村庄下大倾角煤层条带煤柱合理尺寸研究-采矿工程专业论文.docx

RESEARCH ON REASONABLE SIZE OF STEEPLY DIPPING SEAM STRIP COAL PILLAR UNDER VILLAGE A Dissertation submitted in fulfillment of the Requirements of the degree of MASTER OF PHILOSOPHY from Shandong University of Science and Technology by Chang Xikun Supervisor:Associate Professor Wen Xinglin College of Natural Resources and Environmental Engineering May 2007 声 明 本人呈交给山东科技大学的这篇硕士学位论文，除了所列参考文献和世所 公认的文献外，全部是本人在导师指导下的研究成果。该论文资料尚没有呈交 于其它任何学术机关作鉴定。 硕士生签名： 日 期： AFFIRMATION I declare that this dissertation, submitted in fulfillment of the requirements for the award of Master of Engineering in Shandong University of Science and Technology, is wholly my own work unless referenced of acknowledge. The document has not been submitted for qualification at any other academic institute. Signature: Date: 摘 要 大倾角煤层是指煤层倾角在 35°~55°之间的煤层，村庄下大倾角煤层条带开采煤 柱尺寸的合理留设问题是条带开采研究领域中的一个重要组成部分。煤层倾角是决定煤 柱尺寸留设、破坏形式、地表移动与变形程度的重要因素之一。由于大倾角煤层地质条 件及破坏机理与缓倾斜煤层条带开采有显著不同，其煤柱受力也与缓倾斜煤层不同。我 国煤炭资源储量丰富的西部和“优越”煤层储量越来越少的东部矿区，大倾角煤层条带 开采问题日益突出，促使大倾角煤层的开采问题引起了高度重视，这需要就其煤柱合理 尺寸留设问题进行全面研究，因而该项研究具有重要的理论意义和生产实用价值。本文 是在淄博矿业集团葛亭煤矿 230 采区村庄下大倾角煤层条带开采实践基础上，针对 230 采区大倾角煤层开采的采矿地质条件，利用极限理论和 A.H.Wilson 煤柱强度理论综合 分析确定这种特定条件下的条带开采参数，同时对 230 采区村庄下条带开采方案进行了 数值模拟，对倾角、采出率等因素对煤柱尺寸留设的影响进行了研究。结果表明，这种 综合分析确定条带开采参数的方法，具有较高的可靠性，是一种经济可行的方法，具有 较好的应用价值，对于类似地质和开采条件的矿区具有重要参考价值。 关键词：村庄下采煤，大倾角煤层，条带煤柱，煤柱尺寸，煤柱稳定性，数值模拟 ABSTRACT The steeply dipping seam refers to the coal seam that the declining angle is between 35° and 55 ° . It is an important part in strip mining research to decide the reasonable width of steeply dipping seam strip coal pillar under village. The dipping of coal seam is one of the most important factors that can decided the acquirement of the coal pillar width, the destruction form, the surface migration and distortion deg ree. As the steeply dipping seam geological condition and the destruction mechanism and easy dipping coal seam strip mining are obviously different, the stress of pillar is also different from the easy dipping coal