CN109098711A - It is a kind of to block the heavily stressed method in ore body top using pressure relief groove - Google Patents
It is a kind of to block the heavily stressed method in ore body top using pressure relief groove Download PDFInfo
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- CN109098711A CN109098711A CN201810775267.6A CN201810775267A CN109098711A CN 109098711 A CN109098711 A CN 109098711A CN 201810775267 A CN201810775267 A CN 201810775267A CN 109098711 A CN109098711 A CN 109098711A
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- drilling
- ore body
- lower disk
- drift
- drilling drift
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
Abstract
The heavily stressed method in ore body top is blocked using pressure relief groove the invention discloses a kind of, is suitable for deep mining technical field.The method comprising the steps of: (1) determining upper and lower disk rock stratum release boundary according to strata movement range；(2) it is respectively arranged drilling drift in the upper and lower disk top side release outside boundaries across pitch of ore body, and upper and lower disk drilling drift is in the same horizontal line；(3) if distinguishing horizontally disposed dry hole close to the side of ore body in upper and lower disk drilling drift, each drilling is axial vertical with the drilling drift side wall at place；(4) downhole explosion is carried out to each drilling, forms continuous pressure relief groove above ore body.By the way that simultaneously Drilling covers top drilling in ore body top side pre-tunnel laneway road, downhole explosion is carried out, forms continuous pressure relief groove at the top of ore body, blocks overlying strata weight stress, the Depressurized mining of ore body under realization high stress environment.
Description
Technical field
The invention belongs to deep mining technical fields more particularly to a kind of utilization pressure relief groove to block ore body top heavily stressed
Method, the Depressurized mining especially suitable for high-dipping ore block under high stress environment.
Background technique
Continuous increase with social development to mineral resources demand, extensive deep exploitation of mineral resources have become mining
The inexorable trend of industrial development.With the increase of orebody buried depth, crustal stress level increases, and orebody mining top plate large area occurs and collapses
Fall, the disasters such as high-intensitive rock burst a possibility that it is increasing.Therefore, it is necessary to effectively be unloaded to ore body under high stress environment
Pressure, it is ensured that the safety and high efficiency of deep orebody.
For the rock stratum of high stress areas, common pressure relief method is to reduce stress concentration degree, i.e., arrangement in place
Release engineering makes body to be dug up mine be in stress relaxed area, slows down high stress to the adverse effect of orebody mining.Currently, release work
Journey is usually placed in disk on ore body, makes stress transfer by carrying out explosion to upper disk high stress rock mass, reaches release purpose.So
And this method is larger to upper disk rock convergence measure, when orebody mining, easily causes Stope roof large area to collapse, and increases ore dilution rate
Add, and is easy to induce roof fall accident.
Summary of the invention
For the above problem for solving the prior art, the present invention provides a kind of heavily stressed using pressure relief groove blocking ore body top
Method carries out downhole explosion by the way that in ore body top side pre-tunnel laneway road, Drilling drills in tunnel, is formed at the top of ore body continuous
Pressure relief groove blocks body top to be dug up mine stress, realizes the safety and high efficiency of ore body under high stress environment.
To achieve the above object, the invention adopts the following technical scheme:
It is a kind of to block the heavily stressed method in ore body top using pressure relief groove, which is characterized in that comprising steps of
(1) upper and lower disk rock stratum release boundary is determined according to strata movement range, preferably according to 1~3 middle section orebody mining
The strata movement boundary formed afterwards is determined；
(2) drilling drift, and upper and lower disk rock drilling are respectively arranged in the upper and lower disk top side release outside boundaries across pitch of ore body
Tunnel is in the same horizontal line；
(3) if distinguishing horizontally disposed dry hole close to the side of ore body in upper and lower disk drilling drift, each drilling it is axial with
The drilling drift side wall at place is vertical；
(4) downhole explosion is carried out to each drilling, forms continuous pressure relief groove above ore body, downhole explosion mode is preferably
Presplit blasting.
Preferably, upper and lower disk drilling drift cross dimensions is (2.5~3.5) × (2.5~3.5) m.
Preferably, each bore size is identical, and across pitch is evenly arranged respectively in upper disk and lower wall drilling drift.
Preferably, boring aperture is 60~100mm, and hole depth is 0.55 of the two sides drilling drift side wall spacing where drilling
~0.65 times.Further, the adjacent spacing of wells is 1~3m in upper and lower disk drilling drift, and upper disk drilling drift internal drilling is under
Disk drilling drift internal drilling interlaced arrangement one by one.
Beneficial effects of the present invention:
(1) most of rock stratum in strata movement angular region is pressed as suffered by stope, the present invention passes through in ore body
The upper and lower disk strata movement range of anticipation determines release boundary before excavating, and drilling is then arranged in the release boundary of ore body top side, into
Row downhole explosion forms continuous pressure relief groove on ore body top and blocks top terrane stress, realizes precisely reliable release.
(2) continuous pressure relief groove can block overlying strata weight stress, and pressure arch is exempted from formation, and body to be dug up mine is made to be in arch internal stress drop
Low area eliminates high stress to the adverse effect of orebody mining, while smaller to disk rock convergence measure on stope, is not in that top plate is big
The problems such as area is caving, high-intensitive rock burst, can take into account release and roof stability, realize the safety and high efficiency of deep orebody,
Solve the release problem on ore body top under high stress environment.
Detailed description of the invention
Fig. 1 is release work arrangement schematic diagram；
Fig. 2 is the A-A cross-sectional view of Fig. 1；
Fig. 3 is release effect diagram；
Fig. 4 is the B-B cross-sectional view of Fig. 3；
In figure: 1- drilling；2- lower wall drilling drift；The upper disk drilling drift of 3-；4- release boundary；5- ore body；6- pressure relief groove.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is described in detail.
Referring to Fig. 1-4, the present invention using pressure relief groove block the heavily stressed method in ore body top comprising steps of
(1) the upper and lower disk strata movement boundary formed after 1~3 middle section ore body 5 is exploited is prejudged according to live actual conditions
To determine release boundary 4.
(2) lower wall drilling drift 2 and upper disk are respectively arranged in the upper and lower 4 outside across pitch of disk top side release boundary of ore body 5
Drilling drift 3, upper and lower disk drilling drift are all satisfied driling explosion job requirements, and the two is located in same horizontal line, cross dimensions
It is (2.5~3.5) × (2.5~3.5) m.
(3) side in upper and lower disk drilling drift close to ore body presses that 1~3m spacing is uniform, horizontal Drilling is several respectively
Drilling 1,1 size of drilling is identical, axial vertical with the drilling drift side wall at place, and aperture is 60~100mm, and hole depth is the institute that drills
0.55~0.65 times of two sides drilling drift side wall spacing, and the drilling in lower wall drilling drift 2 and upper disk drilling drift 3
Interlaced arrangement one by one.
(4) downhole explosion is carried out to drilling 1 using Pre-splitting Blasting Technique, forms continuous pressure relief groove 6 above ore body 5,
For more general blasting method, blasting energy to be split farthest reduces construction cost.
Release boundary is determined by prejudging upper and lower disk strata movement range before ore body excavates, and unloads flanging in ore body top side
Continuous pressure relief groove is dug in boundary and blocks top terrane stress, can be taken into account release and roof stability, be realized mine under high stress environment
The Depressurized mining of body.In addition, upper and lower disk drilling drift is arranged in same horizontal line by the present invention, and make tunnel internal drilling water
It is flat, uniformly, interlaced arrangement one by one, both can guarantee and formed continuous pressure relief groove above ore body, while having simplified construction technology, reduced
Fluting cost.And when bore size is identical, continuous pressure relief groove is formed, hole depth is not lower than the two sides rock drilling where drilling
The half of tunnel side wall spacing, it is contemplated that explosion clamping action, to guarantee that demolition effect, hole depth are preferably two where drilling
0.55 times or more of side drilling drift side wall spacing is examined from many-sided synthesis such as Drilling economy, construction efficiency on this basis
Consider, hole depth should not be higher than 0.65 times.
The above embodiments are merely illustrative of the technical solutions of the present invention and is not intended to limit it, all without departing from the present invention
Any modification of spirit and scope or equivalent replacement should all cover in the protection scope of technical solution of the present invention.
Claims (8)
1. a kind of block the heavily stressed method in ore body top using pressure relief groove, which is characterized in that comprising steps of
(1) upper and lower disk rock stratum release boundary is determined according to strata movement range；
(2) drilling drift, and upper and lower disk drilling drift are respectively arranged in the upper and lower disk top side release outside boundaries across pitch of ore body
In the same horizontal line；
(3) if distinguishing horizontally disposed dry hole, each axial direction and place of drilling close to the side of ore body in upper and lower disk drilling drift
Drilling drift side wall it is vertical；
(4) downhole explosion is carried out to each drilling, forms continuous pressure relief groove above ore body.
2. the method according to claim 1, wherein upper and lower disk rock stratum release boundary is according to 1~3 middle section mine
The strata movement boundary formed after body exploitation determines.
3. the method according to claim 1, wherein upper and lower disk drilling drift cross dimensions be (2.5~
3.5) × (2.5~3.5) m.
4. the method according to claim 1, wherein each bore size is identical, in upper disk and lower wall drilling drift
Inside across pitch is evenly arranged respectively.
5. method according to claim 1-4, which is characterized in that boring aperture is 60~100mm, and hole depth is to bore
0.55~0.65 times of two sides drilling drift side wall spacing where hole.
6. according to the method described in claim 5, it is characterized in that, in upper and lower disk drilling drift the adjacent spacing of wells be 1~
3m。
7. according to the method described in claim 5, it is characterized in that, being bored in upper disk drilling drift internal drilling and lower wall drilling drift
Hole interlaced arrangement one by one.
8. the method according to claim 1, wherein downhole explosion mode is presplit blasting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810775267.6A CN109098711A (en) | 2018-07-16 | 2018-07-16 | It is a kind of to block the heavily stressed method in ore body top using pressure relief groove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810775267.6A CN109098711A (en) | 2018-07-16 | 2018-07-16 | It is a kind of to block the heavily stressed method in ore body top using pressure relief groove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109098711A true CN109098711A (en) | 2018-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810775267.6A Pending CN109098711A (en) | 2018-07-16 | 2018-07-16 | It is a kind of to block the heavily stressed method in ore body top using pressure relief groove |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922600A (en) * | 2021-02-26 | 2021-06-08 | 中国恩菲工程技术有限公司 | Stress cut-off type ground pressure control method |
| CN113216951A (en) * | 2021-06-03 | 2021-08-06 | 中南大学 | Non-explosive mechanical mining method for deep hard rock mine |
| CN113863929A (en) * | 2021-07-15 | 2021-12-31 | 中国恩菲工程技术有限公司 | Upward layered pressure relief layered filling mining method in high ground stress environment |
| CN114352283A (en) * | 2021-12-09 | 2022-04-15 | 中国恩菲工程技术有限公司 | Mining method for mine pillar in panel area through forepoling pressure relief and subsequent filling |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1032187A1 (en) * | 1982-02-22 | 1983-07-30 | Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Горной Геомеханики И Маркшейдерского Дела | Method of working neighrour coal seams |
| SU1165786A1 (en) * | 1983-07-11 | 1985-07-07 | Inst Gornogo Dela Imeni Skochi | Method of of pillar-less protection of development workings |
| CN102296958A (en) * | 2011-07-22 | 2011-12-28 | 山东科技大学 | Method for preventing rock burst by artificial space defect body |
| CN103670412A (en) * | 2013-12-11 | 2014-03-26 | 西安建筑科技大学 | Mined-out area processing and de-stressed mining method for mining steep deposits |
| CN105134217A (en) * | 2015-07-13 | 2015-12-09 | 北京矿冶研究总院 | Deep well unloading mining method |
| CN107178367A (en) * | 2017-05-23 | 2017-09-19 | 西北矿冶研究院 | Pressure relief and stoping method for steep medium-thickness ore body by segmented open-field method |
-
2018
- 2018-07-16 CN CN201810775267.6A patent/CN109098711A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1032187A1 (en) * | 1982-02-22 | 1983-07-30 | Всесоюзный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Горной Геомеханики И Маркшейдерского Дела | Method of working neighrour coal seams |
| SU1165786A1 (en) * | 1983-07-11 | 1985-07-07 | Inst Gornogo Dela Imeni Skochi | Method of of pillar-less protection of development workings |
| CN102296958A (en) * | 2011-07-22 | 2011-12-28 | 山东科技大学 | Method for preventing rock burst by artificial space defect body |
| CN103670412A (en) * | 2013-12-11 | 2014-03-26 | 西安建筑科技大学 | Mined-out area processing and de-stressed mining method for mining steep deposits |
| CN105134217A (en) * | 2015-07-13 | 2015-12-09 | 北京矿冶研究总院 | Deep well unloading mining method |
| CN107178367A (en) * | 2017-05-23 | 2017-09-19 | 西北矿冶研究院 | Pressure relief and stoping method for steep medium-thickness ore body by segmented open-field method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922600A (en) * | 2021-02-26 | 2021-06-08 | 中国恩菲工程技术有限公司 | Stress cut-off type ground pressure control method |
| CN113216951A (en) * | 2021-06-03 | 2021-08-06 | 中南大学 | Non-explosive mechanical mining method for deep hard rock mine |
| CN113216951B (en) * | 2021-06-03 | 2021-12-14 | 中南大学 | Non-explosive mechanical mining method for deep hard rock mine |
| CN113863929A (en) * | 2021-07-15 | 2021-12-31 | 中国恩菲工程技术有限公司 | Upward layered pressure relief layered filling mining method in high ground stress environment |
| CN114352283A (en) * | 2021-12-09 | 2022-04-15 | 中国恩菲工程技术有限公司 | Mining method for mine pillar in panel area through forepoling pressure relief and subsequent filling |
| CN114352283B (en) * | 2021-12-09 | 2023-07-14 | 中国恩菲工程技术有限公司 | Advanced pressure relief subsequent filling mining method for ore pillar in coiled area |
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Application publication date: 20181228 |