Gob-side entry retaining double-layer sliding die filling method

Abstract

The invention provides a gob-side entry retaining double-layer sliding die filling method which comprises the following steps of: 1, fixedly connecting a filling cavity to a hydraulic bracket by a rigid connecting rod; 2, starting a coal miner to begin digging; 3, when the coal miner finishes digging in the current digging region, driving the hydraulic bracket to advance, meanwhile, driving the sleeve to advance but leaving an inner filling cavity at an original position; 4, when the hydraulic bracket advances to a support position, stopping advancing and beginning digging by the coal miner; 5, rotating a flap of the inner filling cavity to a put-down position; 6, beginning filling; 7, rotating the flap to a retracted position, opening a locking mechanism between the sleeve and the inner filling cavity, and starting a traction oil cylinder arranged between the sleeve and the inner filling cavity to draw the inner filling cavity in the sleeve; 8, closing the locking mechanism between the sleeve and the inner filling cavity so as to lock the relative positions of the sleeve and the inner filling cavity; and 9, repeating the steps until the current work place is dug completely.

Description

technical field [0001] The invention relates to an automatic wall-forming method for gob-side entry retention, in particular to a method for filling a sidewall filling wall using a double-layer structure formwork. Background technique [0002] At present, when the gob-side roadway retention technology is adopted in the coal mining face, the construction of the roadside filling wall usually requires manual construction of formwork, and the wet concrete spraying machine sprays gangue concrete into the formwork of the roadside filling wall. The formwork was removed manually, and the filling wall for the next section was rebuilt. Due to the solidification time, the built formwork cannot be reused, and the formwork on both sides of the filling wall needs to be rebuilt every time it is built, which is time-consuming and laborious, the degree of mechanization is low, and safety accidents are prone to occur, which seriously affects the safe and efficient production of coal mines. ...

AI Technical Summary

Problems solved by technology

Due to the solidification time, the built formwork cannot be reused, and the formwork on both sides of the filling wall needs to be rebuilt every time it is built, which is time-consuming and laborious, the degree of mechanization is low, and safety accidents are prone to occur, which seriously affects the safety and efficiency of coal mine production.

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