|Table of Contents|

Instability Analysis of Coal Pillar and Roof System Under Non-uniformly Distributed Loading(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2008年03期
Page:
37-41
Research Field:
Publishing date:
2008-09-20

Info

Title:
Instability Analysis of Coal Pillar and Roof System Under Non-uniformly Distributed Loading
Author(s):
HE Guang-ling1;  HONG Fang2;  LI Qian-mei3
1. Department of Architectural Engineering, Tongji University, Shanghai 200092, China; 2. Department of Civil Engineering, Fujian University of Technology, Fuzhou 350007, Fujian, China; 3. School of Civil Engineering, Architecture and Mechanics, Central South University of Forestry and Technology, Changsha 410004, Hunan, China
Keywords:
non-uniformly distributed loading;  coal pillar and roof system;  catastrophe theory;  instability mechanism;  critical thickness
PACS:
TU311.2
DOI:
-
Abstract:
Since the loads on the coal pillar and roof system were non-uniformly distributed, the instability mechanism of the system under non-uniformly distributed loading was studied. Based on the Winkler's hypothesis, the stiff roof was assumed as an elastic beam and the coal pillars were equal to continuously and uniformly distributed support springs, which formed the mechanical model of the pillar and roof interaction system. Then the instability mechanisms of the coal pillar and roof system were explored, the instability mechanical criterion was deduced and the critical thickness of roof was obtained based on the catastrophe theory. Furthermore, some suggestions for application were given according to the parametric analysis. At last, taking a coal mine in Gansu Province as an example, the exact critical thickness of roof was calculated. The result is useful for the further research of the stability of the pillar and roof system and designing of relevant codes.

References:

[1] 秦四清,何怀锋.狭窄煤柱冲击地压失稳的突变理论分析[J].水文地质工程地质,1995,22(5):17-20. QIN Si-qing,HE Huai-feng.Catastrophe Analysis of Narrow Coal Pillar Instability in the Impact Area[J].Hydrogeology and Engineering Geology,1995,22(5):17-20.
[2]徐曾和,徐小荷,唐春安.坚硬顶板下煤柱岩爆的尖点突变理论分析[J].煤炭学报,1995,20(5):485-491. XU Zeng-he,XU Xiao-he,TANG Chun-an.Theoretical Analysis of a Cusp Catastrophe Bump of Coal Pillar Under Hard Rocks[J].Journal of China Coal Society,1995,20(5):485-491.
[3]徐曾和,徐小荷.柱式开采岩爆发生条件与时间效应的尖点突变[J].中国有色金属学报,1997,7(2):17-23. XU Zeng-he,XU Xiao-he.Cusp Catastrophe of Occurrence Conditions and Hysteresis of Rockbursts in Pillar Workings[J].The Chinese Journal of Nonferrous Metals,1997,7(2):17-23.
[4]李 宏,徐曾和,徐小荷,等.非对称开采时矿柱岩爆的准则与前兆[J].中国矿业,1997,6(1):46-51. LI Hong,XU Zeng-he,XU Xiao-he,et al.Criterions and Forewarning of Ore Pillar Rock Bursts in Asymmetric Mining[J].China Mining Magazine,1997,6(1):46-51.
[5]贺广零,洪 芳,王艳苹.采空区煤柱-顶板系统失稳的力学分析[J].建筑科学与工程学报,2007,24(1):31-36. HE Guang-ling,HONG Fang,WANG Yan-ping.Mechanical Analysis of Instability of Coal Pillar and Roof System in Goaf[J].Journal of Architecture and Civil Engineering,2007,24(1):31-36.
[6]石 坚,武 莹,贺建辉.上部结构、筏板基础和地基共同作用的有限元分析[J].建筑科学与工程学报,2006,23(2):72-75. SHI Jian,WU Ying,HE Jian-hui.FEA on Interaction of Super Structure, Raft Foundation and Ground Base[J].Journal of Architecture and Civil Engineering,2006,23(2):72-75.
[7]康亚明,杨明成,胡艳香,等.基于重度增加法的边坡稳定性三维有限元分析[J].建筑科学与工程学报,2006,23(4):49-53. KANG Ya-ming,YANG Ming-cheng,HU Yan-xiang,et al.3-D FEM Analysis of Slope Stability Based on Gravity Increase Method[J].Journal of Architecture and Civil Engineering,2006,23(4):49-53.
[8]徐芝纶.弹性力学:下册[M].北京:高等教育出版社,1992. XU Zhi-lun.Elasticity Mechanics:Volume 2[M].Beijing:Higher Education Press,1992.
[9]刘正兴,孙 雁,王国庆.计算固体力学[M].上海:上海交通大学出版社,2000. LIU Zheng-xing,SUN Yan,WANG Guo-qing.Calculating Solid Mechanics[M].Shanghai:Shanghai Jiaotong University Press,2000.
[10]SAUNDERS P T.突变理论入门[M].凌复华,译.上海:上海科学技术文献出版社,1983. SAUNDERS P T.An Introduction to Catastrophe Theory[M].Translated by LING Fu-hua.Shanghai:Shanghai Science & Technology Literature Press,1983.
[11]ARNOLD V I.Catastrophe Theory[M].Berlin:Springer-verlag,1986.

Memo

Memo:
-
Last Update: 2008-09-20