Movement Rule of Overlying Strata under Extra-thick Magmatite and Its Disaster-causing Analysis
MA Fuwu
JIANG Jinquan
WU Quanlin
ZHANG Peipeng
Abstract：To aim at the condition that the overlying strata occurred with the high-located extra-thick magmatite, study was made on the breaking and movement law of the overlying strata under the extra-thick magmatite by using the simulation test method with the similar material, and the causes of sudden gas emission induced by the movement of the overburden extra-thick magmatite were revealed. Research showed that after the broken fissures developed into the extra-thick magmatie, the developmental morphology of the fissure zone developed from arch into the arch plate and the bed separation span of the magmatite at the bottom before its breaking developed to the maximum. The hard and extra-thick magmatite had the trapping effect on the separated-bed gas and its breaking movement can lead to the sharp rise of the separated-bed gas pressure and induce the sudden gas emission. Adopting the methods such as gas drainage, grouting into separated bed and strip mining can effectively prevent the sudden gas emission from the separated bed.
Keywords：extra-thick magmatitesimilar material simulationbroken fissuresarchoverburden bed separationsudden gas emission
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1-4,9 )