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淮南矿务局孔集煤矿于1975年开始试用光爆锚喷支护新技术,但是由于缺乏经验,走了不少弯路,几经反复,对锚喷支护原理的认识,由浅入深,由表及里,不断深化,不断提高,终于掌握了施工要领,光爆锚喷支护逐步扩大推广应用到大断面,斜巷、大峒室和交岔点的支护,尤其近两年来,全矿光爆锚喷支护巷道大幅度上升,占岩巷进尺的70％以上。 随着光爆锚喷支护范围和数量的不断扩大,在施工过程中产生的粉尘浓度高达88.4毫克/米~3,回弹率经过多次现场实测在 40％
Huainan Mining Bureau Kong set coal mine in 1975 trial Guangboanzhu spray support new technology, but due to lack of experience, go a lot of detours, after repeated, anchor spray protection theory, from shallow to deep, from the table And, continue to deepen, continue to improve, and finally mastered the construction essentials, light burst anchor spraying support for the gradual expansion to promote the use of large cross-section, oblique lane, Ohashi room and the intersection point of support, especially in the past two years, all mine Light burst anchor spray supporting roadway rose sharply, accounting for more than 70% of rock tunnel footage. With the explosion of light burst anchor spray range and the continuous expansion of dust concentration generated in the construction process up to 88.4 mg / m ~ 3, the rebound rate after many field measurements at 40%