Abstract:

Taking the mining of thin coal seam and high gas coal face in Guizhou as the engineering

background，in order to improve the recovery rate of coal resources at the mining face，relieve the tension of

mining replacement and reduce the cost of roadway excavation，the technology of roof cutting and pressure

is proposed to be applied to roadway retention. According to the geological condition and layout of 1k302

transportation lane in Xinhongfa Coal Mine，the construction technology of top cutting and unloading pres⁃

sure relief retaining roadway on the working face of thin coal seam are introduced，and the effect top cutting

and pressive relief is analyzed by monitoring the subsidence of roof. The engineering application shows that

the roadway retention technology scheme adopted in 1k302 transport lane has remarkable effect，and the

maximum subsidence of the roof in the roadway retention section is controlled within 146.4 mm，and the

roadway retention effect is remarkable，which creates good conditions for safe and efficient coal mining in

the mine.

Key words:

thin coal seam, semi-coal rock roadway, top cutting pressure relief, gob-side entry retain?

ing