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GAS EXPLOSION PREVENTION METHOD FOR BREAKAGE FACE GOAF OF COAL MINE
GAS EXPLOSION PREVENTION METHOD FOR BREAKAGE FACE GOAF OF COAL MINE
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机译：煤矿断面采空区瓦斯爆炸预防方法
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摘要
FIELD: mines, particularly means to prevent dust-laden air-gas explosions in goaf and adjoining mine excavations.;SUBSTANCE: method involves periodically supplying foam in goaf behind powered support to create isolating strips. Isolating strips are made of construction foam based on liquid pre-polymer with propellant to create hard polyurethane. Initial construction foam pouring height is equal to half of excavated seam thickness m. Minimal isolating strip width Ls is equal to excavated seam thickness.;EFFECT: increased mechanical strength of isolating foam strips, decreased labor inputs for isolating strip creation, increased simplicity and improved mining safety.;1 dwg
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机译：领域：矿山，特别是防止采空区和附近矿井中充满粉尘的气体爆炸的手段。实质：该方法涉及定期在采空区中向动力支撑后面供应采空区泡沫，以形成隔离带。隔离条由基于液态预聚物和推进剂的建筑泡沫制成，可产生硬质聚氨酯。初始施工泡沫的浇注高度等于开挖缝厚度m的一半。最小的隔离带宽度L s 等于开挖的煤层厚度。效果：增加隔离泡沫带的机械强度，减少隔离带产生的劳动投入，增加简易性并提高采矿安全性。1dwg
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