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| 下保护层开采覆岩应力变化特性数值模拟 |
| Numerical simulation of the stress and rock deformation characteristic caused by mining protecting stratum |
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| DOI： |
| 中文关键词: 保护层开采;数值模拟;瓦斯压力;应力场 |
| 英文关键词: protective seam; numerical simulation; gas pressure; the stress field |
| 基金项目:国家科技重大专项资助项目(2011ZX05064);安徽省教育厅重点资助项目(KJ2011A075) |
| 作者 | 单位 | | 费玉祥1,徐超杰2,贾方旭2 | 1.淮南矿业集团,安徽 淮南 232001
2.安徽理工大学 能源与安全学院,安徽 淮南 232001 |
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| 摘要点击次数: 2135 |
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| 中文摘要: |
| 为了预防生产矿井的煤与瓦斯突出,利用保护层开采过程中的被保护层的卸压作用对卸压瓦斯进行强化抽采,使被保护层由高瓦斯突出危险煤层变为低瓦斯无突出危险煤层,实现对煤与瓦斯突出煤层的消突.应用数值模拟软件进行模拟,对下保护层开采后顶板覆岩的卸压程度、煤岩层移动变形、岩体裂隙发育和煤层卸压瓦斯抽采方法进行系统的研究.结果表明,被保护层的膨胀变形使得被保护范围内的围岩体内部形成大量孔道和裂隙,煤层的透气性增大.被保护层地压减小,弹性潜能得到缓慢释放.开采保护层结合采取相应的瓦斯抽放措施,对于防治深部煤层瓦斯突出和实现煤矿安全生产具有重要的意义. |
| 英文摘要: |
| With the increase of mine mining depth, the dangerous gas mine is outstanding increasingly, and the risk factors affecting coal seam mining is becoming more and more complex. Protective layer mining is widely used in the currently regional technical measures to prevent coal and gas outburst, and many domestic coal mines have adopted mining protective layer to prevent the mine coal and gas outburst, and to realize the coal and gas outburst coal seam outburst elimination. In the protective layer, under the influence of working face mining stope, overburden will have corresponding deformation. The original stress state balance will be destroyed, leading to the permeability of coal and rock. Then, the intensity and gas pressure will be changed. This paper applies the numerical simulation software to simulate, the protective layer of roof strata after mining under unloading, coal strata movement deformation and fracture of rock mass and coal seam gas extraction methods for pressure relief system research. Mining protective layer is combined with the corresponding gas drainage measures for prevention and treatment of deep coal seam gas outburst, and the realization of coal mine safety production is very important. |
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