Through the study of ground deformation,variable mining ratio method was put foreward to raise coal output ratio,effective measures to realize the method were introduced.

• 通过对地表移动变形规律的认识,提出了采用变采留比方法以提高条带法开采采出率,并对该方法影响效果进行了分析,提出了实施此方法的有效措施。