力学与实践 ›› 2020, Vol. 42 ›› Issue (3): 300-305.DOI: 10.6052/1000-0879-19-367

• 应用研究 • 上一篇    下一篇

矩形巷道围岩弹性变形能积聚特征分析1)

杨丹*,2), 刘洋†,3)   

  1. *大同煤炭职业技术学院,山西大同 037000;
    中煤能源研究院有限责任公司,西安 710054
  • 收稿日期:2019-10-10 修回日期:2020-02-19 出版日期:2020-06-20 发布日期:2020-06-29
  • 通讯作者: 3) 刘洋,工程师,研究方向为矿山压力与控制。 E-mail: 457219480@qq.com
  • 作者简介:2) 杨丹,讲师,研究方向为煤矿安全的教学及科研。 E-mail: 383466628@qq.com
  • 基金资助:
    1) 山西省教育科学”十三五”规划”1331工程”研究专项课题(ZX18155)资助项目

ANALYSIS OF ACCUMULATION CHARACTERISTICS OF ELASTIC DEFORMATION ENERGY OF SURROUNDING ROCK IN RECTANGULAR ROADWAY1)

YANG Dan*,2), LIU Yang†,3)   

  1. *Datong Vocational and Technical College of Coal, Datong 037000, Shanxi, China;
    China Coal Energy Research Institute Co. Ltd, Xi'an 710054, China
  • Received:2019-10-10 Revised:2020-02-19 Online:2020-06-20 Published:2020-06-29

摘要: 煤矿冲击地压主要发生在巷道中,其主要原因之一是巷道围岩积聚了大量的弹性能。为得出矩形巷道围岩弹性变形能积聚特征,降低巷道支护成本,推导了巷道冲击破坏失稳能量准则,并建立了矩形巷道围岩能量积聚计算模型,理论分析了采深、巷道断面尺寸和煤层厚度对矩形巷道围岩能量积聚影响规律,得出:矩形巷道积聚的弹性能随采深的增加而增大,采深越深,巷道积聚的弹性能增长速率越快。巷道围岩积聚能量随巷道断面尺寸增加而增大。当煤层厚度小于巷道影响范围时,巷道积聚能量随煤层厚度增加而增大。在实际工程中,尽可能减小巷道断面尺寸,尽可能沿顶、底板布置巷道。研究结果为冲击地压巷道布置和降低巷道支护成本提供了理论依据。

关键词: 矩形巷道, 能量积聚, 煤层厚度, 断面尺寸, 开采深度

Abstract: The coal mine impact ground pressure mainly occurs in the roadway. One of the main reasons is that a large amount of elastic energy is accumulated in the surrounding rock of the roadway. In order to obtain the characteristics of the elastic deformation energy accumulation of the surrounding rock of the rectangular roadway and to reduce the cost of the roadway support, the energy criterion of the roadway impact failure is established, and the calculation model of the surrounding rock energy accumulation of the rectangular roadway is built. The influence of the mining depth, the section size of the roadway and the thickness of the coal seam on the energy accumulation of the surrounding rock in the rectangular roadway is analyzed. It is concluded that for the rectangular roadway, the elastic energy increases with the increase of the depth of mining; the deeper the depth of the mining, the faster the growth rate of the elastic energy accumulated in the roadway; the energy accumulated in the surrounding rock of the roadway increases with the increase of the section size of the roadway; and when the thickness of the coal seam is less than the influence range of the roadway, the accumulation energy of the roadway increases as the thickness of the coal seam increases. In the actual project, the section size of the roadway should be reduced as much as possible, and the roadway is better arranged along the top and the bottom as far as possible. The research results provide a theoretical basis for the layout of the rockburst roadways and the reduction of the roadway support costs.

Key words: rectangular roadway, energy accumulation, coal seam thickness, section size, mining depth

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