浅埋厚基岩松软顶板综放采场矿压特征工作面长度效应

杨永康; 李建胜; 康天合; 季春旭

浅埋厚基岩松软顶板综放采场矿压特征工作面长度效应 English Version

1.太原理工大学采矿工艺研究所，山西太原 030024; 2. 中国建筑材料工业地质勘查中心山西总队，山西太原 030031

基金项目: 国家自然科学基金项目(50974093, 51174141, 50804006)；

详细信息

作者简介:
杨永康 (1981 – ),男，山西运城人，博士研究生，从事采矿工程研究。

中图分类号: TD43
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- 发布日期: 2012-04-19

Effect of working face length on underground pressure characteristics by fully-mechanized top-coal caving mining under shallow-buried thick bedrock loose roof

1. Institute of Mining Technology, Taiyuan University of Technology, Taiyuan 030024, China; 2. Shanxi Unit, China Building Material Geology Investigation Center, Taiyuan 030031, China

摘要

摘要: 基于现场实测结果，结合数值模拟技术，对浅埋厚基岩松软顶板综放采场矿压特征的工作面长度效应进行系统的研究。研究结果表明：加长工作面长度对矿压特征有显著影响；超长综放工作面来压步距减小、采场支架受力均匀、矿压分布呈以工作面中部为对称轴的拱形分布、支架末阻力–初撑力为线性关系；工作面长度方向存在随工作面长度演化的“复合压力拱”；随工作面长度增加，煤壁前方支承压力峰值增大，工作面长度方向压力拱逐渐升高且扁平率趋于增大，表现为总体的矿压显现增加规律，利于顶煤的破碎；控顶区内顶煤下沉量 S 随工作面长度 L 的增大呈对数规律增大，随支架初撑力 P 的增大呈负对数规律减小；给定 S 后， P 随 L 呈线性规律增加。研究成果可为工作面长度和支架的选择提供有益的借鉴和参考。
- 采矿工程 /
- 浅埋深松软顶板 /
- 综放开采 /
- 工作面长度 /
- 矿压特征
Abstract: Based on the results of in-situ measurement and numerical simulation, the effect of working face length on underground pressure characteristics by fully-mechanized top-coal caving mining under the shallow-buried thick bedrock loose roof is studied. Some conclusions can be drawn as follows: (1) The increase of working face length has markable influence on the underground pressure characteristics; (2) the weighting span becomes shorter, the pressure on the support in the face is uniform, the pressure distribution is in the shape of an arch which regards the middle point of the working face as the symmetrical axis, and the regression relation between the maximum resistances and the initial ones is linear in the super-length fully-mechanized top-coal face; (3) there is a complex pressure arch varying with the length of the face; (4) with the increase of mining face length, the peak abutment pressure ahead of the working face increases, the height and rate of the flat along the face all increase, and the underground pressure behaviors are enhanced, which might be propitious for the top coal fracture; (5) the subsidence quantity of the top coal in the control area increases along with the face length in logarithmic way, but decreases along with the initial supporting force in negative logarithmic rule; (6) after assigning the subsidence, the regression relation between the initial supporting force and the face length is linear. The study results can be useful for choosing the reasonable face length and the support.
- mining engineering /
- shallow-buried loose roof /
- fully-mechanized top-coal caving /
- length of working face /
- underground pressure characteristic

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参考文献(20)

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浅埋厚基岩松软顶板综放采场矿压特征工作面长度效应 English Version

作者简介: 杨永康 (1981 – ),男，山西运城人，博士研究生，从事采矿工程研究。

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出版历程

Effect of working face length on underground pressure characteristics by fully-mechanized top-coal caving mining under shallow-buried thick bedrock loose roof

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出版历程

目录

作者简介:
杨永康 (1981 – ),男，山西运城人，博士研究生，从事采矿工程研究。