Combined support shield type comprehensive mining method

Abstract

The invention provides a combined support shield type comprehensive mining method. A combined support of the method ascends and descends through a jack, prestress is applied to the combined support, long-term bearing is achieved through lifting nuts and supporting threaded rods, the supporting height is adjusted by combining base plates and sole timber with the supporting threaded rods, the overall structure is simple, machining and manufacturing are easy, the supporting cost is reduced, on-site operation is easy and convenient, and the method can adapt to small and medium-sized mines. Compared with an existing comprehensive mining method and a room-and-pillar method, the combined support shield type comprehensive mining method is free of ore pillar losses, and the index that the loss ratio and the dilution ratio are close to zero can be met. Compared with an existing wall type caving method, an operation space is supported more safely and stably by the combined support, on-site following-up and moving and long-term repeated application of the combined support are more reliable and convenient, and caving treatment measures of the combined support for a goaf are more appropriate and safer.

Description

[0001] Technical field: [0002] This application belongs to the technical field of mining. [0003] technical background: [0004] The mining method of this application is mainly used for horizontal-gently inclined thin-medium-thick ore bodies; for this type of ore body, the current mining methods in non-coal mines are mainly comprehensive method, room-and-pillar method and wall caving method, while coal mines are mainly The hydraulic prop fully mechanized mining method is adopted; the main defects of the comprehensive method and the room-and-pillar method are the loss of pillars and the hidden dangers left in the goaf; the main defects of the wall caving method are the low bearing capacity of the prop and unsafe recovery; the hydraulic prop fully mechanized mining method The disadvantage is that it is not suitable for the blasting method mining of non-coal mines; the combined support shield type comprehensive mining method of the present application aims to overcome the limit...

AI Technical Summary

Problems solved by technology

[0004] The mining method of this application is mainly used for thin-medium-thick ore bodies with horizontal-gentle inclination; for this type of ore bodies, the current mining methods in non-coal mines are mainly comprehensive method, room-and-pillar method and wall caving method, while coal mines are mainly The hydraulic prop fully mechanized mining method is adopted; the main defects of the comprehensive method and the room and pillar method are the loss of pillars and the hidden dangers left in the goaf; the main defects of the wall caving method are the low bearing capacity of the prop and unsafe recovery; the hydraulic prop fully mechanized mining method The disadvantage is that it is not suitable for the blasting method mining of non-coal mines; the combined support shield type comprehensive mining method of the present application aims to overcome the limitations of the above mining methods, and utilize the super strong supporting capacity and strong damage resistance of the combined support. Realize high-efficiency mining with no-loss or very-low-loss dilution that can adapt to mechanical and blasting operations

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