厚松散层矿区综放开采地表移动变形规律
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摘要
以鑫龙煤矿首采工作面1501综放工作面地表移动观测数据为基础,研究了厚松散层地质采矿条件下综放开采对地表移动变形相关静态及动态参数的影响。结果表明:相较于一般采矿地质条件,在厚松散层下综放开采引起的地表下沉系数、水平移动系数及最大下沉速度系数偏大,分别为0.86、0.75和17.53;地表移动活跃期及衰退期较长,所占总移动时间的比值分别为58.0%和37.2%,阶段下沉量占总下沉量的比值分别为97.6%和2.0%,表明厚松散层下综放开采,地表将较长时间处于移动剧烈期且地表稳定所需时间较长。
On the basis of the surface movement observation data of 1501 working face in Xinlong Coal Mine, the influence of fully-mechanized top coal caving on the parameters of surface movement and deformation, surface correlation angle parameters and dynamic parameters are studied under the condition of thick unconsolidated layers. It was concluded that, compared to general mining geological conditions, the surface subsidence coefficient, horizontal movement coefficient and maximum coefficient of subsidence caused by fully mechanized caving mining are more larger under the thick unconsolidated layers, is 0.86, 0.75 and 17.53, respectively; the active stage and decline stage are longer, and the ratio of the total moving time is 58.0% and 37.2%, the ratio of the stage subsidence to the total subsidence is 97.6% and 2.0%. It shows that the surface will be in a long moving period, and the surface stability will take a long time under the mining of thick unconsolidated layers.
On the basis of the surface movement observation data of 1501 working face in Xinlong Coal Mine, the influence of fully-mechanized top coal caving on the parameters of surface movement and deformation, surface correlation angle parameters and dynamic parameters are studied under the condition of thick unconsolidated layers. It was concluded that, compared to general mining geological conditions, the surface subsidence coefficient, horizontal movement coefficient and maximum coefficient of subsidence caused by fully mechanized caving mining are more larger under the thick unconsolidated layers, is 0.86, 0.75 and 17.53, respectively; the active stage and decline stage are longer, and the ratio of the total moving time is 58.0% and 37.2%, the ratio of the stage subsidence to the total subsidence is 97.6% and 2.0%. It shows that the surface will be in a long moving period, and the surface stability will take a long time under the mining of thick unconsolidated layers.
引文
[1]侯得峰,李德海,许国胜,等.厚松散层下采高对地表动态沉降特征的影响[J].煤炭科学技术,2016(12):191-196.
[2]贾红果,曹庆贵,张贵彬,等.近厚松散含水层下综放覆岩破坏特征及安全开采分析[J].煤矿安全,2015(8):195-198.
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[6]陈志辉,程晓辉.饱和土体固结压缩和蠕变的热力学本构理论及模型分析[J].岩土工程学报,2014(3):489-498.
[7]隋旺华,狄乾生.开采沉陷土体变形与孔隙水压相互作用研究进展[J].工程地质学报,1999(4):303-309.
[8]杜锋,白海波.薄基岩综放采场直接顶结构力学模型分析[J].煤炭学报,2013(8):1331-1337.
[9]鞠金峰,许家林,王庆雄.大采高采场关键层“悬臂梁”结构运动型式及对矿压的影响[J].煤炭学报,2011(12):2115-2120.
[10]高超,徐乃忠,刘贵,等.特厚煤层综放开采地表沉陷规律实测研究[J].煤炭科学技术,2014(12):106.
[11]侯忠杰.地表厚松散层浅埋煤层组合关键层的稳定性分析[J].煤炭学报,2000(2):127-131.
[12]杜锋,白海波.厚松散层薄基岩综放开采覆岩破断机理研究[J].煤炭学报,2012(7):1105-1110.
[13]李宏斌,宋选民,刘兵晨.厚松散层覆岩下大采高综采工作面矿压规律研究[J].煤炭科学技术,2013(5):55-57.
[2]贾红果,曹庆贵,张贵彬,等.近厚松散含水层下综放覆岩破坏特征及安全开采分析[J].煤矿安全,2015(8):195-198.
[3]许延春,张玉卓.应用离散元法分析采矿引起厚松散层变形的特征[J].煤炭学报,2002(3):268-272.
[4]陈良松,汪青松,杨永国.巨厚松散层条件下地表移动变形特征[J].煤矿安全,2011(8):168-170.
[5]徐平,周跃进,张敏霞,等.厚松散层薄基岩充填开采覆岩裂隙发育分析[J].采矿与安全工程学报,2015(4):617-622.
[6]陈志辉,程晓辉.饱和土体固结压缩和蠕变的热力学本构理论及模型分析[J].岩土工程学报,2014(3):489-498.
[7]隋旺华,狄乾生.开采沉陷土体变形与孔隙水压相互作用研究进展[J].工程地质学报,1999(4):303-309.
[8]杜锋,白海波.薄基岩综放采场直接顶结构力学模型分析[J].煤炭学报,2013(8):1331-1337.
[9]鞠金峰,许家林,王庆雄.大采高采场关键层“悬臂梁”结构运动型式及对矿压的影响[J].煤炭学报,2011(12):2115-2120.
[10]高超,徐乃忠,刘贵,等.特厚煤层综放开采地表沉陷规律实测研究[J].煤炭科学技术,2014(12):106.
[11]侯忠杰.地表厚松散层浅埋煤层组合关键层的稳定性分析[J].煤炭学报,2000(2):127-131.
[12]杜锋,白海波.厚松散层薄基岩综放开采覆岩破断机理研究[J].煤炭学报,2012(7):1105-1110.
[13]李宏斌,宋选民,刘兵晨.厚松散层覆岩下大采高综采工作面矿压规律研究[J].煤炭科学技术,2013(5):55-57.