CN117514325A - Upward-route dry filling mining method applicable to pan area of gently-inclined thick and large ore body - Google Patents
Upward-route dry filling mining method applicable to pan area of gently-inclined thick and large ore body Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 238000005065 mining Methods 0.000 title claims abstract description 47
- 238000005520 cutting process Methods 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 8
- 238000005422 blasting Methods 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 239000010878 waste rock Substances 0.000 claims description 21
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 9
- 239000011707 mineral Substances 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 4
- 238000010009 beating Methods 0.000 claims description 3
- 238000005553 drilling Methods 0.000 claims description 3
- 230000000750 progressive effect Effects 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 abstract description 2
- 230000008901 benefit Effects 0.000 description 12
- 239000004575 stone Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002699 waste material Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 150000002739 metals Chemical class 0.000 description 1
- 230000004660 morphological change Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
The invention discloses a tray area upward approach dry filling mining method suitable for a gently inclined thick and large ore body, which belongs to the technical field of mining engineering and comprises the steps of dividing the ore body into a plurality of tray areas in a vertical trend, dividing the tray area into a plurality of layers along the vertical direction, dividing each layer into a plurality of stopes, and arranging an approach and ore pillars in the stopes at intervals in the vertical trend; a layered connecting channel and a segmented roadway are dug to an ore body by a mining inclined ramp, an ore pass is arranged to be connected with the segmented roadway, a layered connecting channel is dug to each layer of each disc area by the segmented roadway, and a cutting roadway is dug along a contact zone; adopting a mode of from bottom to top to conduct layered stoping, wherein each layered stoping is divided into two steps; immediately stoping the last layering and pressing the roof after the layering approach stoping and filling are finished; repeating the steps until the ore bodies in the tray area are completely recovered. The invention saves the cost of tailing cemented filling materials, preparation, transportation and the like, and reduces the ore depletion rate and loss rate.
Description
Technical Field
The invention discloses a tray upward-route dry filling mining method suitable for a gently-inclined thick and large ore body, and belongs to the technical field of mining engineering.
Background
Along with the development of filling materials and underground filling technologies, the filling mining method gets rid of the dilemma of low production efficiency and complex production process, has the advantages of strong capability of adapting to the morphological change of ore bodies, low mining loss rate and ore depletion rate, capability of effectively maintaining surrounding rock, slowing down the occurrence of ground pressure and the like, is suitable for mining rare metal or high-grade ore deposit, and is widely applied to mining. For mines where a filling station has not yet been constructed, a dry filling mining method is generally used for ground pressure management work. However, when mining a gently inclined thick and large ore body, the traditional upward layered dry filling mining method has the problems of low production efficiency, poor working environment, low ore recovery rate and the like, and severely restricts the safe, efficient and sustainable development of the mine. The reason for this can be mainly categorized into three reasons: (1) The traditional dry filling method stoping process generally does not realize mechanized mining, and the ore discharging mode is mainly carried by a scraper, so that the labor cost is higher and the stoping efficiency is low; (2) In the process of stoping the same layered ore, in order to avoid the dry filler from being mixed into adjacent stopes, a certain size of isolated ore pillars are usually required to be reserved between the adjacent stopes, so that loss and waste of mineral resources are caused, and sustainable development of mines is not facilitated; (3) During the recovery of the upper layered ore, the caving ore is liable to mix into the lower layered dry filler, resulting in an increase in the ore depletion rate. Although some mines adopt a concrete paving mode to isolate ores and waste stones, the construction process is complex and has high cost. Therefore, the method improves the production capacity of the upward horizontal layered dry filling method under the condition of the gently inclined thick and large ore body, reduces the loss rate and the depletion rate of the stope ore, and is a key technical problem which needs to be solved in the similar mining process at present.
Disclosure of Invention
The invention aims to provide a tray upward-route dry filling mining method suitable for a gently inclined thick and large ore body, which is used for solving the problems of low production capacity, high loss rate of stope ore and high depletion rate of the dry filling method in the prior art.
The upward-route dry filling mining method suitable for the pan area of the gently inclined thick and large ore body comprises the following steps:
s1, dividing a mineral aggregate into a plurality of disk areas in a vertical trend, dividing the disk areas into a plurality of layers in a vertical direction, dividing each layer into a plurality of stopes, and setting a route and a mineral pillar in the stopes at intervals in the vertical trend;
s2, digging layered connecting channels and segmented roadways to the ore body by using a mining standard slope, burdening each segmented roadway with a plurality of layered stopes, arranging an ore pass to be connected with the segmented roadway, digging a layered connecting channel to each layer of each disc area by using the segmented roadway, and digging a cutting roadway along a contact zone;
s3, carrying out layered stoping in a mode of from bottom to top, wherein each layered stoping is divided into two steps of stoping, one step of stoping the spaced ore pillars, and immediately filling the waste rock concrete after stoping is finished to form a waste rock concrete retaining wall; the two steps of stoping the separated access road, paving a steel plate cushion layer on the top of the access road in a mode of beating anchor rods, and immediately performing dry filling on the access road after stoping;
s4, immediately stoping the last layering after the layering approach stoping and filling are completed; when the last layered approach is recovered, the steel plate falls on the lower layered dry filling body, the ore is caving on the steel plate, the caving ore is conveyed to a cutting gallery through a scraper, and then conveyed to an ore drop shaft through a layered connecting channel through the cutting gallery;
s5, when stoping to the uppermost layering, caving surrounding rock of the upper cover top plate in a shallow hole blasting mode to realize roof connection of the dry type filling body, drilling an upward forward inclined parallel hole on the top plate by using a shallow hole drill before route stoping, and blasting roof connection after route filling is completed;
s6, repeating the steps S3-S5 until the ore bodies in the disc area are completely recovered.
Each layered approach and pillar placement position is vertically corresponding.
The waste rock concrete filling body for filling the ore pillar in each layer plays a supporting role in replacing the ore pillar, the goaf is safe and stable in the process of maintaining the route stoping, the waste rock and the tailings in the filling material occupy a relatively large proportion, and the concrete occupies a relatively small proportion, wherein the strength is not higher than 1: 8.
And backfilling the dry filling body to a goaf by adopting a scraper when each layer is filled in the road, wherein the filling body is from waste stones generated by a mine tunneling roadway, and the diameter of the maximum block is not more than 200-300 mm.
The stoping mode of the routes and the ore pillars in each layering is interval stoping, the number of the routes and the ore pillars stoped at the same time each time is 2-5, the two-step stoping is divided into two steps of stoping, one step of stoping is carried out, two steps of stoping are carried out, and horizontal blast holes and shallow hole ore dropping are carried out during stoping of the routes.
The height of the ore pillar at the access height is 3-5m, the span of the ore pillar is 2-3m, and the span of the access is 3-5m.
When the uppermost layer is filled, a gap exists between the dry type filling body of the lower layer and the progress top plate, a blasting free surface is provided, the distance between blast holes is larger than that of normal stope shallow hole blasting, the explosive loading quantity is smaller than that of normal stope shallow hole blasting, and the top plate can be broken down.
The layering contact ways of each layering are communicated in a staggered arrangement mode, the length changes along with the height of layering, the lower the layering is, the longer the layering contact way is, and the ore transportation safety is guaranteed.
Compared with the prior art, the invention has the following beneficial effects: the beneficial effects include:
(1) According to the method, a dry filling mining method is adopted, so that the filling cost is reduced, the rubble does not need to lift, the safety accidents in the transportation and lifting process are reduced, the pollution of underground gangue to the surface environment is eliminated, the local ecological environment is protected, and the green efficient mining of the mine is realized.
(2) The method reduces the exposed area of the top plate by adopting a mechanized plate area route stoping mode, ensures the safety of stopes and personnel equipment, improves stoping efficiency, and ensures safe, economical and efficient mining.
(3) The waste rock concrete retaining wall is formed by filling waste rock concrete into the ore pillars, so that the ore pillars can be replaced to play a supporting role, and the goaf is maintained to be safe and stable in the process of stoping. Meanwhile, mineral resource loss caused by the reserved ore pillar is avoided, filling cost can be saved, and mine benefit is improved.
(4) The steel plate cushion layer is paved on each layered access roof (except the uppermost layer) by adopting the anchor rods, so that on one hand, the roof can be temporarily supported, on the other hand, the effect of isolating the dry type filling body from ore can be achieved, the ore recovery rate is improved, the ore depletion rate is reduced, and the sustainable development of mines is facilitated.
(5) The top layer is constructed by blasting and roof-grafting, so that the roof-grafting rate of the filling body can be improved, the large-area collapse and collapse of an overlying strata are avoided, the construction operation is simple and convenient, and the mine economic benefit is improved on the premise of ensuring the safety.
Drawings
FIG. 1 is a schematic illustration of the above-described mechanized caving dry filling mining method layout for gently sloping thick and large ore bodies;
FIG. 2 is a schematic view of section I-I of FIG. 1;
FIG. 3 is a schematic view of section II-II of FIG. 1;
FIG. 4 is a schematic view of a method of laying steel sheet;
in the figure: 1-blasting roof-connected broken stones; 2-dry filling the access; 3-steel plate; 4-waste rock concrete retaining wall; 5-unexplored route; 6-cutting a gallery; 7-layering contact ways; 8-segmenting the roadway; 9-ore pass; 10-ramp; 11-segmenting the contact; 12-anchor rod; 13-capping space.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the present invention will be clearly and completely described below, and it is apparent that the described embodiments are 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.
The mechanized upward-route dry filling mining method suitable for the slowly-inclined thick and large ore body is suitable for the slowly-inclined thick and large ore body, projects such as a ramp 10, a subsection roadway 8 and the like are arranged in the early stage, the mechanized upward-route dry filling mining method suitable for the slowly-inclined thick and large ore body is arranged as shown in fig. 1, and two sections of the mechanized upward-route dry filling mining method are respectively shown in fig. 2 and 3.
In fig. 1, the device comprises a blasting roof-connected broken stone 1, a dry filling route 2, a steel plate cushion layer, a waste stone concrete retaining wall 4, an unexplored route 5 and a roof-pressing space 13; in fig. 2, the device comprises a cutting gallery 6, a layering connecting passage 7, a sectioning gallery 8, an ore pass 9, a ramp 10 and a sectioning connecting passage 11; the anchor rod 12 is included in fig. 4. The method comprises the following specific steps of:
s1, dividing a mineral aggregate into a plurality of disk areas in a vertical trend, dividing the disk areas into a plurality of layers in a vertical direction, dividing each layer into a plurality of stopes, and setting a route and a mineral pillar in the stopes at intervals in the vertical trend;
the arrangement positions of each layered access and each ore pillar are vertically corresponding, so that unified construction procedures are facilitated, and the stope safety and stability are maintained. The height of the approach (pillar height) in each of the layers is typically 3-5m. The span of the ore pillar is generally 2-3m, and the span of the route is generally 3-5m.
S2, excavating layered connecting channels 7 and segmented roadways 8 to ore bodies by using a mining standard slope 10, wherein each segmented roadway 8 is burdened with a plurality of layered stopes, ore pass 9 is arranged to be connected with the segmented roadway 8, a layered connecting channel 7 is excavated to each layer of each disc area by using the segmented roadway 8, and a cutting roadway 6 is excavated along a contact zone;
wherein, the layering contact way 7 of every layering of UNICOM adopts the staggered arrangement's mode, and its length is along with the height variation of layering, and the layering is lower, and layering contact way 7 length is longer to guarantee ore transportation safety.
S3, carrying out layered stoping in a mode of from bottom to top, wherein each layered stoping is divided into two steps of stoping, one step of stoping the spaced ore pillars, and immediately filling the waste rock concrete after stoping is finished to form a waste rock concrete retaining wall 4; the two steps of stoping the spaced access way, paving a steel plate cushion layer on the top of the access way in a mode of beating the anchor rods 12, and immediately performing dry filling on the access way after stoping on the premise of increasing the row spacing among the anchor rods 12 as much as possible under the premise of ensuring safety;
the stoping mode of the routes and the ore pillars in each layering is interval stoping, the number of the routes and the ore pillars stoped at the same time each time is 2-5, the two-step stoping is divided into two steps of stoping, one step of stoping is carried out, two steps of stoping are carried out, and horizontal blast holes and shallow hole ore dropping are carried out during stoping of the routes. .
When each layered ore pillar is stoped and filled, the waste rock concrete filling body filled with the ore pillar can replace the ore pillar to play a supporting role, the goaf is safe and stable in the process of stoping a maintenance route, the waste rock and the tailings in the filling material occupy larger proportion, and the concrete occupies smaller proportion, wherein the strength is not higher than 1: 8.
And backfilling the dry filling body to the goaf by adopting a scraper when each layer is filled in the route. Wherein the filling material comes from waste stones generated in a mine tunneling roadway, and the diameter of the maximum block is generally not more than 200-300 mm.
S4, immediately stoping the last layering after the layering approach stoping and filling are completed. When the last layered route is recovered, the steel plate 3 falls on the lower layered dry filler, and the ore falls on the steel plate 3. The caving ore is conveyed to the cutting gallery 6 by a scraper, and is conveyed to the ore pass 9 by the cutting gallery 6 through a layered connecting passage 7. The method comprises the steps of carrying out a first treatment on the surface of the
S5, caving surrounding rock of the upper cover top plate by adopting a shallow hole blasting mode when stoping to the uppermost layering so as to realize roof grafting of the dry type filling body, drilling an upward forward inclined parallel hole on the top plate by adopting a shallow hole drill before route stoping, and blasting roof grafting after route filling is completed;
when the uppermost layer is filled, a gap exists between the dry filling body of the lower layer and the progress top plate, and a blasting free surface is provided. The space between the blast holes is larger than that of the normal stope shallow hole blasting, the explosive loading quantity is smaller than that of the normal stope shallow hole blasting, and the roof can be broken down.
S6, repeating the steps S3-S5 until the ore body is completely recovered in the stage.
When the mechanized upward-facing dry filling mining method suitable for the gently inclined thick and large ore bodies is used for stoping the gently inclined thick and large ore bodies, the dry filling mining method is adopted, so that the filling cost is reduced, the rubble does not need to lift a well, the safety accidents in the transportation and lifting process are reduced, the pollution of underground gangue to the surface environment is eliminated, the local ecological environment is protected, and the green efficient mining of the mine is realized; by adopting a mechanized plate area route stoping mode, the exposed area of the top plate is reduced, the safety of stopes and personnel equipment is ensured, meanwhile, the stoping efficiency is improved, and the safe, economical and efficient mining is ensured; the waste rock concrete retaining wall 4 is formed by filling waste rock concrete into the ore pillars, so that the ore pillars can be replaced to play a supporting role, and the goaf is maintained to be safe and stable in the process of stoping. Meanwhile, mineral resource loss caused by the reserved ore pillar is avoided, filling cost can be saved, and mine benefit is improved; by paving the steel plate cushion layer on each layered access roof (except the uppermost one) through the anchor rods 12, on one hand, the roof can be temporarily supported, on the other hand, the effect of isolating the dry type filling body from ore can be achieved, the ore recovery rate is improved, the ore depletion rate is reduced, and the sustainable development of mines is facilitated; by adopting blasting roof-contacting construction at the uppermost layer, the roof-contacting rate of the filling body can be improved, so that large-area collapse and collapse of an overlying strata are avoided, the construction operation is simple and convenient, and the mine economic benefit is improved on the premise of ensuring the safety.
In order to further illustrate the beneficial effects of the upward-route dry-fill mining method applied to the mechanized pan section of a gently sloping thick and large ore body, the method is further described by taking the pan section 1 of a certain ore 5-101 ore body as an example.
The inclination angle of the ore 5-101 ore body is 7-15 degrees, the thickness of the ore body is 18-20 m, and metals reaching the exploitation grade are gold and copper, and the ore body is a gently inclined thick and large ore body. The original mining method adopted by the mine is an upward horizontal layered dry filling mining method, when the method is adopted, in order to ensure the stability of a roof in the mining process, the layered height is set to be 3m, the length of a mine room is 6m, permanent ore pillars with the length of 3m multiplied by 3m are reserved in the mine room, the proportion of the ore amount of the ore pillars is larger, and the ore loss is larger. The inclination angle of the No. 1 disc area to be mined is 8 degrees, the average thickness of the ore body is 18m, the running length is 61m, and the inclined length is 40m. The method is divided into two sections, wherein the height of one section is 9m, one section is divided into three layers, and the height of one layer is 3m. Each layered route and ore pillars are arranged in a staggered manner, the routes between the upper and lower layers are arranged corresponding to the ore pillars, each layer is divided into two stopes along the trend, 4 routes are arranged in stope 1, 4 ore pillars are arranged in stope 2, 4 routes are arranged in stope 2, 3 ore pillars are arranged in stope 2, the route size is 5m multiplied by 2.5m, the ore pillar size is 3m multiplied by 3m, and the lengths of the routes and the ore pillars are the trend length, namely 40m.
The economic benefits obtained when the upward horizontal layered dry filling mining method is adopted in combination with the comparative analysis of this embodiment, wherein the upward-going dry filling mining method applied to the mechanized tray area of the gently inclined thick and large ore body needs to consider the cost of the waste rock concrete retaining wall 4, the cost of the steel plate cushion layer laying, the cost of the top layered blasting roof-grafting and the benefit of the multi-produced ore.
Compared with the original mining method, 6 ore pillars can be mined in one layer in one disc area, the size of each ore pillar is 3m multiplied by 3m, and the length of each ore pillar is the inclined length of 40m. According to the density of ore bodies 2.316t/m 3 Calculating that one layer can produce more ore with the volume of 3m multiplied by 40m multiplied by 2.316t/m 3 X 6 = 5002.56t. According to the grade of 2.5g/t, 12506.4g of gold can be recovered, and according to the gold market price of 350 yuan/g, one layering can realize the benefit of 437.72 ten thousand yuan.
For the waste rock concrete retaining wall 4, it is necessary to use C40 concrete, 1:8, the tailing and the waste stone filling are combined, calculated according to the price of 300 yuan per ton, and the cost of water, broken stone and the like is considered, and the cost is about 100 yuan/m 3 Considering slurry preparation, transportation, equipment loss, power supply, water discharge and other factors, the expected cost is 40 yuan/m 3 Total 140 yuan/m 3 . According to 3m×3m×40m×7=2520m 3 The required filling material cost of a layered waste rock concrete retaining wall 4 is 35.28 ten thousand yuan.
For the laying cost of the steel sheet cushion layer, the route size is 40m×5m×2.5m. The number of the anchor rods 12 required for one route is 60 according to the row spacing between the anchor rods 12 of 2m multiplied by 1.5m, and the laying cost of one layered anchor rod 12 is 48 ten thousand yuan according to each 1000 yuan. The paved steel plate 3 is a wear-resistant steel plate according to 60 yuan/m 2 Calculating, wherein the cost of water, electricity, air supply, pipeline laying, transportation, equipment loss and the like is considered in the laying, and the cost is about 40 yuan/m 2 Totaling 100 yuan/m 2 One layered steel plate 3 is laid at a cost of 16 ten thousand yuan. The total cost of laying one layered steel sheet 3 was 64 ten thousand yuan, and the steel sheet 3 was laid as shown in fig. 4.
Calculating the cost required by the top-connection of the uppermost layered blasting, selecting the distance between blastholes to be 1.2m, and the diameter of the blastholes to be 40mm, wherein the total blasting top-connection cost is 60 yuan/m by considering factors such as blasting materials, blasting appliances, labor cost and the like 3 According to 5m×0.5m×40m×8=800 m 3 The cost required for the top-most layered blasting roof grafting is 4.8 ten thousand yuan.
In summary, when mining ore bodies using the present invention, one of the strata (except the uppermost strata) in the pan may receive more benefit: 437.72-35.28-64= 338.44 ten thousand yuan; the uppermost tier can obtain more benefits: 437.72-35.28-4.8= 407.24 ten thousand yuan. It can be seen that the method improves mine benefit on the premise of ensuring safe production.
The above embodiments are only for illustrating the technical aspects of the present invention, not for limiting the same, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified or some or all of the technical features may be replaced with other technical solutions, which do not depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The upward-route dry-filling mining method suitable for the pan area of the gently inclined thick and large ore body is characterized by comprising the following steps of:
s1, dividing a mineral aggregate into a plurality of disk areas in a vertical trend, dividing the disk areas into a plurality of layers in a vertical direction, dividing each layer into a plurality of stopes, and setting a route and a mineral pillar in the stopes at intervals in the vertical trend;
s2, digging layered connecting channels and segmented roadways to the ore body by using a mining standard slope, burdening each segmented roadway with a plurality of layered stopes, arranging an ore pass to be connected with the segmented roadway, digging a layered connecting channel to each layer of each disc area by using the segmented roadway, and digging a cutting roadway along a contact zone;
s3, carrying out layered stoping in a mode of from bottom to top, wherein each layered stoping is divided into two steps of stoping, one step of stoping the spaced ore pillars, and immediately filling the waste rock concrete after stoping is finished to form a waste rock concrete retaining wall; the two steps of stoping the separated access road, paving a steel plate cushion layer on the top of the access road in a mode of beating anchor rods, and immediately performing dry filling on the access road after stoping;
s4, immediately stoping the last layering after the layering approach stoping and filling are completed; when the last layered approach is recovered, the steel plate falls on the lower layered dry filling body, the ore is caving on the steel plate, the caving ore is conveyed to a cutting gallery through a scraper, and then conveyed to an ore drop shaft through a layered connecting channel through the cutting gallery;
s5, when stoping to the uppermost layering, caving surrounding rock of the upper cover top plate in a shallow hole blasting mode to realize roof connection of the dry type filling body, drilling an upward forward inclined parallel hole on the top plate by using a shallow hole drill before route stoping, and blasting roof connection after route filling is completed;
s6, repeating the steps S3-S5 until the ore bodies in the disc area are completely recovered.
2. The above-pan section dry-fill mining method for gently sloping thick and large ore bodies according to claim 1, wherein each of the layered route and pillar placement positions is vertically corresponding.
3. The upward-facing dry-type filling mining method for a pan section of a gently inclined thick and large ore body according to claim 1, wherein the waste rock concrete filling body for filling ore pillars in each layer plays a supporting role in place of the ore pillars, the goaf is maintained safely and stably in the process of stoping the approach, the ratio of waste rock to tailings in the filling material is large, the ratio of concrete is small, and the strength is not higher than 1: 8.
4. The above-pan section dry-fill mining method for gently sloping thick and large ore bodies according to claim 1, wherein each layered fill route is backfilled to the goaf with a scraper, wherein the fill is from waste rock generated in the mine tunnel, and the diameter of the maximum block is not more than 200-300 mm.
5. The method for dry-type filling mining on upward routes in a tray area suitable for gently inclined thick and large ore bodies according to claim 1, wherein the stoping mode of the routes and ore pillars in each layer is interval stoping, the number of the routes and the ore pillars stoped simultaneously each time is 2-5, and the method is divided into two steps of stoping, one step of stoping, two steps of stoping, horizontal blast holes are drilled during stoping, and shallow hole ore dropping is carried out.
6. The method of claim 1, wherein the height of the pillar is 3-5m, the span of the pillar is 2-3m, and the span of the route is 3-5m.
7. The upward-facing dry-fill mining method for gently sloping thick and large ore bodies according to claim 1, wherein a gap exists between the lower layered dry-fill body and the progressive roof during the uppermost layered filling, providing a free surface for blasting, a larger hole spacing than normal pit shallow hole blasting, a smaller charge than normal pit shallow hole blasting, and roof collapse.
8. The upward-route dry-filling mining method suitable for the pan area of the gently inclined thick and large ore body according to claim 1, wherein the layered connecting channels communicated with each layered adopt a staggered arrangement mode, the length changes along with the height of the layered, the lower the layered, the longer the layered connecting channel length, and the ore transportation safety is ensured.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117722181A (en) * | 2024-02-07 | 2024-03-19 | 贵州息烽磷矿有限责任公司 | Method and system for mining steep-inclined thick and large ore body protection column |
| CN117722181B (en) * | 2024-02-07 | 2024-04-26 | 贵州息烽磷矿有限责任公司 | Method and system for mining steep-inclined thick and large ore body protection column |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117722181A (en) * | 2024-02-07 | 2024-03-19 | 贵州息烽磷矿有限责任公司 | Method and system for mining steep-inclined thick and large ore body protection column |
| CN117722181B (en) * | 2024-02-07 | 2024-04-26 | 贵州息烽磷矿有限责任公司 | Method and system for mining steep-inclined thick and large ore body protection column |
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