大倾角“三软”煤层巷道关键部位强化支护技术研究

发布时间：2018-03-06 04:01

本文选题：大倾角　切入点：“三软”煤层　出处：《采矿与安全工程学报》2017年02期 　论文类型：期刊论文

【摘要】：大倾角"三软"煤层回采巷道围岩变形严重、支护难度普遍较大,为提高此类巷道的围岩控制效果,通过建立巷道围岩力学模型,对巷道顶板、两帮、底板岩层受力情况进行了系统分析,确定了围岩变形的关键部位及主要影响因素,结合复合顶板巷道不同层位组合抗弯强度变化特征,分析了巷道关键部位强化支护机理,提出了"强帮固顶、强顶护帮"的联合支护技术思路与方案。工程实践表明,大倾角"三软"煤层回采巷道在层位选择合理的情况下,通过采用关键部位强化支护技术,能有效提高巷道整体承载能力,巷道围岩变形量减少80%以上,效果显著。
[Abstract]:The surrounding rock deformation of mining roadway in "three soft" coal seam with large inclination is serious, and the support difficulty is generally greater. In order to improve the control effect of surrounding rock of this kind of roadway, the mechanical model of surrounding rock of roadway is established. Based on the systematic analysis of the stress situation of the floor rock, the key position of surrounding rock deformation and the main influencing factors are determined. Combined with the changing characteristics of the bending strength of different strata of composite roof roadway, the mechanism of strengthening the support at the key part of the roadway is analyzed. This paper puts forward the technical thinking and scheme of combined support of "strong roof fixing, strong roof protecting and abutment". The engineering practice shows that under the condition of reasonable selection of strata in large inclined "three soft" coal seam, the supporting technology is strengthened by adopting the key position. It can effectively improve the overall bearing capacity of roadway and reduce the deformation of surrounding rock of roadway by more than 80%, and the effect is remarkable.
【作者单位】：中国矿业大学矿业工程学院江苏省矿山地震监测工程实验室;
【基金】：国家重点基础研究发展计划(973)项目(2015CB251600) 国家自然科学基金项目(51474206,51404254) 江苏省基础研究计划项目(自然科学基金)(BK20150051) 江苏高校优势学科建设工程项目
【分类号】：TD353

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