近水平煤层开采地表移动角量参数研究

Study on Angle Parameters of Surface Movement in Flat Coal Seam Mining

为了提高保护煤柱尺寸设计的准确性,分析了近水平开采地表移动角量参数的影响因素,通过力学分析给出了近水平煤层开采地表移动角量参数的准则表达式,根据大量的实测资料综合分析,利用非线性回归分析方法建立了地表移动角量参数与地质采矿条件之关系,给出了近水平煤层开采地表移动盆地内边界角、移动角和充分采动角的计算公式.通过实例进行对比分析,地表移动角量参数的计算值与现场实测结果非常接近.

In order to improve the veracity of dimension design of the protective coal pillar,Factors affecting angle parameters of surface movement in flat coal seam mining are analyzed;criterion formulas for calculating such angle parameters are derived by mechanical analysis.Based on a mass of field survey data,relations of angle parameters and geological mining conditions are developed by nonlinear regression analysis method.Formula for calculating the angle of draw,the angle of critical deformation,and the angle of full subsidence for flat seam mining are established.An instance shows that the angle parameters calculated by nonlinear regression are very close to the field measurement results.