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Effect of Creep on Gas Drillings in Soft Coal Seam
Author(s): 
Pages: 15-18
Year: Issue:  8
Journal: Safety in Coal Mines

Keyword:  钻孔稳定性力学模型理论分析ABAQUS数值模拟松软煤层蠕变钻孔直径;
Abstract: 为解决松软煤层瓦斯抽采钻孔变形较大、稳定性差等问题,基于蠕变煤层与套管相互作用力学模型,采用理论分析和ABAQUS数值模拟相结合的方法,研究了在非均匀地应力下松软煤层蠕变对瓦斯成孔稳定性的影响,对比松软煤层在有无水泥环、套管下的蠕变情况.结果表明:水泥环和套管对煤孔的稳定性会产生积极的影响;当钻孔直径取φ85 mm时,套管及孔壁应力较小.
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