Abstract: To prevent the deformation of Paner No.2 Coal Mine 11123 working face cutting under the current part of the bottom pumping roadway（undertake belt transport task） due to the dynamic pressure,a new solution is introduced.After the first time of working face was under pressure,reinforcement of grouting anchor cables on the basis of original anchor net and cable support were applied and the thickness of the loosening zone of surrounding rock of roadway was detected by ground penetrating radar,to analyze the feasibility of supporting scheme.Ground penetrating radar detection results showed:at the first measurement（working face pushed over 50 m）,second measurement（working face pushed over 90 m）,third measurement（working face pushed over 150 m）,the thickness of loosening zone develops rapidly;compared with the third time,the thickness of loosening ring tended to be stable at the fourth time（the face pushes over 200 m） and the fifth time（the face pushes over 200 m）.The thickness of loosening zone formed by bottom drainage roadway was about 1.3 m,it fits in the small and medium loosening circle.The strengthened support effect meets the requirements of safety production.