CN103216239B - Backfill handling method for activity subsidence area of mine - Google Patents
Backfill handling method for activity subsidence area of mine Download PDFInfo
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- CN103216239B CN103216239B CN201310151624.9A CN201310151624A CN103216239B CN 103216239 B CN103216239 B CN 103216239B CN 201310151624 A CN201310151624 A CN 201310151624A CN 103216239 B CN103216239 B CN 103216239B
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- backfill
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- subsidence area
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- crude tailings
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Abstract
The invention discloses a backfill handling method for an activity subsidence area of a mine. The backfill handling method is characterized in that mixed slurry is prepared by mixing high-concentration tail mortar which is obtained by densely dehydrating low-concentration tail mortar through a deep cone thickener (1) with rough aggregates and concrete which are discharged by an aggregate silo (2) and a power silo (3) through a mixer (4); and the slurry is pumped to the subsidence area (6) through a pump (5) so as to be discharged. During the discharging, the subsidence area is backfilled by a discharging mode of plane partitioning staggering and vertical cement and non-cement interbedding; according to the plane partitioning staggering discharging, the subsidence area is divided into a plurality of independent discharging areas on a plane according to a spatial distribution state of the subsidence area, and the mixed slurry is discharged in the staggered manner according to different areas; and according to the vertical cement and non-cement interbedding discharging, cement backfill layers (7) and non-cement backfill layers (8) discharge the slurry in the staggered interbedding manner in the vertical direction of the subsidence area. The backfill method has the characteristics of low backfill cost, safety and reliability in backfill and the like.
Description
Technical field
The present invention relates to the movable subsidence area backfill in a kind of mine method of disposal, be mainly used in movable subsidence area, mine is carried out to safety, environmental protection, efficiently disposed, belong to mining and geological hazard control field.
Background technology
According to statistics, from founding the state so far, China's mine development causes geological disaster 10689, death about 4779 people.Wherein surface collapse 8320, dead 535 people.From subsidence area frequency (77.83%) and death toll (11.2%) ratio, it is Mine Geological Disasters the most serious that mining area surface subsides.
The usual way in surface subsidence district, current process mine is: adopt mine solid waste (gangue, flyash, barren rock etc.) directly to carry out backfill to subsidence area and dispose.Also having there is some new methods of disposal in recent years, having backfilled as adopted blasting method subsidence area periphery massif avalanche to be carried out, mine tailing made filter cake and be backfilled to subsidence area, subsidence area is transformed into Tailings Dam etc.Said method can play certain effect to inactivated subsidence area (namely not having mining bottom subsidence area), and following problems are existed for the subsidence area (namely still digging up mine bottom subsidence area) being in active state: adopt mine solid waste directly to backfill subsidence area, easily cause the secondary disasters such as backfill body subsides on a large scale, downhole debris flow, groundwater pollution; The method of explosion avalanche massif backfill subsidence area has that the scope of application is little, blast working is complicated, the explosion backfill shortcomings such as lumpiness cannot be controlled, blasting vibration, slungshot cause casualties; Adopt tailing cake to dispose to subside have that discharging modes are dumb, high, the operating personnel of backfill cost and the problem such as equipment failure rate is high; Movable subsidence area being transformed into Tailings Dam then must cause Tailings Slurry to pour into mining face under mine and stope, even causes and floods well accident etc.Therefore, the conventional method disposing inactive subsidence area is not suitable for the disposal of movable subsidence area.
In view of the deficiency of current subsidence area backfill method of disposal, need a kind of new subsidence area to backfill method of disposal, the backfill particularly for movable subsidence area, mine is disposed.When backfill is disposed; not affecting the normal mining activity in down-hole, do not form artificial water, do not occur to backfill on a large scale while body caves in suddenly, do not cause the secondary disasters such as downhole debris flow; can mine solid waste be made full use of, reach control, eliminate the object of subsidence area.
Summary of the invention
The object of the present invention is to provide movable subsidence area, a kind of mine method of disposal.The essence of the method mine solid waste (tailings, barren rock etc.) is prepared into mixing to dispose body, make mixing dispose body and there is good mobility, suitable permeability and cooperative transformation ability, can effective the further expanding of control activity subsidence area when being subject to mining influence, avoid backfilling the generation of the secondary disasters such as downhole debris flow after disposing.
The movable subsidence area backfill in a kind of mine of the present invention method of disposal, is characterized in that: adopt discharging modes mixing being disposed body " plane subregion alternately, vertically cementing-non-cementing alternating layers " to carry out backfill disposal to subsidence area;
Described plane subregion alternating discharge is specific as follows: according to subsidence area (6) spatial distribution state, subsidence area is divided into several independent discharge districts in the plane, subregion alternating discharge during discharge;
Described vertically cementing-non-cementing layering discharge is specific as follows: the subsidence area backfill initial stage adopts cementing backfill, forms cementing backfill layer (7) in subsidence area; After the initial stage cementing backfill layer (7) is formed, just carry out non-cementing backfill, carry out cementing backfill again when non-cementing backfill layer (8) reaches certain thickness, so hocket operation, until backfill terminates; Along with the change of goaf (10) and fragmented rock body (9), backfill body can control the trend that side rock mass in limit, subsidence area moves down to center, subsidence area in time;
Described cementing, non-cementing backfill layer design parameter is as follows: initial stage cementing backfill layer thickness should be relatively large, and thickness is 5 ~ 10m, and cementing backfill layer thickness afterwards reduces gradually, controls between 0.5 ~ 5.0m; Non-glued layer thickness 5 ~ 20m.
Further, when adopting non-cementing backfill, described mixing is disposed body and is adopted preparation with the following method:
The low concentration crude tailings slurry of being discharged in ore dressing plant carries out one section of dense dehydration through deep wimble thickener (1), and after dehydration, crude tailings mass concentration is greater than 70%;
The coarse aggregate that high-consistency full auxiliary rotor after dense, aggregate silo (2) are released is prepared into uniform non-cementing backfill slip through mixer (4), and pulp quality concentration controls between 75% ~ 85%, and proportioning is crude tailings: barren rock mass ratio is 9:1 ~ 3:7.
Further, when adopting cementing backfill, described mixing is disposed body and is adopted preparation with the following method:
The low concentration crude tailings slurry of being discharged in ore dressing plant carries out one section of dense dehydration through deep wimble thickener (1), and after dehydration, crude tailings mass concentration is greater than 70%;
The cement that the coarse aggregate of the high-consistency full auxiliary rotor after dense, aggregate silo (2) being released, powder barrel-bin (3) are released is prepared into uniform cementing backfill slip through mixer (4), pulp quality concentration controls between 75% ~ 85%, proportioning is crude tailings: barren rock mass ratio is 9:1 ~ 3:7, and cement-sand ratio is 1:9 ~ 1:99.
The present invention adopts mine solid waste tailings, rubble, jigging sand etc., is prepared into lotion after adding a certain amount of cementitious material as the case may be, adopts pumping mode to be backfilled to subsidence area by ointment pumping.The back-filling way of " plane subregion, vertical layered " is adopted during the backfill of subsidence area.This method advantage is: take full advantage of mine solid waste, reduces it and destroys the pollution of environment; Because backfill body has good mobility and applicable permeability, adopt alternating layers back-filling way during backfill, backfill body has good mechanical characteristic and compatible deformation ability.Therefore can effective the further expanding of control activity subsidence area when being subject to mining influence, backfill can not cause the secondary disasters such as downhole debris flow after disposing.
Accompanying drawing explanation
The vertical layered discharge schematic diagram in Fig. 1-subsidence area, wherein 1-deep wimble thickener; 2-aggregate silo; 3-powder barrel-bin; 4-mixer; 5-pump; 6-subsidence area; 7-cementing backfill layer; 8-non-cementing backfill layer; 9-fragmented rock body; 10-goaf.
Fig. 2-the discharge of subsidence area plane subregion schematic diagram, wherein 11-discharge region one; 12-discharge region two; 13-discharge region three; 14-discharge region four.
Detailed description of the invention
Below the present invention is described further, but protection scope of the present invention is not limited to the scope of following described detailed description of the invention.
The embodiment of this method is described in detail in detail below.
Certain mining area, in long-term recovery process, defines the surface subsidence district be made up of tens Collapse Pit, and its volume up to more than 200 incomparably.Along with the carrying out of underground mining, subsidence area is constantly expanded, and normally produces cause great threat to local people's daily life and mine.The method that this ore deposit adopts mixing to dispose body backfill is administered subsidence area, specific as follows:
Adopt deep wimble thickener 1 pair of crude tailings to carry out one section of dehydration, after dehydration, crude tailings mass concentration controls 72% ~ 76%.Rubble is released through aggregate silo 2, mixes (incorporation 10% ~ 50%) in dense rear last mortar, carries out continuous uniform mixing by mixer 4.Backfill lotion mass concentration is finally made to control between 81% ~ 84%.When adopting cementing backfill, above-mentioned Pulp preparation technique is constant, only need add the cement of 1% ~ 5% before stirring link, be supplied by powder barrel-bin 3.The backfill slip prepared is pumped to subsidence area 6 through pump 5 and backfills.
According to subsidence area, earth's surface 6 landform and distribution characteristics, tentatively certain surface subsidence district, ore deposit 6 is divided into four backfill discharge region.Subregion alternating discharge mode is adopted when discharging.If first discharge discharge region 1, after being discharged into certain thickness, then discharge in discharge region 3 13.Discharge region 3 13 is then carried out discharge region 2 12 and is discharged after being discharged into certain thickness, be finally disposed to discharge region 4 14, so repeatedly carry out.So, can guarantee that backfill body can dry and solidification in time, not cause the stress of regional area fragmented rock body band concentrated.
Mode that subsidence area adopts when vertical discharge " cementing-non-cementing alternating layers discharge ", is divided into some layerings, successively backfills, and cementing backfill layer 7 is spaced with non-cementing backfill layer 8 by subsidence area on vertical section.Cementing backfill layer thickness 7 is between 0.5 ~ 10m, and non-cementing backfill layer 8 is between 5 ~ 20m, and cementing amount accounts for overall backfill amount about 30%, and cement mixing content should between 1% ~ 5%.
After tested, body is disposed in mixing backfill can reach following performance: according to " code for geological investigation of water resources and hydropower engineering " (GB50287-99), and mixing is disposed body permeability and reached medium permeable rank.Cementing backfill physical efficiency is condensed in 30 ~ 40h, and within 28 days, uniaxial compressive strength reaches 1 ~ 2MPa.Non-cementing backfill body cohesion is between 40kPa ~ 100kPa.
Adopt above-mentioned back-filling way effectively to administer certain surface subsidence district, ore deposit, tended towards stability gradually in surface subsidence district, guarantee the carrying out of the normal mining activity in down-hole simultaneously.
Claims (1)
1. the movable subsidence area backfill in a mine method of disposal, is characterized in that:
Mixing being disposed body adopts the discharging modes of " plane subregion alternately, vertically cementing-non-cementing alternating layers " to carry out backfill disposal to subsidence area;
Described plane subregion alternating discharge step is as follows: according to the spatial distribution state of subsidence area (6), subsidence area is divided in the plane several independent discharge districts, carries out subregion alternating discharge during discharge; Described vertically cementing-non-cementing alternating layers drain steps is as follows: the subsidence area backfill initial stage adopts cementing backfill, forms cementing backfill layer (7) in subsidence area; After the initial stage cementing backfill layer (7) is formed, just carry out non-cementing backfill, carry out cementing backfill again when non-cementing backfill layer (8) reaches certain thickness, so hocket operation, until backfill terminates;
Described cementing, non-cementing backfill layer structure is as follows: cementing backfill layer thickness should be relatively large, and initial stage thickness is 5 ~ 10m, and other lift height reduces gradually, until 0.5 ~ 5m; Non-glued layer thickness 5 ~ 20m;
When adopting non-cementing backfill, described mixing is disposed body and is adopted preparation with the following method:
The low concentration crude tailings slurry of being discharged in ore dressing plant carries out dense dehydration through deep wimble thickener (1) and forms high-consistency full auxiliary rotor, and after dehydration, crude tailings mass concentration is greater than 70%;
Dense rear crude tailings slurry, coarse aggregate are prepared into uniform non-cementing backfill slip through mixer (4), and pulp quality concentration controls between 75% ~ 85%, and proportioning is crude tailings: barren rock mass ratio is 9:1 ~ 3:7;
When adopting cementing backfill, described mixing is disposed body and is adopted preparation with the following method:
The low concentration crude tailings slurry of being discharged in ore dressing plant carries out one section of dense dehydration through deep wimble thickener (1), and after dehydration, crude tailings mass concentration is greater than 70%;
Dense rear crude tailings slurry, cement, coarse aggregate are prepared into uniform cementing backfill slip through mixer (4), pulp quality concentration controls between 75% ~ 85%, proportioning is crude tailings: barren rock mass ratio is 9:1 ~ 3:7, and cement-sand ratio is 1:9 ~ 1:99.
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| CN106097126B (en) * | 2016-06-20 | 2019-08-06 | 中钢集团马鞍山矿山研究院有限公司 | Caving Method with Large Space production cave-in areas hole heap row solidifies the quantization method of tailing Rational Thickness |
| CN106194257B (en) * | 2016-07-05 | 2019-05-28 | 东北大学秦皇岛分校 | A method of in the open-air pit bottom tailing disposal lotion of activity sedimentation |
| CN107975044B (en) * | 2016-10-24 | 2021-03-12 | 南京梅山冶金发展有限公司 | Method for backfilling collapse method mine by utilizing tailing surface collapse pits |
| CN108501221A (en) * | 2018-04-09 | 2018-09-07 | 长沙矿山研究院有限责任公司 | Filling slurry Preparation equipment, technique and filling system |
| CN108915765B (en) * | 2018-07-02 | 2020-10-09 | 北京科技大学 | Underground full tailing-waste stone paste filling system and filling method |
| CN110566207A (en) * | 2019-09-10 | 2019-12-13 | 东北大学 | covering layer full-tailings piling method for open-air to underground non-bottom-pillar sublevel caving method |
| CN110876290A (en) * | 2019-11-18 | 2020-03-13 | 西安科技大学 | Comprehensive configuration method for mountainous, watery, forest, field, lake and grass in sand area with consideration of mining subsidence |
| CN111436243B (en) * | 2020-01-21 | 2022-08-16 | 新疆盛洁环境技术有限责任公司 | Method for treating pit mining geological environment by using planting soil prepared from solid wastes |
| CN114294056A (en) * | 2021-12-14 | 2022-04-08 | 万宝矿产有限公司 | Open pit treatment method combining waste rock and dry tailings |
| CN114293990A (en) * | 2022-01-04 | 2022-04-08 | 长沙有色冶金设计研究院有限公司 | Method for filling open pit |
| CN114382068B (en) * | 2022-02-08 | 2023-11-10 | 江苏昌泰建设工程有限公司 | Construction method for closing warehouse of target site bag block |
| CN115059025A (en) * | 2022-06-22 | 2022-09-16 | 中国恩菲工程技术有限公司 | Combined treatment system and method for tailings and waste rocks |
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Inventor after: Wang Hongjiang Inventor after: Li Gongcheng Inventor after: Shen Xianling Inventor after: Li Jiameng Inventor after: Jiang Ji Inventor after: Xiao Chongchun Inventor after: Zhang Zewu Inventor after: Wu Aixiang Inventor after: Sun Wei Inventor after: Wang Yiming Inventor after: Li Tao Inventor after: Han Bin Inventor after: Yin Shenghua Inventor after: Yi Haibao Inventor before: Wang Hongjiang Inventor before: Shen Xianling Inventor before: Li Jiameng Inventor before: Wu Aixiang Inventor before: Sun Wei Inventor before: Wang Yiming Inventor before: Li Tao Inventor before: Han Bin Inventor before: Yin Shenghua Inventor before: Yi Haibao Inventor before: Li Gongcheng |
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Effective date of registration: 20180327 Address after: 100083 Haidian District, Xueyuan Road, No. 30, Co-patentee after: Feny Co., Ltd. Patentee after: University of Science and Technology Beijing Address before: 100083 Haidian District, Xueyuan Road, No. 30, Patentee before: University of Science and Technology Beijing |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20150617 Termination date: 20190427 |