Stress Evolution Law of Surrounding Rock with Gob-Side Entry RetainingbyRoofCuttingandPressureRelease inCompositeRoof

State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China School of Mechanics and Civil Engineering, China University of Mining & Technology (Beijing), Beijing 100083, China College of Mechanical and Architectural Engineering, Taishan University, Tai’an, Shandong 271000, China Department of Civil Engineering, Nanyang Institute of Technology, Nanyang, Henan 473004, China