西部弱胶结软岩巷道新型聚合物喷层支护研究

发布时间：2018-05-14 04:45

本文选题：弱胶结软岩 + 喷层　；参考：《煤炭科学技术》2017年12期

【摘要】：针对传统的喷射混凝土喷层力学性能不均一,延伸性能差,难以较好封闭支护围岩,影响围岩力学特性和支护结构稳定的问题,结合西部软岩巷道工程地质条件和矿压显现规律,在传统喷射混凝土材料配比的基础上,通过室内材料配比试验确定了新型聚合物喷层的材料配比和力学性能,研发的聚合物喷层强度高,抗裂性能和延伸性能好,能够适应软岩巷道大变形的支护要求。在红庆梁煤矿总辅运大巷岩巷试验段进行工业性试验,并通过6个月现场监测可知,无水段巷道喷层差异不大,而在淋水段巷道新型聚合物喷层完整性好,围岩稳定性好,锚杆锚索受力小,所以新型聚合物喷层能有效封闭西部弱胶结软弱围岩,维持巷道的长期稳定。
[Abstract]:Aiming at the problem that the mechanical properties of the traditional shotcrete layer are not uniform and the extension performance is poor, it is difficult to close the surrounding rock, which affects the mechanical characteristics of surrounding rock and the stability of the supporting structure. Combined with the engineering geological conditions of soft rock roadway in the west of China and the law of rock pressure behavior, the material ratio and mechanical properties of the new polymer spray layer were determined by laboratory test on the basis of the traditional mix ratio of shotcrete material. The developed polymer spray layer has high strength, good crack resistance and extension, and can meet the requirement of large deformation support in soft rock roadway. The industrial test was carried out in the test section of main roadway in Hongqingliang Coal Mine, and through 6 months field monitoring, it was found that there was little difference in jet layer of waterless roadway, but the integrity of new polymer spray layer and the stability of surrounding rock were good in the roadway of dripping section. The anchor cable has a small force, so the new polymer spray layer can effectively seal the weak cemented weak surrounding rock in the west and maintain the long term stability of the roadway.
【作者单位】：华北科技学院;北京中煤矿山工程有限公司;北京昊华能源股份有限公司;
【基金】：国家自然科学基金资助项目(51404105) 河北省自然科学基金资助项目(E2015508047)
【分类号】：TD353

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