厚松散层矿区综放开采地表沉降规律研究
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摘要
为了研究厚松散层矿区特厚煤层综放开采对地表沉陷规律的影响,以坡西煤矿P1501综放工作面地表观测站观测数据为基础,研究了综放开采对厚松散层矿区地表移动变形预计参数及动态参数的影响,结果表明,相较于一般采矿地质条件,在厚松散层下特厚煤层综放开采引起的地表下沉系数与水平移动系数偏大,分别为0.88和0.69,而主要影响角正切、开采影响传播角及拐点偏移距偏小,分别为1.71°、54.2°及-0.03H_0~0.11H_0;地表移动初始期较短,其所占地表总移动时间的比值仅为9.6%,而活跃期较长,其所占总移动时间的比值为50.6%,同时阶段下沉量占总下沉量的比值接近97.3%。
In order to study the influence law of extra-thick coal seam fully mechanized top-coal caving on surface subsidence under thick coal seam unconsolidated formation,and on the basis of the surface movement observation data of P1501 working face in Poxi Coal Mine, the effects of fully-mechanized top coal caving on the parameters of surface movement and deformation and dynamic parameters are studied under thick unconsolidated formation. It was concluded that,compared to general mining geological conditions, the surface subsidence coefficient and horizontal movement coefficient caused by fully mechanized caving mining are larger under the thick unconsolidated formation,which is 0. 88 and 0. 69 respectively,while the main influence angle tangent,the mining influence propagation angle and the inflection offset are smaller,is 1. 71°,54. 2°,and-0. 03 H0~ 0. 11 H0 respectively. The initial period of surface movement is relatively short,and the ratio of total surface movement time is only 9. 6%,while the active phase is longer,and the ratio of the total moving time is 50. 6%,the ratio of the stage subsidence to the total subsidence is 97. 3%.
In order to study the influence law of extra-thick coal seam fully mechanized top-coal caving on surface subsidence under thick coal seam unconsolidated formation,and on the basis of the surface movement observation data of P1501 working face in Poxi Coal Mine, the effects of fully-mechanized top coal caving on the parameters of surface movement and deformation and dynamic parameters are studied under thick unconsolidated formation. It was concluded that,compared to general mining geological conditions, the surface subsidence coefficient and horizontal movement coefficient caused by fully mechanized caving mining are larger under the thick unconsolidated formation,which is 0. 88 and 0. 69 respectively,while the main influence angle tangent,the mining influence propagation angle and the inflection offset are smaller,is 1. 71°,54. 2°,and-0. 03 H0~ 0. 11 H0 respectively. The initial period of surface movement is relatively short,and the ratio of total surface movement time is only 9. 6%,while the active phase is longer,and the ratio of the total moving time is 50. 6%,the ratio of the stage subsidence to the total subsidence is 97. 3%.
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]李国华,任艳芳,徐天发,等.厚松散层浅埋煤层工作面矿压显现规律研究[J].煤炭工程,2013,45(1):76-78.
[3]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.
[4]刘义新,戴华阳,姜耀东,等.厚松散层大采深下采煤地表移动规律研究[J].煤炭科学技术,2013(5):117-120.
[5]王寅浩.厚松散层大采高条件下围岩拱形垮落的运动规律[J].煤矿安全,2014(8):221-223.
[6]李德海,许国胜,余华中.厚松散层煤层开采地表动态移动变形特征研究[J].煤炭科学技术,2014(7):103-106.
[7]刘义新,戴华阳,姜耀东.厚松散层矿区地表移动盆地边界角确定方法[J].煤矿安全,2012(9):47-49.
[8]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.
[9]郭玉芳,孟凡迪,陈俊杰.厚松散层开采条件下地表沉陷数值模拟分析[J].煤炭工程,2014,46(6):103-105.
[10]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.
[11]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.
[12]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.
[13]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.
[14]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):106-109.
[15]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.
[16]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.
[17]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]李国华,任艳芳,徐天发,等.厚松散层浅埋煤层工作面矿压显现规律研究[J].煤炭工程,2013,45(1):76-78.
[3]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.
[4]刘义新,戴华阳,姜耀东,等.厚松散层大采深下采煤地表移动规律研究[J].煤炭科学技术,2013(5):117-120.
[5]王寅浩.厚松散层大采高条件下围岩拱形垮落的运动规律[J].煤矿安全,2014(8):221-223.
[6]李德海,许国胜,余华中.厚松散层煤层开采地表动态移动变形特征研究[J].煤炭科学技术,2014(7):103-106.
[7]刘义新,戴华阳,姜耀东.厚松散层矿区地表移动盆地边界角确定方法[J].煤矿安全,2012(9):47-49.
[8]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.
[9]郭玉芳,孟凡迪,陈俊杰.厚松散层开采条件下地表沉陷数值模拟分析[J].煤炭工程,2014,46(6):103-105.
[10]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.
[11]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.
[12]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.
[13]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.
[14]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):106-109.
[15]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.
[16]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.
[17]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.