巷道含水软岩顶板锚索树脂锚固增效方法

doi:10.13722/j.cnki.jrme.2018.1180

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摘要针对含水软岩顶板巷道锚索锚固力低下、锚索高强支护难以发挥等问题，以李家壕煤矿含水软岩顶板巷道为工程背景，通过理论分析、数值模拟、实验室试验和现场试验等综合研究方法，提出锚索锚固增效方法，研发一种安装使用方便、结构简单、不影响锚索正常施工的锚固增效装置，揭示锚索锚固增效机制。研究表明：由于巷道顶板深部含水岩层位置与顶板的距离的变化，合理的锚固层位确定存在难度，当锚索锚固到含水松软岩层中，锚固力明显下降，且有达不到锚固要求的较大隐患；锚固增效结构设有搅拌装置和封堵导升装置，可有效提高树脂锚固剂搅拌均匀程度、增加锚固区域锚固药体密实性，进而增加锚固药体的锚固效力。相比无处理的锚索锚固力，现场试验锚索锚固力可增加30%以上，有效促进了顶板形成稳定的锚固结构，顶板变形明显降低，顶板稳定性得以增强。

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	贾后省1
	2
	王璐瑶1
	刘少伟1
	2
	贺德印1
	江文渊3
	潘坤1
	王银伟1

关键词 ：岩石力学, 含水软岩, 锚索, 锚固力, 树脂锚固剂, 锚固质量提升

Abstract：Aiming at the problem that it is difficult for high strength cable bolts to come into action in roadway roof with water-bearing soft rock and taking Lijiahao coal mine as an example，theoretical analysis，numerical simulation，laboratory experiment and field test were adopted to propose a method for improving the anchorage effect of cable bolts. A new device which is easy to install and simple in structure without affecting the normal installation of cable bolts was developed and the anchorage improving mechanism of the device was revealed. The results indicate that， as the distance between the water-bearing rock stratum and the roof changes，it is difficult to determine the reasonable anchorage position. When cable bolts are anchored in irregular distribution soft rock stratum，the anchoring force significantly declines and may not meet the anchoring requirements. The device including mixing structure and sealing-lifting structure can increase the uniformity and density of the resin grout to improve the anchoring force. The field test demonstrates that the anchoring force can be increased by more than 30% compared with the normal anchored cable bolts. The device can promote the roof to form a stable anchorage structure and hence，reduce the roof deformations obviously and enhance the roof stability.

Key words： rock mechanics water-bearing soft rock cable bolts anchoring force resin grout anchorage quality improvement

引用本文:

贾后省1，2，王璐瑶1，刘少伟1，2，贺德印1，江文渊3，潘坤1，王银伟1. 巷道含水软岩顶板锚索树脂锚固增效方法[J]. 岩石力学与工程学报, 2019, 38(5): 938-947.
JIA Housheng1，2，WANG Luyao1，LIU Shaowei1，2，HE Deyin1，JIANG Wenyuan3，PAN Kun1，WANG Yinwei1. A method for improving the anchorage effect of the resin-anchored cable bolts in roadway roof with water-bearing soft rock. , 2019, 38(5): 938-947.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2018.1180 或 http://www.rockmech.org/CN/Y2019/V38/I5/938

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