Study on the Coal Pillar Weakening Technology in Close Distance Multi-Coal Seam Goaf
نویسندگان
چکیده
The pressure relief of coal pillars in close-distance multi-coal seam goaf is a complex engineering problem with the characteristics “dynamic mine pressure”. Hence, this paper studies such problems. First, influence factors pillar on mining face lower under condition were theoretically analyzed, and it was concluded that vertical stress most important element, followed by horizontal stress. Next, physical similarity simulation experiment designed to study distribution law floor before after release damage depth. Finally, technology monitoring method for blasting alleviation introduced implemented practice. After alleviated, surrounding rock redistributed, decreased 20%. adjacent rock’s deformation improved. This technology’s cost safety advantages are extraordinary helpful seams over close distances.
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ژورنال
عنوان ژورنال: Energies
سال: 2022
ISSN: ['1996-1073']
DOI: https://doi.org/10.3390/en15186532