黑龙江科技大学学报2023，Vol.33Issue(6)：791-795,816,6.DOI:10.3969/j.issn.2095-7262.2023.06.003
红庆梁煤矿软岩分级卸荷的蠕变特征
Creep characteristics of soft rock under graded unloading in Hongqingliang coal mine
摘要
Abstract
This paper aims to explore the deformation characteristics behindthe soft rock under long-term load.The study taking the soft rock of 11307 working facein Hongqingliang coal mine as the research object,conducts a triaxial unloading creep test to study the creep law behind the soft rock of the roadway under the condition of constant bias stress.The results show that the axial deformation of the soft rock in-creases up to 7.34%in the whole creep process of the soft rock in the 11307 roadway in Hongqingliang coal mine,along with the rock damaged;The creep strain and creep rate of the specimens in the 2nd and 5th stress stages are greater than those in the 3rd and 4th stages.When σ1/σ3 is within the range of 2.5455-2.8889,the soft rock specimen is more stable and its creep strain phenomenon is not obvi-ous.This paper can provide an important reference basis for the control of the soft rock roadway envelope under similar geological conditions.关键词
软岩/三轴卸载蠕变试验/蠕变规律Key words
soft rock/triaxial unloading creep test/creep rule分类
矿业与冶金引用本文复制引用
李景涛,刘永立,马浩天..红庆梁煤矿软岩分级卸荷的蠕变特征[J].黑龙江科技大学学报,2023,33(6):791-795,816,6.基金项目
黑龙江省"揭榜挂帅"科技攻关项目(2021ZXJ02A03 （）
2021ZXJ02A04) （）
