房式开采条件下光卤石矿床合理采高的确定
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摘要
为确定老挝某钾盐矿房式开采条件下近水平光卤石矿床的合理采高,采用理论分析结合数值模拟的研究方法,并针对该矿特有地质条件,分析了光卤石矿层不同条件下的矿压显现特征。研究表明:随埋深增加,矿柱塑性区的大小由0m增大到5.663m,顶底板移近量由1.82cm增加到30.1cm;随采高增加,矿柱塑性区的大小由1.7m增大到7.234m,顶底板移近量由11.6cm增加到27.8cm,理论分析与数值模拟结果吻合程度较高,最终确定该矿房式开采条件下,采高控制在4~6m为宜。
In order to determine the reasonable mining height of a near horizontal carnallite deposit under conditions of room mining in Laos,this paper studies the strata behavior characteristics of carnallite ore beds under the specific geological conditions in the deposit by combining theoretical analysis with numerical simulation.The research shows that with the increase of buried depth,the pillar plastic zone enlarges from 0 mto 5.663 mand the convergence between roof and floor increases from 1.82 cm to 30.1 cm.With the increase of mining height,the pillar plastic zone enlarges from 1.7 mto 7.234 mand the convergence between roof and floor increases from 11.6 cm to 27.8 cm.The results of theoretical analysis and numerical simulation are highly consistent.Given the room mining method adopted in the deposit,the appropriate mining height is finalized to be 4 mto 6 m.
In order to determine the reasonable mining height of a near horizontal carnallite deposit under conditions of room mining in Laos,this paper studies the strata behavior characteristics of carnallite ore beds under the specific geological conditions in the deposit by combining theoretical analysis with numerical simulation.The research shows that with the increase of buried depth,the pillar plastic zone enlarges from 0 mto 5.663 mand the convergence between roof and floor increases from 1.82 cm to 30.1 cm.With the increase of mining height,the pillar plastic zone enlarges from 1.7 mto 7.234 mand the convergence between roof and floor increases from 11.6 cm to 27.8 cm.The results of theoretical analysis and numerical simulation are highly consistent.Given the room mining method adopted in the deposit,the appropriate mining height is finalized to be 4 mto 6 m.
引文
[1]庾莉萍.积极解决我国钾资源短缺的问题[J].磷肥与复肥,2007,22(6):7-11.
[2]王孝峰.我国与世界钾资源及开发利用现状[J].磷肥与复肥,2005,20(1):10-13.
[3]李雨峰,李国政.钾盐尾矿充填数值模拟计算探讨[J].矿冶,2013,22(2):24-28.
[4]石亮,郝万东,江小军,等.固体钾盐地下开采工艺与设备配套技术研究[J].金属矿山,2015,(12):46-49.
[5]吴立新,王金庄.煤柱屈服区宽度计算及其影响因素分析[J].煤炭学报,1995,20(6):625-631.
[2]王孝峰.我国与世界钾资源及开发利用现状[J].磷肥与复肥,2005,20(1):10-13.
[3]李雨峰,李国政.钾盐尾矿充填数值模拟计算探讨[J].矿冶,2013,22(2):24-28.
[4]石亮,郝万东,江小军,等.固体钾盐地下开采工艺与设备配套技术研究[J].金属矿山,2015,(12):46-49.
[5]吴立新,王金庄.煤柱屈服区宽度计算及其影响因素分析[J].煤炭学报,1995,20(6):625-631.