祁东煤矿厚硬顶板回采巷道锚杆(索)式主动超前支护技术及应用

Technology and Application of Bolt(Cable)Type Active Advanced Support in Thick Hard Roof Mining Roadway in Qidong Coal Mine

针对我国当前被动式超前支护为主的超前支护形式难以匹配回采工作面自动化、少人化与智能化发展趋势这一问题,以8237工作面机巷为研究对象,提出了回采巷道主动式超前支护技术:在两巷超前区域采用主动式支护工艺,通过顶板损伤特征原位测试进行现场评估,采用FLAC^(3D)软件对比分析了无支护,无超前支护和主动式超前支护不同方案支护时的围岩应力演化与变形过程。矿压监测结果表明:巷道顶板最大下沉量32 mm,锚索受力最大变化量7 kN;主动式超前支护可显著提高围岩结构稳定性,确保工作面回采期间安全。

Aiming at China's current passive advance-support mainly in the form of advance-support is difficult to match the development trend of automation,less manpower and intelligence of the mining face.Taking the 8237 working face machine roadway as the research object,the active advanced support technology of the mining roadway is proposed:the active support technology is used in the advanced area of the two roadways,and the on-site evaluation is carried out through the in-situ test of the damage characteristics of the roof,and the FLAC^(3D)software is used for comparative analysis.Stress evolution and deformation process of surrounding rock under different support schemes without support,without advance support and active advance support.The mine pressure monitoring results show that the maximum approach of the roadway roof is 32 mm,and the maximum change of the anchor cable force is 7 kN;the active advance support can significantly improve the stability of the surrounding rock structure and ensure the safety of the working face during mining.