CN106688800A

CN106688800A - Novel tailing pond moisture and fertilizer retention land reclamation process

Info

Publication number: CN106688800A
Application number: CN201710014627.6A
Authority: CN
Inventors: 刘照朗
Original assignee: GUANGDONG ANYUAN MINING TECHNOLOGY SERVICE Co Ltd
Current assignee: GUANGDONG ANYUAN MINING TECHNOLOGY SERVICE Co Ltd
Priority date: 2017-01-09
Filing date: 2017-01-09
Publication date: 2017-05-24
Anticipated expiration: 2037-01-09
Also published as: CN106688800B

Abstract

The invention discloses a novel tailing pond moisture and fertilizer retention land reclamation process. A reclaimed land is divided into two planting areas including tree planting grooves and grass and bush planting belts along the topographical contour direction of a tailing pond, and the tree planting grooves and the grass and bush planting belts are mutually spaced and parallelly arranged. The tree planting grooves are excavated into proper depths and widths, a trepanned geo-membrane is laid at the bottom and on the wall of each tree planting groove, a seepage prevention liner is laid on each trepanned geo-membrane, the grooves are alternately filled with soil dressings and base fertilizers, and a micro-irrigation system is arranged in each tree planting groove according to circumstances. A wavelike geo-membrane needs to be laid on a bottom plate at the proper depth of each grass and bush planting belt, two ends of each wavelike geo-membrane extend into the corresponding tree planting grooves, the wavelike geo-membranes are backfilled with tailing and soil dressing mixed composite soil, and a terrace is finished to form wavelike ditch ridges. Deep-root trees are planted in the tree planting grooves to highlight view environments, and shallow-root grasses and bushes are planted in the grass and bush planting belts to further form moisture and fertilizer retention vegetation.

Description

Tailings Dam retain water and nutrients land reclamation new technology

Technical field：

The application belongs to mine technology field.

Technical background：

Tailings Dam land reclamation method, is still backfilling new soil by current official's file, it is desirable to which thickness of earth covering is not typically small In 50 centimeters；But everybody knows fairly well, this is an index that cannot be realized, authorities will not also make strict assessment, mine Where so much soil moved in improve the original is doneEven if goodish backfilling new soil has been carried out in a small number of mines, the effect of ecological recovery is still It is so very poor；It is two aspects to trace it to its cause：Principal element is that on the spot tailings layer permeability is extremely strong, it is impossible to retain water and nutrients；It is secondary Factor is that the area of Tailings Dam about more than 70~80% is clinoform, although deposition beach will relax many compared to dam slope, still Cannot be detained and keep liquid manure；Land occupation condition is unable to retain water and nutrients, causes plantation layer anhydrous without fertilizer nourishing, here it is Tailings Dam is native Failure of reclaiming key；The experience of present invention reference China's desert planting recent years, with reference to the distinctive landform ground of Tailings Dam Matter condition undergoes technological transformation, it is intended to forms a kind of new technical scheme for adapting to Tailings Dam on the spot environment, thoroughly solves mine tailing Storehouse land reclamation and ecological reconstruction problem.

The content of the invention：

Along the topographic contour direction of Tailings Dam, Reclaimed Land is divided into tree planting groove 5 and grass fills 6 liang of class plantations of growth belt Region, apart from one another by arranged in parallel；Tree planting groove will excavate into Suitable depth and width, bottom land and the cell wall laying one of tree planting groove Layer perforate geomembrane 3, lays one layer of antiseepage bed course 4 on perforate geomembrane, changed in groove and fill out soil moved in improve the original and base fertilizer, and is optionally planting Irrigation system 10 is set in tree wall；Grass fills growth belt and one layer of wave geomembrane 1, wave need to be laid on the base plate of Suitable depth Formula geomembrane two ends are stretched into tree planting groove, and the composite earth of tailings and soil moved in improve the original blending is backfilled on wave geomembrane, and arrange ground Level ground, forms wave ditch 2；Deep root system trees 8 are planted in tree planting groove, to show visual field environment；It is shallow that grass fills plantation in growth belt The grass of root system fills 9, further to form water and soil conservation vegetation.

One of technical characterstic of this new technology is：In tree planting groove lay perforate geomembrane to a certain extent have every It is aqueous, but its perforate can allow the tree root must outwards to be developed through diaphragm again；Antiseepage bed course infiltration coefficient very little in tree planting groove, Also function to water proof function of fertilizer retention；Perforate geomembrane and antiseepage bed course are combined, and the liquid manure that stabilization can be formed in tree planting groove keeps Environment, promotes trees to grow vigorously, and realizes the ecological reconstruction of stabilization.

The two of the technical characterstic of this new technology are：The wave geomembrane that grass fills growth belt base plate is water barrier, wave The groove storing water fertilizer conservation that formula geomembrane is formed；Grass fills the wave ditch of growth belt earth's surface, can play and delay and block earth's surface Water is along the effect let out under clinoform；Wave geomembrane and wave ditch are combined, and form the liquid manure guarantor that grass fills growth belt Held in ring border, can promote the covering vegetation to form stabilization, both prevent sand to endanger, and ecological environment is optimized again.

Brief description of the drawings：

Fig. 1 is stope profilograph, and the meaning of label symbol is as follows in figure：

1 --- wave geomembrane, 2 --- wave ditch, 3 --- perforate geomembrane,

4 --- antiseepage bed course, 5 --- tree planting groove, 6 --- grass fills growth belt,

7 --- slope current direction, 8 --- plantation trees, 9 --- plant grass planting and fill,

10 --- irrigation system.

Specific implementation method：

The perforate geomembrane laid in tree planting groove is to dig out some eyelets on common water proof geomembrane, makes the coring of trees Can pass through；Tree planting groove antiseepage bed course is prepared with high-quality clay or cement (lime) composite soil, to make its infiltration coefficient very little, but Do not lose soil activation again；General construction method：1. the layer of sand temporary heap for first excavating grass filling growth belt is overlying on tree planting groove location；2. it is whole Reason grass fills growth belt base plate, lays wave geomembrane；3. composite earth is prepared, backfill grass fills growth belt；4. tree planting groove is excavated, is planted Tree wall sandy soil are covered and are placed in grass filling growth belt, and perforate geomembrane and antiseepage bed course are laid in tree planting groove, backfill soil moved in improve the original, set slight irrigation system System；5. grass fills growth belt earth's surface and arranges, and forms waveform ditch；6. plantation trees and grass are filled.

Claims

1. Tailings Dam retain water and nutrients land reclamation new technology, its technical characteristics is：

There are two big disadvantages in Tailings Dam land occupation condition：One is big tailings permeability, and two is that most of earth's surface is slope, so as to cause Tailings Dam cannot keep liquid manure, and land reclamation is difficult to；To overcome these disadvantages, by Tailings Dam reclaim plot be divided into it is parallel The tree planting groove and grass of arrangement fill growth belt, and take two measures：One is, in tree planting groove lay perforate geomembrane, make its Existing water-resisting property, can allow tree root outwards to be developed through diaphragm again to a certain extent；Another laying antiseepage bed course in tree planting groove, The infiltration coefficient very little of antiseepage bed course, also functions to water proof function of fertilizer retention；Perforate geomembrane and antiseepage bed course are combined, in tree planting groove The liquid manure that stabilization can be formed keeps environment, promotes trees to grow vigorously, and realizes the ecological reconstruction of stabilization；The second is, filled in grass Growth belt base plate paving wave geomembrane, forms water barrier, the groove storing water fertilizer conservation that wave geomembrane is formed；Grass is filled plants Plant band earth's surface and sort out wave ditch, wave ditch can play a part of to delay and block surface water along being let out under slope；Ripple Unrestrained formula geomembrane and wave ditch are combined, and form the liquid manure holding environment that grass fills growth belt, can promote to form covering for stabilization Lid vegetation, had both prevented sand to endanger, and ecological environment is optimized again.