关键词: 孤岛工作面, 矿压显现, 围岩变形, 超前支承压力

Abstract: Restricted by factors such as mine geological conditions，stope layout and excavation-min⁃ ing technology，some mines adopt the skip mining succession mode to form isolated island working faces with two sides exposed. Such working faces are generally confronted with the threat of strong ground pres⁃ sure during mining，which seriously endangers production safety. Taking the 3210 large mining height iso⁃ lated island working face of Wangpo Coal Mine as the research object，this study systematically explored the mining pressure behavior law，advance abutment pressure distribution characteristics and surrounding rock deformation and failure mechanism of the isolated island working face by comprehensively using theo⁃ retical analysis，numerical simulation and field measurement methods. The results show that the stress con⁃ centration degree of the 3210 working face increases significantly during the mining stage，with intense ground pressure behavior and prominent surrounding rock damage and failure problems. Field ground pres⁃ sure monitoring clarified the periodic weighting interval of the working face and the deformation and failure law of the transportation gateway. Based on the governance concept of "technology leadership，concept in⁃ novation and combination of theory and practice"，a ground pressure control system for large mining height isolated island working faces is constructed，which includes innovative support concept，high-efficiency surrounding rock control technology and full-cycle ground pressure governance evaluation. Engineering ap⁃ plication shows that the surrounding rock displacement of the 3210 return air gateway tends to be stable 2 months after its formation，the roof subsidence is controlled within 10 mm，and the two-side convergence is no more than 190 mm. The surrounding rock deformation of the gateway is effectively controlled，realiz⁃
ing the safe and efficient mining of the working face. The research results can provide technical reference
for ground pressure control of isolated island working faces under similar geological conditions.

Key words: isolated island working face, mining pressure behavior, surrounding rock deformation, ad? vance abutment pressure