叠加开采裂隙场演化与优势瓦斯通道形成机制
发布时间：2019-06-09 20:46
【摘要】：为获得近距离煤层群开采时上覆岩层瓦斯(甲烷)通道的形成与演化规律,采用相似模拟方法研究裂隙场的演化规律与瓦斯通道的形成机制。结果表明:采动裂隙场随工作面的推进,非匀速扩展,来压期间的扩展比正常推进期间快;采动裂隙场与工作面的推进具有同步协调的关系,且裂隙场可划分为裂隙发育区、裂隙贯通区、压实区;近距离煤层群的叠加开采加剧了采动裂隙场的演化,形成了纵横交错的瓦斯流动通道,且瓦斯的流动能力在优势瓦斯通道区、优势瓦斯通道过渡区、一般瓦斯通道区中依次减弱。
[Abstract]:In order to obtain the formation and evolution law of gas (methane) channel in overlying strata during mining of close coal seam group, the evolution law of fracture field and the formation mechanism of gas channel are studied by using similar simulation method. The results show that the mining fracture field expands at an uneven speed with the advance of the working face, and the expansion during the pressure period is faster than that during the normal advance period. There is a synchronous and coordinated relationship between the mining fracture field and the advance of the working face, and the fracture field can be divided into fracture development area, fracture penetration area and compaction area. The superimposed mining of close coal seam group aggravates the evolution of mining fracture field, and forms a crisscross gas flow channel, and the gas flow ability is in the dominant gas channel area and the dominant gas channel transition area. In general, the gas channel area is weakened in turn.
【作者单位】： 安徽理工大学能源与安全学院;
【基金】：国家自然科学基金资助(51504005) 安徽省高校自然科学研究项目重点项目(KJ2017A093) 2016年安徽理工大学大学生创新创业训练计划项目(201610361141)
【分类号】：TD712
[Abstract]:In order to obtain the formation and evolution law of gas (methane) channel in overlying strata during mining of close coal seam group, the evolution law of fracture field and the formation mechanism of gas channel are studied by using similar simulation method. The results show that the mining fracture field expands at an uneven speed with the advance of the working face, and the expansion during the pressure period is faster than that during the normal advance period. There is a synchronous and coordinated relationship between the mining fracture field and the advance of the working face, and the fracture field can be divided into fracture development area, fracture penetration area and compaction area. The superimposed mining of close coal seam group aggravates the evolution of mining fracture field, and forms a crisscross gas flow channel, and the gas flow ability is in the dominant gas channel area and the dominant gas channel transition area. In general, the gas channel area is weakened in turn.
【作者单位】： 安徽理工大学能源与安全学院;
【基金】：国家自然科学基金资助(51504005) 安徽省高校自然科学研究项目重点项目(KJ2017A093) 2016年安徽理工大学大学生创新创业训练计划项目(201610361141)
【分类号】：TD712
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