Non-pitwood withdrawing method for hydraulic supports during fully mechanized face withdrawing

Abstract

The invention discloses a non-pitwood withdrawing method for hydraulic supports during fully mechanized face withdrawing. According to the method, a withdrawing lane, hydraulic supports, single hydraulic props and mobile-supporting shield hydraulic supports are mainly included. The method is characterized in that the recyclable single hydraulic prop capable of being repeatedly utilized is adopted for replacing a raw wood mass point pillar supporting top plate, meanwhile, the two fully mechanized face mobile-supporting shield hydraulic supports are adopted as mobile supporting platforms used for withdrawing of other hydraulic supports, and top plates of a haulback region sequentially withdraw the other hydraulic supports after the supporting hydraulic supports are withdrawn; in the withdrawing process, the two mobile-supporting shield hydraulic supports are pulled by means of the cooperation of a self-moving function and slow winching to move upwards in a staggered mode, then, false roofs laid by net ropes of the haulback region slowly sink, and the phenomenon that pressure is exerted on the top plates suddenly and the top plates fall down to the haulback region is avoided, so that the safety is improved, and no pitwood consumption is generated. According to the non-pitwood withdrawing method, safe and rapid withdrawing of the fully mechanized face hydraulic supports can be achieved, and the safety of the hydraulic support withdrawing operation is greatly improved.

Description

technical field [0001] The invention relates to a retraction technology of fully mechanized mining equipment, in particular to a method for retracting a hydraulic support without pit logs when a fully mechanized mining face is retracted. Background technique [0002] Comprehensive mechanized coal mining is the most common coal mining method. The equipment in the fully mechanized mining face generally tends to be large-scale. , scraper conveyor, hydraulic support. Because the equipment in the fully mechanized mining face is generally large-scale equipment, and relatively cumbersome, the retraction workload is heavy. The traditional retraction method generally adopts single hydraulic props and wooden point columns to support the roof, which has many unfavorable factors such as many transportation links, low transportation efficiency, great safety threats, low reliability of wooden point column supports, and non-recyclable wood. The construction period is often not effectivel...

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Problems solved by technology

[0004] The patent application number 201210331892.4 discloses an improved hydraulic support retraction process in fully mechanized mining face. In the process of moving forward the three cover supports, but in the process of withdrawing the hydraulic support by using this process, wooden materials are still used to maintain the roof of the original position after the cover support is lowered. There is a big threat to construction safety and the reliability of wooden point column support Unfavorable factors such as low height and non-recyclable wood

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