煤炭工程 ›› 2017, Vol. 49 ›› Issue (4): 77-81.doi: 10.11799/ce201704024

• 研究探讨 • 上一篇    下一篇

干河矿煤巷锚杆支护力学模型及数值分析

田亮1,单仁亮2,王凯1,李民族1   

  1. 1. 中国矿业大学(北京)
    2. 中国矿业大学(北京)力学与建筑工程学院
  • 收稿日期:2016-05-23 修回日期:2016-07-16 出版日期:2017-04-09 发布日期:2017-05-16
  • 通讯作者: 田亮 E-mail:cumtbtianl@126.com

Mechanical model and numerical optimization of bolt support for roadway in bound coal by Wongawilli mining method

  • Received:2016-05-23 Revised:2016-07-16 Online:2017-04-09 Published:2017-05-16

摘要: 旺采法中采场巷道服务时间各不相同,为了使支护设计具有针对性,利用力学和数值模型分析了煤巷变形特点。根据“岩梁”理论,建立煤巷顶板力学模型,获得了顶板岩层厚度与煤巷跨度、直接顶容许拉应力之间的双曲关系。结合FLAC3D,分析了支护部位不同时围岩及锚杆力学响应,明确了煤巷支护的重点是角部和两帮,单独进行两帮支护对围岩的控制效果优于单独顶板支护,支巷两帮可以采用玻璃钢锚杆。分析了锚杆参数对围岩的影响规律,证明加强两帮支护可以实现“强帮护顶”,帮锚杆长度存在最优值。

关键词: 旺格维利采煤法, 煤巷, 岩梁, 玻璃钢锚杆, 数值模拟

Abstract: The support designs of coal roadways ought to be targeted, because their use and service time are all different in Wongawilli mining area. Rules of roadway deformation was analyzed by mechanical models and numerical models. Based on the theory of rock beam, the mechanical model of roof was founded. These parameters, thickness of rock beam, width of roadway and allowable tensile stress of roof, meet with hyperbolic curve. Combined with FLAC3D, four kinds of support were analyzed. By analyzing support effect to surrounding rock and bolts, the corners and sides of roadway are determined to be key positions of roadway support. According to data of rock deformation, sides support is better than roof support only. FRP bolts can be used for sides support in branch roadway. The effect of bolts parameters to rock deformation were studied, the results show that strengthening sides support is useful to stability of roof rock, and there is a optimum value to length of side-bolts.

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