基于Mogi-Coulomb准则的深部巷道围岩松动圈分析  

Analysis of Loose Zone in Surrounding Rock of Deep Roadway Based on Mogi-Coulomb Criterion

作　　者：经来旺[1] 尚佳乐 黄旭 谢金鑫 郑霖 经纬[1] JING Laiwang;SHANG Jiale;HUANG Xu;XIE Jinxin;ZHENG Lin;JING Wei(School of Engineering and Architecture,Anhui University of Science and Technology,Huinan,Anhui 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南市232001

出　　处：《矿业研究与开发》2024年第2期110-115,共6页Mining Research and Development

基　　金：国家自然科学基金项目(51904012);安徽省高等学校自然科学研究重点项目(KJ2019A0099)。

摘　　要：巷道围岩松动圈是煤矿巷道支护设计的重要依据,研究松动圈半径的计算方式以及应力场和岩性参数对松动圈半径的影响对煤矿企业具有重要意义。基于Mogi-Coulomb准则推导了围岩松动圈半径计算公式,并与Mohr-Coulomb准则、Hoek-Brown准则、统一强度理论3种准则进行了对比,分析讨论了4种准则的适用性与优劣性。结果表明,基于Mogi-Coulomb准则计算得到的松动圈半径最小,而基于Hoek-Brown准则计算得到的松动圈半径最大;中间主应力系数与内聚力对松动圈半径有显著影响;内摩擦角与内聚力、内摩擦角与中间主应力系数对松动圈半径的影响有限;在0.5~1的范围内增大中间主应力系数,同时提高内聚力可以有效抑制松动圈的扩展。The analysis of the surrounding rock loose zone is an important reference in the field of coal mine support.Studying the calculation method of the radius of the loose zone as well as the influences of stress field and the lithologic parameters on the radius of the loose zone are conducive to improving the safety factor of coal mine enterprises.Based on Mogi-Coulomb criterion,the calculation formula of the radius of the surrounding rock loose zone was derived.And then Mogi-Coulomb criterion was compared with the Mohr-Coulomb criterion,Hoek-Brown criterion and unified strength theory.The applicability and advantages and disadvantages of the four criteria were analyzed and discussed.The results show that the the radius of the loose zone calculated based on the Mogi-Coulomb criterion is the smallest,while that calculated based on the Hoek-Brown criterion is the largest.The combination of intermediate principal stress coefficient and cohesion has a significant impact on the radius of the loose zone.The influences of the combination of internal friction angle and cohesion,as well as the combination of internal friction angle and intermediate principal stress coefficient on the radius of the loose zone are limited.Increasing the intermediate principal stress coefficient within the range of 0.5-1,while increasing the cohesion can effectively suppress the expansion of the loose zone.

关 键 词：松动圈 Mogi-Coulomb准则 中间主应力系数 内聚力 

分 类 号：TD353[矿业工程—矿井建设]