置孔释压支护模型在高应力软岩巷道中应用研究

采矿与安全工程学报 ›› 2014, Vol. 31 ›› Issue (6): 926-931.

置孔释压支护模型在高应力软岩巷道中应用研究

1．太原理工大学矿业工程学院，山西太原 030024；2．山西潞安环保能源开发股份有限公司，山西长治 046204

出版日期:2014-11-15 发布日期:2014-12-01
作者简介:李彦斌(1964—)，男，山西省河津市人，副教授，博士，从事采矿工程及软岩巷道支护方面的研究。 E-mail：lyb7676@163.com Tel：13603560463
基金资助:
国家自然科学基金项目(51004075，50974093)

Applied research on a hole-shaped support model for pressure relief in heavily stressed soft rock roadway

Online:2014-11-15 Published:2014-12-01

摘要/Abstract

摘要： 通过对高应力软岩巷道破坏机理进行分析，建立了置孔释压支护模型(围岩-置孔释压材料-金属支架)，分析了置孔释压支护原理，提出了高应力软岩巷道置孔释压支护技术；并利用RFPA软件，对矩形巷道支护前后巷道围岩破坏演化过程进行了模拟。结果表明：无支护时巷道是以两帮压裂为主的整体破坏；采用钢棚支护后，帮与底的破坏诱发顶板大范围离层、冒落，钢棚被压垮；采用置孔释压支护后，围岩应力通过释压材料压缩得以释放，巷道表面无明显变形，支架完整。研究表明置孔释压支护能够降低围岩应力，提高巷道稳定性，为高应力软岩巷道安全支护提供了一种新技术。

关键词: 采矿工程, 高应力软岩, 巷道, 置孔释压支护

Abstract: Through the analysis of failure mechanism of high stress soft rock tunnel excavation, the hole-shaped support model for pressure relief (surrounding rock-material of pressure relief- steel bracket) has been built, the supporting principle of pore pressure relief has been analyzed, and the support pattern for pressure relief in heavily stressed and soft rock roadway has been put forward . By making use of the software of RFPA, the evolutionary process of surrounding rock failure before and after the supporting in the rectangle roadway has been imitated. The result indicates that, when there is no support in the roadway, there is overall damage with fractures in both sides mainly ; when using steel shed support, the damage in the sides and bottoms will induce a wide range of roof abscission layer, rock falling and collapse of the steel shed; when adopting the hole-shaped support for pressure relief, surrounding rock stress can release through the compression of the pressure relief materials . So there is no obvious deformation in roadway surface, and the support is lossless, which indicates that this kind of support can reduce the surrounding rock stress, and enhance safety of roadway. It provides a new method of supporting for the heavily stressed soft rock roadway.

Key words: mining engineering, heavily stressed soft rock, roadway, the hole-shaped support for pressure relief

李彦斌, 李立功, 李剑坤, 马东. 置孔释压支护模型在高应力软岩巷道中应用研究[J]. 采矿与安全工程学报, 2014, 31(6): 926-931.

LI Yanbin, LI Ligong, LI Jiankun, MA Dong. Applied research on a hole-shaped support model for pressure relief in heavily stressed soft rock roadway[J]. Journal of Mining & Safety Engineering, 2014, 31(6): 926-931.

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