采矿与安全工程学报 ›› 2015, Vol. 32 ›› Issue (6): 929-935.

• 论文 • 上一篇    下一篇

错层位巷道围岩能量耗散分析

  

  1. 1.黑龙江科技大学黑龙江省普通高校采矿工程重点实验室,黑龙江哈尔滨 150022; 2.中国矿业大学(北京)资源与安全工程学院,北京 100083
  • 收稿日期:2014-04-28 出版日期:2015-11-15 发布日期:2015-12-04
  • 作者简介:张俊文(1977—),男,内蒙古自治区凉城县人,副教授,博士,硕士生导师,主要从事矿山压力与岩层控制方面的研究。
  • 基金资助:

    国家自然科学基金项目(51574114);黑龙江教育厅基金项目(12531570);黑龙江省普通高校采矿工程重点实验室开放课题项目 (2013-KF05);中国博士后科学基金项目(2014M551290);黑龙江省博士后科学基金项目(LBH-Z13208)

Analysis of energy dissipation for stagger arrangement roadway surrounding rock

  • Received:2014-04-28 Online:2015-11-15 Published:2015-12-04

摘要: 在分析巷道侧向煤体破裂区、塑性区及弹性应力升高区外力功表达式的基础上,根据热力学第一定律,分别得到了对应分区的耗散能理论计算公式。根据围岩能量耗散值与外力对系统做功的比值确定了损伤变量,得出了破裂区损伤值>塑性区损伤值>弹性应力升高区损伤值的结论;对应于能量耗散,又得出了破裂区能量耗散>塑性区能量耗散>弹性应力升高区能量耗散的结论。镇城底矿错层位巷道布置工作面实测表明,布置于破裂区的巷道支承压力较小,巷道较易维护;当巷道上方为松散矸石,在支承压力作用下,松散矸石发生压密变形和塑性变形,其能量耗散更大,巷道更易维护。

关键词: 能量耗散, 错层位, 巷道

Abstract: Based on the analysis of the expression of the external work in lateral coal fractured zone, plastic zone and increasing zone of elastic stress, the corresponding energy dissipation formulas have been deduced, applying the first law of thermodynamics. The damage variable which is the ratio of energy dissipation value and external forces work for surrounding rock has been determined. Consequently, conclusions have been drawn that damage variable continuously decreases from fractured zone to plastic zone, till to increasing zone of elastic stress. For energy dissipation, it is similar to damage variable. Mineral pressure observation of stagger arrangement workface in Zhenchengdi mine shows that roadway has less support pressure in fractured zone, making it easy to maintain. When loose gangue is above roadway, it will produce compression deformation and plastic deformation under the action of support pressure. Its energy dissipation is bigger, making it easier to maintain.

Key words: energy dissipation, stagger arrangement, roadway