浅埋深坚硬厚顶板动压巷道采动应力演化规律研究  

Evolution law of mining stress in dynamic pressure roadway with shallow depth and hard thick roof

作　　者：王锐 张镇 华照来 任建超 程利兴 程磊 汪占领 冯裕堂 WANG Rui;ZHANG Zhen;HUA Zhao-lai;REN Jian-chao;CHENG Li-xing;CHENG Lei;WANG Zhan-ling;FENG Yu-tang(Shaanxi Shaanmei Caojiatan Mining Co.,Ltd.,Yulin 719000,China;Coal Mining and Designing Department,Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China)

机构地区：[1]陕西陕煤曹家滩矿业有限公司,陕西榆林719000 [2]天地科股份有限公司开采设计事业部,北京100013

出　　处：《煤炭工程》2022年第11期29-34,共6页Coal Engineering

摘　　要：针对浅埋深坚硬厚顶板条件下巷道矿压显现强烈的问题,采用多种现场实测数据研究了工作面回采前后全周期采动应力的演化规律以及巷道围岩变形破坏演化特征。结果表明,工作面回采前后全周期采动应力演化规律表现出显著的阶段性变化特征,超前阶段采动影响较小,滞后阶段矿压显现强烈,煤柱帮下部锚杆受力最显著,最大增幅达17.3kN。采动应力逐渐向辅运巷方向转移,煤柱峰值应力最终稳定在10.4MPa。滞后工作面距离大于405.6m时随顶板岩层运动趋于稳定,采动应力变化也逐渐稳定。结合辅运巷在采动应力作用下的变形特征,提出了薄弱环节加强支护的控制思路,制定了合理的巷道支护对策,以期为类似条件的动压巷道围岩控制提供一定指导。In view of the strong mine pressure behavior of roadway under the condition of shallow and deep hard thick roof,the evolution law of full cycle mining stress before and after mining and the evolution characteristics of deformation and failure of roadway surrounding rock were studied using a variety of field measured data.The results show that the evolution law of full cycle mining stress before and after mining in the working face shows significant stage change characteristics.The influence of mining in the leading stage is small,and the mine pressure in the lagging stage is strong.The stress on the bolt at the lower part of the coal pillar wall is the most significant,with a maximum increase of 17.3 kN.The vertical stress of the coal pillar changes most strongly in the lag working face stage,and the peak stress is mainly distributed within the range of 8~14 m of the coal pillar.The evolution law of the coal pillar stress is that the goaf side gradually transfers to the auxiliary haulage roadway,and the peak stress of the coal pillar finally stabilizes at 10.4 MPa.When the lag working face distance is greater than 405.6 m,it tends to be stable with the movement of roof rock layer,and the change of mining stress also gradually stabilizes.Combining with the deformation characteristics of auxiliary haulage roadway under mining stress,the control idea of strengthening support in weak links is put forward,and reasonable roadway support countermeasures are formulated.

关 键 词：坚硬厚顶板 动压巷道 采动应力 锚杆支护 

分 类 号：TD353[矿业工程—矿井建设]