Composition for recultivation of open-cut mines and disturbed lands

FIELD: ecology.

SUBSTANCE: invention relates to building and reclamation of lands in petroleum-extracting regions, in particular, for recultivation of dry-digging open-cut mines and disturbed lands providing recovery of relief and productivity of soil and utilization of boring slime as a toxic drilling waste. The composition comprises peat-sand mixture (1:1) as a filling agent and a sorbent, 49-69% by volume, 30-50% of boring slime made in building holes and up to 1% of active additives used for reducing the concentration of soluble petroleum products and their toxicity, and for neutralization of peat medium acid reaction to increase pH value from 3-4 to 6-7.5. As active additives method involves the following components by volumes: (a) unslaked lime, 0.6-0.8%; "Soileks", 0.12-0.15%, and "Degradolais", the balance; or (b) sorbent "Unipolimer", 0.4-0.6%; biochemical preparation "Polyenzyme complex UNI-REM", 0.4-0.6%. Using the proposed composition provides elimination open-cut mines and recovery the productive soil layer and promotes to utilization of industrial waste, i. e. boring slimes, and reducing the cost.

EFFECT: valuable properties of composition.

4 cl

 

The invention relates to the field of construction and land reclamation in the oil producing areas, in particular, for remediation of dry digging pits and disturbed lands, with the restoration of topography and soil fertility, as well as associated with the disposal of toxic waste drilling cuttings.

Known composition (A.S. USSR №1247388 A1 from 30.07.86; COMPOSITION FOR RECLAIMING DISTURBED LANDS), which contains in its composition: peat - 20-50% (by weight), glauconitic sand - 22-68%, and phosphorite ore - 8-16%, dictionary slate - 4-16%.

The disadvantage of the composition is that it has an increased consumption of high-quality sand and peat - 72-88% (by weight), and requires the introduction of costly and scarce additives, phosphate ore and dictionaraoke slate.

Closest to the proposed composition, selected as a prototype, is the composition (A.S. USSR №1585314 A1 from 15.08.90; the COMPOSITION TO neutralize the OIL POLLUTION of SOIL that contains peat - 22-26% (by weight), the spent clay mud (ARR) - 34-56%, filtrability 16-30%), and lime - 5-7%, nitrilotriacetate acid is 1-3%.

For reasons that impede the achievement of specified following technical result is that insufficient composition contains a significant amount of toxic waste drilling - clicks, which liquid is Thodol (unlike drilling sludge)and a complex required for this substance, capable of neutralizing the action of pollutants (hydrocarbons and heavy metal ions), especially in liquid medium. The inclusion in the composition prototype acidic and alkaline reagents complicates the regulation and the right (optimal for fertility) pH environment. Active additives (filterproc, lime, NTF), enter in large numbers, by themselves, pose a threat of environmental pollution.

The objective of the invention is to increase the effectiveness of revegetation associated with the safe recycling of hazardous waste drill cuttings, and reducing consumption of scarce, high-quality soil (sand and peat).

The technical result is to eliminate pits and restoration of topsoil, recycling industrial waste drill cuttings, reducing the cost of the composition, the improvement of the environment.

The problem is solved in that the composition contains as filler and sorbent peat-sand mixture (ratio of peat and sand 1:1) - 49-69% (by volume), 50-30% cuttings of well construction (by volume) and up to 1% of the supplements necessary to reduce the concentration of soluble petroleum products, toxic waste and neutralization of the acid reaction medium peat (with pH increasing from 3-4 to 6-7,5):

a) quicklime is I - 0,6-0,8%,

"SOILEX" - 0,12-0,15%,

"Degradates" - the rest,

or

b) Sorbent "Unipolar" of 0.4 - 0.6%

Biochemical drug "Multienzyme complex UNI-REM" - 0,6-0,4%

The present invention is as follows. For example, for remediation of dry digging pit on the ground preparing two mixtures: No. 1 - peat-sand 1:1 (by volume) of 100%, then 95% of the mixture No. 1 (the number depends on the area and depth of career) preparing a mixture of No. 2 by adding to the mixture No. 1 cuttings in the amount of 50% of the total volume of the mixture No. 2, brought to optimum moisture content for more effective mixing and subsequent seal, then entered active additives that reduce the toxicity of cuttings (% of total mixture): quicklime - 0,75%, "SOILEX" to 0.15%, "Degradates" - by 0.1%.

Preparation and laying of the mixture by conventional road construction equipment, earth-moving machines, excavators, dump trucks, loaders, bulldozers, graders, cutters, rollers. Dosing powder supplements are produced by tsementonositelem DS-72, the introduction of liquid additives (suspension UNI - REM) is watering machine PM - 130.

After accumulation of the mixture in the sample and exposure within 1-7 with for the passage of physico-chemical reactions, adsorption and neutralization is oxycanta the mixture using loaders or excavators placed into dump trucks and transported to the place of laying - previously developed career.

Uploaded mixture No. 2 level and is applied with a layer thickness of 0.3-0.5 m, then the composition is compacted in layers by pneumococci. This composition pit is filled up to a level of 0.3-0.5 m below the surface from the top to the ground level is laid a layer (0.3-0.5 m) mixture No. 1 (peat and sand).

This solution allows to increase the efficiency of remediation of pits and disturbed lands to reduce the need for high-quality soils and chemicals, dispose of drilling slurries with obtaining durable, environmentally friendly and with the fertility of the composition.

Sources of information

1. As the USSR №1247388 A1 from 30.07.86; COMPOSITION FOR REMEDIATION of OIL POLLUTION of SOILS; CL. From 09 To 17/00, And 01 In 79/00.

2. As the USSR №1585314 A1 from 15.08.90; the COMPOSITION TO neutralize the OIL POLLUTION of SOIL; CL. 09 K.

1. Composition for remediation of pits and disturbed lands, which includes trpoicana mixture and cuttings, characterized in that the content of the peat-sand mixture is 49-69% by volume, the ratio of sand and peat 1:1 by volume, the content of drill cuttings 50-30%, respectively, in the composition additionally introduced active neutralizing and reclaiming additives in an amount up to 1% by volume.

2. The composition according to claim 1, characterized in that the quality of the ve supplements are used from the total volume of the composition, %:

Quicklime0,6-0,8
"SOILEX"0,12-0,15
"Degradates"Rest

3. The composition according to claim 1, characterized in that as the supplements are used from the total volume of the composition, %:

Sorbent "Unipolar"0,4-0,6
Biochemical drug "Multienzyme
complex UNI-REM"0,6-0,4



 

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2 tbl

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3 tbl

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2 tbl

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