling regions and is used for separating the first group of filling regions from the second group of filling regions;
s102: filling the first set of filling areas with a first filling material;
s103: filling the isolation region with a foaming material to form an isolation layer;
s104: the second set of filling areas is filled with a second filling material.
In some examples of the filling method shown in fig. 1, the first group of filling zones may comprise one or more first filling subsections; the second set of infill regions may comprise one or more second infill sections; the isolation region may comprise one or more isolation partitions; the plurality of first infill sections alternate with the plurality of second infill sections, and adjacent first infill sections are separated from adjacent second infill sections by the partition. That is, the infill region may have a structure such as "first infill section/sequestered section/second infill section/sequestered section/first infill section".
In the embodiment shown in fig. 1, one or more first fill segments of the first set of fill regions, one or more second fill segments of the second set of fill regions, and one or more isolation segments of the isolation region may have any suitable shape, such as a strip or block shape, for example.
In some embodiments, the first infill material in the plurality of first infill sections may form a first set of infill strips, the first set of infill strips including a plurality of first infill sections corresponding to the plurality of first infill sections; the second filling material in the second plurality of filling segments may form a second set of filling bands, the second set of filling bands including a plurality of second filling segments corresponding to the second plurality of filling segments; the foamed material in the plurality of isolation zones may form an isolation zone comprising a plurality of isolation sub-zones corresponding to the plurality of isolation zones, wherein a plurality of first filled sub-zones are alternately arranged with a plurality of second filled sub-zones, and adjacent first filled sub-zones are separated from second filled sub-zones by the isolation sub-zones. For example, the filling section may have a structure of "first filling segment/isolation segment/second filling segment/isolation segment/first filling segment". In one example, the plurality of first fill sub-bands, the plurality of second fill sub-bands, and the plurality of isolation sub-bands may be perpendicular to the horizontal plane. In another example, the plurality of first fill sub-strips, the plurality of second fill sub-strips, and the plurality of isolation sub-strips may be parallel to a horizontal plane. In yet another example, the first plurality of filled sub-bands, the second plurality of filled sub-bands, and the isolation sub-bands may be at an angle to horizontal that may be greater than 0 degrees and less than 90 degrees. The above-listed cases are merely exemplary, and the embodiments of the present disclosure do not limit the arrangement of the first filling sub-band, the second filling sub-band, and the isolation sub-band.
For example, each of the plurality of first filled sub-bands, each of the plurality of second filled sub-bands, and each of the isolation sub-bands may have any suitable width. For example, each of the plurality of first infill sub-bands and each of the plurality of second infill sub-bands may have widths of the same or different heights. Each of the plurality of first infill sub-bands and each of the plurality of second infill sub-bands may independently have a width in a range of about 3 to about 30 meters, for example, independently in a range of about 3 meters to about 25 meters, about 5 meters to about 20 meters, about 5 meters to about 15 meters, or about 5 to about 10 meters. For example, each of the plurality of first infill sub-bands and each of the plurality of second infill sub-bands can independently have a width of about 5 meters, about 8 meters, about 10 meters, about 15 meters, about 20 meters, about 25 meters, or about 30 meters, and so forth. Each of the plurality of isolated sub-bands may have the same or different widths. The width of each of the plurality of isolation sub-zones may independently be in the range of about 0.05 meters to about 5 meters, for example, independently in the range of about 0.05 meters to about 4 meters or in the range of about 0.1 meters to about 2 meters. For example, each of the plurality of isolation sub-zones independently has a width of about 0.05 meters, about 0.1 meters, about 0.3 meters, about 0.5 meters, about 1 meter, about 1.5 meters, or about 2 meters, etc. In other examples, the ratio between the width of each of the plurality of first filled sub-bands, each of the plurality of second filled sub-bands, and each of the plurality of isolation sub-bands may be, for example, about 3-30: about 3 to about 30: about 0.05 to 5, such as about 5 to 10: about 5 to about 10: about 1. The above-listed cases are merely exemplary, and embodiments of the present disclosure do not limit the widths of the first filling sub-band, the second filling sub-band, and the isolation sub-band and the ratios therebetween.
In other embodiments, the plurality of first infill sections, the plurality of second infill sections may also have a block-like form; the plurality of spaced-apart regions may be in the form of a dividing wall or dividing layer surrounding each of the plurality of first infill regions and each of the plurality of second infill regions and dividing adjacent first infill regions and/or second infill regions. That is, the filling zone may have a "honeycomb" like structure.
In the embodiment shown in fig. 1, the foaming material may include one or more of an organic foaming material and an inorganic foaming material. For example, the organic foaming material may include, for example, one or more of foaming materials (also referred to as polymer foaming materials) containing a polymer as a matrix, and the like; the inorganic foaming material may include, for example, a foaming material containing an inorganic material as a matrix.
As used herein, a polymer foam refers to a microporous material having a polymer (plastic, rubber, elastomer, or natural polymer material) as a matrix and having innumerable bubbles in the interior thereof, and can also be considered as a composite material having a gas as a filler. In some examples, the polymeric foam material may include a polymer, a blowing agent, a filler, water, and optionally other additives (e.g., stabilizers, etc.). In some examples, the polymer used in the polymer foam may include one or more resins, such as one or more of polyester, polyurethane, polyurea, polyolefin, phenolic, urea-formaldehyde, epoxy, nitrile rubber, and other resins. In still other examples, the filler used in the polymeric foam material may include any filler suitable for use in a polymeric foam material, including, for example, one or more of fly ash, calcium carbonate, kaolin, bentonite, powdered molecular sieves, talc, titanium dioxide, barite powder, or other fillers, as embodiments of the present disclosure are not limited in this respect.
As used herein, the inorganic foaming material refers to a microporous material having an inorganic material as a matrix and having innumerable bubbles inside. In some examples, the inorganic foaming material may include cement, a foaming agent, water, optionally a filler and one or more other additives, and the like. For example, the inorganic foaming material may be foamed cement, foamed concrete, or the like. In some examples, the binder used in the inorganic foamed material may include, but is not limited to, one or more of cement, rubber powder, or the like. In still other examples, the filler used in the inorganic foamed material may include any material suitable for use in the inorganic foamed material, including, for example, one or more of fly ash, silica fume, crushed stone, river sand, or the like, as embodiments of the present disclosure are not limited in this respect.
In some examples, blowing agents useful in the organic or inorganic foamed materials of the present disclosure may include, but are not limited to, one or more of physical blowing agents, chemical blowing agents, surfactant-based blowing agents. For example, a physical blowing agent as used herein can be an inorganic or organic substance, such as inert gases, low boiling liquids, and solid hollow spheres, etc., that can cause the substance to expand and form a plurality of bubbles therein by a physical change. Examples of physical blowing agents may include, but are not limited to, low boiling alkanes, cycloalkanes, fluorocarbons (freons), and the like, for example, one or more of n-pentane, isopentane, cyclopentane, n-hexane, n-heptane, petroleum ether (naphtha), trichlorofluoromethane, dichlorodifluoromethane, dichlorotetrafluoroethane, and the like. For example, a chemical blowing agent as used herein can be an inorganic or organic substance that releases a gas by a chemical change, causing the substance to expand and form bubbles therein. Examples of the chemical blowing agent may include organic chemical blowing agents such as azo compounds, sulfonyl hydrazide-based compounds, nitroso compounds, etc., inorganic chemical blowing agents such as carbonate-based compounds, peroxide-based compounds, etc., and combinations thereof. For example, a surfactant-based foaming agent as used herein may be a material that generates a large amount of foam in a material upon introduction of mechanical force into air, resulting in foaming, such as one or more anionic surfactants, and the like. Examples of the surfactant-based foaming agent may include one or more of sodium lauryl sulfate, sodium fatty alcohol-polyoxyethylene ether sulfate (AES), rosin soap-based foaming agent, animal and vegetable protein-based foaming agent, pulp waste liquid, or the like. The examples of the present disclosure do not limit the kind of the foaming agent as long as it can foam the corresponding organic or inorganic material under ambient conditions.
In addition to the various ingredients of the foamed material listed above, various other additives commonly used in foamed materials, including but not limited to stabilizers, flame retardants, and the like, may also be included in the foamed material used in embodiments of the present disclosure. Embodiments of the present disclosure are not limited in this regard.
In the embodiment shown in fig. 1, the first filling material and the second filling material may be the same or different. For example, the first filler material may be a solid filler material and the second filler material may be a paste filler material. Alternatively, the first filling material and the second filling material may be both solid filling materials or both paste filling materials. Alternatively, the first filling material and the second filling material may be the same or different other materials.
As used herein, a solid filling material may be a filling material that is in a solid state both when the filling operation is performed and after the filling is completed, and may also be referred to as a dry filling material. In some examples, the solid packing material may include, but is not limited to, one or more of gangue, ore, wood, coal mine, construction waste. For example, the solid packing material may be coal gangue. For example, the coal refuse may be larger size coal refuse obtained after screening newly mined coal refuse or stored coal refuse, e.g., coal refuse having a size of greater than or equal to about 500mm, or having a size of greater than or equal to about 300mm, or having a size of greater than or equal to about 100 mm.
As used herein, a paste filling material may be a filling material that is in a paste state when a filling operation is performed and solidifies to form a solid over a period of time after filling is completed. In some examples, the paste filling material may be a paste/slurry material including, for example, a filler, a binder, and water. As used herein, the filler used in the paste filling material may be, for example, one or more of crushed stone, river sand, construction waste, fly ash, slag, poor soil. For example, the filler may be crushed coal refuse. On the other hand, as used herein, the binder used in the paste filling material may be, for example, one or more of cement, gypsum, mortar, rubber powder, composite cement, and the like. The embodiments of the present disclosure do not limit the binder used in the paste filling material as long as it can achieve solidification of the paste filling material under ambient conditions.
In addition to the various ingredients of the paste filling material listed above, various other additives commonly used in paste filling materials may be included in the paste filling material used in the embodiments of the present disclosure, including but not limited to stabilizers, flame retardants, and the like. Embodiments of the present disclosure are not limited in this regard.
In the embodiment shown in fig. 1, step S102: filling the first group of filling areas with a first filling material, step S103: filling the isolation region with a foaming material to form an isolation layer, and step S104: the filling of the second filling zone with the second filling material may be performed in any order.
For example, after the gob is divided into the first group of filling regions, the second group of filling regions, and the isolation region in S101, the first group of filling regions may be filled first with the first filling material; then filling the isolation region between the filled first group of filling regions and the filled second group of filling regions with foaming material to form an isolation region for isolating the first group of filling regions and the second group of filling regions; the second set of filling regions is then filled with a second filling material.
Alternatively, for example, after the gob is divided into the first group of filling regions, the second group of filling regions and the isolation region in S101, the isolation region may be first filled with a foam material to form an isolation layer according to the planned groups of regions, thereby establishing a separation between the first group of filling regions and the second group of filling regions that have not yet been filled; subsequently, the first set of filling areas is filled with a first filling material and the second set of filling areas is filled with a second filling material, respectively.
Further alternatively, for example, after the gob is divided into the first group filling zone, the second group filling zone and the isolation zone in S101, the isolation zone between the first group filling zone and the second group filling zone may be first filled with the first filling material and the second filling material, respectively, and then filled with the foaming material according to the planned groups of zones, thereby creating the isolation layer between the filled first group filling zone and the filled second group filling zone.
In some examples, when the first set of fill regions includes a plurality of first fill sub-bands, the second set of fill regions includes a plurality of second fill sub-bands, the isolation region includes a plurality of isolation sub-bands, and each of the plurality of first fill sub-bands is alternating with and separated by each of the plurality of second fill sub-bands, one or more of the plurality of isolation sub-bands may be filled with a foaming material to form the isolation layer before filling one or more of the plurality of first fill sub-bands with the first fill material and before filling one or more of the plurality of second fill sub-bands with the second fill material. Alternatively, one or more of the plurality of spacer sub-strips may be filled with a foam material to form the spacer layer after filling one or more of the plurality of first filling sub-strips with the first filling material but before filling one or more of the plurality of second filling sub-strips with the second filling material.
For example, after the gob is divided into the first group of filling regions, the second group of filling regions, and the isolation region in S101, one of the first filling zona may be filled first with the first filling material; subsequently filling the isolation sub-zone between the filled first filling sub-zone and a second filling sub-zone adjacent to the first filling sub-zone, which is not filled yet, with a foaming material to form an isolation sub-zone for isolating the first filling sub-zone from the second filling sub-zone; then, filling the second filling band with a second filling material; and repeating the steps until all the first filling sub-zone, the second filling sub-zone and the isolation sub-zone are filled.
Alternatively, for example, after the gob is divided into the first group of filling regions, the second group of filling regions and the isolation region in S101, at least a part of the isolation zonal may be filled with a foaming material to form one or more isolation layers according to the planned groups of regions, thereby creating a separation between at least a part of the first group of filling regions and at least a part of the second group of filling regions that have not yet been filled; subsequently, filling the first filling sub-band with a first filling material and the second filling sub-band with a second filling material, respectively, on both sides of at least a part of the isolation sub-band that has been filled; and repeating the steps as required until all the first filling sub-zone, the second filling sub-zone and the isolation sub-zone are filled.
In the embodiment shown in fig. 1, the filling method may further include the steps of: sieving the coal refuse, using the coal refuse having a size of greater than or equal to about 300mm (i.e., a first size) as a solid packing material (i.e., a first packing material); crushing the coal refuse having a size of less than about 300mm to a size of less than or equal to about 30mm (i.e., a second size); and the crushed coal gangue is used as a filler to prepare a paste filling material (namely a second filling material). However, it will be appreciated by those skilled in the art that in other embodiments of the present disclosure, a larger or smaller first size may be used to separate the coal refuse when the coal refuse is being sieved; and when the screened coal gangue with the size smaller than the first size is crushed, the coal gangue can be crushed to a second smaller size as long as the first size is larger than the second size. Embodiments of the present disclosure are not limited in this regard.
The filling method provided by the embodiment of the present disclosure and the goaf filled thereby are explained in detail below by means of several specific examples.
Fig. 2 illustrates a schematic view of a gob filled by a filling method according to an embodiment of the present disclosure. As shown in fig. 2, the gob 200 includes: a first group of filling zones comprising first filling sub-zones 2011, 2012; a second set of infill regions comprising second infill sections 2021, 2022; isolation regions, including isolation partitions 2031, 2032, 2033, and 2024; and a to-be-filled region 204. Wherein the first group of filling regions, the second group of filling regions and the isolation region respectively comprise a plurality of sub-bands which are alternately arranged, and each sub-band is vertical to the horizontal plane. For example, as shown in fig. 2, the first group of filling regions, the second group of filling regions and the isolation regions are arranged in the following order: first packed sub-section 2011 → spacer sub-section 2031 → second packed sub-section 2021 → spacer sub-section 2032 → first packed sub-section 2012 → spacer sub-section 2033 → second packed sub-section 2022 → spacer sub-section 2034. The region to be filled 204 is located outside the isolated sector 2034.
As shown in fig. 2, for example, the first filling subareas 2011, 2012 are filled with coal gangue as solid filling material. The coal refuse is obtained by screening coal refuse with a size greater than or equal to about 300mm and directly using for filling. However, in other embodiments, the filler material used in the first filling zone may also be other solid filler materials, such as coal gangue with larger or smaller screen sizes or coal mines, wood, river sand, crushed rock, broken construction waste, etc.; or the filling material used in the first filling zone may also be a paste filling material. Embodiments of the present disclosure do not limit the fill material used in the first fill zone.
As shown in fig. 2, the second filling sub-sections 2021, 2022 are filled with a paste filling material. The paste filling material is prepared by crushing screened coal gangue with the size of less than 300mm into crushed coal gangue with the particle size of no more than 30mm and mixing the crushed coal gangue with cementing material, water and other components. However, in other embodiments, the filling material used in the second filling area may be other paste filling materials, such as paste materials made by mixing the filling material, cement, water and other components, such as river sand, construction waste, fly ash, slag, poor soil, and the like; alternatively, the filler material used in the second filling zone may also be a solid filler material. Embodiments of the present disclosure do not limit the fill material used in the second fill zone.
For example, the insulated compartments 2031, 2032, 2033, and 2034 are filled with a polymer foam material. The polymer foam material comprises phenolic resin, a foaming agent, a filler, a stabilizer and water. For example, in other embodiments, the foaming material used in the isolation area may also be other polymer foaming materials or other inorganic foaming materials such as foamed concrete. Embodiments of the present disclosure are not limited to the foam material used in the isolation zone.
In the goaf shown in fig. 2 filled according to the filling method of an embodiment of the present disclosure, the first group of filling zones includes two first filling subsections; the second group of filling areas comprises two second filling subareas; the isolation region comprises three isolation partitions; and includes a region to be filled. However, other embodiments of the present disclosure may include other numbers of first infill sections, second infill sections, and sequestered sections, and may not include an area to be infilled. For example, three or more first infill sections, three or more second infill sections, and a corresponding number of spacer sections located between and separating adjacent first infill sections and second infill sections may be independently included and not include the area to be infilled. The embodiment of the disclosure does not limit the number of the first filling subarea, the second filling subarea and the isolation subarea, and does not limit whether the area to be filled exists or not.
Fig. 3 illustrates a schematic view of a gob filled by a filling method according to another embodiment of the present disclosure. As shown in fig. 3, the gob 300 includes: a first set of infill regions comprising first infill partitions 3011, 3012; a second group of filling regions comprising second filling sub-regions 3021, 3022; an isolation region comprising isolation partitions 3031, 3032, 3033, and 3034; and a region to be filled 304. Wherein the first group of filling regions, the second group of filling regions and the isolation region each comprise a plurality of sub-bands arranged alternately, and each sub-band is parallel to the horizontal plane. For example, as shown in fig. 3, the first group of filling regions, the second group of filling regions and the isolation regions are arranged in the following order: the first packed partition 3011 → the isolated partition 3031 → the second packed partition 3021 → the isolated partition 3032 → the first packed partition 3012 → the isolated partition 3033 → the second packed partition 3022 → the isolated partition 3034. The region to be filled 304 is located outside the isolation partition 3034.
The first filling sub-sections 3011, 3012 as shown in fig. 3 are filled with the same coal gangue filling material as shown in fig. 2; the second filling sub-sections 3021, 3022 are filled with the same paste filling material as shown in fig. 2. However, in other embodiments, the filling material used in the first group of filling areas and the second group of filling areas may be other suitable filling materials. Embodiments of the present disclosure are not limited in this regard.
In the embodiment shown in fig. 3, isolation zones 3031, 3032, 3033, and 3034 are filled with a foamed concrete material. The foamed concrete material comprises cement, fly ash, water and other additives. For example, in other embodiments, the foaming material used in the isolation area may also be other polymer foaming materials or other inorganic foaming materials such as foaming cement. Embodiments of the present disclosure are not limited in this regard.
In the gob filled by the filling method according to another embodiment of the present disclosure shown in fig. 3, the first group of filling zones includes two first filling subsections; the second group of filling areas comprises two second filling subareas; the isolation region comprises three isolation partitions; and includes a region to be filled. However, other embodiments of the present disclosure may include other numbers of first infill sections, second infill sections, and sequestered sections, and may not include an area to be infilled. For example, three or more first infill sections, three or more second infill sections, and a corresponding number of spacer sections located between and separating adjacent first infill sections and second infill sections may be independently included and not include the area to be infilled. The embodiment of the disclosure does not limit the number of the first filling subarea, the second filling subarea and the isolation subarea, and does not limit whether the area to be filled exists or not.
In the gob filled by the filling method according to at least one embodiment of the present disclosure shown in fig. 2 and 3, the plurality of first filling segments, the plurality of second filling segments, and the plurality of partition segments are in the form of a strip parallel or perpendicular to a horizontal plane. However, in other embodiments of the present disclosure, the plurality of first infill sections, the plurality of second infill sections, and the plurality of sequestered sections may have other shapes or be arranged in other ways. For example, the plurality of first infill sections, the plurality of second infill sections, and the plurality of spacer sections may each form a slanted band-like form at an angle to the horizontal. Alternatively, for example, the plurality of first infill sections and the plurality of second infill sections may each be in the form of blocks arranged in a staggered arrangement, and the partition section may be in the form of a partition wall or partition layer surrounding each of the plurality of first infill sections and each of the plurality of second infill sections and separating adjacent first infill sections and/or second infill sections. Embodiments of the present disclosure are not limited in this regard.
The filling method provided by at least one embodiment of the disclosure adopts an alternate filling mode to fill the goaf, and adopts the foaming material as the isolation layer between different filling material areas to ensure that the filling materials do not move in series; the isolation layer formed by the foaming material uses less materials, occupies larger space after foaming is finished, has higher strength and can effectively reduce the requirement on the filling material; the foaming layer is used as a spacer between different areas, the foaming layer does not need to be dismantled after foaming is finished, and the foaming layer can be arranged and planned in advance according to requirements and is controllable in information such as filling amount. In addition, the treatment cost is reduced by directly filling the large coal gangue blocks; the small coal gangue is mixed with cementing material, fly ash and water to prepare the paste for filling, so that the problem of insufficient supporting force of the small coal gangue is solved, and good filling strength is realized; the multiple filling materials are alternately filled, so that the filling cost is reduced and the filling efficiency is improved on the basis of ensuring the filling effect.
The following points need to be explained:
(1) the drawings of the embodiments of the disclosure only relate to the structures related to the embodiments of the disclosure, and other structures can refer to the common design.
(2) In the drawings used to describe embodiments of the present disclosure, the thickness of structures or regions are exaggerated or reduced for clarity, i.e., the drawings are not drawn to scale.
(3) Without conflict, embodiments of the present disclosure and features of the embodiments may be combined with each other to arrive at new embodiments.
The above is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and the scope of the present disclosure should be determined by the scope of the claims.
Claims (19)
1. A gob filling method comprising:
dividing the goaf into a first group of filled regions, a second group of filled regions, and an isolation region located between and separating the first group of filled regions from the second group of filled regions;
filling the first set of filling zones with a first filling material;
filling the isolation region with a foaming material to form an isolation layer;
filling the second filling region with a second filling material.
2. The method of claim 1, wherein,
the first set of infill regions comprises a plurality of first infill sections;
said second set of packing areas comprises a plurality of second packing sub-areas;
the isolation region comprises a plurality of isolation partitions;
the plurality of first infill sections alternate with the plurality of second infill sections, and
the adjacent first infill compartment and the second infill compartment are separated by the spacer compartment.
3. The method of claim 2, wherein,
the first infill material in the plurality of first infill sections of the first set of infill zones forms a first set of infill strips, the first set of infill strips including a plurality of first infill sections corresponding to the plurality of first infill sections;
the second filler material in the second plurality of infill sections of the second set of infill sections forming a second set of infill strips, the second set of infill strips including a plurality of second infill strips corresponding to the second plurality of infill sections;
the foamed material in the plurality of isolation zones of the isolation zone forming an isolation band comprising a plurality of isolation sub-bands corresponding to the plurality of isolation zones,
wherein,
the plurality of first filling sub-bands and the plurality of second filling sub-bands are alternately arranged, and
adjacent ones of the first and second fill sub-bands are separated by the isolation sub-band.
4. The method of claim 3, wherein the first plurality of filled sub-bands, the second plurality of filled sub-bands, and the isolated sub-bands are perpendicular to a horizontal plane.
5. The method of claim 3, wherein the first plurality of filled sub-bands, the second plurality of filled sub-bands, and the plurality of isolated sub-bands are parallel to a horizontal plane.
6. The method of claim 4, wherein,
filling one or more of the plurality of isolation sub-bands with the foamed material to form the isolation sub-band before filling one or more of the plurality of first filling sub-bands with the first filling material and before filling one or more of the plurality of second filling sub-bands with the second filling material, or
Filling one or more of the plurality of isolation sub-bands with the foamed material to form the isolation sub-band after filling one or more of the plurality of first filling sub-bands with the first filling material and before filling one or more of the plurality of second filling sub-bands with the second filling material.
7. The method of claim 5, wherein,
filling one or more of the plurality of isolation sub-bands with the foamed material to form the isolation sub-band after filling one or more of the plurality of first filling sub-bands with the first filling material and before filling one or more of the plurality of second filling sub-bands with the second filling material.
8. The method of any one of claims 3-7,
each of the plurality of first filled sub-bands has a width of 5-10 meters;
each of the plurality of second filled sub-bands has a width of 5-10 meters;
each of the plurality of isolated sub-bands has a width of 0.1-2 meters.
9. The method of any of claims 3-7, wherein a width ratio of each of the plurality of first filled sub-bands, each of the plurality of second filled sub-bands, and each of the plurality of isolated sub-bands is 5-10:5-10: 1.
10. The method of any one of claims 1-7, wherein the foam material is one or more of an organic foam material, an inorganic foam material.
11. The method of claim 10, wherein,
the organic foaming material comprises one or more polymer foaming materials;
the polymer foam material comprises a resin, a foaming agent, a filler, a stabilizer and water.
12. The method of claim 11, wherein the resin is one or more of polyester, polyurethane, polyurea, polyolefin, phenolic resin, urea-formaldehyde resin, epoxy resin, nitrile rubber.
13. The method of claim 10, wherein the inorganic foaming material comprises a filler, a binder, a foaming agent, and water.
14. The method of claim 13 wherein the binder is cement or rubber powder.
15. The method of any one of claims 1-7,
the first filling material is a solid filling material,
the second filling material is a paste filling material.
16. The method of claim 15, wherein,
the solid filling material comprises one or more of gangue, ore, wood and construction waste.
17. The method of claim 15, wherein,
the paste filling material comprises a filler, a cementing material and water.
18. The method of claim 17, wherein the filler comprises one or more of crushed coal refuse, crushed construction waste, fly ash, slag, poor grade soil.
19. The method of claim 15, further comprising:
the coal gangue is sieved and sieved,
using the coal gangue with the size of more than or equal to 300mm as the solid filling material;
crushing the coal gangue with the size of less than 300mm to the size of less than or equal to 30 mm; and
and preparing the paste filling material by using the crushed coal gangue as a filler.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110994681.8A CN113638769B (en) | 2021-08-27 | 2021-08-27 | Goaf filling method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202110994681.8A CN113638769B (en) | 2021-08-27 | 2021-08-27 | Goaf filling method |
Publications (2)
Publication Number | Publication Date |
---|---|
CN113638769A true CN113638769A (en) | 2021-11-12 |
CN113638769B CN113638769B (en) | 2023-12-01 |
Family
ID=78424143
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202110994681.8A Active CN113638769B (en) | 2021-08-27 | 2021-08-27 | Goaf filling method |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN113638769B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115853583A (en) * | 2022-09-02 | 2023-03-28 | 中国矿业大学 | Method for reforming and utilizing abandoned mine roadway |
WO2024082011A1 (en) * | 2022-10-19 | 2024-04-25 | Gazmick Pty Ltd | Method of mining in underground mines including disposal of tailings |
Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3216896C1 (en) * | 1982-05-06 | 1983-11-24 | Schaum-Chemie Wilhelm Bauer GmbH & Co KG, 4300 Essen | Method of securing the caved goaf of underground excavations against spontaneous combustion |
CN101008315A (en) * | 2007-02-07 | 2007-08-01 | 邸建友 | Paste-like backfill technology used in coal cutting area and the paste-like thereof |
CN103089298A (en) * | 2013-01-23 | 2013-05-08 | 中国矿业大学 | Structure and method for building side direction multicolumn gob-side entry retaining filling wall body |
CN103485820A (en) * | 2013-10-09 | 2014-01-01 | 山东科技大学 | Filling wall body capable of protecting laneway through soft yielding in non-chain-pillar filling mining and construction method thereof |
CN103643992A (en) * | 2013-12-10 | 2014-03-19 | 中国恩菲工程技术有限公司 | Filling method for mining |
CN104024762A (en) * | 2011-11-22 | 2014-09-03 | 乔治·E·加尔法伊德 | Mining system with sustainable energy reservoir legacy |
CN104179527A (en) * | 2014-05-13 | 2014-12-03 | 中国神华能源股份有限公司 | Coal mine connection roadway and sealing method thereof |
CN104963715A (en) * | 2015-05-11 | 2015-10-07 | 山东科技大学 | Dynamic isolation control method for coupling disaster of high-gas easy-self-ignition fully-mechanized caving gob |
CN106014410A (en) * | 2016-06-21 | 2016-10-12 | 中南大学 | Filling mining method for downward access part |
CN108439910A (en) * | 2018-05-09 | 2018-08-24 | 中国矿业大学 | A kind of early power dilatancy filler and its fill method |
CN109139109A (en) * | 2018-08-02 | 2019-01-04 | 缪协兴 | A kind of method on the artificial water storage stratum of solid filling coal-mining technique |
CN109372576A (en) * | 2018-09-27 | 2019-02-22 | 山东东山王楼煤矿有限公司 | A kind of method in spoil filling in mine goaf |
CN110486082A (en) * | 2019-09-09 | 2019-11-22 | 河北充填采矿技术有限公司 | A kind of method that goaf different materials alternately fill |
CN111075505A (en) * | 2019-12-17 | 2020-04-28 | 天地科技股份有限公司 | Coal mine fully-mechanized coal mining face segmented filling mining method |
CN111088979A (en) * | 2019-12-03 | 2020-05-01 | 南华大学 | Downward access filling mining method |
WO2020098089A1 (en) * | 2018-11-15 | 2020-05-22 | 山东科技大学 | Filling mining method for fully mechanized top coal caving working face |
CN111594263A (en) * | 2020-05-14 | 2020-08-28 | 山东康格能源科技有限公司 | Dry-wet combined gangue filling method |
CN112502772A (en) * | 2020-11-27 | 2021-03-16 | 安徽理工大学 | Goaf solid waste-ultrahigh water paste alternating filling method |
-
2021
- 2021-08-27 CN CN202110994681.8A patent/CN113638769B/en active Active
Patent Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3216896C1 (en) * | 1982-05-06 | 1983-11-24 | Schaum-Chemie Wilhelm Bauer GmbH & Co KG, 4300 Essen | Method of securing the caved goaf of underground excavations against spontaneous combustion |
CN101008315A (en) * | 2007-02-07 | 2007-08-01 | 邸建友 | Paste-like backfill technology used in coal cutting area and the paste-like thereof |
CN104024762A (en) * | 2011-11-22 | 2014-09-03 | 乔治·E·加尔法伊德 | Mining system with sustainable energy reservoir legacy |
CN103089298A (en) * | 2013-01-23 | 2013-05-08 | 中国矿业大学 | Structure and method for building side direction multicolumn gob-side entry retaining filling wall body |
CN103485820A (en) * | 2013-10-09 | 2014-01-01 | 山东科技大学 | Filling wall body capable of protecting laneway through soft yielding in non-chain-pillar filling mining and construction method thereof |
CN103643992A (en) * | 2013-12-10 | 2014-03-19 | 中国恩菲工程技术有限公司 | Filling method for mining |
CN104179527A (en) * | 2014-05-13 | 2014-12-03 | 中国神华能源股份有限公司 | Coal mine connection roadway and sealing method thereof |
CN104963715A (en) * | 2015-05-11 | 2015-10-07 | 山东科技大学 | Dynamic isolation control method for coupling disaster of high-gas easy-self-ignition fully-mechanized caving gob |
CN106014410A (en) * | 2016-06-21 | 2016-10-12 | 中南大学 | Filling mining method for downward access part |
CN108439910A (en) * | 2018-05-09 | 2018-08-24 | 中国矿业大学 | A kind of early power dilatancy filler and its fill method |
CN109139109A (en) * | 2018-08-02 | 2019-01-04 | 缪协兴 | A kind of method on the artificial water storage stratum of solid filling coal-mining technique |
CN109372576A (en) * | 2018-09-27 | 2019-02-22 | 山东东山王楼煤矿有限公司 | A kind of method in spoil filling in mine goaf |
WO2020098089A1 (en) * | 2018-11-15 | 2020-05-22 | 山东科技大学 | Filling mining method for fully mechanized top coal caving working face |
CN110486082A (en) * | 2019-09-09 | 2019-11-22 | 河北充填采矿技术有限公司 | A kind of method that goaf different materials alternately fill |
CN111088979A (en) * | 2019-12-03 | 2020-05-01 | 南华大学 | Downward access filling mining method |
CN111075505A (en) * | 2019-12-17 | 2020-04-28 | 天地科技股份有限公司 | Coal mine fully-mechanized coal mining face segmented filling mining method |
CN111594263A (en) * | 2020-05-14 | 2020-08-28 | 山东康格能源科技有限公司 | Dry-wet combined gangue filling method |
CN112502772A (en) * | 2020-11-27 | 2021-03-16 | 安徽理工大学 | Goaf solid waste-ultrahigh water paste alternating filling method |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115853583A (en) * | 2022-09-02 | 2023-03-28 | 中国矿业大学 | Method for reforming and utilizing abandoned mine roadway |
WO2024082011A1 (en) * | 2022-10-19 | 2024-04-25 | Gazmick Pty Ltd | Method of mining in underground mines including disposal of tailings |
Also Published As
Publication number | Publication date |
---|---|
CN113638769B (en) | 2023-12-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN113638769B (en) | Goaf filling method | |
CN110905515B (en) | Combined filling mining method for complex ore body | |
CN111088979B (en) | Downward access filling mining method | |
US20200116022A1 (en) | Methods and systems for foam mine fill | |
CA2871595C (en) | Foamed cement compositions containing metal silicides usable in subterranean well operations | |
CN101381191B (en) | Sludge treatment method and sludge foaming lightweight concrete produced therefrom and use | |
CN101391902A (en) | Foaming concrete made by waste and old concrete and production method thereof and use | |
JP2010037872A (en) | Method of filling underground space part | |
AU2018431390A1 (en) | Method for recovering room-type coal pillars by cemented filling of reserved roadways | |
CN104743999A (en) | Dual-component mining foam paste filling material and preparation method thereof | |
CN103485820A (en) | Filling wall body capable of protecting laneway through soft yielding in non-chain-pillar filling mining and construction method thereof | |
CN114472462B (en) | Underground-aboveground linkage coal gangue disposal system and disposal method | |
Kazemian et al. | Assessment of stabilization methods for soft soils by admixtures | |
CN114622953B (en) | Coal mine gangue and CO 2 Mining overburden rock isolation grouting filling emission reduction method | |
CN117449900A (en) | Method for controlling stope rock stratum movement and earth surface subsidence | |
US3747353A (en) | Novel low pressure back-fill and process therefore | |
CN109555536A (en) | It is a kind of to divide the more slurries joint decompression truncation slip-casting control methods of sequence and system | |
Pusch | Backfilling with mixtures of bentonite/ballast materials or natural smectitic clay? | |
CN104230278B (en) | A kind of colliery foamed cement and preparation and application thereof | |
KR102296412B1 (en) | Method of filling void space with polyurthane foam for emergency treatment | |
CN107129251B (en) | Curing agent for treating soft soil foundation by blasting drainage consolidation and treatment method | |
US20210395144A1 (en) | Grout material for heat transfer | |
CN111441773B (en) | Retention method for mining ore pillar by room-pillar method for slowly-inclined medium-thickness ore body | |
CN110952998B (en) | Supporting method for fault broken roof | |
JP4994492B2 (en) | Aggregate for filling mortar and method for producing the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |