CN107476318A - A kind of determination method of Tailings Dam ore drawing pond specification - Google Patents

A kind of determination method of Tailings Dam ore drawing pond specification Download PDF

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Publication number
CN107476318A
CN107476318A CN201710852764.7A CN201710852764A CN107476318A CN 107476318 A CN107476318 A CN 107476318A CN 201710852764 A CN201710852764 A CN 201710852764A CN 107476318 A CN107476318 A CN 107476318A
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China
Prior art keywords
dam
ore drawing
sand
pond
tailings
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CN201710852764.7A
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Inventor
马纪鑫
陈小艳
徐连生
黄贵臣
孙孝东
李铁柱
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Ansteel Mining Co Ltd
Angang Group Mining Co Ltd
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Angang Group Mining Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/18—Making embankments, e.g. dikes, dams

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Revetment (AREA)

Abstract

The present invention relates to the technical field of mine tailing mud dust suppression, specifically a kind of determination method of Tailings Dam ore drawing pond specification, it is characterised in that comprise the following steps：1) multiple ore drawing branch pipes are set on the ore drawing main pipeline of Tailings Dam key dam laying, build some groups of ore drawing Ikedas along key dam direction on dry sand of tailings reservoir surface, described ore drawing Ikeda is made up of several ore drawing ponds, and each ore drawing pond is surrounded by sand dam；2) ore drawing pond width i.e. sand dam length degree are determined；3) trapezoidal sand earth dam top width, dam body height are determined, calculates dam body bottom width；4) length for determining that each ore drawing pond is horizontal-extending into key dam is calculated.The specification built the invention enables Tailings Dam ore drawing pond is more reasonable, more economical, it is possible to increase the stability and continuation of ore drawing Ikeda dust suppression operation, has remarkable result to environmental improvement and improvement.

Description

A kind of determination method of Tailings Dam ore drawing pond specification
Technical field
The invention belongs to the technical field of mine tailing mud dust suppression, more particularly to a kind of determination side of Tailings Dam ore drawing pond specification Method.
Background technology
Iron ore mine dry sand of tailings reservoir in dry season or wind season by generating region property dust pollution question, due to the main work(of Tailings Dam Can store last person's slag in metal mine production process and ring water is reclaimed for selecting factory to recycle by natural filtration, Tailings Dam Including dam body, Gan Tan, water catchment area, formed wherein dry beach is all mill tailings natural sedimentation, powder can be formed in dry season or wind season Dirt pollution problem, the dust-suppression method of present comparative maturity is sprinkling dust suppressant solidification Gan Tan surfaces and watering dust suppression method.Sprinkling suppression Dirt agent anti-dust effect is preferable, but dry beach face product is big, and dynamic ore drawing, and ore drawing will fail again after dust suppressant solidification, institute To be applicable the Tailings Dam for having closed storehouse.Sprinkle water dust suppression method the shortcomings that be that spray area is big, up-front investment is expensive, later maintenance into This is big, and dam facing constantly increases, and watering pipeline periodically also needs to raise, and largely influences to return in storehouse using water in storehouse Water.
Ikeda ore drawing dust suppression method is a kind of dust-suppression method of low-cost high-efficiency, and this method is directed to dry sand of tailings reservoir area Greatly, the unfixed feature in ore drawing position, surface configuration in utilizing works mechanical alteration dam, Ikeda is built on storehouse Nei Gantan surfaces, Ore pulp is placed in Ikeda, beach surface wettability is done into dry beach all standing, holding with ore pulp, suppress airborne dust.The build of Ikeda will examine Consider cost, common native stone is built a dam, and the big cost of process engineering amount is high, and construct is influenceed greatly by weather；Tailings is built a dam, in dam on the spot Materials, dam body shaping is fast, saves cost, but tailings low intensity, and in Ikeda after water, the thin easy generation dam break of tailings dam body is asked Topic, build Gao Zhuhou quantities increases again, cost increase.So the most perfect condition that Ikeda is built is that tailings dam body can just be held By water in pond to shearing force caused by dam body.Therefore, it is more reasonable, more economical for the Ikeda specification of build, improve pond The stability of field ore drawing dust suppression operation is, it is necessary to there is the determination method of a rational Ikeda specification.
The content of the invention
It is an object of the invention to provide a kind of determination method of Tailings Dam ore drawing pond specification.
The purpose of the present invention is achieved through the following technical solutions：
The determination method of a kind of Tailings Dam ore drawing pond specification of the present invention, it is characterised in that comprise the following steps：
1) multiple ore drawing branch pipes are set on the ore drawing main pipeline of Tailings Dam ring dam laying, in dry sand of tailings reservoir surface Yan Ba Direction makes some groups of ore drawing Ikedas, and the ore drawing Ikeda is made up of several ore drawing ponds, and each ore drawing pond is surrounded by sand dam, sand It is vertical with flow of slurry in earth dam that to block water sand earth dam, other sand dams are Bianba, and following sand dams are to block water sand earth dam, and And comprise at least 2 ore drawing branch pipes in each ore drawing pond；
2) ore drawing pond width B determination：
Ore deposit pond width B is that the length on sand dam determines according to the concrete shape in each ore drawing pond；
3) determination of trapezoidal sand dam cross-sectional dimensions：
3.1) Tailings Dam sand is gathered, triaxial machining experiment is carried out and determines to obtain the internal friction angle on sand damSand dam Cohesive force c；
Wherein：For the internal friction angle on sand dam, degree, c is the cohesive force on sand dam, KN/m2；
3.2) trapezoidal sand earth dam top width F determination：
Dam body top width F according to《Tailings facilities design specification》GB50863-2013, it is F rice to determine dam body top width；
F is sand earth dam top width, m；
3.3) trapezoidal sand earth dam height H determination：
Trapezoidal sand earth dam height H is ore drawing pond water catchment area upper and lower side depth displacement；
H be sand earth dam height, m；
3.4) trapezoidal sand earth dam bottom width G determination
Trapezoidal dam body bottom width G calculates according to formula (1)：
For sand dam, α=22.5 °, β<α；
Wherein：G is sand earth dam bottom width, m；H be sand earth dam height, m；F is sand earth dam top width, m；α is Sliding surface inclination angle when sand dam destroys, degree；β is slope angle, degree；It is specifically shown in Fig. 1；
The derivation method of formula (1) is：
Fig. 1 is sand dam side slope schematic diagram：
Wherein：F- sands dam width at dam crest, m；G- sands dam dam bottom width degree, m；H- sand height of dam degree, m；VABC- slide mass Volume, m3；W- slide mass ABC weight, KN；The sliding force of T- soil, KN；N- soil is to the normal pressure of sliding surface, KN；γ-sand Unit weight, KN/m3；β-slope angle, degree；Sliding surface inclination angle when α-sand destroys, degree；The l- sliding surface length of sides, m；
See Fig. 1, intercept a unit length along length of slope direction analyzes as plane problem.
Slide mass ABC weight W, sliding surface inclination alpha, it is W=γ V that body weight is slided on sliding surface ACABC, caused sliding force T and soil Shear strength τ be respectively
T=Wsin α
The safety coefficient F of side slopesIt can be represented i.e. with sliding force with skid resistance
The shear strength of τ-soil, KN/m2
To ensure Soil Slope Stability, safety coefficient FsValue is typically no less than 1.25, special circumstances desirable 1.15, looks into《Mine tailing Facilities design specification》GB50863-2013, this example sand dam small scale desirable 1.15.
For c=0,Sand dam, safety coefficient expression formula can be expressed as
As α=β, FsMinimum, side slope top layer are most easily slided, at this moment
It can obtain
β<Arctan0.4054892=22.5 °, i.e. α=22.5 °
As shown in Figure 1
Trapezoidal dam body bottom width can be obtained
When taking β<During α=22.5, it is determined that dam body bottom width G, not dam break；
4) the ore drawing pond length L horizontal-extending into key dam determination：
The gradient for surveying ore drawing pond Nei Gan beaches is i, according to the depth displacement of ore drawing pond water catchment area top and bottom, as sand Dam dam body height H, the ore drawing pond length parameter L horizontal-extending into key dam by formula (2) determine,
L≤Lmax=H/i (2)
Wherein：LmaxFor the maximum length that ore drawing pond is horizontal-extending into key dam, m；
The derivation of formula (1) described in step 3.4) is pressed《Tailings facilities design specification》GB50863-2013 normal process enters OK.
Brief description of the drawings
Fig. 1 is sand dam side slope schematic diagram；
Fig. 2 is the schematic diagram of Tailings Dam ore drawing Ikeda specification.
Embodiment
The invention will be further described with reference to the accompanying drawings and examples.
As Figure 1-Figure 2, the determination method of a kind of Tailings Dam ore drawing pond specification of the invention, it is characterised in that including under Row step：
1) three groups of ore drawing Ikedas are made along the direction of key dam 1 on dry sand of tailings reservoir surface, in the ore drawing that Tailings Dam key dam 3 is laid 18 ore drawing branch pipes 2 are set on main pipeline 1；
2) ore drawing pond width B determination：
As shown in Fig. 2 the present embodiment is provided with three groups of ore drawing Ikedas altogether；Every group sets three ore drawing ponds, is divided into the first ore drawing pond 4, the second ore drawing pond 5, the 3rd ore drawing pond 6；
Width B corresponding to first ore drawing pond 41, that is, sand dam length degree B1It is designed as 160 meters；
Width B corresponding to second ore drawing pond 52, that is, sand dam length degree B2It is designed as 170 meters；
Width B corresponding to 3rd ore drawing pond 63, that is, sand dam length degree B3It is designed as 180 meters；
It is also equifinality corresponding to second group of ore drawing Ikeda and the 3rd group of ore drawing Ikeda；
3) determination of trapezoidal sand dam cross-sectional dimensions：
3.1) Tailings Dam sand is gathered, triaxial machining experiment is carried out and determines to obtain the internal friction angle on sand damFor 25 degree, sand The cohesive strength c of earth dam is zero；
Wherein：For the internal friction angle on sand dam, degree, c is the cohesive force on sand dam, KN/m2；
3.2) trapezoidal sand earth dam top width F determination：
Dam body top width F according to《Tailings facilities design specification》GB50863-2013, it is 2 meters to determine dam body top width F；
F is sand earth dam top width, m；
3.3) trapezoidal sand earth dam height H determination：
Trapezoidal sand earth dam height H is ore drawing pond water catchment area upper and lower side depth displacement；
H be sand earth dam height, m；
3.4) trapezoidal sand earth dam bottom width G determination
Trapezoidal dam body bottom width G calculates according to formula (1)：
For sand dam, α=22.5 °, meet β<During α, not dam break；
Wherein：G is sand earth dam bottom width, m；H be sand earth dam height, m；F is sand earth dam top width, m；α is Sliding surface inclination angle when sand dam destroys, degree；β is slope angle, degree；Fig. 1 is specifically shown in, Fig. 1 is sand dam side slope schematic diagram；
4) the ore drawing pond length L horizontal-extending into key dam determination：
The gradient for surveying ore drawing pond Nei Gan beaches is i, according to the depth displacement H of ore drawing pond water catchment area top and bottom, ore drawing pond Into key dam, horizontal-extending length L is determined by formula (2),
L≤Lmax=H/i (2)
Wherein：LmaxFor the maximum length that ore drawing pond is horizontal-extending into key dam, m；
A height of 159.6 meters of the beach top mark of the close key dam 1 of the present embodiment actual measurement, the dry beach absolute altitude close to water catchment area in reservoir area are 154.48 meters, total 5.12 meters of depth displacement.With the dry beach gradient i in 50 meters of 1 distance of key dam1For 2.8%, with the distance 50 of key dam 1 The dry beach gradient i of -150 meters of rice2For 1.6%, with 150 meters of 1 distance of key dam to the dry beach gradient i between water catchment area in storehouse3For 1.3%.
Take sand earth dam height H corresponding to the first ore drawing pond 41For 2 meters, can be obtained by formula (2)
Lmax1=H1/i1=2/0.028=71.43 (rice)
That is the first ore drawing pond 4 maximum length horizontal-extending into key dam 1 is 71.43 meters；
According to actual conditions and security consideration, it is 60 to determine the first ore drawing pond 4 length horizontal-extending into key dam 1 Rice；
Take β1For 20 degree, meet β<α, trapezoidal dam body bottom width G is calculated by formula (1)1：
Sand earth dam bottom width G i.e. corresponding to the first ore drawing pond 41For 6.37 meters；
According to actual conditions and security consideration, G is determined1For 6.50 meters；
Take sand earth dam height H corresponding to the second ore drawing pond 52For 2 meters, can be obtained by formula (2)
Lmax2=H2/i2=2/0.016=125 (rice)
That is the second ore drawing pond 5 from the sand dam of the first ore drawing pond 4 maximum length horizontal-extending into key dam 1 be 125 meters；
According to actual conditions and security consideration, determine the second ore drawing pond 5 from the sand dam of the first ore drawing pond 4 into key dam 1 Horizontal-extending length is 100 meters；
Take β2For 20 degree, meet β<α, trapezoidal dam body bottom width G is calculated by formula (1)2：
Sand earth dam bottom width G i.e. corresponding to the second ore drawing pond 52For 6.37 meters；
According to actual conditions and security consideration, G is determined2For 6.5 meters；
Take sand earth dam height H corresponding to the 3rd ore drawing pond 63For 1.8 meters, can be obtained by formula (2)
Lmax3=H3/i3=1.8/0.013=138.46 (rice)
That is the 3rd ore drawing pond 6 from the sand dam of the second ore drawing pond 5 maximum length horizontal-extending into key dam 1 be 138.46 Rice；
According to actual conditions and security consideration, determine the 3rd ore drawing pond 6 from the sand dam of the second ore drawing pond 5 into key dam 1 Horizontal-extending length is 115 meters；
Take β3For 20 degree, meet β<α, trapezoidal dam body bottom width G is calculated by formula (1)3：
Sand earth dam bottom width G i.e. corresponding to the 3rd ore drawing pond 63For 5.93 meters；
According to actual conditions and security consideration, G is determined3For 6 meters；
The cross-sectional dimensions of the Bianba in each ore drawing pond are in addition to dam body height, identical with corresponding sand dam, dam Body height gradually reduces, until being highly zero at key dam 1.

Claims (2)

  1. A kind of 1. determination method of Tailings Dam ore drawing pond specification, it is characterised in that：
    Comprise the following steps：
    1) multiple ore drawing branch pipes are set on the ore drawing main pipeline of Tailings Dam key dam laying, on dry sand of tailings reservoir surface along key dam side To some groups of ore drawing Ikedas are made, the ore drawing Ikeda is made up of several ore drawing ponds, and each ore drawing pond is surrounded by sand dam, and 2 ore drawing branch pipes are comprised at least in each ore drawing pond；
    2) ore drawing pond width B determination：
    Ore drawing pond width B is that the length on sand dam determines according to the concrete shape in each ore drawing pond；
    3) determination of trapezoidal sand dam cross-sectional dimensions：
    3.1) Tailings Dam sand is gathered, triaxial machining experiment is carried out and determines to obtain the internal friction angle on sand damThe cohesion on sand dam Power c；
    Wherein：For the internal friction angle on sand dam, degree, c is the cohesive force on sand dam, KN/m2；
    3.2) trapezoidal sand earth dam top width F determination：
    Dam body top width F according to《Tailings facilities design specification》GB50863-2013, it is F rice to determine dam body top width；
    F is sand earth dam top width, m；
    3.3) trapezoidal sand earth dam height H determination：
    Trapezoidal sand earth dam height H is ore drawing pond water catchment area upper and lower side depth displacement；
    H be sand earth dam height, m；
    3.4) trapezoidal sand earth dam bottom width G determination
    Trapezoidal dam body bottom width G calculates according to formula (1)：
    For sand dam, α=22.5 °, meet β<During α, not dam break；
    Wherein：G is sand earth dam bottom width, m；H be sand earth dam height, m；F is sand earth dam top width, m；α is sand Sliding surface inclination angle when dam destroys, degree；β is slope angle, degree；
    4) the ore drawing pond length L horizontal-extending into key dam determination：
    The gradient for surveying ore drawing pond Nei Gan beaches is i, according to the depth displacement of ore drawing pond water catchment area top and bottom, as sand Ba Ba Body height H, the ore drawing pond length L horizontal-extending into key dam by formula (2) determine,
    L≤Lmax=H/i (2)
    Wherein：LmaxFor the maximum length that ore drawing pond is horizontal-extending into key dam, m.
  2. 2. the method according to claim 1 for determining Tailings Dam ore drawing pond specification, it is characterised in that described in step 3.4) The derivation of formula (1) is pressed《Tailings facilities design specification》GB50863-2013 normal process is carried out.
CN201710852764.7A 2017-09-20 2017-09-20 A kind of determination method of Tailings Dam ore drawing pond specification Withdrawn CN107476318A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110965561A (en) * 2019-12-10 2020-04-07 太原钢铁(集团)有限公司 Process method for constructing tailing high dam by using waste rocks

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US20080213049A1 (en) * 2007-03-01 2008-09-04 Higgins Timothy R Methods for Controlling Dust and Creating Bio-Crust
CN104711990B (en) * 2015-01-28 2016-08-17 中冶京诚（秦皇岛）工程技术有限公司 Improve the ore drawing method of Tailings Dam storage capacity utilization rate
CN206290279U (en) * 2016-11-29 2017-06-30 金川集团股份有限公司 A kind of drawing chute deduster

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1006774A1 (en) * 1981-07-03 1983-03-23 Всесоюзный Научно-Исследовательский Институт Безопасности Труда В Горнорудной Промышленности Method for controlling dust in tail storages
US20080213049A1 (en) * 2007-03-01 2008-09-04 Higgins Timothy R Methods for Controlling Dust and Creating Bio-Crust
CN104711990B (en) * 2015-01-28 2016-08-17 中冶京诚（秦皇岛）工程技术有限公司 Improve the ore drawing method of Tailings Dam storage capacity utilization rate
CN206290279U (en) * 2016-11-29 2017-06-30 金川集团股份有限公司 A kind of drawing chute deduster

Non-Patent Citations (4)

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Title
中国有色金属工业协会: "《尾矿设施设计规范（GB50863-2013）》", 1 December 2013 *
卢廷浩: "《土力学（第二版）》", 31 May 2005 *
朱开桂: "池填法筑坝的应用", 《化工矿山技术》 *
陈斌等: "矿山开放性尘源及污染防治措施", 《2016中国环境科学学会学术年会论文集（第三卷）》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110965561A (en) * 2019-12-10 2020-04-07 太原钢铁(集团)有限公司 Process method for constructing tailing high dam by using waste rocks

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Application publication date: 20171215