深部高应力碎胀围岩二次支护参数研究

采矿与安全工程学报 ›› 2013, Vol. 30 ›› Issue (5): 665-672.

深部高应力碎胀围岩二次支护参数研究

1．丰城曲江煤炭开发有限责任公司，江西丰城 331136； 2．湖南科技大学煤矿安全开采技术湖南省重点实验室，湖南湘潭 411201

出版日期:2013-09-15 发布日期:2013-10-01
作者简介:黄文忠(1967-)，男，江西省南康市人，硕士，高级工程师，从事煤矿开采技术及管理工作。 E-mail：hwzcl2006@163.com Tel：0795-6687088
基金资助:
国家自然科学基金项目(51104063；51074071)

Analysis on secondary support parameter of deep high-stress & broken-expand surrounding rock

Online:2013-09-15 Published:2013-10-01

摘要/Abstract

摘要： 针对深部高应力碎胀围岩的变形特点及难支护问题，以江西曲江矿区为例进行了二次支护参数优化设计的研究。根据曲江矿区深部巷道变形特点，在原支护方案的基础上提出了具体支护方案。采用分段线性的应变软化模型，获得了巷道围岩峰后软化强度参数；考虑锚固体的强度效应，提出了锚索的支护强度指标ID 概念及计算公式，并给出了锚固效应修正的岩体计算参数。针对16 个设计方案进行了数值计算，并采用提出的巷道工程稳定性综合得分指标ES 进行优选方案。计算结果表明，方案11(锚索长度la 为8 000 mm，间排距ea×ia 为1000 mm×1000 mm；初次支护时机位移值da 为60 mm)不但能保证巷道的稳定，而且经济合理，为最佳方案。另外，分别分析了不同锚固效应对巷道稳定性的影响，以及不同二次支护时机位移值对巷道稳定性的影响，并提出了支护参数的总体评价及设计原则。

关键词: 深部高应力, 巷道围岩, 支护强度, 二次支护时机, 数值计算

Abstract: According to deformation features and supporting problem of deep high-stress & broken- expand surrounding rock, with Qujiang Coal Mine as an example, optimization of secondary support parameter was studied. Concrete support projects were put forward based on deformation features of deep roadway and original supporting project, these projects include the first support parameters, the secondary support parameters and the secondary support opportunity. The piecewise linear strain-softening model was used to obtain post-peak soften strength parameters of surrounding rock. Strength effect of anchorage body was considered, the concept and the calculation formula of anchor supporting strength index (ID) was put forward, and modified calculation parameters of rock mass were given. Numerical calculation was done for these sixteen secondary support projects, and comprehensive scores index (ES) of roadway stability proposed was used to optimize projects. The results showed that the eleventh project (the anchor length (la) is 8 000 mm, the low and row distance (ea×ia) is 1000 mm ×1000 mm, the displacement value of secondary support opportunity (da) is 60 mm) can not only ensure stability of roadway, but also save cost, so it is optimum scheme. Therefore, influence relation of different anchoring effects and different displacement values of secondary support opportunity action on roadway stability were respectively analyzed, and overall evaluation and designing principles of support parameters were put forward.

Key words: deep high stress, roadway surrounding rock, support strength, secondary support opportunity, numerical calculation

黄文忠, 王卫军, 余伟健. 深部高应力碎胀围岩二次支护参数研究[J]. 采矿与安全工程学报, 2013, 30(5): 665-672.

HUANG Wen-zhong, WANG Wei-jun, YU Wei-jian. Analysis on secondary support parameter of deep high-stress & broken-expand surrounding rock[J]. Journal of Mining & Safety Engineering, 2013, 30(5): 665-672.

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