摘要
基于实测数据,采用多元线性回归的方法深入研究了地质、采矿条件等对拐点偏距的影响,并建立了拐点偏距的回归计算模型.通过分析,得出影响拐点偏距的主要因素为覆岩抗压强度、采动程度、煤层倾角、采深和表土层厚度等.同时发现当覆岩中存在大于10m坚硬岩层时模型计算误差较大.采用多元线性回归方法重新建立了无大于10m坚硬岩层的时拐点偏距计算模型.该模型的拟合度、稳定性和精度都较高,能够满足地表移动变形预计的需要.
Based on measured data and using multiple linear analysis,the influence of geology and mining condition on inflection point is studied in depth and the model of regression calculation for inflection point is established.The analysis shows that the main impact factors of inflection point offset including compressive strength of overlying strata,mining extent,dip angle of coal seam,mining depth and the thickness of epipedon,etc.Meanwhile,it is found that the error of the model is relatively large when the thickness of hard formation of overlying strata is more than 10 m.By using multivariable linear regression,the model of calculating inflection point offset is re-established when there is no hard formation more than 10 mthick.The model is demonstrated to have good degree of fitting,stability and accuracy which is able to meet the demand of ground movement and deformation prediction.
作者
秦洪岩
题正义
李洋
CAI Qionghui;ZHANG Yi;ZHU Jianqing(College of Mathematics and Physics, SUST, Suzhou 215009, China;College of Civil Engineering, SUST, Suzhou 215011, China)
出处
《华中师范大学学报（自然科学版）》
CAS
北大核心
2018年第2期201-206,共6页
Journal of Central China Normal University：Natural Sciences
基金
国家自然科学基金项目(51174109)
中央高校基本科研业务费项目(3142017095)
关键词
拐点偏距
煤层倾角
松散层厚度
采动程度
采深
覆岩抗压强度
E1 Nabulsi fractional order model
the generalized Birkhoff systems
integrating factor
conserved quantity
