Research on water immersion damage characteristics and equivalent width of coal pillar.

ABSTRACT: Affected by weakening effect of water in the goaf, the bearing capacity of coal pillar reduced, and coal pillar rock burst is prone to occur, which is a serious threat to mine safety in production. In order to study the equivalent width and stability of coal pillar in water-rich coal seam, taking the section coal pillar of a working face as the research object, combined with laboratory test, theoretical analysis, simulation and engineering practice, the stress, elastic core area width, damage degree and energy accumulation of 36 m water-immersed coal pillar and 26 m, 28 m, 30 m, 32 m, 36 m unimmersed coal pillars are analyzed. The research results show that: (1) The reasonable width of coal pillar under flooded and unflooded conditions is 36.09 m and 29.58 m, respectively. The width has be

SUBMITTER: Shi Z 

PROVIDER: S-EPMC11682402 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature