Device and method for controlling roof subsidence of goaf with beam-column composite structure

Abstract

The invention discloses a device and a method for controlling sinking of a top plate of a worked-out section by adopting a beam-column combined structure. Pier column type filling templates are mounted at the worked-out section, filling is performed, filling columns are formed by the pier column type filling templates, and a prestress truss and anchor rope device is mounted between every two adjacent filling columns; trusses and anchor ropes are used for controlling the top plate among the filling columns, so that a combined supporting beam structure is formed, the combined beam and the filling columns form a beam-column combined control system together, a worked-out section top plate hanging roof area among the four filling columns adopts a two-way plate, the beam-column combined structure controls the two-way plate of the top plate to form a stable control system, the good control effect can be realized under the condition that the filling rate is not high, the filling mining cost can be reduced, and the mining efficiency can be improved.

Description

technical field [0001] The invention relates to a device and a method for controlling the subsidence of a goaf roof with a beam-column combined structure, belonging to the technical field of filling and mining. Background technique [0002] In order to control the surface subsidence caused by "three-down" coal mining and the damage to the environment caused by the long-arm caving coal mining method, coal mining enterprises have chosen the filling method of coal mining in recent years. The full-mining and full-filling coal mining technology has achieved a good control effect on surface subsidence and environmental damage, but there are also major deficiencies: First, because full-mining and full-filling requires a relatively large amount of filling space, the contradiction between the supply of filling materials and demand is relatively large. The material cost of the filling process is high; the second is because the filling workload is relatively large, which takes up the w...

AI Technical Summary

Problems solved by technology

The full-mining and full-filling coal mining technology has achieved a good control effect on surface subsidence and environmental damage, but there are also major deficiencies: First, because full-mining and full-filling requires a relatively large amount of filling space, the contradiction between the supply of filling materials and demand is relatively large. The material cost of the filling process is high; the second is because the filling workload is relatively large, which occupies the working time of the normal coal mining process, and the original production efficiency of the coal mining face is greatly reduced

Partial filling methods in the mined-out area mainly include strip filling and pier column filling. However, due to the existence of a suspended roof and a large amount of roof subsidence at the suspended roof, partial filling is not as effective in controlling surface subsidence as full mining and full filling, especially pier filling. Column filling, the filling rate is low, the suspended roof area is large, and the roof control effect is not ideal

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