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| 基于UDEC的大采高覆岩破裂的模拟与分析 |
| Simulation and analysis of overlying strata fracture in large mining height top-coal caving face of coal seams based on UDEC |
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| DOI： |
| 中文关键词: 数值模拟 冒落带 裂隙带 高位钻场 |
| 英文关键词: numerical simulation caving zone fissure zone high location drilling field |
| 基金项目:河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地开放基金项目(WS2012B06);河南省教育厅自然科学基金项目(12A440004) |
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| 中文摘要: |
| 为了准确划分李雅庄煤矿冒落带和裂隙带的高度,采用UDEC4.0数值模拟软件对2-226工作面上覆煤岩层进行模拟,研究得到其两带高度为11~13 m和40~44 m,在采空区两侧20~30 m范围内存在较为明显的竖向破断裂隙;现场通过比较高位钻场抽采瓦斯纯量得到：高位钻场钻孔终孔层位距煤层垂高为11~23 m时抽采瓦斯效果最好,并将钻场终孔位置优化为14.7 m,现场考察结果与数值模拟结论较为吻合;研究成果为其他类似条件矿井采场及采空区瓦斯治理提供一定的依据. |
| 英文摘要: |
| In order to accurately differentiate the height of caving zone and fissure zone liyazhuang coal mine, by using UDEC4.0 numerical simulation software for 2-226 working face coal rocks, the two zone height is 11~13 m and 40~44 m, evident vertical fracture cracks appeared in the goaf on both sides of the 20~30 m range; site by comparing the scalar extraction gas of high drilling field to get that:the effect is best of extraction gas of high field drilling hole horizon eventually distance coal seam hanging high of 11~23 m,And a hole location is drilled that optimization result is 14.7 m, the result tallies inspact with the numerical simulation results;The research results provide certain basis for other similar conditions of mine stope and goaf gas control. |
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