摘要
针对东欢坨矿冲积层厚度变化较大的特点,以该矿厚冲积层条件下多煤层多工作面开采地表观测站实测数据为基础,基于遗传算法反演了矿区不同冲积层与基岩厚度比条件的地表移动概率积分参数。结果表明:测区内实测最大下沉值为10893mm,最大倾斜为62.3mm/m,最大曲率为1.69mm/m^(2);采用遗传算法解决了多工作面开采概率积分参数反演问题,并对反演下沉系数进行修正,当矿区冲积层与基岩厚度比H_(s)/H_(j)≤1时,下沉系数0.82,主要影响角正切1.81,拐点偏移系数0.04,开采影响传播角90°-0.4α;当矿区冲积层与基岩厚度比H_(s)/H_(j)>1时,下沉系数0.96,主要影响角正切2.05,拐点偏移系数0.03,开采影响传播角90°-0.3α;研究成果在西村采动影响的应用分析中效果良好,验证了该矿条件地表移动规律和参数正确性。
Aiming at variation of alluvium thickness in Donghuantuo Coal Mine,based on the measured data of surface observation station of multi-seam and multi-working face mining under the condition of thick alluviu,the probability integral parameters of surface movement under the condition of different thickness ratio of alluvium to bedrock are inversed by genetic algorithm.The results show that the measured maximum subsidence is 10893 mm,the maximum inclination is 62.3 mm/m,and the maximum curvature is 1.69 mm/m^(2).Genetic algorithm is used to solve the problem of probability integral parameter inversion of multi-working face mining,and the inversion subsidence coefficient is corrected.When the thickness ratio of alluvium to bedrock H_(s)/H_(j)≤1,the subsidence coefficient is 0.82,the main influence angle tangent is 1.81,the inflection point offset coefficient is 0.04,and the mining influence propagation angle is 90°-0.4α;when H_(s)/H_(j)>1,subsidence coefficient is 0.96,main influence angle tangent is 2.05,corner offset coefficient is 0.03,mining influence propagation angle is 90°-0.3α.The research results have good effect in the mining influence analysis of Xi Village,which verifies the correctness of the surface movement law and parameters of the mine.
作者
马国平
MA Guo-ping(Kailuan(Group)Limited Liability Corporation,Tangshan 063018,China)
出处
《煤炭工程》
北大核心
2022年第5期146-151,共6页
Coal Engineering
关键词
遗传算法
厚冲积层
概率积分参数
冲积层与基岩厚度比
genetic algorithm
deep alluvium soil
probability integral parameter
thickness ratio of alluvium to bedrock
