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在井巷施工中,什么是三八作业,什么是作业?(2 / 2)

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工作内容与流程:

与三八作业类似,各班次按照施工计划进行掘进、支护等工作。

由于班次增多,每个班次可能更加专注于特定的施工环节或区域。

人员组织与协调:

需要更加精细地安排各班次的人员配置和工作任务。

加强交接班管理,确保信息准确传递和施工连续性。

需要注意的是,“三八作业”和“四六作业”的选择取决于具体的施工条件、工程量、工期要求以及工人的实际情况。在实际应用中,应根据具体情况灵活调整作业制度和人员组织方式,以确保施工安全、质量和进度。同时,还应关注工人的身心健康和劳动保护,为他们提供良好的工作环境和必要的福利待遇。

在景汉施工中,实施三八作业和四六作业时,人员组织和协调主要通过明确岗位职责、合理调配人员队伍规模、设立联络员岗位以及利用现代科技手段进行信息共享和进度监控等方式进行。同时,注重团队建设,增强凝聚力和向心力,确保施工顺利进行。

巷道施工中的锚喷支护是锚杆支护与喷射混凝土支护的联合使用,以锚为主,以喷为辅。它可提高围岩稳定性和承载能力,具有工艺简单、机械化程度高、施工速度快、节约投资等优点,是井巷支护的一项重大改革。

在巷道施工的锚喷支护中,锚杆和喷射混凝土各自发挥着关键作用。

锚杆的作用

支承围岩:锚杆可阻止围岩变形,发挥岩石本身的强度而起到支护作用。它增强了节理面和岩层间的摩擦力,从而增强了岩块或岩层的稳定性。具体来说,锚杆通过其悬吊作用、组合作用和加固作用,能够支承并稳定围岩,防止围岩松动和垮落。

提高整体稳定性:锚杆还能使混凝土应力均匀分布,改变其变形性能,进而增强锚喷支护的整体工作性能。

喷射混凝土的作用

及时支撑与充填:喷射混凝土支护具有良好的物理力学性能,特别是抗压强度较高,可达20MPa以上。它能紧跟掘进工作面,起到及时支撑围岩的作用,有效地控制了围岩的变形和破坏。同时,由于喷射速度高,混凝土能及时地充填围岩的裂隙、节理和凹穴,大大提高了围岩的强度。

隔绝保护:喷射混凝土层封闭了围岩表面,完全隔绝了空气、水与围岩的接触,有效地防止了风化、潮解引起的围岩破坏与剥落。这有助于保持围岩的稳定性和强度。

柔性支护:喷射混凝土的黏结力大,同时喷层较薄,具有一定的柔性。它既能和围岩粘贴在一起产生一定量的共同变形,减小喷层中的弯矩和张应力,又能对围岩变形加以控制。

综上所述,锚杆和喷射混凝土在锚喷支护中相互协作,共同提高了巷道的稳定性和承载能力。这种联合支护方式在巷道施工中得到了广泛应用,并取得了良好的效果。

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