基于主应力差影响的底板应力分布状态研究
Study on Stress Distribution State of Floor Based on the Influence of Principal Stress Difference
-
摘要: 为了研究上煤层中留设煤柱对底板岩层的应力传递规律影响,创新性地引入“主应力差值”作为岩层承压状态的动态指标,代替传统的垂直应力、水平应力和剪切应力的方法,摆脱了传统模型无法定量描述煤岩体变形破坏程度的研究现状,以传统模型研究为基础,得出3个应力的底板应力分布状态,而后进一步分析“主应力差”的表征特性和求解公式,最终解算模型得到底板主应力差传递形式呈“扇形扩散状”,底板约20 m内浅部岩层内应力曲线呈“双峰状”,且随着埋深增大,曲线逐渐向“单峰状”转变,在下层位煤层顶板位置主应力差基本呈现单峰,且煤柱底板中线位置破坏程度最大。Abstract: In order to study the influence of coal pillar in the upper coal seam on the stress transfer law of the floor rock, the “principal stress difference” is introduced innovatively as a dynamic index for the strata bearing state. It takes the place of the traditional methods of vertical stress, horizontal stress and shear stress, and gets rid of the research status that traditional models cannot quantitatively describe the degree of deformation and failure of coal and rock mass. In this paper, based on the traditional model research, the stress distribution state of the three stresses is obtained. Then the characteristic and solution formula of “principal stress difference” are further analyzed. Finally, the solution model shows that the transfer form of the principal stress difference on the floor is “fan-shaped diffusion”, and the stress curve in the shallow strata within 20 m of the floor is “double peak”. With the increase of buried depth, the curve gradually changes to a “single peak shape”, and the principal stress difference at the lower seam roof presents single peak, and the damage degree of the center line of the coal pillar floor is the largest.
-
-
[1] 宋明达.我国煤炭行业发展趋势研究[J].煤炭经济研究,2014,34 (9):40-42. [2] 陈宏琳.新形势下煤炭营销问题与对策分析[J].煤炭技术,2014,33(2):250-252. [3] 张熙霖.2015年煤炭行业形势分析及未来发展研判[J].煤炭经济研究,2016,36(1):11-14. [4] 陈锋,张明,逯雨兵,等.孤岛煤柱下巷道布置位置研究[J].煤炭安全,2016,47(4):68-75. [5] 陆士良,孙永联,姜耀东,等.巷道与上部煤柱边缘间水平距离X的选择[J].中国矿业大学学报,1993,22(2):1-7. [6] 陆士良,姜耀东,孙永联.巷道与上部煤层间垂距Z的选择[J].中国矿业大学学报,1993,22(1):1-7. [7] 关英斌,李海梅,路军臣.显德汪煤矿9号煤层底板破坏规律的研究[J].煤炭学报,2003,28(2):121-125. [8] 鞠金峰,许家林,朱卫兵,等.神东矿区近距离煤层出一侧采空煤柱压架机制[J].岩石力学与工程学报,2013,32(7):1321-1330. [9] 焦建康,鞠文君,冯友良,等.基于响应面法的煤柱下巷道稳定性多因素分析[J].采矿与安全工程学报,2017,34(5):933-939. [10] 胡少轩,许兴亮,田素川,等.近距离煤层协同机理对下层煤巷道位置的优化[J].采矿与安全工程学报,2016,33(6):1008-1013. [11] 钱鸣高,刘听成.矿山压力及其控制[M].北京:煤炭工业出版社,1999. [12] 于斌,刘长友,杨敬轩,等.大同矿区双系煤层开采煤柱影响下的强矿压显现机理[J].煤炭学报,2014,39(1):40-46. [13] 李广信,张丙引,于玉贞.土力学[M].北京:清华大学出版社,2013. [14] 许磊,张海亮,耿东坤,等.煤柱底板主应力差演化特征及巷道布置[J].采矿与安全工程学报,2015,32(3):478-484. -
期刊类型引用(4)
1. 刘春康，王洪江，李浩. 非等压应力场下充填钻孔主应力差分布规律. 中国有色金属学报. 2024(05): 1743-1756 . 
百度学术
2. 杜怀龙，刘忠平，田志诚. 近距离煤层上覆遗留煤柱应力扰动特征研究及应用. 矿业安全与环保. 2024(06): 112-121 . 百度学术
3. 何富连，杨阳，李亮，欧阳烽，张潇，付丽红. 近距离下部煤层回采巷道合理位置确定. 矿业科学学报. 2022(04): 505-512 . 百度学术
4. 付巍. 基于数字图像技术的相似材料试样破坏试验研究. 煤矿安全. 2021(08): 39-43+50 . 本站查看
其他类型引用(7)
计量
- 文章访问数: 104
- HTML全文浏览量: 2
- PDF下载量: 1
- 被引次数: 11
下载:
