摘要
为研究黑龙矿积水空区下淋水顶板围岩稳定性控制技术,以黑龙矿2104运输巷和2102回风巷为工程背景,采用围岩组分、水质和微观结构及力学特性测试试验,揭示黑龙煤矿2104运输巷失稳机理,针对失稳机理,基于组合梁拱理论和整体锚固理论,提出2102回风巷"以防治水为主,兼顾高强度分段支护"的围岩稳定性控制技术方案,并进行现场验证。研究结果表明:积水空区下淋水顶板围岩失稳是由于偏酸性空区积水与顶板围岩相互作用,围岩组分和微观结构发生改变,围岩强度降低,受采掘扰动,塑性区破坏范围增大;2102回风巷的控制方案合理有效,掘进期间,围岩断面收缩率为1.83%~2.53%,巷道稳定性高。该结论可为类似积水空区条件的巷道围岩稳定性控制提供借鉴。
In order to study the stability control technology of the water-sprinkling roof surrounding rock in Heilong coal mine,taking the 2104 transport roadway and 2102 return airway as the engineering background,the surrounding rock composition,water quality,microstructure and mechanical characteristics were tested to reveal the instability mechanism of the 2104 transport roadway.Aiming at the instability mechanism and based on the theory of composite beam arch and overall anchorage,a technical scheme of surrounding rock stability control for 2102 return airway was proposed,which was"mainly to prevent water control and give consideration to high-strength sectional support",and was verified on site.The results showed that the instability of the roof surrounding rock in the water-filled goaf was caused by the interaction between the water-filled goaf in the acidic zone and the water-sprinkling roof surrounding rock,which changed the composition and microstructure of the surrounding rock,reduced the strength of the surrounding rock,and increased the damage range in the plastic zone due to mining disturbance.The control scheme of 2102 return airway was reasonable and effective.During excavation,surrounding rock section shrinkage rate was 1.83%~2.53%,and roadway stability was high.This conclusion can be used as a reference for the stability control of roadway surrounding rock under similar conditions of water accumulation.
作者
郭亚欣
宋选民
GUO Yaxin;SONG Xuanmin(Institute of Mining Technology,Taiyuan University of Technology,Taiyuan,Shanxi,030024,China;Key Laboratory of In-situ Modified Mining Ministry of Education,Taiyuan,Shanxi,030024,China)
出处
《矿业研究与开发》
CAS
北大核心
2019年第12期73-79,共7页
Mining Research and Development
基金
国家自然科学基金资助项目(51674173)
山西省回国留学人员科研资助项目(2016-040)
山西省自然基金面上基金资助项目(201601D102038)
关键词
积水空区
淋水顶板
防治水
分段支护
围岩稳定性
Water-filled goaf
Water-sprinkling roof
Water prevention
Sectional support
Stability of surrounding rock
