Application Research of Gob-side Roadway Driving with Narrow Coal Pillar in Outburst Coal Seam
CHEN Caixian
SU Jing
TANG Zhu
LI Wenbin
Abstract：In order to reduce the outburst danger in the coal roadway driving and improve the drivage efficiency of the roadway, gob-side roadway driving technology by presetting 5 m-wide coal pillar was practiced in No. 41113 return airway in C11 outburst seam of Shuicheng Coal Mining Area, and meanwhile the support pattern by using shotcrete and bolting wire mesh was adopted, the maximum driving rate of the return airway was 145 m/month, the gas emission quantity was 1. 58 m3/min, the gas concentration was 0. 54%, the borehole collation index K1 was 0. 384 1 mL/( g · min1/2 ) and Smax was 2. 5 kg/m. The application of this technology showed that the gob-side entry driving by presetting narrow coal pillar only need to take safety protection measures for the driving, so it can reduce the engineering quantity of outburst prevention, speed up the roadway driving, improve the recovery rate of coal resources and ensure the safety and high efficient product of the outburst coal seam.
Keywords：outburst coal seamoutburst dangernarrow coal pillargob-side roadway drivinggas emissionoutburst prevention
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 81-83,91 )