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Transformation method for waste dump micro-landform of large opencast coal mine in loess area

A technology for open-pit coal mines and dumps, applied in excavation, construction, infrastructure engineering, etc., can solve problems such as difficulty in surface runoff drainage, hidden dangers of dump stability, and blockage of drainage ditches

Inactive Publication Date: 2013-01-23
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the original drainage ditches are easily blocked by soil-rock mixed materials, which makes it difficult to discharge the surface runoff. In addition, the cracks generated by the uneven settlement of the dump site make the precipitation seep down quickly along the cracks, and it is easy to form large pores and blind water on the dump site. holes, etc., the surface runoff gathers into the large pores and blind holes and flows into the deep layer or even the basement of the dump, which becomes a hidden danger to the stability of the dump

Method used

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  • Transformation method for waste dump micro-landform of large opencast coal mine in loess area
  • Transformation method for waste dump micro-landform of large opencast coal mine in loess area
  • Transformation method for waste dump micro-landform of large opencast coal mine in loess area

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Embodiment 1

[0043] Such as Figure 5 Design drawing of typical field plots for micro-topographic reconstruction of Antaibao internal dump;

[0044] In 2011, the reclamation area of ​​Antaibao internal dump was 63.40hm 2 , which is the top platform of the dump, the platform elevation is about 1480m, and the side slope is 30m high. The entire reclamation area is divided into 16 water storage units through field road 1 and production road 2 to carry out micro-terrain reconstruction, and a water retaining wall 7 is built on the side of the slope shoulder length direction of the top platform, and the water retaining wall 7 is built in the field Road storage ditches 4 are arranged on both sides of the road 1 and the production road 2, and field ridges are arranged in the water storage units.

[0045] Take a field 8 on the top platform of the dump in Antaibao as an example. The field is 250m long, 150m wide, and has a total area of ​​37,500m 2 The length of the field road is 150m, and the len...

Embodiment 2

[0049] Such as Figure 6 Design drawing of typical field plots for micro-topographic reconstruction of dump site in Anjialing;

[0050] In 2011, the reclamation area of ​​Anjialing internal dump was 171.51hm 2 , divided into three steps, the highest platform elevation is about 1420m, and the lowest platform elevation is about 1340m. Through field road 1 and production road 2, the entire reclamation area is divided into 26 water storage units for micro-terrain reconstruction, four projects of water retaining wall 7, road water storage ditch 4 and field ridge 5.

[0051] Taking a field on the top platform of the dump in Anjialing as an example, the field is 250m long, 150m wide, and has a total area of ​​37,500m 2 The total length of the field road is 400m, and the length of the production road is 250m. The slope protection forest 9 and the slope storage ditch 10 are arranged on both sides of the field road 1 and the production road 2; And slope storage ditch 10.

[0052] Th...

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Abstract

The invention relates to a transformation method for the waste dump micro-landform of a large opencast coal mine in a loess area. The transformation method comprises the following steps of: firstly, locally flattening the earth after the waste dump is dumped in place, building a slope shoulder retention wall, and arranging field roads and production roads on a platform to divide the platform into large field parcels; secondly, dividing the large field parcels into a plurality of small field parcels by ridges; thirdly, shaping the ground surface by a method of bulldozing to enable the ground elevations of the small field parcels at the periphery to be sequentially higher than those of the small field parcels at the interior; and finally, building road water storage ditches and side slope water storage ditches of the waste dump to form circular and continuous mode for water storage. By the transformation method of the micro-landform, direct surface runoff of the waste dump is prevented from being generated, water seepage is increased, the water and soil loss due to water converging is prevented, the stability of the waste dump is ensured, and limited water resources are efficiently used.

Description

technical field [0001] The invention relates to a method for micro-topographic reconstruction of an open-pit mine dump in the loess area, which is mainly used for large-scale open-pit coal mine dumps in the loess plateau area where the climate is dry and the ecological environment is fragile. Background technique [0002] The Loess Plateau covers a vast area and spans the seven provinces of Shanxi, Shanxi, Gansu, Ningxia, Inner Mongolia, Qinghai and Henan. The annual precipitation is 150-800mm, mostly concentrated in June-September, and its total precipitation accounts for 55% of the annual precipitation. % to 78%, which belongs to the typical continental monsoon climate characteristics, cold in winter, warm and humid in summer, with simultaneous rain and heat. Rich in light energy, the total annual radiation is 50.2~67.0×104J·cm -2 . The annual average temperature is 3.6~14.3℃, and its horizontal distribution and vertical distribution are very different. The annual evapo...

Claims

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Application Information

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IPC IPC(8): E02D17/20
Inventor 王金满白中科周伟叶驰驱张召薛玉芬严慎纯杨睿璇
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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