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为缓解永锦能源云煤二矿采掘接替紧张局面,同时避免下部相邻工作面沿空掘巷和回采期间老空水的威胁,结合矿井23300运输顺槽“两软一硬”工程地质条件和所选用的高水充填料性能特征,运用理论计算,确定沿空留巷巷旁充填材料水灰比为1.5∶1,充填体宽度为2 m,可满足顶板支护强度要求。
In order to alleviate the tension of the mining of Yongyun Energy cloud and coal mine No. 2 and to avoid the danger of the old empty water along the goaf in the lower part of the adjacent working face and in the process of mining, combined with the project of “two soft and one hard” Conditions and selected high-water filling material performance characteristics, using theoretical calculations to determine gob-side entry retaining filler water-cement ratio of 1.5: 1, filling body width of 2 m, to meet the roof support strength requirements.