矸石充填开采顶板裂隙分布及演化特征分析

doi:10.13722/j.cnki.jrme.2021.0803

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摘要为了分析矸石充填条件下采空区顶板的破裂特征和运动过程，针对唐山矿矸石充填工作面条件，采用倾斜钻孔探测方法，对采空区顶板进行长期多次定点探测，通过裂隙密度定量描述顶板采动裂隙的分布规律，并采用相似模型试验的方法进行辅助分析，揭示矸石充填开采顶板裂隙发育过程。研究表明：矸石充填开采条件下，顶板中的离层和错动等结构裂隙通常出现在岩层分界处，裂隙形式与所处层位相关；随工作面开采，煤层顶板活动具有裂隙孕育、裂隙超前发育、裂隙密集发育、裂隙稳态扩展、顶板稳定5个阶段特征；离层是顶板下沉的主要组成部分，占总下沉量的一半以上。研究结果可为充填开采支护设计、工作面支架选型等提供理论依据。

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	张鹏飞1
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	赵同彬1
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	马兴印1
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	傅知勇1
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	田秀国3
	李占海1
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关键词 ：采矿工程, 充填开采, 顶板裂隙, 演化过程, 钻孔窥视, 实测分析

Abstract：In order to analyze the fracture characteristics and the movement process of goaf roofs under the condition of gangue backfilled mining，this study based on the engineering conditions of Tangshan Mine F5001 gangue backfilled working face，the inclined borehole detect method is adopted to carry out long-term and fixed point detection on the roof. The distribution characteristics of mining-induced cracks in the roof are described quantitatively by the crack density，and the development process of roof cracks during gangue backfilled mining is revealed by using the method of similar model test. The results show that under the condition of gangue backfilled mining，the structural cracks in the roof usually appear at the boundary of rock strata. The forms of cracks are related to the rock strata where they are located. The roof movement of the coal seam presents five stages including fracture incubation，crack extend in advance，dense fracture development，steady fracture expansion and roof stability. Separation is the main component of the roof subsidence，accounting for more than half of the subsidence value. The conclusions of this paper can provide theoretical basis for support design of backfilled mining and upgrading of hydraulic support in working face.

Key words： mining engineering backfilled mining roof crack evolutionary process borehole detection field measurement analysis

引用本文:

张鹏飞1，2，赵同彬1，2，马兴印1，2，傅知勇1，2，田秀国3，李占海1，2. 矸石充填开采顶板裂隙分布及演化特征分析[J]. 岩石力学与工程学报, 2022, 41(5): 969-978.
ZHANG Pengfei1，2，ZHAO Tongbin1，2，MA Xingyin1，2，FU Zhiyong1，2，TIAN Xiuguo3，LI Zhanhai1，2. Analysis on crack distribution and evolution characteristics of gangue backfilled working face roof. , 2022, 41(5): 969-978.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2021.0803 或 http://rockmech.whrsm.ac.cn/CN/Y2022/V41/I5/969

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