Numerical Analyses on Deformation and Failure Characteristics of Surrounding Rock of Gob-Side Entry Retention by Roof Cutting

Table 1

The difference of gob-side entry retention by roof cutting and by packing.

Process	Gob-side entry retention by roof cutting	Gob-side entry retention by packing
①	Dig out a roadway	Dig out two roadways in advance
②	Dig out the open-off cut	Dig out the open-off cut
③	Working face mining	Working face mining
④	Dig out the other roadway space at the same time	Fill and retain roadway behind the working face
⑤	The roof was cut and the roadway was retained behind the working face	Dig out the other roadway
⑥	Dig out the other open-off cut	Dig out the other open-off cut
⑦	The other working face mining	The other working face mining
⑧	Dig out the other roadway space at the same time	—