【摘要】：基于鉆孔周圍煤巖力學模型,建立全尺寸鉆孔模型,運用FLAC3D進行數(shù)值模擬,模擬鉆孔周圍煤巖的應力、位移分布,并在試驗地點進行效果檢驗。結(jié)果表明:鉆孔周圍煤巖剪應力呈""形狀分布;鉆孔孔壁頂部和底部位移較大,鉆孔形狀由圓形逐漸變成橢圓形;模型鉆孔走向長度對模擬結(jié)果影響較小;采用區(qū)域措施消突效果考察,消突效果良好,鉆孔孔壁穩(wěn)定性較好。
[Abstract]:Based on the mechanical model of coal and rock around the borehole, the full-size drilling model is established. The stress and displacement distribution of the surrounding coal and rock are simulated by FLAC3D, and the effect is tested at the test site. The results show that the shear stress of coal and rock around the drilling hole is distributed in the shape of "shape, the top and bottom displacement of hole wall is large, the shape of hole is gradually changed from circle to ellipse, and the strike length of the model has little effect on the simulation results. The results show that the effect of eliminating outburst is good, and the stability of hole wall is better.
【作者單位】： 中國礦業(yè)大學(北京)煤炭資源與安全開采國家重點實驗室;中國礦業(yè)大學(北京)資源與安全工程學院;
【分類號】：TD713.3
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本文編號：2449319