基于统一强度理论的护巷煤柱尺寸与支护技术研究
Research on Coal Pillar Size and Supporting Technology Under Based on Strength Theory
-
摘要: 护巷煤柱尺寸与支护参数存在着密切联系，基于统一强度理论，建立支护应力与护巷煤柱尺寸计算模型，模型表明支护应力越大，护巷煤柱尺寸越小。通过数值模拟，分析出不同锚带网支护参数下，支护应力在巷帮竖向、横向的分布规律，并优选出最佳锚带网支护参数。据此计算出某矿7212工作面风巷护巷煤柱为7 m。实践表明，巷帮能得到有效控制，巷道整体稳定。Abstract: There is a close relationship between protective coal pillar size and supporting parameters. Based on the unified strength theory, we establish the calculation model between supporting stress and protective coal pillar size. The model shows that the larger supporting stress, the smaller the size of the pillar. Through the numerical simulation, different anchor belt mesh support parameters show supporting stress in the lane for vertical, horizontal and overall surface distribution. Based on supporting result and the difficulty of construction, we choose the optimal anchor belt net support parameters. According to calculation, the mine 7212 working face roadway supporting pillar is 7 m. Engineering practice shows that the roadway can be effectively controlled.
-
-
[1] 钱鸣高,许家林,缪协兴,等.煤矿绿色开采技术[J].中国矿业大学学报,2003,32(4):343-348. [2] 邹友峰,柴华彬.我国条带煤柱稳定性研究现状及存在问题[J].采矿与安全工程学报,2006,23(2):141. [3] Sheorey P R,Das M N,Bordia S K,et al.Pillar strength approaches based on a new failure criterion for coal seams[J].International Journal of Mining and Geological Engineering,1986,4(4):273-290. [4] Mortazavi A,Hassain F P, Shabani M.A. Numerical investigation of rock pillar failure mechanism in underground openings[J].Computers and Geotechnics,2009,36(5):691-697. [5] 俞茂宏.双剪理论及其应用[M].北京:科学出版社,1998. [6] 俞茂宏.线性和非线性的统一强度理论[J].岩石力学与工程学报,2007,26(4):662-666. [7] 郑西贵,姚志刚，张农.掘采全过程沿空掘巷小煤柱应力分布研究[J].采矿与安全工程学报,2012,29(4):459-465. [8] 刘贵,张兴华,徐乃忠.深部厚煤层条带开采煤柱的稳定性[J].煤炭学报,2008,33(10):1086-1091. [9] 侯朝炯,马念杰.煤层巷道两帮煤体应力和极限平衡区的探讨[J].煤炭学报,1989,14(4)：21-29. [10] 康红普,吴拥政,李建波.锚杆支护组合构件的力学性能与支护效果分析[J].煤炭学报2010,35(7):1057-1066. [11] 康红普,姜铁明,高富强.预应力锚杆支护参数的设计[J].煤炭学报,2008,33(7):721-726.
计量
- 文章访问数: 295
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
