AU2018413756A1 - Synergistic mining method for underground mining, separation and filling for a close distance coal seam group - Google Patents
Synergistic mining method for underground mining, separation and filling for a close distance coal seam group Download PDFInfo
- Publication number
- AU2018413756A1 AU2018413756A1 AU2018413756A AU2018413756A AU2018413756A1 AU 2018413756 A1 AU2018413756 A1 AU 2018413756A1 AU 2018413756 A AU2018413756 A AU 2018413756A AU 2018413756 A AU2018413756 A AU 2018413756A AU 2018413756 A1 AU2018413756 A1 AU 2018413756A1
- Authority
- AU
- Australia
- Prior art keywords
- gangue
- mining
- coal
- filling
- underground
- 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
- 239000003245 coal Substances 0.000 title claims abstract description 129
- 238000005065 mining Methods 0.000 title claims abstract description 127
- 238000011049 filling Methods 0.000 title claims abstract description 62
- 238000000926 separation method Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000002195 synergetic effect Effects 0.000 title claims abstract description 13
- 238000009423 ventilation Methods 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000002411 adverse Effects 0.000 abstract description 2
- 239000011435 rock Substances 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 241001465754 Metazoa Species 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- 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
- E21F1/00—Ventilation of mines or tunnels; Distribution of ventilating currents
- E21F1/04—Air ducts
-
- 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
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/06—Transport of mined material at or adjacent to the working face
-
- 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
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)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- Combined Means For Separation Of Solids (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
Abstract The present invention relates to a synergistic mining method for underground mining, separation and filling for a close distance coal seam group, which is applicable to the mining engineering field. Full-mechanized caving mining is carried out for a close distance coal seam group, an underground coal gangue separation system and a filling face are designed according to the yield of gangue in the production process; the gangue produced in the mining process is transported centrally into an underground coal gangue separation chamber, and the separated gangue is transported to the filling face for filling and mining; the gangue produced at the filling face is transported back to the filling face for backfilling after underground washing separation. The method realizes zero gangue discharge under the conditions of integrated coal and gangue mining in a close distance coal seam group, eliminates the adverse impact of surface gangue dump on the environment, improves the hoisting rate of clean coal, mitigates the burden on the main hoisting equipment; besides, the method employs an approach of separating nearby and filling at selected locations, greatly reduces the damage and disturbance to the underground rock mass that may be caused by a conventional mining method, and solves the difficult problems in treatment of strong dynamic pressure in advance.
Description
Description
Synergistic Mining Method for Underground Mining, Separation and Filling for a Close Distance Coal Seam Group
I, Technical Field
The present invention relates to a synergistic mining method for underground mining, separation and filling for a close distance coal seam group, and belongs to the mining engineering field.
II, Background Art
In the Safety Regulations in Coal Mine in China, close distance coal seams are defined as: coal seams that are at a close distance from each other and have severe interference with each other during mining. At present, there are 3 ways for mining a close distance coal seam group in China and foreign countries: layer-by-layer upward/downward mining, combined mining, and integrated coal and gangue mining. In a case that the distance between the coal seams is relatively great, utilizing reasonable layer-by-layer upward/downward mining or combined mining can realize stress-relief mining, reduce the interference between upper seam and lower seam during mining, create favorable conditions for subsequent mining, and improve the production efficiency. In a case that the distance between the coal seams is relatively small, especially in a case that the distance between the coal seams is very close, the influence range of utilizing layer-by-layer upward/downward mining or combined mining will be very large, the integrity degree of the roof and floor of the coal seam to be mined next will have been affected by the damage in the mining of the previous coal seam before it is mined; consequently, many new mine pressure phenomena will appear in the mining of the coal seam to be mined next, when compared with the case of mining of a single coal seam. In such circumstances, mining of coal seams that are relatively thin is often abandoned in a coal mine, resulting in severe waste of resources. Utilizing full-mechanized caving mining to realize integrated coal and gangue mining can effectively avoid the effects of complex strata behaviors incurred by layer-by-layer mining, improve raw coal recovery ratio by mining the coal seam in entire thickness at one time, and reduce the waste of coal resources; however, a large quantity of gangue may be produced in the production process, which affects coal quality and increases the burden on the main transportation and the main shaft hoisting system. The gangue dump formed by gangue hoisted to the ground surface covers or destroys the vegetation of the original landform; the dust and toxic substances produced in the spontaneous combustion process of gangue and leaching water of gangue that contains heavy metal elements formed in rainfall or spraying causes severe impacts on the living environment of ambient animals and plants. According to the general plan of the state, no permanent surface gangue dump is permitted for any new coal mine, and long-time dumping of solid wastes (e.g., gangue) on the ground is forbidden for existing coal mines. At present, there is no mining method that can realize efficient mining in a close distance coal seam group while avoiding gangue discharge on the ground.
III, Contents of the Invention • i ·
Technical Problem: in view of the drawbacks in the above-mentioned techniques, the present invention provides a synergistic mining method for underground mining, separation and filling for a close distance coal seam group, which has simple steps, eliminates the adverse impact of surface gangue dump on the environment, improves the clean coal hoisting rate, mitigates the burden on the main hoisting equipment, and employs an approach of separating nearby and filling at selected locations, greatly reduces the damage and disturbance to the underground rock mass caused by a conventional mining method, and solves the difficult problems in treatment of strong dynamic pressure in advance.
Technical Scheme: to attain the above-mentioned technical object, the synergistic mining method for underground mining, separation and filling for a close distance coal seam group according to the present invention comprises the following steps:
a. designing a fully mechanized caving face, designing a filling face in an appropriate mining area according to the annual gangue yield in the mining area, and arranging a sectional transportation roadway II and a sectional ventilation roadway at both sides of the filling face;
b. designing the size of an underground coal gangue separation chamber and designing an underground coal gangue separation system according to the annual yield of gangue in the mining area, wherein the underground coal gangue separation system comprises a sectional transportation roadway I in the same direction as the fully mechanized caving face, the tail end of the sectional transportation roadway I is connected with the underground coal gangue separation chamber via a mining area transportation roadway I, the underground coal gangue separation chamber is connected with the sectional ventilation roadway via a gangue concentration roadway arranged below the underground coal gangue separation chamber, and the underground coal gangue separation chamber is connected with the sectional transportation roadway II via the mining area transportation roadway II;
c. mining at the fully mechanized caving face, determining the mining height and caving height of the coal mining machine according to the thickness of the close distance coal seam group and the thickness of the gangue-containing seam, and transporting the coal gangue produced in the mining process through the sectional transportation roadway I to the mining area transportation roadway I;
d. transporting the coal gangue through the mining area transportation roadway I into the underground coal gangue separation chamber for coal gangue separation, controlling the obtained gangue to fall into the gangue concentration roadway by gravity, and finally transporting the gangue to the sectional ventilation roadway;
e. filling and mining the filling face with the coal gangue transported to the sectional ventilation roadway, determining the advance rate of the filling face according to the requirement for the filling rate in the mine, transporting the coal gangue produced in the mining process at the filling face through the sectional transportation roadway II to the mining area transportation roadway II and finally into the underground coal gangue separation chamber; then repeating step d;
f. repeating steps c, d and e, and so on, to accomplish the mining in the entire mining area.
• 2 ·
The location of the filling face shall be selected in a mining area where conditions for fully mechanized caving and integrated coal and gangue mining in the close distance coal seam group are unavailable or in a mining area where the distance between the coal seams in the coal seam group is relatively great and the coal seam group can be normally mined upward/downward layer by layer or mined in combination.
The annual gangue yield Q is calculated according to the formula Q = + p2^2m2) + ^2^2^1 mi, where is the annual advance length of the fully mechanized caving face, dY is the width of the fully mechanized caving face, p± is the apparent density of the coal, h± is the total thickness of the close distance coal seam group, ττΐγ is the primary separation rate of gangue from the raw coal, p2 is the apparent density of the gangue, h2 is the total thickness of the gangue seams, m2 is the primary separation rate of the gangue, L2 is the annual advance length of the filling face, d2 is the width of the filling face, and h3 is the mining height of the filling face.
The parameter design of the filling face is determined according to a formula Q = L2d2hcp2, wherein hc is the fillable height of the filling face.
The total thickness of the gangue seams in the close distance coal seam group involved in the full-mechanized caving mining is not more than 2.0m, the thickness of each gangue seam is not more than 1.0m, and appropriate measures may be taken for the gangue seams according to the actual conditions to increase the caving property.
Beneficial Effects:
1) The method provided in the present invention realizes underground gangue separation and filling nearby, mitigates the burden on the main hoisting equipment, saves the hoisting cost per ton coal and increases the hoisting rate of clean coal;
2) The gangue produced in the process of full-mechanized caving and integrated coal and gangue mining in a close distance coal seam group is treated properly, the environmental pollution caused by surface discharge of gangue is eliminated, and green mining is realized, while the raw coal recovery rate of the close distance coal seam group is improved;
3) Compared with coal pillars, the gangue filling face formed after filling and mining has the advantages of slow pressure relief and deformation; thus, the potential safety hazards of dynamic disasters resulted from the residual coal pillars and skip-mining can be handled in advance.
IV. Description of Drawings
Fig. 1 shows the synergistic mining method for underground mining, separation and filling of a close distance coal seam group according to the present invention.
In the figures: 1 - fully mechanized caving face; 2 - sectional transportation roadway I; 3 - mining area transportation roadway I; 4 - underground coal gangue separation chamber; 5 - gangue concentration roadway; 6 - mining area transportation roadway II; 7 - sectional ventilation roadway;
- sectional transportation roadway II; 9 - filling face.
V. Embodiments • 3 ·
Hereunder the present invention will be further detailed in an embodiment with reference to Fig. 1.
As shown in Fig. 1, the synergistic mining method for underground mining, separation and filling of a close distance coal seam group in the present invention comprises the following steps:
a. designing a fully mechanized caving face 1 and designing a filling face 9 in an appropriate mining area according to the annual yield of gangue in the mining area, wherein the total thickness of gangue seams in the close distance coal seam group in the mining area is not more than 2.0m, the thickness of each gangue seam is not more than 1.0m; some measures may be taken to the gangue seam according to the actual conditions to increase the caving property; arranging a sectional transportation roadway II 8 and a sectional ventilation roadway 7 at both sides of the filling face 9 respectively; the location of the filling face 9 shall be selected in a mining area where conditions for fully mechanized caving and integrated coal and gangue mining in the close distance coal seam group are unavailable or in a mining area where the distance between the coal seams in the coal seam group is relatively great and the coal seam group can be normally mined upward/downward layer by layer or mined in combination; the annual gangue yield Q is calculated according to the formula Q = L-^d^p-^h-^m-^ + p2h2m2) + L2d2p1h3m1, where is the annual advance length of the fully mechanized caving face 1, dY is the width of the fully mechanized caving face 1, p^ is the apparent density of the coal, h± is the total thickness of the close distance coal seam group, ττΐγ is the primary separation rate of gangue from the raw coal, p2 is the apparent density of the gangue, h2 is the total thickness of the gangue seams, m2 is the primary separation rate of the gangue, L2 is the annual advance length of the filling face 9, d2 is the width of the filling face 9, and h3 is the mining height of the filling face 9; the parameter design of the filling face 9 is determined according to a formula Q = L2d2hcp2, wherein hc is the fillable height of the filling face 9;
b. designing the size of an underground coal gangue separation chamber 4 and designing an underground coal gangue separation system according to the annual yield of gangue in the mining area, wherein the underground coal gangue separation system comprises a sectional transportation roadway I 2 in the same direction as the fully mechanized caving face 1, the sectional transportation roadway I 2 is equipped with a coal gangue conveyor belt, the tail end of the sectional transportation roadway I 2 is connected with the underground coal gangue separation chamber 4 via a mining area transportation roadway I 3, wherein, the mining area transportation roadway I 3 is equipped with a coal gangue conveyor belt connected with the sectional transportation roadway I 2, the underground coal gangue separation chamber 4 is connected with the sectional ventilation roadway 7 via a gangue concentration roadway 5 arranged below the underground coal gangue separation chamber 4, a vertical channel is arranged between the underground coal gangue separation chamber 4 and the gangue concentration roadway 5, the gangue directly falls onto the gangue conveyor belt arranged in the gangue concentration roadway 5 by gravity, and the underground coal gangue separation chamber 4 is connected with the sectional transportation roadway II 8 via the mining area transportation roadway II 6, wherein the mining area transportation roadway II 6 and the sectional transportation roadway II 8 are equipped with a connected conveyor belt;
c. mining at the fully mechanized caving face 1, determining the mining height and caving height • 4 · of the coal mining machine according to the thickness of the close distance coal seam group and the thickness of the gangue-containing seam, and transporting the coal gangue produced in the mining process through the conveyor belt of the sectional transportation roadway I 2 to the mining area transportation roadway I 3;
d. transporting the coal gangue through the conveyor belt in the mining area transportation roadway I 3 into the underground coal gangue separation chamber 4 for coal gangue separation, controlling the obtained gangue to fall into the gangue concentration roadway 5 by gravity, and finally transporting the gangue to the sectional ventilation roadway 7;
e. filling and mining the filling face 9 with the coal gangue transported to the sectional ventilation roadway 7, determining the advance rate of the filling face 9 according to the requirement for the filling rate in the mine, transporting the coal gangue produced in the mining process at the filling face 9 through the sectional transportation roadway II 8 to the mining area transportation roadway II 6 and finally into the underground coal gangue separation chamber 4; then repeating step d;
f. repeating steps c, d and e, and so on, to accomplish the mining in the entire mining area.
Claims (5)
- Claims1. A synergistic mining method for underground mining, separation and filling for a close distance coal seam group, comprising the following steps:a. designing a fully mechanized caving face (1), designing a filling face (9) in an appropriate mining area according to the annual gangue yield in the mining area, and arranging a sectional transportation roadway II (8) and a sectional ventilation roadway (7) at both sides of the fdling face (9);b. designing the size of an underground coal gangue separation chamber (4) and designing an underground coal gangue separation system according to the annual yield of gangue in the mining area, wherein the underground coal gangue separation system comprises a sectional transportation roadway I (2) in the same direction as the fully mechanized caving face (1), the tail end of the sectional transportation roadway I (2) is connected with the underground coal gangue separation chamber (4) via a mining area transportation roadway I (3), the underground coal gangue separation chamber (4) is connected with the sectional ventilation roadway (7) via a gangue concentration roadway (5) arranged below the underground coal gangue separation chamber (4), and the underground coal gangue separation chamber (4) is connected with the sectional transportation roadway II (8) via the mining area transportation roadway II (6);c. mining at the fully mechanized caving face (1), determining the mining height and caving height of the coal mining machine according to the thickness of the close distance coal seam group and the thickness of the gangue-containing seam, and transporting the coal gangue produced in the mining process through the sectional transportation roadway I (2) to the mining area transportation roadway I (3);d. transporting the coal gangue through the mining area transportation roadway I (3) into the underground coal gangue separation chamber (4) for coal gangue separation, controlling the obtained gangue to fall into the gangue concentration roadway (5) by gravity, and finally transporting the gangue to the sectional ventilation roadway (7);e. filling and mining the filling face (9) with the coal gangue transported to the sectional ventilation roadway (7), determining the advance rate of the filling face (9) according to the requirement for the filling rate in the mine, transporting the coal gangue produced in the mining process at the filling face (9) through the sectional transportation roadway II (8) to the mining area transportation roadway II (6) and finally into the underground coal gangue separation chamber (4); then repeating step d;f. repeating steps c, d and e, and so on, to accomplish the mining in the entire mining area.
- 2. The synergistic mining method for underground mining, separation and filling for a close distance coal seam group according to claim 1, wherein, the location of the filling face (9) shall be selected in a mining area where conditions for fully mechanized caving and integrated coal iand gangue mining in the close distance coal seam group are unavailable or in a mining area where the distance between the coal seams in the coal seam group is relatively great and the coal seam group can be normally mined upward/downward layer by layer or mined in combination.
- 3. The synergistic mining method for underground mining, separation and filling for a close distance coal seam group according to claim 1, wherein: the annual gangue yield Q is calculated according to the formula Q = + p2^2m2) + ^2^2Pi^3mi, where is the annual advance length of the fully mechanized caving face (1), dY is the width of the fully mechanized caving face (1), pr is the apparent density of the coal, h± is the total thickness of the close distance coal seam group, ττΐγ is the primary separation rate of gangue from the raw coal, p2 is the apparent density of the gangue, h2 is the total thickness of the gangue seams, m2 is the primary separation rate of the gangue, L2 is the annual advance length of the filling face (9), d2 is the width of the filling face (9), and h3 is the mining height of the filling face (9).
- 4. The synergistic mining method for underground mining, separation and filling for a close distance coal seam group according to claim 1, wherein, the parameter design of the filling face (9) is determined according to a formula Q = L2d2hcp2, wherein hc is the fillable height of the filling face (9).
- 5. The synergistic mining method for underground mining, separation and filling for a close distance coal seam group according to claim 1, wherein, the total thickness of the gangue seams in the close distance coal seam group involved in the full-mechanized caving mining is not more than 2.0m, the thickness of each gangue seam is not more than 1.0m, and appropriate measures may be taken for the gangue seams according to the actual conditions to increase the caving property.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811128889.6 | 2018-09-27 | ||
| CN201811128889.6A CN109162714A (en) | 2018-09-27 | 2018-09-27 | Coal seam group near interval underground, which picks up, fills collaboration recovery method |
| PCT/CN2018/113556 WO2020062432A1 (en) | 2018-09-27 | 2018-11-02 | Underground mining, sorting, and filling coordinated mining method for close-range coal seam cluster |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2018413756A1 true AU2018413756A1 (en) | 2020-04-16 |
| AU2018413756B2 AU2018413756B2 (en) | 2021-05-06 |
Family
ID=64892528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2018413756A Active AU2018413756B2 (en) | 2018-09-27 | 2018-11-02 | Synergistic mining method for underground mining, separation and filling for a close distance coal seam group |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20210404337A1 (en) |
| CN (1) | CN109162714A (en) |
| AU (1) | AU2018413756B2 (en) |
| WO (1) | WO2020062432A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109838237B (en) * | 2019-04-15 | 2020-01-03 | 中国矿业大学 | Close-distance coal seam up-down successive-replacing collaborative mining method |
| CN110029995B (en) * | 2019-04-15 | 2020-05-12 | 中国矿业大学 | Close-distance coal seam up-down successive collaborative mining excavation and taking-over design method |
| CN109915144B (en) * | 2019-04-17 | 2020-04-28 | 中国矿业大学 | Large-dip-angle branched coal seam fully-mechanized caving-to-fully-mechanized mining continuous propelling mining method |
| CN110107298B (en) * | 2019-06-18 | 2024-06-18 | 河北工程大学 | Coal mining, selecting, filling and reserving integrated mining system |
| CN110298141B (en) * | 2019-07-19 | 2023-05-19 | 辽宁工程技术大学 | Underground chamber layout optimization design method for underground mining |
| CN112065393B (en) * | 2020-09-08 | 2022-06-28 | 安徽理工大学 | Underground coal gangue source reduction, selection and charging collaborative mining system |
| CN113250743A (en) * | 2021-05-31 | 2021-08-13 | 中煤能源研究院有限责任公司 | Coal mine underground working face mining, selecting and charging integrated system and using method |
| CN113338933A (en) * | 2021-06-30 | 2021-09-03 | 山西海源阳光科技有限公司 | Mining method for extremely-close coal seam |
| CN113565510B (en) * | 2021-07-05 | 2023-08-04 | 太原理工大学 | Ultra-thick coal seam fully mechanized filling mining method based on underground gangue pile |
| CN113565509B (en) * | 2021-07-05 | 2023-08-04 | 太原理工大学 | Fully-mechanized caving filling mining method for extra-thick coal seam based on underground gangue strips |
| CN113586054B (en) * | 2021-08-31 | 2023-08-25 | 新疆大学 | Method for mining strong and weak subareas of ultra-thick coal seam by filling up and layering |
| CN114151126A (en) * | 2021-10-27 | 2022-03-08 | 中煤科工开采研究院有限公司 | Stress control method for coal seam mining roadway under short distance |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2169264C2 (en) * | 1999-07-05 | 2001-06-20 | Атрушкевич Аркадий Анисимович | Method of preparation for and mining of steep and sloping coal seams |
| RU2260694C1 (en) * | 2004-04-26 | 2005-09-20 | Государственное образовательное учреждение высшего профессионального образования "Российский университет дружбы народов" (РУДН) | Method for multi-layer extraction of extremely massive, more than 20- 30 meters, bed of coal by slanting layers in ascending order with full backfilling of extracted space |
| CN101775985B (en) * | 2010-02-10 | 2012-04-18 | 东北大学 | Deeply buried iron mineral resource underground mining and concentrating integration system |
| CN102425431B (en) * | 2011-11-14 | 2014-01-15 | 新汶矿业集团有限责任公司 | Ultra-close coal layer mining roadway distributing method |
| CN104033153A (en) * | 2014-06-25 | 2014-09-10 | 中国矿业大学 | Coal mine underground mining, dress and filling integral method |
| CN104564072B (en) * | 2015-01-14 | 2017-01-18 | 中国矿业大学 | Complete non-coal-pillar continuous depressurized mining method for close-distance coal seam groups |
| CN105422097A (en) * | 2016-01-05 | 2016-03-23 | 淮南矿业(集团)有限责任公司 | Coal seam group mining method |
| CN106014423B (en) * | 2016-06-24 | 2018-05-11 | 西安科技大学 | The excavation and method for protecting support of a kind of shallow coal level lane |
-
2018
- 2018-09-27 CN CN201811128889.6A patent/CN109162714A/en active Pending
- 2018-11-02 AU AU2018413756A patent/AU2018413756B2/en active Active
- 2018-11-02 US US16/616,603 patent/US20210404337A1/en not_active Abandoned
- 2018-11-02 WO PCT/CN2018/113556 patent/WO2020062432A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020062432A1 (en) | 2020-04-02 |
| US20210404337A1 (en) | 2021-12-30 |
| AU2018413756B2 (en) | 2021-05-06 |
| CN109162714A (en) | 2019-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20210404337A1 (en) | Synergistic mining method for underground mining, separation and filling for a close distance coal seam group | |
| WO2017219970A1 (en) | Method for sorting and using coal/rock on coal-and-rock simultaneous-mining face | |
| CN104790956B (en) | It is remotely controlled roadway formula exploitation end and helps coal technique | |
| CN109488301A (en) | A kind of mine, which picks up, fills place's recovery method | |
| DE112015000180T5 (en) | mining methods | |
| CN109630121B (en) | Steering, developing and transporting system for strip mining area | |
| CN103480482B (en) | Flowing current separation process coal mine underground gangue dumping system | |
| CN109209379B (en) | Mine mining, selecting, filling and X mining method | |
| CN111828007A (en) | Stoping method for residual studs in underground mine goaf | |
| CN108941146A (en) | A kind of barren rock and crude tailings mixing stacked arrangement | |
| CN112796829A (en) | Underground original gangue filling system and method for caving area of fully mechanized caving face | |
| Dryzhenko et al. | Justification of parameters of building inclined trenches using belt conveyors | |
| CN110284883A (en) | Recovery method is filled by a kind of row of adopting, open coal mine end side | |
| CN101158285A (en) | Underground mining method of copper mine | |
| CN109184784B (en) | Fully-mechanized coal gangue synchronous filling system and method based on coal mining collapse degree reduction | |
| CN112576300A (en) | Intensive underground coal and gangue separation system and construction method | |
| Kamp | Backfilling on gold mines of the Gold Fields group | |
| CN113931630B (en) | Mechanized non-waste mining method for deep metal deposit | |
| CA3065719A1 (en) | Synergistic mining method for underground mining, separation and filling for a close distance coal seam group | |
| CN207420567U (en) | A kind of mining underground breaker | |
| Marovelli et al. | The mechanization of mining | |
| Ritchie et al. | An archaeologist's guide to mining terminology | |
| CN111878163A (en) | Mining, selecting and charging integrated waste rock filling system based on underground wind power waste rock selection | |
| CN208534537U (en) | A kind of device for removing coal slime in main slant | |
| Lawver et al. | New techniques in beneficiation of the Florida phosphates of the future |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) |