ú�㿪�ɺ��ϸ��Ҳ㽫�γ�ð������ѷ����������������Ӫ��ú���о�����Ȼ����������������������͹���ˮ�ĵ���������Ӧ�ø��Ҳ��ƻ����ۣ��ó�Ӫ��ú�����ð����϶���߶Ⱥͽ�������ص����Ӱ�����֮��Ϊ270 m��ԶС�ڸ�����ú����С�������( 838 m) ��������������ϴ�IJ����ȳ�����

After coal-bearing bed mining��the caving zone��fractured zone and bend zone would form in the overlaying strata�� According to the natural geographical��regional geological and hydrological geological conditions in Yingcheng coal mine��combining with overlaying strata damage theory��the height of caving fractured zone and the biggest influence depth of the building of Yingcheng coal mine are sum for 270 m��which far less than the minimum coal mining depth ( 838 m) ��therefore��the region will not produce larger uneven settlement��