Restoration method for coal mine giant collapse pits

Abstract

The invention discloses a restoration method for coal mine giant collapse pits. The method comprises the steps that whether the coal mine giant collapse pits are collapse pits in a zone with the relative height difference or collapse pits in a zone without the relative height difference are judged according to the topographic relief degree of the coal mine giant collapse pit, the collapse pits in the zone with the relative height difference and the collapse pits in the zone without the relative height difference are subjected to primary backfilling separately; water is sprayed to the giant collapse pits subjected to primary backfilling; and the collapse pits are subjected to secondary backfilling until the backfilling height in the pits is equal to the surface elevation. Through the mode that the collapse pits in the zone with the relative height difference adopts the different backfilling technologies, and solid waste backfilling is conducted in the relative low positions, so that the collapse pit governing efficiency is ensured, the bulldozing operation backfilling is conducted in the relative high positions, ground fractures around the collapse pits are restored, the collapse pits are backfilled, and the restoration effect of the collapse pits is ensured.

Description

technical field [0001] The invention relates to technical fields such as mining, restoration and utilization of land and mine geological environments, and in particular to a restoration method for a giant collapsed pit in a coal mine. Background technique [0002] China's proven reserves of coal resources rank third in the world, but my country's total coal consumption ranks first in the world. The large-scale and high-intensity coal mining industry for many years has gradually intensified the contradiction between the mine geological environment and the mine environmental geological problems induced by coal mining. As the carrying capacity of the geological environment gradually decreases, more and more mine environmental geological problems appear on the surface of the coal mining area. The geological problems of the mine environment are numerous and have a wide range of influences, which have a bad impact on the mine geological environment. The original beautiful homela...

AI Technical Summary

Problems solved by technology

At present, there are relatively few studies on the restoration and treatment of giant subsidence pits caused by coal in my country, mainly focusing on direct surface backfilling, and there is a lack of systematic understanding in the selection of backfill materials, the control of secondary deformation, and the repeated surface soil in the repair area.

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