岩土力学2024，Vol.45Issue(1)：38-48,11.DOI:10.16285/j.rsm.2022.1834
基于冲能吸能平衡效应的冲击地压巷道分级支护研究
Graded support of rock burst roadway based on balance theory of impact energy and absorbed energy
摘要
Abstract
Rock burst is a dynamic disaster that occurs during coal mining,characterized by the sudden and violent release of elastic deformation energy accumulated in coal and rock.The majority of rock bursts,approximately 90％,happens in roadways.Roadway impact failure is not only influenced by impact energy,but also by the distance from the impact source.To address this,the concept of energy distance ratio is introduced,which represents the ratio of energy released by the impact source to the distance to the roadway.By considering the static load superposition mechanism of rock bursts and the balance theory of impulse energy absorption,various factors are taken into account,including the characteristics of the impact source energy distance ratio,roadway failure degree,energy absorption of supporting components,and energy absorption of weak structures.Based on these considerations,a corresponding relationship between the energy level of rock bursts and roadway support strength is established.The roadway support technology based on"four high anchor mesh+"is determined,which includes the use of high-strength anchor mesh combined with other support elements.The safety and reliability of roadway support technology under rock bursts are classified into P1-P4 levels according to the energy distance ratio of the impact source.Each level corresponds to the"four high anchor mesh+"combined support technology with different support strength.The research findings suggest that"four high"anchor mesh support is suitable for non-impact roadways with energy distance ratios in the magnitude of 102 rock bursts."Four high anchor mesh+1"combined support,which includes O-shaped steel sheds,energy absorption and anti-impact unit frames,and weak surrounding rock structures,can prevent 103 magnitude rock bursts."Four high anchor mesh+2"combined support is effective against 104 magnitude rock bursts,while"four high anchor mesh+3"combined support can prevent 105 magnitude rock bursts.Rock bursts with magnitudes of 106 and above require remote treatment and removal from production.Engineering examples are provided to demonstrate the anti-impact support scheme and parameter design of roadways.These examples help verify the feasibility and practicality of the theoretical research results.The research outcomes have valuable implications for the theoretical research and engineering practice of rock burst roadway support in coal mines in China.关键词
冲击地压/巷道围岩控制/冲能吸能平衡/能距比/分级支护Key words
rock burst/roadway surrounding rock control/impact absorption energy balance/ratio of energy to distance/graded support分类
矿业与冶金引用本文复制引用
高明仕,俞鑫,徐东,贺永亮,赵世帆..基于冲能吸能平衡效应的冲击地压巷道分级支护研究[J].岩土力学,2024,45(1):38-48,11.基金项目
国家自然科学基金(No.51564044) （No.51564044）
华能集团总部科技项目(No.HNKJ20-H87) （No.HNKJ20-H87）
江苏省研究生科研与实践创新计划项目(No.KYCX21_2364).This work was supported by the National Natural Science Foundation of China(51564044),Huaneng Group Headquarters Science and Technology Project(HNKJ20-H87)and the Jiangsu Graduate Research and Practice Innovation Program(KYCX21_2364). （No.KYCX21_2364）
