深井软岩巷道围岩变形数值分析及控制研究
|
摘要
针对东二南采区轨道大巷变形大难支护问题,采用数值分析方法,分析得出了巷道应力变形规律。结果显示:巷道变形剧烈的临界深度为800 m,深部巷道剪应力在左、右肩达到8.7 MPa左右,在距巷道中心0～5.5 m内顶部垂直应力急剧增大,且在距巷道中心6～8 m内达到峰值,巷道顶板塑性区最大为2.6 m,左帮和右帮塑性区最大分别为5.2、5.4 m,底板塑性区最大值为6.1 m。此结果可为深井软岩巷道支护设计参数提供依据,工程实践证明,支护设计有效控制了巷道的强烈变形,取得较好的支护效果。
Aiming at the problem of large-scale deformation of the track and alleys in the east second mining area,the numerical analysis method is used to analyze the stress and deformation law of the roadway. The results show that the critical depth of the roadway deformation is 800 m,the shear stress of the deep roadway is about 8.7 MPa in the left and right shoulders, and the vertical stress increases sharply in the range of 0 to 5.5 m from the center of the roadway, and is 6 to 8 m from the center of the roadway. The peak value is reached within 8 m,the plastic zone of the roadway roof is 2.6 m,the left and right plastic zones are 5.2 m and 5.4 m,respectively,and the plastic zone of the floor is 6.1 m.This result can provide a basis for the design parameters of deep soft rock roadway support. The engineering practice proves that the support design effectively controls the strong deformation of the roadway and achieves better support effect.
Aiming at the problem of large-scale deformation of the track and alleys in the east second mining area,the numerical analysis method is used to analyze the stress and deformation law of the roadway. The results show that the critical depth of the roadway deformation is 800 m,the shear stress of the deep roadway is about 8.7 MPa in the left and right shoulders, and the vertical stress increases sharply in the range of 0 to 5.5 m from the center of the roadway, and is 6 to 8 m from the center of the roadway. The peak value is reached within 8 m,the plastic zone of the roadway roof is 2.6 m,the left and right plastic zones are 5.2 m and 5.4 m,respectively,and the plastic zone of the floor is 6.1 m.This result can provide a basis for the design parameters of deep soft rock roadway support. The engineering practice proves that the support design effectively controls the strong deformation of the roadway and achieves better support effect.
引文
[1]张国华,李凤仪.晓南矿散体软弱围岩控制技术研究[J].煤炭科学技术,2004(10):1-3,62.
[2]张浩.高地压软岩巷道“锚锚”联合支护技术及矿压观测分析[J].矿业安全与环保,2010,37(4):65-67,70.
[3]柏建彪,王襄禹,贾明魁,等.深部软岩巷道支护原理及应用[J].岩土工程学报,2008(5):632-635.
[4]张振全.深部高应力软岩巷道围岩应力分析及支护研究[J].煤炭技术,2018,37(6):49-51.
[5]孙晓成,袁奇,申玉三,等.深井软岩巷道新型复合支护技术研究[J].煤炭技术,2017,36(11):31-33.
[6]叶金胜,经来旺,王青成,等.破碎围岩巷道联合支护技术与监测分析[J].煤炭技术,2017,36(6):108-110.
[7]伍永平,黄超慧,来兴平,等.深部软岩特性对底臌的影响与数值模拟研究[J].煤炭工程,2006(10):65-67.
[8]王海涛.大断面回采巷道支护的数值模拟[J].煤炭技术,2018,37(2):47-49.
[2]张浩.高地压软岩巷道“锚锚”联合支护技术及矿压观测分析[J].矿业安全与环保,2010,37(4):65-67,70.
[3]柏建彪,王襄禹,贾明魁,等.深部软岩巷道支护原理及应用[J].岩土工程学报,2008(5):632-635.
[4]张振全.深部高应力软岩巷道围岩应力分析及支护研究[J].煤炭技术,2018,37(6):49-51.
[5]孙晓成,袁奇,申玉三,等.深井软岩巷道新型复合支护技术研究[J].煤炭技术,2017,36(11):31-33.
[6]叶金胜,经来旺,王青成,等.破碎围岩巷道联合支护技术与监测分析[J].煤炭技术,2017,36(6):108-110.
[7]伍永平,黄超慧,来兴平,等.深部软岩特性对底臌的影响与数值模拟研究[J].煤炭工程,2006(10):65-67.
[8]王海涛.大断面回采巷道支护的数值模拟[J].煤炭技术,2018,37(2):47-49.