摘要
在统计钻孔见煤厚度的基础上,做出煤厚等值线图,运用MAPGIS软件的DTM模块,将等值线网格化。利用软件提取网格煤厚及可采区面积,计算煤厚变异系数、可采指数两个指标,定量评价煤层稳定性,并与经典统计学法结果进行对比。GIS网格法不仅提高了评价参数计算的精度,同时又降低了由于区域较小,钻孔点数量有限引起的误差,对煤层稳定性的定量评价结果更加合理准确。
A contour map of coal thickness was obtained on the statistics of drilling. The contour lines were then converted into grid by the DTM model of MAPGIS. Grid thickness and ruinable area extracted from the software were used to calculate the variation coefficient of the coal thickness and recoverable index in order to realize the quantitative assessment of stability and the comparison with traditional statistic results. The results show that GIS grid method could not only improve the precision of parameter calculation but also reduce the errors caused by small area and limited boreholes. The stability assessment is more reasonable and accurate.
出处
《山西煤炭》
2016年第5期28-31,共4页
Shanxi Coal
关键词
GIS网格
煤厚变异系数
可采指数
对比分析
GIS grid
variation coefficient of coal thickness
recoverable index
comparative analysis
