CN103216239A - 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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- CN103216239A CN103216239A CN2013101516249A CN201310151624A CN103216239A CN 103216239 A CN103216239 A CN 103216239A CN 2013101516249 A CN2013101516249 A CN 2013101516249A CN 201310151624 A CN201310151624 A CN 201310151624A CN 103216239 A CN103216239 A CN 103216239A
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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
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Technical field
The present invention relates to the movable subsidence area backfill method of disposal in a kind of mine, be mainly used in safety, environmental protection, the efficient disposal are carried out in movable subsidence area, mine, belong to mining and geological hazard control field.
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Background technology
According to statistics, found the state so far certainly, China's mine development causes 10689 of geological disasters, dead about 4779 people.Wherein surface collapse is 8320, dead 535 people.From subsidence area frequency (77.83%) and death toll (11.2%) ratio, it is the most serious mining geology disaster that mining area surface subsides.
The common way of handling surface subsidence district, mine at present is: adopt mine discarded object (gangue, flyash, barren rock etc.) directly backfill to be carried out in the subsidence area and dispose.Some new methods of disposal have also appearred in recent years, as adopt blasting method with subsidence area periphery massif avalanche carrying out backfill, mine tailing is made filter cake be backfilled to the subsidence area, the subsidence area be transformed into mine tailing storehouse etc.Said method can play certain effect to inactivated subsidence area (being that the bottom, subsidence area does not have mining), and have following problems for the subsidence area that is in active state (being still to dig up mine in the bottom, subsidence area): adopt the mine discarded object that backfill is directly carried out in the subsidence area, easily cause secondary disasters such as the backfill body subsides on a large scale, downhole debris flow, groundwater pollution; Shortcoming such as the method for explosion avalanche massif backfill subsidence area has that the scope of application is little, blast working is complicated, explosion backfill lumpiness can't control, blasting vibration, slungshot cause casualties; Adopt tailing cake to dispose to subside have that discharging modes are dumb, problems such as backfill cost height, operating personnel and equipment failure rate height; Movable subsidence area is transformed into the mine tailing storehouse then must causes the mine tailing slurry to pour into mining face under mine and stope, even cause the well accident etc. of flooding.Therefore, be not suitable for the disposal of movable subsidence area for the conventional method of disposing non-movable subsidence area.
In view of the deficiency of present subsidence area backfill method of disposal, need a kind of new subsidence area backfill method of disposal, particularly dispose at the backfill of movable subsidence area, mine.When backfill is disposed; when not influencing the normal mining activity in down-hole, not forming artificial water, extensive backfill body does not take place cave in, do not cause secondary disasters such as downhole debris flow suddenly; can make full use of the mine discarded object, reach control, eliminate the purpose of subsidence area.
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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 this method is mine discarded object (tailings, barren rock etc.) to be prepared into to mix dispose body, make and mix to dispose body and have good flowability, suitable permeability and cooperative transformation ability, effective further expanding of control activity subsidence area when being subjected to mining influence avoids backfill to dispose the generation of secondary disasters such as back downhole debris flow.
The movable subsidence area backfill method of disposal in a kind of mine of the present invention is characterized in that: employing will mix the discharging modes of disposing body " plane subregion alternately, vertical gluing-non-glued alternating layers " the backfill disposal will be carried out in the subsidence area;
Described plane subregion alternately discharges specific as follows: according to subsidence area (6) spatial distribution state the subsidence area is divided into several independent discharge region in the plane, alternately discharging of subregion during discharging;
The glued layering discharging of described vertical gluing-non-is specific as follows: the subsidence area backfill initial stage is adopted glued backfill, forms glued backfill layer (7) in the subsidence area; After glued backfill layer of initial stage (7) forms, just carry out non-glued backfill, non-glued backfill layer (8) carries out glued backfill again when reaching certain thickness, and the operation that so hockets finishes until backfill; Along with the variation of goaf (10) and fragmented rock body (9), the backfill body can in time be controlled the trend that limit, subsidence area group rock mass moves down to the center, subsidence area;
Described gluing, the concrete parameter of non-glued backfill layer are as follows: the initial stage, glued backfill layer thickness should be relatively large, and thickness is 5～10m, and glued backfill layer thickness afterwards reduces gradually, is controlled between 0.5 ~ 5.0m; Non-glued layer thickness 5 ~ 20m.
Further, when adopting non-glued backfill, described mixing is disposed body and is adopted following method preparation:
The full last mortar of low concentration that the ore dressing plant is discharged carries out one section dense dehydration through deep wimble thickener (1), and the full tailings mass concentration in dehydration back is greater than 70%;
The coarse aggregate that high-consistency full auxiliary rotor after dense, aggregate silo (2) are emitted is prepared into uniform non-glued backfill slip through mixer (4), and pulp quality concentration is controlled between 75% ~ 85%, and proportioning is full tailings: the barren rock mass ratio is 9:1 ~ 3:7.
Further, when adopting glued backfill, described mixing is disposed body and is adopted following method preparation:
The full last mortar of low concentration that the ore dressing plant is discharged carries out one section dense dehydration through deep wimble thickener (1), and the full tailings mass concentration in dehydration back is greater than 70%;
The coarse aggregate that high-consistency full auxiliary rotor after dense, aggregate silo (2) are emitted, the cement that powder silo (3) is emitted are prepared into uniform glued backfill slip through mixer (4), pulp quality concentration is controlled between 75% ~ 85%, proportioning is full tailings: the barren rock mass ratio is 9:1 ~ 3:7, and cement-sand ratio is 1:9 ~ 1:99.
The present invention adopts mine discarded object 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 that ointment pumping is carried out backfill to the subsidence area.Adopt the back-filling way of " plane subregion, vertical layered " during the subsidence area backfill.This method advantage is: made full use of the mine discarded object, reduced its pollution to environment and destroyed; Because the permeability that the backfill body has good flowability and is fit to adopts the alternating layers back-filling way during backfill, the backfill body has good mechanical characteristic and compatible deformation ability.Therefore effective further expanding of control activity subsidence area when being subjected to mining influence can not cause secondary disasters such as downhole debris flow after backfill is disposed.
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Description of drawings
The vertical layered discharging schematic diagram in Fig. 1-subsidence area, wherein 1-deep wimble thickener; 2-aggregate silo; 3-powder silo; 4-mixer; 5-pump; 6-subsidence area; 7-glued backfill layer; 8-non-glued backfill layer; 9-fragmented rock body; 10-goaf.
Fig. 2-plane, subsidence area subregion discharging schematic diagram, wherein 11-discharge region one; 12-discharge region two; 13-discharge region three; 14-discharge region four.
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The specific embodiment
Below the present invention is described further, but protection scope of the present invention is not limited to the following scope of describing the specific embodiment.
The embodiment of this method is described in detail in detail below.
Certain mining area has formed the surface subsidence district that is made of tens Collapse Pit in long-term recovery process, its volume up to more than 200 incomparably.Along with the carrying out of underground mining, the subsidence area is constantly expanded, and local people's daily life and mine ordinary production are caused great threat.This ore deposit adopts the method for mixing the backfill of disposal body that the subsidence area is administered, and is specific as follows:
Adopt 1 pair of full tailings of deep wimble thickener to carry out one section dehydration, the full tailings mass concentration in dehydration back is controlled at 72% ~ 76%.Rubble is emitted through aggregate silo 2, mixes in the last mortar of dense back (incorporation 10% ~ 50%), is undertaken evenly mixing continuously by mixer 4.Backfill lotion mass concentration is controlled between 81% ~ 84%.When adopting glued backfill, above-mentioned slip preparation technology is constant, only needs add 1% ~ 5% cement before stirring link, is supplied with by powder silo 3.The backfill slip for preparing is pumped to subsidence area 6 through pump 5 and carries out backfill.
According to subsidence area, the face of land 6 landform and distribution characteristics, tentatively certain surface subsidence district, ore deposit 6 is divided into four backfill discharge region.When discharging, adopt subregion to replace discharging modes.If discharge region 1 is at first discharged, be discharged into certain thickness after, then discharge in discharge region 3 13.Discharge region 3 13 is then carried out discharge region 2 12 dischargings after being discharged into certain thickness, is disposed to discharge region 4 14 at last, carries out so repeatedly.So, can guarantee backfill body in time drying and curing, not cause the stress of regional area fragmented rock body band to concentrate.
" glued-non-glued alternating layers discharging " mode is adopted in the subsidence area when vertical discharging, be about to the subsidence area and be divided into some layerings on vertical section, successively carries out backfill, and glued backfill layer 7 and non-glued backfill layer 8 spaces.Glued backfill layer thickness 7 is between 0.5 ~ 10m, and non-glued backfill layer 8 is between 5 ~ 20m, and glued amount accounts for overall backfill amount about 30%, and cement mixing content should be between 1% ~ 5%.
After tested, mix backfill disposal body and can reach following performance: according to " code for geological investigation of water resources and hydropower engineering " (GB50287-99), mix disposal body permeability and reach medium permeable rank.Glued backfill physical efficiency is condensed in 30 ~ 40h, and uniaxial compressive strength reached 1 ~ 2MPa in 28 days.Non-glued backfill body cohesion is between 40kPa ~ 100kPa.
Adopt above-mentioned back-filling way effectively to administer, tended towards stability gradually in the surface subsidence district, guarantee the carrying out of the normal mining activity in down-hole simultaneously certain surface subsidence district, ore deposit.
Claims (3)
1. the movable subsidence area backfill method of disposal in a mine is characterized in that:
To mix and dispose body and adopt the discharging modes of " plane subregion alternately, vertical gluing-non-glued alternating layers " that the backfill disposal is carried out in the subsidence area;
It is as follows that described plane subregion replaces drain steps: according to the spatial distribution state of subsidence area (6), the subsidence area is divided into several independent discharge region in the plane, carries out alternately discharging of subregion during discharging;
Described vertical gluing-non-glued alternating layers drain steps is as follows: the subsidence area backfill initial stage is adopted glued backfill, forms glued backfill layer (7) in the subsidence area; After glued backfill layer of initial stage (7) forms, just carry out non-glued backfill, non-glued backfill layer (8) carries out glued backfill again when reaching certain thickness, and the operation that so hockets finishes until backfill;
Described gluing, non-glued backfill layer structure are as follows: glued 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.
2. method according to claim 1 is characterized in that, when adopting non-glued backfill, described mixing is disposed body and adopted following method preparation:
The full last mortar of low concentration that the ore dressing plant is discharged carries out dense dehydration formation high-consistency full auxiliary rotor through deep wimble thickener (1), and the full tailings mass concentration in dehydration back is greater than 70%;
The full last mortar in dense back, coarse aggregate are prepared into uniform non-glued backfill slip through mixer (4), and pulp quality concentration is controlled between 75% ~ 85%, and proportioning is full tailings: the barren rock mass ratio is 9:1 ~ 3:7.
3. method according to claim 1 is characterized in that, when adopting glued backfill, described mixing is disposed body and adopted following method preparation:
The full last mortar of low concentration that the ore dressing plant is discharged carries out one section dense dehydration through deep wimble thickener (1), and the full tailings mass concentration in dehydration back is greater than 70%;
The full last mortar in dense back, cement, coarse aggregate are prepared into uniform glued backfill slip through mixer (4), and pulp quality concentration is controlled between 75% ~ 85%, and proportioning is full tailings: the barren rock mass ratio is 9:1 ~ 3:7, and cement-sand ratio is 1:9 ~ 1:99.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106097126A (en) * | 2016-06-20 | 2016-11-09 | 中钢集团马鞍山矿山研究院有限公司 | Caving Method with Large Space produces the quantization method of cave-in areas hole heap row's solidification mine tailing Rational Thickness |
| CN106194257A (en) * | 2016-07-05 | 2016-12-07 | 东北大学秦皇岛分校 | A kind of in the method for tailing disposal mastic at the bottom of the open-air pit of activity sedimentation |
| CN107975044A (en) * | 2016-10-24 | 2018-05-01 | 南京梅山冶金发展有限公司 | A kind of method that Caving Method with Large Space mine is backfilled using tailing surface subsidence hole |
| 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 |
| CN108915765A (en) * | 2018-07-02 | 2018-11-30 | 北京科技大学 | A kind of underground crude tailings-barren rock Paste-filling System and placement 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 |
| CN111436243A (en) * | 2020-01-21 | 2020-07-24 | 新疆盛洁环境技术有限责任公司 | Method for treating pit mining geological environment by utilizing planting soil prepared from solid waste |
| 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 |
| CN114382068A (en) * | 2022-02-08 | 2022-04-22 | 江苏昌泰建设工程有限公司 | Closed-warehouse construction method for target site mould 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 |
| WO2023109378A1 (en) * | 2021-12-14 | 2023-06-22 | 万宝矿产有限公司 | Waste rock and dry tailings combined treatment method for open pit |
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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 |
| CN106097126A (en) * | 2016-06-20 | 2016-11-09 | 中钢集团马鞍山矿山研究院有限公司 | Caving Method with Large Space produces the quantization method of cave-in areas hole heap row's solidification mine tailing Rational Thickness |
| CN106194257A (en) * | 2016-07-05 | 2016-12-07 | 东北大学秦皇岛分校 | A kind of in the method for tailing disposal mastic at the bottom of the open-air pit of activity sedimentation |
| 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 |
| CN107975044A (en) * | 2016-10-24 | 2018-05-01 | 南京梅山冶金发展有限公司 | A kind of method that Caving Method with Large Space mine is backfilled using tailing surface subsidence hole |
| 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 |
| CN108915765A (en) * | 2018-07-02 | 2018-11-30 | 北京科技大学 | A kind of underground crude tailings-barren rock Paste-filling System and placement 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 |
| CN111436243A (en) * | 2020-01-21 | 2020-07-24 | 新疆盛洁环境技术有限责任公司 | Method for treating pit mining geological environment by utilizing planting soil prepared from solid waste |
| WO2023109378A1 (en) * | 2021-12-14 | 2023-06-22 | 万宝矿产有限公司 | Waste rock and dry tailings combined treatment method for open pit |
| 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 |
| CN114382068A (en) * | 2022-02-08 | 2022-04-22 | 江苏昌泰建设工程有限公司 | Closed-warehouse construction method for target site mould bag block |
| 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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Granted publication date: 20150617 Termination date: 20190427 |