...国矿权网上交易中心 关键词： 地表厚松散层；浅埋煤层；组合关键层；滑落失稳；台阶切落[gap=930]Key words： thick loose bed；shallow seam；combinatorial key strata；instability to sliding；roof step..
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同时，理论分析了地表厚松散层浅埋煤层顶板不存在砌体梁结构，因而不能应用砌体梁理论计算支架载荷。
Theoretical Analysed the roof without voussoir beam structure in shallow seam mining under thick unconsolidated layers, thus, cann't use voussoir beam theory to compute the force of supports.
此外，厚松散层、地表采动程度、工作面推进速度、采煤方法与顶板管理方法、开采程序及时间因素等对采场覆岩空间结构均有一定影响。
Moreover, there are some other influencing factors such as: thick loose bed, surface mining degree, impel speed of working face, coal mining and roof manage methods, mining procedure and time.
厚松散层薄基岩下开采引起的地表移动规律及地表移动参数，有其明显的自身特点和规律。
The regularity and parameter of surface movement aroused by mining under thick soil layer and thin base rock have its obvious characteristic and regularity.
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