Coal mining subsidence area repairing method

Abstract

The invention provides a coal mining subsidence area repairing method. The coal mining subsidence area repairing method comprises the steps that dimensionality reduction is carried out on influence factors influencing earth surface residual settlement, key influence factors for determining universality are subjected to simplified research, a three-dimensional physical model is designed on the basis, and the main distribution positions of residual gaps in overlying strata can be determined on the basis of the physical model; and in combination with the obtained engineering geological environment of the coal mining subsidence area, the ground drilling hole position is determined, and grouting and filling are carried out on the main distribution positions of the residual gaps from the ground surface in a targeted mode.

Description

technical field [0001] The invention belongs to the field of coal mining, and in particular relates to a method for repairing a coal mining subsidence area. Background technique [0002] Mined-out areas are formed in the mining of coal resources, which causes the overlying strata to lose their lower support, and the original balance conditions are destroyed, resulting in movement, deformation, damage and collapse, which in turn causes a series of geological disasters such as ground subsidence and ground fissures ( figure 1 ). With the needs of economic development, national infrastructure construction is being accelerated. Highways, railways, bridges, tunnels and other facilities, industrial plants and civil buildings can be seen everywhere, while land resources are decreasing day by day. As a result, a certain Some large-scale construction projects must be carried out above the old goaf. Under the action of additional load, the rock mass in the collapsed fracture zone tha...

AI Technical Summary

Problems solved by technology

Under the action of additional load, the rock mass in the collapsed fracture zone that was originally in a relatively balanced state may be reactivated, resulting in the re-collapse, fragmentation, and movement of the overlying strata in the old mined-out area, which in turn will cause the ground surface to move again. Deformation, the foundation will appear in bad condition after being affected by this, and the stability will deteriorate, resulting in uneven settlement, cracking, tilting and even collapse of the building

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