A segmented gob-side entry retention method in fully mechanized mining/caving face

Abstract

The invention discloses a fully-mechanized coal mining / caving working face sectional type gob-side entry retaining method, which belongs to the field of mine support. The fully-mechanized coal mining / caving working face sectional type gob-side entry retaining method comprises the following steps: arranging an intake airway and a return airway on two sides of a stope face, and arranging an entry protection coal pillar between an outer-ring intake airway and an outer-ring return airway. The fully-mechanized coal mining / caving working face sectional type gob-side entry retaining method also comprises the following steps: reinforcing the support between the end hydraulic support of the stope face or on the rear top plate of the end hydraulic support; erecting a reinforcing mesh behind the end hydraulic support to assist in obturator forming; hanging a filling bag on the reinforcing mesh; arranging a hydropost on the periphery of the reinforcing mesh; filling evenly-mixed high-water material seriflux into the filling bag hung in the reinforcing mesh; after the filled seriflux is solidified, removing the hydropost; reinforcing the obturator to finish the construction of a falling wall; and filling and sealing gob-side entry retaining on the rear part of a connection roadway used for air return as well as the rear roadway and connection roadway. The fully-mechanized coal mining / caving working face sectional type gob-side entry retaining method has the advantages of simple technology, convenience in construction, easiness in mastering for workers, high obturator bearing capacity, big fracture surface, small underground auxiliary traffic volume and high safety and reliability.

Description

technical field [0001] The invention relates to a gob-side entry retaining method, in particular to a segmented gob-side entry entry method suitable for underground temporary or permanent support in fully mechanized mining / caving working faces. Background technique [0002] At present, the treatment of gas usually adopts comprehensive management methods such as drainage before mining, mining while mining, etc. However, for coal seams with strong adsorption and high gas content, it takes a long time to adopt the method of drainage, which often affects the mining face. Instead, some high-gas mines adopt the double U-shaped ventilation method, increase the air distribution volume, reduce the upper corner of the working face and the gas concentration of the return air channel, and achieve the goal of safe mining. [0003] In order to avoid excessive gas in the corners of the working face and in the return air trough, it is necessary to reserve a section of the return air trough ...

AI Technical Summary

Problems solved by technology

In the past, wooden piles were often used for roadway protection, which resulted in a large consumption of pit logs. Not only the cost of retaining the roadway was high, and it was not environmentally friendly, but also the wooden piles were flammable support products, which required high labor intensity for workers, heavy auxiliary transportation workload, and slow construction speed; At the same time, under the effect of the return wind behind the goaf and the rotation and sinking of the trough roof, the wooden piles with low support strength are prone to instability and damage, blocking the roadway retention, and affecting the smooth discharge of gas to the tile row roadway at the upper corner

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