摘要
为了深入研究深部特厚煤层动压巷道的来压规律,采用理论分析、数值模拟和现场实测对其进行了分析。理论分析表明顶板的下沉、巷帮的稳定性、巷道周围的应力与断面积大小有关;数值模拟发现在工作面前方50 m会受到采动影响,在滞后工作面后方50 m内应力变化更剧烈,50-150 m仍有应力增加;现场实测发现14103巷道受相邻工作面的影响剧烈区为超前工作面47 m,受本工作面的影响剧烈区为超前工作面8 m范围内。采用高预紧力、高强度的锚杆对深部煤层支护,对煤体残余强度进行了加强。
In order to study pressure law of dynamic pressure roadway in deep thick coal seam, theory analysis, numericalsimulation and fieldt were used to analyze it. The results showed that roof subsidence, roadway stability andstress around the tunnel were related to size of sectional area. The numerical simulation showed that 50 m distance in frontof working face was affected by mining, and the change would be more severe in 50 m behind lagging face, distance from 50m to 150 m still had stress increasing. The 14103 roadway was affected by adjacent working face and its intense area was 47m ahead of working face. The severe area affected by this working face was within 8 m ahead of working face. Highpreloading and high strength bolts was used in deep coal seam support, and coal seam residual strength was strengthened.
出处
《煤炭与化工》
CAS
2016年第11期90-93,共4页
Coal and Chemical Industry
关键词
动压巷道
来压规律
高预紧力
dynamic pressure roadway
pressure law
high preloading force
