摘要
为满足煤炭高效回采需要,现阶段巷道断面普遍较大,但掘进遇到破碎时会给巷道围岩控制带来较大制约。1502回风巷在掘进至1205~1303 m范围时受多个断层影响,围岩破碎且稳定性较差,巷道在原有的锚网索+架棚支护方式下难以实现围岩变形有效控制,顶板、巷帮最大变形量分别为181.1 mm、575.8 mm,甚至部分位置有支护体系失效风险。通过对破碎围岩巷道围岩变形特征进行分析,提出了采用以提升围岩支护体系强度以及自身承载能力为核心的支护优化技术方案。经过实践,1502回风巷在破碎带围岩变形得以有效控制,顶板、巷帮变形量控制在30 mm、75 mm。
In order to meet the needs of efficient coal recovery,the roadway cross section is generally larger at this stage,but when digging encounters fracture,it will bring greater constraints to the control of the roadway surrounding rock.1502 backwind road is affected by several faults when digging to the range of 1,205-1,303m,the surrounding rock is fractured and less stable,and the roadway is difficult to achieve effective control of the surrounding rock deformation under the original anchor mesh rope+shelf support method,the maximum deformation of the roof plate and the roadway gang are 181.1 mm and 575.5 mm respectively.The maximum deformation of the roof slab and roadway gang was 181.1 mm and 575.8 mm respectively,and there was even a risk of failure of the support system at some locations.Through the analysis of the deformation characteristics of the surrounding rock in the fractured rock tunnel,a support optimization technology solution was proposed to improve the strength of the surrounding rock support system and its own load-bearing capacity as the core.
作者
刘瑞生
Liu Ruisheng(Shuangliu Coal Mine,Shanxi Province Fenxi Mining(Group)Co.,Ltd.,Liulin Shanxi 033300,China)
出处
《机械管理开发》
2023年第7期165-167,共3页
Mechanical Management and Development
关键词
破碎围岩
巷道掘进
围岩支护
注浆加固
围岩变形
fractured surrounding rock
roadway excavation
surrounding rock support
grouting reinforcement
surrounding rock deformation
