深部破碎膨胀围岩巷道支护参数优化及工程应用

IF 1.3 Q3 Earth and Planetary Sciences
Mining Science Pub Date : 2017-01-01 DOI:10.5277/MSC172415
Wei-jian Yu, Genshui Wu
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引用次数: 1

摘要

针对深部高应力破碎膨胀围岩的变形特点及支护问题,对江西丰龙煤矿深部巷道工程进行了二次支护,并对支护参数进行了优化。首先,根据丰龙煤矿深部巷道变形特点,在原有支护的基础上提出了具体支护方案,然后对二次支护参数和支护时间进行了设计。采用分段线性应变软化模型和岩体剪胀角,得到巷道围岩软化强度参数。考虑锚索的强度效应,提出了锚索的计算公式和支护强度指标ID概念,并给出了锚索效应的修正计算参数。然后对16种方案进行了数值计算,同时采用巷道工程稳定性综合评价指标Es的最优方案。分别分析了不同锚固效果对巷道稳定性的影响和不同二次位移值对巷道稳定性的影响。最后,将优化后的支护方案应用于工程实践,十字法监测巷道变形结果表明,巷道变形值在可控范围内,能较好地控制巷道变形。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Support parameters optimization and engineering application of roadway with broken-expand surrounding rock in deep
Aiming at the deformation characteristics and the support problem of deep high stress broken-expand surrounding rock, the secondary support of the deep roadway engineering of Fenglong coal mine in Jiangxi Province, China, is carried out to optimize the parameters. First of all, according to the characteristics of deep roadway deformation in Fenglong coal mine, the specific support scheme was put forward on the basis of the original support, then, the secondary support parameters and the support time are designed. The softening strength parameters of the surrounding rock in the roadway are obtained by using the piecewise linear strain softening model and the dilatancy angle of the rock mass. Considering the strength effect of cable anchor, the calculation equation and support strength index ID concept of anchor cable are put forward, and the corrected calculation parameters of anchorage effect are given. Then, the numerical calculation is carried out for 16 schemes, meanwhile, the optimal scheme of the comprehensive evaluation index Es of roadway engineering stability is adopted. The influence of different anchoring effect on the stability of roadway and different secondary displacement value on the stability of roadway are analyzed respectively. Finally, the optimized support scheme is used to carry out the engineering practice, the results of monitoring the deformation of roadway by cross method show that the deformation value is within the controllable range, which can better control the roadway deformation.
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来源期刊
Mining Science
Mining Science MINING & MINERAL PROCESSING-
CiteScore
2.40
自引率
0.00%
发文量
0
审稿时长
24 weeks
期刊介绍: Mining Scince. Scientific Papers of the Department Geoengineering, Mining and Geology of the Wroclaw University of Technology. The journal publishes original papers on mining and geology, geo-engineering and the related issues. The journal is devoted to the following topics: fundamental research in mining, underground and open-cast mining technologies, blasting technology, design and construction of mines, geomechanics and geotechnical engineering, mine ventilation, fluid mechanics and its application in mining, mining machinery and condition monitoring, mineral processing, environmental protection and waste utilization. The journal also accepts papers concerns geoengineering which is a sciences covering mining construction, geotechnical engineering, GIS, and earth sciences.
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