Method for controlling ground surface subsidence through coal mining filling

Abstract

The invention discloses a method for controlling ground surface subsidence through coal mining filling. The method comprises the following steps that the load of each rock stratum is calculated according to the physical and mechanical properties of mine rock strata, if the load of the corresponding rock stratum is smaller than the load of the lower-layer rock stratum, the corresponding rock stratum serves as a key stratum, and all the key strata are found out; the side face of a coal bed serves as a coalface, a filling support is arranged on the coalface, in the coal mining process, every timewhen the coalface is propelled by a distance, gangue filling strips are constructed in the propelling direction, caving top plate strips are formed through a caving method, and the gangue filling strips and the caving top plate strips are arranged at intervals; in the caving process, a bed separation space is formed; and the bed separation space is filled with a high-water material to form a high-water filling body, and a combined support system of the filling strips and the high-water filling body is realized. The method for controlling the ground surface subsidence through coal mining filling has the advantages that gangue filling and high-water material filling are combined so as to control the ground surface subsidence, and therefore the supporting effect is improved, and the cost islowered.

Description

technical field [0001] The invention belongs to the technical field of coal mine filling, and in particular relates to a method for coal mining filling to control surface subsidence. Background technique [0002] my country has a long history of coal mining and a wide range of development, especially in key coal-producing provinces such as Shanxi, where the intensity of development is relatively high, the area of ​​gobs left over from history is large, and the surface of gobs is severely damaged by subsidence. The longwall working face is one of the most common coal mining faces in my country, which has the advantages of high coal mining efficiency and less roadway excavation. [0003] In recent years, with the advancement of coal mine filling machinery, especially the successful development of a special support for the integration of fully mechanized mining and filling, there has emerged a technology that uses comprehensive mechanization for gangue filling, that is, compreh...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for coal mining filling to control surface subsidence. This method solves the problem of large amount of waste rock filling and high cost. Through the joint support of gangue filling strips and high water filling body, it has good Support effect, realize the control of surface settlement

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