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shen bu da duan mian zuo shi er ci zhi hu ji shu yan jiu
Author(s): 
Pages: 39-40,58
Year: Issue:  12
Journal: Coal

Keyword:  大断面硐室围岩松动圈二次支护底板治理;
Abstract: 某矿Ⅱ61下采区架空乘人车深部大断面硐室为该矿深部采区重要硐室,硐室由于断面大且使用要求苛刻、长度短且变化多和周围巷道布置密集等特点控制难度大,对该硐室进行围岩松动圈测试,测试结果表明:大断面硐室全断面塑性区都比较发育,且底板治理显得尤为重要。 FLAC数值模拟结果表明二次支护(控制底板)能显著改善围岩应力状态,提高围岩自身承载能力。现场工业性试验结果表明:二次支护(控制底板)围岩控制效果良好。
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