大断面采动影响煤巷锚索槽钢梁桁架非对称围岩加固技术

发布时间：2018-04-30 15:32

本文选题：大断面 + 煤巷　；参考：《西安科技大学学报》2017年06期

【摘要】：为有效控制大断面采动影响煤巷围岩变形和实现支护结构体在围岩控制过程中的持续稳定,提出了锚索槽钢梁桁架非对称支护技术。首先,基于王家岭煤矿20103工作面运输巷地质条件,建立了锚索槽钢梁桁架非对称支护结构力学模型,掌握了非对称支护顶板弯矩分布规律,得到了顶板弯矩减小最大区域距窄煤柱帮2.4 m处。其次,采用数值模拟分析方法对锚索槽钢梁桁架非对称支护参数进行了优化,确定了桁架偏心距为500 mm,锚索长度为8 m,桁架跨距为1.5m等关键参数。最后,在20103工作面运输巷开展了工业性试验分析,工程应用效果表明,在锚索槽钢梁桁架非对称加固下,巷道围岩变形对采动影响的敏感性减弱,巷道围岩变形量较小,保障了20103工作面高强度安全高效回采。
[Abstract]:In order to effectively control the influence of large section mining on the deformation of surrounding rock in coal roadway and to realize the continuous stability of supporting structure in the process of surrounding rock control, the asymmetric support technology of anchor cable channel steel girder truss is put forward. Firstly, based on the geological conditions of transportation roadway in 20103 face of Wangjialing Coal Mine, a mechanical model of asymmetric supporting structure of cable channel girder truss is established, and the distribution law of bending moment of asymmetric supporting roof is grasped. The maximum area of roof bending moment reduction is 2.4 m from the narrow coal pillar. Secondly, the asymmetric support parameters of cable channel girder truss are optimized by numerical simulation analysis method. The key parameters such as the eccentricity of truss is 500mm, the length of anchor cable is 8 m, and the span of truss is 1.5 m. Finally, the industrial test analysis is carried out in the transport roadway of 20103 working face. The engineering application results show that the sensitivity of surrounding rock deformation of roadway to mining is weakened and the deformation amount of roadway surrounding rock is small under the asymmetric reinforcement of Anchorage cable channel steel girder truss. The high strength, safety and high efficiency mining of 20103 working face is guaranteed.
【作者单位】：山西中煤华晋能源有限责任公司生产技术处;西安科技大学能源学院;教育部西部矿井开采及灾害防治重点实验室;
【基金】：国家重点基础研究计划(973计划)(2015CB251600)
【分类号】：TD353

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