Analysis on stability of pillar and stiff roof system in the gob area

详细信息    查看全文

• 作者：Hong Liu (1)
  Qian-ting Hu (1)
  Jin-an Wang (2)
  Jian-gong Li (1)
  
• 关键词：pillar ; irregular ; support conditions ; safety coefficient ; stiff roof ; stability
• 刊名：Journal of Coal Science and Engineering (China)
• 出版年：2009
• 出版时间：June 2009
• 年：2009
• 卷：15
• 期：2
• 页码：206-209
• 全文大小：381KB
• 参考文献：1. Jin Z M, Xu L S, 1994. Stiff roof control in coal mine. Beijing: China Coal Industry Publishing House.
  2. Qian M G, Miu X X, Xu J L, Mao X B, 2003. The key stratum theory in strata controlling. Xuzhou: China University of Mining and Technology Press.
  3. Qian M G, Shi X P, 2003. Mining pressure and strata control. Beijing: China University of Mining and Technology Press.
  4. Qu Q Z, 1999. Elastic plate theory. Beijing: China Communications Press.
  5. Song Y J, 2002. Hard massive roof technology of disaster control including hydraulic fracture and weakening in coal mine. Beijing: China Coal Industry Publishing House.
  6. Wang J A, Shang X C, Liu H, Hou Z Y, 2008. Study on fracture mechanism and catastrophic collapse of strong roof strata above the mined area. / Journal of China Coal Society, 33(8): 850-55.
  7. Wu L X, Wang J Z, Xing A H, 1994. Strip exploitation theory and practice under the construction. Xuzhou: China University of Mining and Technology Press.
  
• 作者单位：Hong Liu (1)
  Qian-ting Hu (1)
  Jin-an Wang (2)
  Jian-gong Li (1)
  
  1. Chongqing Research Institute, China Coal Research Institute, Chongqing, 400037, China
  2. University of Science and Technology Beijing, Beijing, 100083, China
  
• ISSN：1866-6566

文摘

Based on the open stope method, the stability of the gob area was decided by pillars and stiff roof. Therefore, it was dispensable to leave pillars with long-term strength and enough size to support the stiff roof during mining activities. Based on the mining conditions of Baixiang wollastonite mine in Changxing County of Zhejiang, while considering pillars with different shape, irregular size, and distribution, the load imposed on the pillars was analyzed, and the safety coefficient was calculated in order to determine their support status. The strength of stiff roof was calculated by means of analytical solution—theory of rectangle thin plate rested on elastic foundation. The system stability of pillar and stiff roof was analyzed according to the proportion of the total cross section area of pillars to the stiff roof area above the mined area.