The designed excavation section of a crushing chamber in a metal mine is 98.07 m2.The chamber is located in the weak rock stratum,the surrounding rock is loose and broken,and the self-stability is poor.The surrounding rock grade belongs to Class Ⅳ～Ⅴ rock.Because the stress distri-bution of surrounding rock is complicated and the construction is difficult,the measure ramp method is adopted in the construction of the crushing chamber in the weak rock stratum.Starting from the middle part of the main transport channel,the excavation measures ramp to the horizontal position of the crushing chamber,and then the crushing chamber is constructed in layers,and the work is carried out with the mechanized equipment such as drilling trolley,forklift truck and anchor bar trolley.This scheme effectively speeds up the construction progress and reduces the number of workers on the working face,and finally completes the construction of the crushing chamber safely and smoothly.The safe,efficient and rapid construction of the crushing chamber is realized by adopting the measure ramp method.
关键词
破碎硐室/措施斜坡道/分层施工/主运输通道中段/机械化作业
Key words
crushing chamber/measure ramp/stratified construction/main transport middle roadway/mechanized operation
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