采矿与安全工程学报 ›› 2012, Vol. 29 ›› Issue (2): 220-225.

• 论文 • 上一篇    下一篇

上行开采顶板煤巷围岩稳定性控制技术研究

  

  1. 1. 河南理工大学能源科学与工程学院,河南 焦作  454003;
    2.煤炭科学研究总院安全装备技术研究分院,北京  100013;
    3.中国矿业大学煤炭资源与安全开采国家重点实验室,矿业工程学院,江苏 徐州  221116
  • 收稿日期:2011-09-11 出版日期:2012-03-15 发布日期:2011-12-22
  • 作者简介:王成(1984-),男,安徽省含山县人,博士,讲师,从事巷道矿压理论及其控制技术、深井煤与瓦斯共采方面的研究。 E-mail:wangchengcumt@163.com Tel:15838905979
  • 基金资助:

    国家重点基础研究发展计划(973)项目(2011CB201200);国家自然科学基金青年科学基金项目(50904064)

Study on Surrounding Rock Control for Mining Roadway of the Overlying Protected Seam in Ascending De-Stressed Mining

  • Received:2011-09-11 Online:2012-03-15 Published:2011-12-22

摘要: 针对淮南矿区煤层群上行卸压开采被保护层回采巷道围岩控制的技术难题,采用数值模拟和物理模拟方法研究了下部煤层卸压开采后顶板巷道应力场和裂隙场时空演化规律,以及卸压开采动压影响条件下,复合顶厚度小于锚杆锚固范围、复合顶厚度与锚杆锚固范围相当、复合顶厚度大于锚杆锚固范围时巷道变形破坏规律,结果表明:下伏采动和巷道掘进形成的叠加应力决定巷道围岩应力分布和裂隙演化特征,锚杆支护能够优化围岩的应力场和裂隙场,保证围岩整体结构稳定;复合顶厚度大于锚杆锚固范围的巷道安全状况最差,巷道变形破坏最严重。在此基础上提出了保障顶板安全、加固两帮、强化关键区域、增大锚固范围的控制原则,给出了以新型“三高”锚杆为基础的立体式锚索梁承载结构组合支护技术,并成功应用于工程实践,取得了良好的支护效果。

关键词: 上行开采;顶板巷道;新型&ldquo, 三高&rdquo, 锚杆;立体式锚索梁承载结构

Abstract: Surrounding rock control in the overlying protected coal seam is a challenging topic of de-stressed mining of multi-seams.Based on current research on roadway control,a numerical simulation model was established to study stress field and fissure field before and after roadway excavation during underlying mining.Meantime,a physical simulation mode with the complex textured-roof and varying thickness was used to study roadway instability and collapse caused by dynamic pressure as well.The results show that when thickness of the roof is bigger than that of the bolted depth. The roadway situation is in the worst and the roof has the greatest possibility to lose its stability.Then a series of control principles have been proposed,such as strengthening roof,reinforcing both sides,strengthening the key area and strengthening bolted area.Therefore, combined supporting technique of tridimensional cable bolt beam structure based on new “three-high” bolt has been put them into practice finally,which showed that a better supporting effect was obtained.

Key words: ascending mining;roof roadway;new “three-high&rdquo, bolt;tridimensional cable bolt beam structure