CN113530542A - Thick ore body wedge-shaped top column subsection rock drilling stage open stope subsequent filling mining method - Google Patents
Thick ore body wedge-shaped top column subsection rock drilling stage open stope subsequent filling mining method Download PDFInfo
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- CN113530542A CN113530542A CN202110887749.2A CN202110887749A CN113530542A CN 113530542 A CN113530542 A CN 113530542A CN 202110887749 A CN202110887749 A CN 202110887749A CN 113530542 A CN113530542 A CN 113530542A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000005065 mining Methods 0.000 title claims abstract description 29
- 238000005553 drilling Methods 0.000 title claims abstract description 24
- 239000011435 rock Substances 0.000 title claims abstract description 21
- 238000005520 cutting process Methods 0.000 claims abstract description 14
- 238000005422 blasting Methods 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
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- 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
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- 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
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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Abstract
The invention discloses an open stope subsequent filling mining method in a wedge-shaped top column subsection rock drilling stage of a thick and large ore body, which is characterized in that a stope is arranged perpendicular to the trend of the ore body, a stope in one step and a stope in two steps are arranged at intervals, the stope in one step is mined and a goaf is filled, and then the stope in two steps is stoped and the goaf is filled; the method comprises the following steps that firstly, during stope stoping of a stope, the bottom of a deep hole blast hole in a positive row and a deep hole blast hole in a positive row of the uppermost subsection are gradually reduced row by taking the position of a cutting groove as a vertex, and a wedge-shaped top pillar is formed at the upper part while stoping blasting; and during stoping of the stope in the two steps, performing retreating type stoping from the upper disc to the lower disc, performing stepped type stoping blasting on the upper section medium-length hole in advance of the lower section medium-length hole by a certain row distance, and simultaneously performing stoping on each section. The invention has the advantages of simple stope filling and roof connecting process, guaranteed roof connecting quality, high roof connecting rate, capability of effectively improving stope stoping safety of a two-step stope and the like.
Description
Technical Field
The invention belongs to the field of underground mining, and particularly relates to an open stope subsequent filling mining method for a wedge-shaped top pillar sublevel drilling stage of a thick and large ore body, which is particularly suitable for stoping of the thick and large ore body with medium stability and above of ore rocks.
Background
The open stope subsequent filling mining method in the subsection rock drilling stage is one of the main mining methods for the stoping of thick and large ore bodies with stable ore rocks. The method comprises the steps of dividing an ore body into sections, constructing upward sector-shaped medium-length holes in a sectional rock drilling roadway, withdrawing each section from an upper disc to a lower disc simultaneously, blasting the upper section in a step-withdrawing manner in advance of the lower section for a certain row distance, and discharging the caving ore mainly from a bottom ore removal structure. The method has the advantages of large production capacity of the stope, high efficiency, low cost and the like, thereby having wide application. For thick and large ore bodies, in order to reduce the loss of ore pillars and reduce the filling cost, the stoping is generally carried out in two steps, high-strength filling bodies are adopted for filling after the stoping of a stope in one step is finished, and then the stope in the two steps is stoped. The filling body of the stope in the first step is used as an artificial ore pillar in the stope in the second step. In order to ensure the safety of the two-step stoping operation, the stope in one step needs to ensure the top contact of filling, and the top contact of filling in the stope is a common problem in the prior mine. In order to ensure stope filling and roof contacting, mine engineering technicians currently adopt a plurality of means including: the method comprises the steps of multi-point blanking, forced roof-contacting by pumping, expansion roof-contacting and the like, but the filling roof-contacting rate and the roof-contacting quality cannot be effectively ensured in practice, so that a stope caving site is frequently generated during stope stoping in the two steps, the ore loss and dilution rate is increased, and the stope stoping safety risk is increased.
Therefore, the invention provides an open stope subsequent filling mining method for a wedge-shaped top column sectional rock drilling stage of a thick and large ore body, and aims to solve the problems that in the prior art, the open stope subsequent filling mining method for the sectional rock drilling stage has low filling and roof-connecting quality in one step, and the collapse is caused in the stope mining process of a two step stope.
Disclosure of Invention
In order to solve the technical problem, the invention provides an open stope subsequent filling mining method in a wedge-shaped top column subsection rock drilling stage of a thick and large ore body, which comprises the following steps:
the utility model provides a thick and big ore body wedge-shaped fore-set sublevel rock drilling stage open stoping afterwards fills mining method which characterized in that: stopes are arranged perpendicular to the trend of the ore body, the stopes in the first step and the stopes in the second step are arranged at intervals, the stopes in the first step are mined and the goaf is filled, stope mining in the second step is started after the strength of the filling body in the stope in the first step reaches the design index, and low-strength filling bodies are used for filling after stope mining in the stope in the second step is finished.
Furthermore, during stope stoping in the first step, the cutting grooves are arranged at the junction of the upper wall rock, forward-arranged blast holes of each section are blasted in a retreating mode by taking the cutting grooves as free surfaces and compensating spaces, the upper section is in a stepped retreating mode in advance of the lower section, the bottoms of the deep-hole blast holes in the forward-arranged section of the uppermost section are gradually arranged and reduced by taking the positions of the cutting grooves as vertexes, wedge-shaped top pillars are formed at the upper parts during stope blasting, and caving ore is shoveled out from a bottom ore discharging structure by adopting a shoveling and conveying machine; and during stoping of the stope in the two steps, performing retreating type stoping from the upper disc to the lower disc, performing stepped stoping blasting on the upper section medium-length hole in advance of the lower section medium-length hole at a certain row spacing, performing stoping on each section simultaneously, and shoveling out stoped and collapsed ores from the bottom ore removal structure by using a scraper.
Furthermore, the filling return air raise of the stope in the step is arranged at the upper part of the uppermost segmented cutting groove and is connected with the filling return air gallery through a filling return air connecting gallery, a filling pipeline is required to be led to the filling return air raise through the filling return air gallery and the filling return air connecting gallery before the uppermost segmented stope in the step, and natural filling and top connection can be realized due to the existence of a wedge-shaped top column during stope filling in the step; and the filling return air raise of the two-step stope is arranged at the junction of the footwall rock of the stope and is connected with the filling return air gallery through a filling return air connecting gallery.
Further, the hole bottoms of the deep holes in each row of the positive rows of the uppermost section of the first-step stope are linearly and uniformly reduced according to the thickness and the row spacing of the ore body and the height difference between the deep holes in the first row of the positive rows and the hole bottoms of the deep holes in the last row of the positive rows, and the hole bottoms of the deep holes in each row of the sections of the first-step stope except the uppermost section and each section of the second-step stope are in the same position.
Furthermore, the filling and air returning connecting roadway is arranged at the upper part of the top pillar, and the minimum distance between the filling and air returning connecting roadway and the lower boundary of the top pillar is more than or equal to 5 m.
Preferably, the height difference between the deep holes in the first row of the positive row and the bottom of the deep holes in the last row of the positive row is 3-5 m.
Advantageous effects
Compared with the prior art and the method, the open stoping subsequent filling mining method for the wedge-shaped top pillar sublevel rock drilling stage of the thick and large ore body, provided by the invention, has the following beneficial effects:
(1) the filling and roof-contacting quality is guaranteed, the roof-contacting rate is high, and the safety of mine production, particularly the stoping process of a two-step stope, can be effectively improved. The groove is pulled from the middle position when the top subsection of the stope is stoped in one step, the wedge-shaped top pillar is formed when blasting ore caving is carried out by controlling the hole bottom of the front row of blast holes, blanking and filling are carried out from the highest position when the stope is filled, the filling and top-contacting quality is guaranteed, the filling and top-contacting rate of the stope in one step is high, and the stope operation safety in two steps can be effectively guaranteed.
(2) The stope filling and roof connecting process is simple. The methods of multi-point blanking, pumping forced roof-contacting, expansion roof-contacting and the like are not needed.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a front view of a wedge-shaped top pillar sublevel drilling stage open stoping subsequent filling mining method for thick and large ore bodies, provided by the invention;
FIG. 2 is a B-B sectional view of a front view of an open-stope subsequent filling mining method in a wedge-shaped top pillar sublevel drilling stage of a thick and large ore body provided by the invention (in a stope stoping process in one step);
FIG. 3 is a C-C cross-sectional view of an elevation view of an open-stope subsequent filling mining method in a wedge-shaped top pillar sublevel drilling stage of a thick and large ore body according to the invention;
FIG. 4 is a front view of an open stope subsequent filling mining method in a wedge-shaped top pillar sublevel drilling stage of a thick and large ore body (during stope stoping in a two-step stope), provided by the invention;
FIG. 5 is a D-D cross-sectional view of an elevation view of an open-stope subsequent filling mining method in a wedge-shaped top pillar sublevel drilling stage of a thick and large ore body provided by the invention (during stope stoping in a two-step stope);
in the figure: 1-middle section transportation lane; 2-sectional transportation lane; 3-drilling a rock roadway in sections; 4-filling an air return connecting roadway; 5-filling a return air raise; 6-pass shaft; 7-ore removal haulage roadway; 8-ore removal and access; 9-deep holes in a positive row; 10-ore caving; 11-a top pillar; 12-drawing a bottom ore receiving roadway; 13-filling body.
Detailed Description
The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
As shown in fig. 1-5, the stope is arranged perpendicular to the trend of the ore body, the stope of the first step and the stope of the second step are arranged at intervals, the stope of the first step is mined and the goaf is filled, the stope of the second step is started after the strength of the filling body 13 of the stope of the first step reaches the design index, and the stope of the second step is filled by the low-strength filling body 13. The main mining-preparation cutting engineering comprises a middle-section transportation lane 1, a sectional transportation lane 2, a sectional rock drilling lane 3, a filling air return connection lane 4, a filling air return raise 5, a chute 6, a ore removal transportation lane 7, an ore removal approach 8 and a bottom-drawing ore receiving lane 12.
During stoping of the stope in the first step, the cutting grooves are arranged at the junction of the upper wall ore rock, forward-arranged blast holes of all the subsections are blasted in a retreating mode by taking the cutting grooves as free surfaces and compensating spaces, the upper subsections are subjected to stepped retreating stoping in advance, the bottoms of the deep holes 9 in the forward-arranged deep holes of the uppermost subsection are gradually arranged and reduced by taking the positions of the cutting grooves as vertexes, wedge-shaped top pillars 11 are formed at the upper parts during stoping blasting, and the caving ore 10 is shoveled out from a bottom ore discharging structure by adopting a scraper; and during stoping of the stope in the two steps, performing retreating type stoping from the upper disc to the lower disc, performing stepped stoping blasting on the upper section medium-length hole in advance of the lower section medium-length hole at a certain row distance, performing stoping on each section simultaneously, and shoveling the stoped and caved ore 10 from a bottom ore removal structure by adopting a scraper. The hole bottoms of the deep holes 9 in each row of the positive rows of the uppermost subsection of the stope in the one step are uniformly and linearly reduced according to the thickness and the row spacing of the ore body and the height difference between the deep holes 9 in the first row of the positive rows and the hole bottoms of the deep holes 9 in the last row of the positive rows, and the height difference between the deep holes 9 in the first row of the positive rows and the hole bottoms of the deep holes 9 in the last row of the positive rows is 3-5 m. The hole bottom positions of the deep holes 9 in the positive row in each section of the two-step stope are the same except the rest sections of the uppermost section.
The filling return air raise 5 of the stope in the first step is arranged at the upper part of the uppermost segmented cutting groove and is connected with the filling return air gallery through the filling return air connecting gallery 4, a filling pipeline needs to be led to the filling return air raise 5 through the filling return air gallery and the filling return air connecting gallery 4 before the uppermost segmented stope in the first step is stoped, and natural filling and top connection can be realized due to the existence of the wedge-shaped top pillar 11 during stope filling in the first step; and a filling return air raise 5 of the stope in the second step is arranged at the junction of the footwall rock of the stope and is connected with a filling return air gallery through a filling return air connecting gallery 4. The filling and air returning connecting lane 4 is arranged at the upper part of the top pillar 11, and the minimum distance from the lower boundary of the top pillar 11 is more than or equal to 5 m.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The utility model provides a thick and big ore body wedge-shaped fore-set sublevel rock drilling stage open stoping afterwards fills mining method which characterized in that: stopes are arranged perpendicular to the trend of the ore body, the stopes in the first step and the stopes in the second step are arranged at intervals, the stopes in the first step are mined and the goaf is filled, stope mining in the second step is started after the strength of the filling body in the stope in the first step reaches the design index, and low-strength filling bodies are used for filling after stope mining in the stope in the second step is finished.
2. The open stoping and subsequent filling mining method for the wedge-shaped top column sublevel drilling stage of the thick ore body according to claim 1, characterized in that: during stoping of the stope in the first step, the cutting grooves are arranged at the junction of the upper wall ore rock, forward-arranged blast holes of each section are blasted in a retreating mode by taking the cutting grooves as free surfaces and compensating spaces, the upper section is advanced and the lower section is in a stepped retreating mode for stoping, the bottoms of the deep-hole blast holes in the forward-arranged row of the uppermost section are gradually arranged and lowered by taking the positions of the cutting grooves as vertexes, wedge-shaped top pillars are formed at the upper parts during stoping blasting, and caving ore is shoveled out from a bottom ore discharging structure by adopting a shoveling conveyor; and during stoping of the stope in the two steps, performing retreating type stoping from the upper disc to the lower disc, performing stepped stoping blasting on the upper section medium-length hole in advance of the lower section medium-length hole at a certain row spacing, performing stoping on each section simultaneously, and shoveling out stoped and collapsed ores from the bottom ore removal structure by using a scraper.
3. The open stoping and subsequent filling mining method for the wedge-shaped top column sublevel drilling stage of the thick ore body according to claim 1, characterized in that: the filling return air raise of the stope in the first step is arranged at the upper part of the uppermost segmented cutting groove and is connected with the filling return air gallery through a filling return air connecting gallery, a filling pipeline is required to be led to the filling return air raise through the filling return air gallery and the filling return air connecting gallery before the uppermost segmented recovery of the stope in the first step, and natural filling and top connection can be realized due to the existence of a wedge-shaped top column during stope filling in the first step; and the filling return air raise of the two-step stope is arranged at the junction of the footwall rock of the stope and is connected with the filling return air gallery through a filling return air connecting gallery.
4. The open stoping and subsequent filling mining method for the wedge-shaped top column sublevel drilling stage of the thick ore body according to claim 2, characterized in that: the hole bottoms of the deep holes in each row of the positive rows of the uppermost section of the one-step stope are uniformly and linearly reduced according to the thickness and the row spacing of the ore body and the height difference between the deep holes in the first row of the positive rows and the deep hole bottoms in the last row of the positive rows, and the hole bottoms of the deep holes in each row of the sections of the one-step stope except the uppermost section and each section of the two-step stope are the same in position.
5. The open stoping and subsequent filling mining method for the wedge-shaped top column sublevel drilling stage of the thick ore body according to claim 3, characterized in that: the filling and air returning connecting roadway is arranged at the upper part of the top pillar, and the minimum distance from the filling and air returning connecting roadway to the lower boundary of the top pillar is more than or equal to 5 m.
6. The open stoping and subsequent filling mining method for the wedge-shaped top column sublevel drilling stage of the thick ore body according to claim 4, wherein the open stoping and subsequent filling mining method comprises the following steps: and in the step, the height difference between the bottoms of the deep holes in the first row of the positive rows and the deep holes in the last row of the positive rows is 3-5 m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110887749.2A CN113530542B (en) | 2021-08-03 | 2021-08-03 | Open stoping subsequent filling mining method for thick and large ore body wedge-shaped top column in sectional rock drilling stage |
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| CN202110887749.2A CN113530542B (en) | 2021-08-03 | 2021-08-03 | Open stoping subsequent filling mining method for thick and large ore body wedge-shaped top column in sectional rock drilling stage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114812310A (en) * | 2022-04-08 | 2022-07-29 | 海南矿业股份有限公司 | Combined mining medium-length hole rock drilling and blasting method |
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| RU2039264C1 (en) * | 1992-08-19 | 1995-07-09 | Уральский Научно-Исследовательский И Проектный Институт Медной Промышленности | Method for mining thick mineral deposits |
| WO2011079538A1 (en) * | 2009-12-28 | 2011-07-07 | 河北邯邢矿冶设计院有限公司 | Method for stope-and-fill mining in sections |
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| CN107762515A (en) * | 2017-11-15 | 2018-03-06 | 中冶沈勘秦皇岛工程设计研究总院有限公司 | A kind of gently inclined medium thick orebody panel filling mining method |
| CN110219650A (en) * | 2019-07-01 | 2019-09-10 | 长沙矿山研究院有限责任公司 | A kind of environment remodeling stage deep hole afterwards filling mining method |
| CN110778316A (en) * | 2019-11-19 | 2020-02-11 | 深圳市中金岭南有色金属股份有限公司 | Sublevel rock drilling stage open stope subsequent filling mining method adopting arched-arch-shaped top pillar structure |
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2021
- 2021-08-03 CN CN202110887749.2A patent/CN113530542B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2039264C1 (en) * | 1992-08-19 | 1995-07-09 | Уральский Научно-Исследовательский И Проектный Институт Медной Промышленности | Method for mining thick mineral deposits |
| WO2011079538A1 (en) * | 2009-12-28 | 2011-07-07 | 河北邯邢矿冶设计院有限公司 | Method for stope-and-fill mining in sections |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114812310A (en) * | 2022-04-08 | 2022-07-29 | 海南矿业股份有限公司 | Combined mining medium-length hole rock drilling and blasting method |
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