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条带开采是“三下”开采中的一种重要采煤方法。合理条带煤柱宽度的留设不仅能提高煤炭采出率,而且能有效地保护地面设施。文中通过对煤体极限强度和煤柱屈服区宽度模型的分析,推导出条带煤柱合理宽度留设的计算公式,确定出了在煤层地质条件参数M,H和煤岩物理力学参数γ,φ,c,μ一定的条件下,条带采宽D是影响条带煤柱合理宽度留设的主要且可控参数,并运用于工程实践,取得了较好的效果。
Strip mining is an important mining method in “three times” mining. Proper striping of pillar widths not only increases coal recovery, but also effectively protects surface facilities. Based on the analysis of ultimate strength of coal body and yield zone width model of coal pillar, the formula for calculating the reasonable width of strip coal pillar is deduced, and the parameters of geological conditions M, H and the physical and mechanical parameters γ, φ, c, μ, the strip width D is the main and controllable parameter that affects the reasonable width of strip coal pillar, and is applied to engineering practice and achieved good results.