In order to study surface deformation law of thick coal seam mining when the mining depth and mining height was variable,double factors of mining depth,mining thickness and small buried depth,thickness of No.11401 to No.21601 (up)two working face on the surface movement deformation field measurement were analyzed in Huangyuchuan Mine.The results showed that No.21601 (up)working face on the earth's surface deformation degree was greater than No.11401 working face.After two faces full mining surface subsidence value was approximately equal than the reciprocal of the ratio of the two working faces base mining.The same geological conditions the mining ratio concept could be used to measure surface deformation damage evaluation of thick coal seam mining,the base was small surface deformation damage seriously.When the mining ratio increased,the surface deformation accordingly reduced.The end use of indoor physical simulation experiment to simulate the same deep effect of surface deformation rule of thick coal seam mining,the reasonahility of conclusion was verified,the prediction of thick coal seam mining ground surface deformation and evaluation provided the reference.%为研究厚煤层开采因采深与采高2个因素均变化影响时的地表变形规律,分别对黄玉川煤矿埋深大、采高大的11401和埋深浅、采高小的216上01两个工作面的地表移动变形规律进行了现场实测与分析.研究结果表明:216上01工作面的地表变形程度远大于1 1401工作面;2个工作面充分采动后地表下沉量之比近似等于2个工作面基采比之比的倒数;相同地质条件下可采用基采比概念来衡量评价厚煤层开采地表变形破坏程度,即基采比较小时地表变形破坏严重,反之当基采比增大时地表变形相应减弱.最终通过室内物理相似模拟试验模拟了厚煤层开采地表变形规律的深厚效应,验证了结论的合理性,可为厚煤层开采地表变形的预测和评价提供参考.
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