^pof;
Resources;
&;
Safety;
Engineering;
China;
University;
of;
Mining;
and;
Technology;
(Beijing);
Beijing;
100083;
^pNational;
CoalAssociation;
100713;
^pCoal;
Subsidiary;
Shenhua;
Energy;
Co.;
Ltd;
Baotou;
014000;
综采放顶煤; 倾斜厚煤层; 显现规律; 顶板压力; 回风巷道; 早期阶段; 采空区; 元计算;