煤层群下厚保护层开采覆岩移动规律
Overburden Rock Movement Laws of Lower Thick Protecting Stratum Mining Among Coal Seam Groups
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摘要: 为了研究4-1#厚煤层作为保护层预先开采后,其覆岩的移动变形规律及对上部3-1下煤层的稳定性影响,运用UDEC离散元数值软件模拟了随着工作面推进对顶板及上覆3-1下煤层的影响程度,并根据现场工程实践,得出下部厚煤层开采对瓦斯释放及顶板泄压效果显著。Abstract: In order to study the effect of overburden rock movement laws on the stability of 3-1 lower coal seam after that 4-1 thick coal seam is mined in advance as protecting stratum, UDEC discrete element numerical software is used to simulate the impact degree of the face advance on the roof and 3-1 lower coal seam. According to the engineering practice, it shows that the mining in lower thick seam has a great influence on gas release and roof pressure relief.
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