厚煤层孤岛综放工作面回采巷道支护技术应用

Application of Support Technology for Stoping Roadway in Thick Seam Island of Fully Mechanized Caving Face

3205工作面为孤岛工作面,矿压显现较为剧烈。3205运输顺槽与回风顺槽掘进期间采用高强锚网与锚索联合支护,工作面回采期间进行补强支护及超前支护。对巷道支护参数进行设计,并在工作面回采期间进行矿压监测。结果表明:巷道在现有支护方案下,回采期间巷道表面位移及深部位移满足巷道使用要求,超前支承压力影响区域为50 m,峰值约在煤壁前方8 m的位置出现。

With severe strata behaviour,3205 working face is an island working face.During the tunnelling of the 3205 transportation and return airways,combined support of high-strength anchor nets and anchor cables are used to reinforce and advance support.Support parameters of the roadway are designed and mine pressure is monitored during the mining.Results show that under the existing support scheme of the roadway,the surface displacement and deep displacement of the roadway during the mining period meet the requirements of the roadway,the influence area of the leading support pressure is 50 m,and the peak value appears about 8 m in front of the coal wall.