03#层二采区北翼轨道巷超前地质探测及支护技术研究

Study on Advance Geological Exploration and Support Technology of Track Roadway in North Wing of No.2 Mining Area in the 03#Coal Seam

为了保证北翼轨道大巷的安全掘进,采用DTC-150对巷道地质条件进行超前探测,得到迎头前方65~74 m范围内煤岩体较为破碎,迎头前方136~138 m范围内存在断层构造。在探测到的构造区域,在原锚杆+锚网+钢筋梯子梁支护前提下,采用单体液压支柱+工字钢、注浆加固进行补强支护。通过监测巷道围岩变形量可知,支护效果良好。

In order to ensure the safe driving of the north wing track roadway,DTC-150 is used to detect the geological conditions of the roadway in advance.It is found that the coal and rock mass is relatively broken in the range of 65-74 m in front of head-on,and there is a fault structure in the range of 136-138 m in front of head-on.In the detected structural area,under the premise of original bolt+anchor net+steel ladder beam support,single hydraulic prop+I-steel and grouting reinforcement are adopted to reinforce and support.By monitoring the surrounding rock deformation of the roadway,the supporting effect is good.