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深部沿空留巷需要高强度的巷旁充填体以保持巷道围岩稳定,针对不同配比条件下的充填材料强度进行室内试验研究。研究表明:水灰比在一定临界条件下,充填材料强度同水灰比成正比;相同水灰比条件下,充填材料强度同水泥含量成正比;矸石骨料可增加充填材料强度,进而减少水泥胶结料的用量,降低充填成本。
The deep gob-side entry retaining lane requires high-strength lane-side filling body to keep the surrounding rock of roadway stable, and the indoor test research is carried out according to the strength of filling material under different matching conditions. The results show that under certain critical conditions, the strength of filling material is proportional to the ratio of water to cement; under the same water / cement ratio, the strength of filling material is proportional to the content of cement; the aggregate of waste rock material can increase the strength of filling material, The amount of cementing materials, reducing filling costs.