厚煤层小窑复采区放顶煤开采矿压显现规律研究

doi:10.11799/ce201311027

煤炭工程 ›› 2013, Vol. 45 ›› Issue (11): 79-82.doi: 10.11799/ce201311027

厚煤层小窑复采区放顶煤开采矿压显现规律研究

刘金凯,赵健健,张春雷,张世青,李骐

中国矿业大学（北京）

收稿日期:2013-03-15 修回日期:2013-04-24 出版日期:2013-11-10 发布日期:2013-11-11
通讯作者: 刘金凯 E-mail:158195503@qq.com

Research on the law of strata pressure behavior of caving mining in secondary mining area of small pit in thick coal seam

Received:2013-03-15 Revised:2013-04-24 Online:2013-11-10 Published:2013-11-11

摘要/Abstract

摘要：

摘要：为了研究厚煤层小窑复采区放顶煤开采时矿压显现规律以及原上分层采空区内残留煤体对下分层工作面造成的影响，运用有限差分数值计算软件Flac3D对毛则渠煤炭有限公司小窑复采区的应力及能量分布规律进行了模拟分析，并进行了现场矿压实测。结果表明，残留煤体会对当前回采工作面造成不规则的影响，其影响范围与残留煤体位置有关，影响的主要方式为应力集中，数值模拟的结果与矿压资料所表现出的规律基本类似，其结果验证了工阻值的大小与上分层异常结构的紧密联系。本文为该矿及类似条件小窑复采区矿井工作面安全高效开采提供了依据。

关键词: 键词：小窑复采区, 放顶煤, 矿压显现, 数值模拟, Flac3D

Abstract:

Abstract: In order to study the law of strata pressure behavior of caving mining in secondary mining area of small pit in thick coal seam and the influence of pillar residue in the upper slice on the working face in the lower slice, we used the finite difference numerical calculation software Flac3D to simulate the distribution rule of stress and energy in Maozequ secondary mining area and we also went to the field to measure the strata pressure. The results show that: pillar residue will put irregular effect on the working face in the lower slice and the range of influence is relevant to the location of pillar residue and the main way of its influence is stress concentration. Besides, the results of numerical simulation are similar with the law which is displayed by strata pressure data. This phenomenon shows that the size of the working resistance has close relationships with anomalous structure in the upper slice. The paper provides a basis for the mine and similar mines working faces to mine safely and efficiently.

Key words: Keywords: the secondary mining area of small pit, sublevel caving, strata behavior, numerical simulation, Flac3D

刘金凯，赵健健，张春雷，等. 厚煤层小窑复采区放顶煤开采矿压显现规律研究[J]. 煤炭工程, 2013, 45(11): 79-82.

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厚煤层小窑复采区放顶煤开采矿压显现规律研究

Research on the law of strata pressure behavior of caving mining in secondary mining area of small pit in thick coal seam

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