深部矿井地温梯度规律分析
Analysis of Deep Mine Geothermal Gradient
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摘要: 为掌握深部矿井地温分布规律,对某深部矿井-505~-1 030 m水平的原岩温度测定;利用稳态双平板法对围岩的热物性参数测定,确定测点处围岩散热圈的厚度;现场实测结果表明浅部地温梯度为1.557 5 ℃/hm,深部3202工作面2.114 3 ℃/hm,地温梯度随采深增加成规律性变化;SPSS软件相关性分析结果表明地温梯度与原岩温度、标高相关性较好,回归预测分析表明,随着埋深的增加原岩温度在-1 600 m水平时可达39.455 ℃,地温梯度3.453 3 ℃/hm;届时该矿地温热害问题将愈发凸出。Abstract: In order to accurately master ground temperature distribution in deep mine, we measured the original rock temperature of -505 to -1 030 levels in a deep mine, and measured the thermal physical parameters of surrounding rock by steady-state double plate method, determined the thickness of surrounding heat dissipation circle at the point. The measured results show that the shallow geothermal gradient is 1.557 5 ℃/hm, the deep 3202 working face is 2.114 3 ℃/hm, geothermal gradient has a regular change with the increase of mining depth; the SPSS analysis shows that there is a high correlation between geothermal gradient, original rock temperature and elevation. Regression prediction analysis shows that original rock temperature can get 39.455 ℃ and geothermal gradient also reach 3.453 3 ℃/hm at -1 600 mlevels, the heat damage in deep mine will be serious.
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