CN117449856A - Method for filling, roof protecting and displacement mining of bauxite under coal by lane - Google Patents
Method for filling, roof protecting and displacement mining of bauxite under coal by lane Download PDFInfo
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- CN117449856A CN117449856A CN202311680665.7A CN202311680665A CN117449856A CN 117449856 A CN117449856 A CN 117449856A CN 202311680665 A CN202311680665 A CN 202311680665A CN 117449856 A CN117449856 A CN 117449856A
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- 238000005065 mining Methods 0.000 title claims abstract description 125
- 229910001570 bauxite Inorganic materials 0.000 title claims abstract description 69
- 239000003245 coal Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 11
- 239000002002 slurry Substances 0.000 claims abstract description 35
- 239000011435 rock Substances 0.000 claims abstract description 16
- 238000000605 extraction Methods 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims description 15
- 239000011440 grout Substances 0.000 claims description 12
- 238000005422 blasting Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 239000002699 waste material Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000005429 filling process Methods 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 239000010878 waste rock Substances 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000032258 transport Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims 1
- 230000035515 penetration Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 238000011084 recovery Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002341 toxic gas Substances 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
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
-
- 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
- E21F15/08—Filling-up hydraulically or pneumatically
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Remote Sensing (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a method for filling, roof protecting and displacement exploitation of bauxite lane by lane under coal, which comprises the steps of dividing the exploitation lane, determining the exploitation and filling sequence of each exploitation lane, building a lower slurry stopping wall, paving a pipeline, stacking gangue, building an upper slurry stopping wall, filling, roof grafting, sequentially recovering ore pillars and the like; the invention can effectively control the rock stratum activity after bauxite is mined, ensure the continuity of the overlying coal layer and realize the protective mining of the underlying coal layer by the bauxite under the coal. The invention can effectively protect the roof in time after filling, and the filling body and the original legacy ore pillars can form a new coupling bearing system to jointly bear the load of an overburden layer and the load of mining disturbance, thereby improving the overall stability of the stope and solving the technical problem of weak direct roof control of conventional bauxite. The invention can fully recycle bauxite resources, greatly improve bauxite extraction rate, prolong mine service life, and has low filling cost and remarkable overall technical and economic benefits.
Description
Technical Field
The invention relates to the technical field of mining, in particular to a method for mining bauxite by filling roof protection and replacement in a lane-by-lane manner.
Background
In mountain western, henan, guizhou and other places in China, the carboloy deposited bauxite and the binary coal field are in close space symbiotic, the coal bauxite resource reserves are extremely rich, the occurrence form is aluminum under the coal, the deposit type is deposited bauxite, the undercoal bauxite accounts for more than 50% of the national bauxite reserves according to statistics, and the resource exploration potential is huge. In recent years, shallow surface bauxite resources in China are gradually depleted, and underground bauxite, particularly coal-to-coal aluminum exploitation, becomes a development trend and a necessary choice for aluminum resource development.
The coals bauxite and the coal seam are superposed, the occurrence state and the exploitation method are greatly different, and the rock stratum activities exploited by the coals bauxite and the coal seam affect each other to be exploited normally. For example: when coal is firstly mined and then aluminum is mined, the cracks of the bottom plate rock layer of the coal bed develop, roof cracks of a stope are communicated with the cracks of the bottom plate rock layer of the coal bed when later bauxite is mined, toxic gas and water in a goaf of the coal bed can be transferred to a bauxite stope, so that the difficulty of production management is increased, and even water bursting disaster is caused; when aluminum is firstly mined and then coal is mined, an overlying strata of bauxite collapses, so that a step type subsidence is formed in the coal bed, the continuity of the coal bed is damaged, and the normal mining of the coal bed is affected. Therefore, one core problem of realizing coal-aluminum co-mining is control of the movement of rock strata between coal-aluminum layers, and normal mining of both coal beds and bauxite is guaranteed.
Filling mining is a common method in well engineering mining and is widely applied to aspects of preventing earth surface subsidence, protecting surrounding rock stability of stopes and the like. The current roadway filling methods comprise an open filling method, a full-bag filling method, a mixed filling method, a segmented blocking filling method and the like, and the filling materials comprise dry filling materials, water sand filling materials, cemented filling materials and the like. Filling mining is often used for mining and recovery of ore pillars, filling the mined ore room to form new artificial ore pillars, supporting roof plates instead of the original ore pillars, and then mining the original ore pillars. The conventional non-coal mine filling method has high investment and large floor area of ground equipment. The lane-by-lane filling of the high-water material has the advantages of small initial investment, simple process, high recovery rate of ore pillars, proper cost and early strength of filling bodies.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide a method for filling and roof protection and displacement exploitation of the undermining bauxite lane by lane.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a method for filling, roof protection and displacement mining of bauxite lane by lane under coal, which comprises the following steps:
s1: dividing a mining roadway; dividing each ore pillar into a plurality of mining roadways according to the actual size of the bauxite pillar, and reserving spacing ore pillars with a certain width between the mining roadways so as to reduce the damage of blasting to a filling body in the process of mining adjacent roadways;
s2: determining the mining and filling sequence of each mining lane; firstly, taking original roadways on two sides of each bauxite column as roadways of a first filling operation so as to effectively support a top plate; after filling is completed and maintained for a period of time, mining and filling operations are sequentially carried out on the divided mining roadways; selecting one mining lane from each bauxite pillar as a lane of a first mining operation, and selecting one mining lane from the rest mining lanes in each bauxite pillar as a lane of a second mining operation until all mining lanes are distributed;
s3: filling the original roadway; adopting foam bricks to build a lower grout stopping wall with the thickness of 240mm at the lower part of the original roadway, and spraying concrete to perform leakage-proof treatment after the grout stopping wall is built;
s4: laying a pipeline, stacking gangue, and building a slurry stopping wall; arranging a plurality of filling pipes in the filling working surface, and arranging a filling pipe at the top part of the filling working surface towards the outer side of the filling lower grout stopping wall for judging the filling process according to the grout reversing condition; piling waste gangue in a goaf, backfilling the goaf, and then constructing an upper slurry stopping wall on the other side of a filling working surface for constructing a lower slurry stopping wall;
s5: filling and roof grafting; filling slurry into the filling working surface, judging the filling process through the slurry returning phenomenon of the slurry returning pipe, and stopping filling when the slurry returning of the slurry returning pipe occurs;
s6: sequentially recycling ore pillars; after the filling body is maintained for a period of time, recycling the ore pillar from the position opening parallel to the filling body;
s7: repeating the steps S3-S6, and carrying out mining and filling operation on each bauxite column lane by lane according to batches, so as to finally realize replacement mining of the bauxite columns and the filling bodies.
Preferably, in step S1, in order to increase the mining efficiency and ore mining rate and provide enough working space for the mining and transportation equipment, the width of the mining roadway should be above 3m, but from the standpoint of surrounding rock control, in order to reduce the roof subsidence of the mining roadway before filling and ensure the stability of the surrounding rock, the width of the mining roadway should not be greater than 5m, and therefore, the width of the mining roadway is set between 3m and 5m.
Preferably, in step S1, in order to increase the ore extraction rate, the left ore pillar should be as small as possible, but at the same time, in order to make the ore pillar have a certain bearing capacity and stability, the width of the ore pillar cannot be too small, so that the width range is set to 1 m-3 m, and the specific width value is comprehensively determined according to the on-site bauxite ore body strength, crack development and exploitation experience conditions.
Preferably, in step S2, the filling operation is performed immediately after the mining of each mining lane is completed, and at most one mining lane can perform the mining operation in each bauxite pillar so as to avoid roof collapse caused by overlarge exposed area of the roof due to simultaneous mining of adjacent mining lanes.
Preferably, in the step S4, three filling pipes (two waist filling pipelines 14; one top filling pipeline 15, with an inner diameter phi of 75 mm) are arranged inside the filling working surface, and the filling pipes are provided with a pair of liquid penetrating holes with a diameter of 20mm at intervals of 1 m;
preferably, in step S4, the worker transports the waste gangue (gangue, loess, etc.) down the well by transporting the mine car, piles the waste gangue in the goaf by adopting the gangue thrower, backfills the goaf, and the waste gangue backfill rate is at least 80%.
Preferably, in step S5, the corresponding water and the filling material are added into the stirring barrels a and b respectively and stirred for at least 5 minutes; the slurry is uniformly stirred, pressurized by adopting a double-liquid grouting pump, conveyed to the outside of a filling point through a double-pass high-pressure rubber pipe (pipe diameter is 32mm, compressive strength is not lower than 12 MPa), mixed through a connecting tee device, filled into a roadway, and the filling progress is judged through the slurry returning phenomenon of a slurry returning pipe, and the stirring barrel is cleaned after the filling is finished.
Preferably, in step S6, after the filler is cured for 7 days, the blasting hammer is adopted to fall the ore and the blasting is adopted to fall the ore from the position opening parallel to the filler, the hard rock area is subjected to the blasting and the ore falling, if necessary, the temporary support is carried out according to the on-site situation, the blasting hammer is small in ore falling disturbance, but the ore falling efficiency is low, and especially the blasting hammer is aimed at the hard rock area; in comparison, the blasting ore-falling has high mining efficiency although the disturbance is large.
The invention has the beneficial effects that:
(1) The invention can effectively control the rock stratum activity after bauxite is mined, ensure the continuity of the overlying coal layer and realize the protective mining of the underlying coal layer by the bauxite under the coal.
(2) The invention can effectively protect the roof in time after filling, and the filling body and the original legacy ore pillars can form a new coupling bearing system to jointly bear the load of an overburden layer and the load of mining disturbance, thereby improving the overall stability of the stope and solving the technical problem of weak direct roof control of conventional bauxite.
(3) The invention can fully recycle bauxite resources, greatly improve bauxite extraction rate, prolong mine service life, and has low filling cost and remarkable overall technical and economic benefits.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a lane-by-lane filling roof protection and displacement mining process of bauxite under coal;
fig. 2 is a layout of a filling pipe provided by the present invention.
Reference numerals illustrate:
1-bauxite column; 2-the original roadway; 3-spacing ore pillars; 4-first drift collection; 5-mining lane II; 6-mining lane III; 7-a lower grout stopping wall; 8-waste gangue; 9-sizing the wall; 10-cementing filler; 11-mining roadway mining; 12-a first material stirring barrel; 13-material B stirring barrel; 14-waist filling pipeline; 15-top fill line; 16-a reverse slurry pipe.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Taking mountain-western bauxite as an example, the ore body is of a monoclinic structure inclined about 310 degrees in the south-west direction, the average inclination angle is 8 degrees, the average burial depth is 110m, the average thickness is 2m, and the ore body belongs to a slowly-inclined medium-thickness ore body. Bauxite is gray, clastic and blocky, compact and hard in texture, and the top plate is soft rock such as claystone, so that the stability is poor. The ore is mined by adopting a room and pillar mining method, and bauxite with the thickness of about 0.5m is reserved on a roof to serve as a top protection layer so as to prevent the roof from collapsing.
Firstly, cutting a stope into quadrangular ore pillars with side lengths of 10-20 m by using a tunnel, wherein the peripheral tunnels of the ore pillars are mutually communicated, and the section of the tunnel is 4.0m multiplied by 2.7m. And then adopting a re-pillar cutting method to perform stoping in part of the area according to the conditions of bauxite grade, stable top plate and the like of the stope, and keeping the point pillar to support the top plate. The original room-pillar mining method has the advantages of large ore pillar loss, low recovery rate and less than 50 percent of mining rate. Instability of the point column in the goaf can occur after a long time, and the overlying strata can collapse. Therefore, the lane-by-lane filling roof protection and displacement mining method for the undermining bauxite can effectively control the rock stratum activity after the bauxite is mined, ensure the continuity of the overlying coal layer and realize the protective mining of the undermining bauxite on the overlying coal layer; the roof can be effectively protected in time after filling, the overall stability of a stope is improved, and the technical problem of direct roof control of weak conventional bauxite can be solved; and the bauxite extraction rate can be greatly improved.
Referring to fig. 1-2, the embodiment provides a method for filling and roof protection and displacement mining of bauxite under coal lane by lane, which comprises the following steps:
s1: dividing a mining roadway; the actual size of the bauxite pillar 1 is 21m multiplied by 21m, the mining lane width is comprehensively determined to be 5m according to the conditions of on-site bauxite body strength, crack development, mining experience and the like, the spacing pillar width is 1.5m, and finally the bauxite pillar 1 is divided into three mining lanes, namely a first mining lane 4, a second mining lane 5, a third mining lane 6 and four spacing pillars 3.
S2: determining the mining and filling sequence of each mining lane; in order to ensure the operation safety during the first mining roadway exploitation, the original roadway 2 on the two sides of the bauxite pillar 1 is firstly used as the roadway of the first filling operation so as to effectively support the top plate; after the original roadway 2 is filled and maintained for 7 days, three mining roadways are sequentially subjected to mining and filling operation from left to right, a first mining roadway 4 is a roadway of a first mining operation, a second mining roadway 5 is a roadway of a second mining operation, and a third mining roadway 6 is a roadway of a third mining operation.
And filling each batch of mining lane immediately after the mining is finished and sequentially carrying out the mining operation of the next batch of mining lane after the maintenance period is reached, namely, the first mining lane 4 is a lane of the second batch of filling operation, the second mining lane 5 is a lane of the third batch of filling operation, and the third mining lane 6 is a lane of the fourth batch of filling operation.
Then filling the original roadway 2, which comprises the following specific steps:
s4: building a lower grout stopping wall; and (3) constructing a lower grout stop wall 7 with the thickness of 240mm at the lower part of the roadway by adopting foam bricks, and spraying concrete for leakage prevention treatment after the lower grout stop wall 7 is constructed.
S5: laying a pipeline, stacking gangue, and building a slurry stopping wall; to ensure the filling effect, three filling pipes are arranged inside the filling working surface, and comprise two waist filling pipelines 14; a top filling pipeline 15 with the inner diameter of phi 75mm, a pair of through-leakage holes with the diameter of 20mm are formed in the filling pipeline every 1m, a shorter filling reverse grouting pipe 16 is arranged at the top and faces the outer side of the filling retaining wall, and the filling process is judged according to the reverse grouting condition;
the worker transports the waste rock 8 into the well through the transportation mine car, piles up the waste rock in the goaf by adopting the waste rock throwing machine, backfills the goaf as much as possible, the backfill rate of the waste rock 8 reaches 80%, and then builds a slurry stopping wall 9 on the other side of the filling working surface for building the slurry stopping wall.
S6: filling and roof grafting; preparing a first stirring barrel 12 and a second stirring barrel 13, respectively adding water and filling materials which are equivalent to each other into the first stirring barrel 12 and the second stirring barrel 13, and stirring for at least 5 minutes; after the slurry is uniformly stirred, the slurry is pressurized by adopting a double-liquid grouting pump, is conveyed to the outside of a filling point through a double-pass high-pressure rubber pipe (the pipe diameter is 32mm, and the compressive strength is not lower than 12 MPa), is mixed through a connecting tee device, is filled into a roadway to form a cementing filling body 10, and after the slurry returning of a slurry reversing pipe 16, the filling is finished, and a first stirring barrel 12 and a second stirring barrel 13 are cleaned.
After the filling body is maintained for 7 days, the mining and the mining 11 are sequentially carried out from left to right, and the bauxite pillar 1 is recovered, and the concrete steps are as follows:
s8: and 4, carrying out mining operation of the mining lane I, and repeating S4-S6 to carry out filling operation after the mining is finished.
S9: and (5) carrying out mining operation of a mining lane II, and repeating S4-S6 to carry out filling operation after the mining is finished.
S10: and (3) carrying out mining operation of the mining lane III 6, and repeating S4-S6 to carry out filling operation after the mining is finished.
S11: and (3) carrying out mining and filling operation on the bauxite columns lane by lane according to batches, and finally realizing replacement mining of the bauxite columns and the filling body.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. The method for filling, roof protection and displacement exploitation of the undermining bauxite lane by lane is characterized by comprising the following steps of:
s1: dividing a mining roadway; dividing each ore pillar into a plurality of mining roadways according to the actual size of the bauxite pillar, and reserving spacing ore pillars with a certain width between the mining roadways so as to reduce the damage of blasting to a filling body in the process of mining adjacent roadways;
s2: determining the mining and filling sequence of each mining lane; firstly, taking original roadways on two sides of each bauxite column as roadways for a first filling operation; after filling is completed and maintained for a period of time, mining and filling operations are sequentially carried out on the divided mining roadways;
s3: filling the original roadway; adopting foam bricks to build a lower grout stopping wall at the lower part of the original roadway, and spraying concrete to perform leakage-proof treatment after the grout stopping wall is built;
s4: laying a pipeline, stacking gangue, and building a slurry stopping wall; arranging a plurality of filling pipes in the filling working surface, and arranging a filling pipe at the top part of the filling working surface towards the outer side of the filling lower grout stopping wall for judging the filling process according to the grout reversing condition; piling waste gangue in a goaf, backfilling the goaf, and then constructing an upper slurry stopping wall on the other side of a filling working surface for constructing a lower slurry stopping wall;
s5: filling and roof grafting; filling slurry into the filling working surface, judging the filling process through the slurry returning phenomenon of the slurry returning pipe, and stopping filling when the slurry returning of the slurry returning pipe occurs;
s6: sequentially recycling ore pillars; after the filling body is maintained for a period of time, recycling the ore pillar from the position opening parallel to the filling body;
s7: repeating the steps S3-S6, and carrying out mining and filling operation on each bauxite column lane by lane according to batches, so as to finally realize replacement mining of the bauxite columns and the filling bodies.
2. The method of filling, roof protection and replacement mining under coal as claimed in claim 1, wherein in step S1, in order to increase mining efficiency and ore mining rate, and provide sufficient working space for mining and transportation equipment, the width of the mining roadway is 3m or more, but from the standpoint of surrounding rock control, in order to reduce roof subsidence before filling of the mining roadway and ensure surrounding rock stability, the width of the mining roadway is not more than 5m, and thus the mining roadway width is set to 3m to 5m.
3. The method for lane-by-lane filling, roof protection and replacement mining of undermining bauxite as claimed in claim 1, wherein in step S1, in order to increase ore extraction rate, a pillar is left to be as small as possible, but at the same time, in order to make the pillar have a certain bearing capacity and stability, the width of the pillar cannot be too small, so that the width range is set to be 1-3 m, and the specific width value is comprehensively determined according to the on-site bauxite ore body strength, crack development and mining experience conditions.
4. The method for filling, roof protection and replacement mining of undermining bauxite lane by lane as claimed in claim 1, wherein in the step S2, filling operation is performed immediately after each mining lane is completed, and at most one mining lane in each bauxite pillar can perform mining operation to avoid roof fall caused by overlarge exposed area of roof due to simultaneous mining of adjacent mining lanes.
5. The method for lane-by-lane filling, roof protection and replacement mining of undermining bauxite as claimed in claim 1, wherein in the step S4, three filling pipes are arranged in the filling working face, two waist filling pipelines and a top filling pipeline, and a plurality of liquid penetration holes are formed in the filling pipes.
6. The method for entry-by-entry filling, roof protection and displacement mining of undermining bauxite as set forth in claim 1, wherein in step S4, a worker transports waste gangue down the well through a transportation mine car, piles the waste gangue in a goaf by using a waste rock thrower, backfills the goaf, and the waste gangue backfill rate is at least 80%.
7. The method for filling, roof protection and displacement exploitation of bauxite lane by lane in coal as claimed in claim 1, wherein in step S5, water and filling materials corresponding to the same amount are respectively added into a stirring barrel a and a stirring barrel b and stirred for at least 5 minutes; and after the slurry is uniformly stirred, pressurizing the slurry by adopting a double-liquid grouting pump, conveying the slurry to the outside of a filling point through a double-pass high-pressure rubber pipe, filling the slurry into a roadway, judging the filling process through the slurry returning phenomenon of a slurry reversing pipe, and cleaning a first stirring barrel and a second stirring barrel after the filling is finished.
8. The method for lane-by-lane filling, roof protection and replacement mining of undermining bauxite as claimed in claim 1, wherein in step S6, after the filler is cured for 7 days, blasting hammer ore dropping and blasting ore dropping are adopted from a position opening parallel to the filler, and a hard rock zone adopts blasting ore dropping, and temporary support is carried out according to the site situation if necessary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311680665.7A CN117449856A (en) | 2023-12-08 | 2023-12-08 | Method for filling, roof protecting and displacement mining of bauxite under coal by lane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311680665.7A CN117449856A (en) | 2023-12-08 | 2023-12-08 | Method for filling, roof protecting and displacement mining of bauxite under coal by lane |
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| CN117449856A true CN117449856A (en) | 2024-01-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118309428A (en) * | 2024-06-11 | 2024-07-09 | 太原理工大学 | Structure and method for recycling ore pillar from bauxite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118309428A (en) * | 2024-06-11 | 2024-07-09 | 太原理工大学 | Structure and method for recycling ore pillar from bauxite |
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