Thick-bed mining subsidence-land dynamic pre-reclamation method at plane mining-area

Abstract

The invention discloses a dynamic pre-reclamation method for subsided land caused by exploiting a high seam in a plane mining area, which belongs to the technical field of mining and is used for solving the land reclamation problem of the subsided land caused by unstable subsidence mining. The dynamic pre-reclamation method is carried out when a mining subside is not complete and seeper is not formed; the dynamic pre-reclamation method consists of two stages: engineering design calculation and engineering implementation according to the scale, range and target needed to be reclaimed. The stage of engineering design calculation comprises the steps of: calculating a predicated subsidence, dividing the construction field pieces, confirming the construction parameters and the like. Compared with the prior art of 'first destroying and then controlling', the dynamic pre-reclamation method has the following advantages that the dynamic pre-reclamation realizes the full and effective combination of miming and reclamation, can reduce the reclamation investment, shorten the reclamation period, increase the reclamation benefit, and can promote the sustainable utilization of land resources in a mining area and the sustainable development of the mining area, can effectively ease the deterioration of the ecological environment in the mining area caused by the vegetation deterioration due to the mining subsidence and water and soil loss and most extensively protect the land resources.

Description

technical field [0001] The invention relates to a technical method for reclamation of subsidence land in coal mining, in particular to a method for reclamation of unsettled subsidence land or subsidence land reclamation in thick coal seam mining areas with high water level in plains, and belongs to the field of mining technology. Background technique [0002] At present, the land reclamation method in the coal mine subsidence area is to treat it after the subsidence, that is, destroy it first and then treat it. The implementation steps of this reclamation technology are mainly: 1. Delineate the scope of reclamation, and evaluate the mining stability of this area; 2. On-site measurement and drawing, including waterlogged areas and land; 4. Finally, carry out a construction according to the planning drawing. Since this technical method is carried out after the coal mining is completely destroyed and the subsidence land is stable, water accumulation areas have been formed in t...

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Problems solved by technology

Since this technical method is carried out after the coal mining is completely destroyed and the subsidence land is stable, water accumulation areas have been formed in the high water level area of ​​the plain, which leads to high cost and low efficiency of the entire reclamation project, and the land quality after reclamation is poor , the specific problems are reflected in the following aspects: 1. The reclamation project is difficult, and surface water makes it difficult to map and implement the project, and most of the earthworks are underwater projects; 2. The project cost increases, and the unit cost of underwater earthworks increases significantly; 3. The construction environment is poor, and the traffic, water conservancy, and electric facilities in the project area will be damaged due to the subsidence, and the construction conditions of the earthwork will become worse after the land is flooded; 4. The soil properties will become worse after the subsidence and waterlogging, and the quality of the reclaimed cultivated land will decline; 5. Reclamation is separated from coal mining, and the accumulated water and silt make the reclamation construction period longer, with low efficiency and poor benefits

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