为解决全断面硬岩掘进机在极端复杂地质掘进效率低下的难题，考虑极端复杂地质环境条件和全断面硬岩掘进机技术特点，首先，制定极端复杂地质全断面硬岩掘进机技术指标，研制极端复杂地质全断面硬岩掘进机，提出变截面收敛地层扩挖技术；然后，基于破碎围岩地质特征，建立关键参数控制、小导管化学灌浆、管棚注浆、小导洞开挖技术协同作业方法，并应用于解决破碎围岩地层；针对岩渣堆积掘进效率低下的问题，建立机械除渣和皮带机出渣联合清渣模式；最后，通过高黎贡山极端复杂地质掘进验证了本文研究成果。结果表明： 1）全断面硬岩掘进机在Ⅱ、Ⅲ级围岩条件具有较高的进尺速度，设备完好率较高； 2）Ⅳ、Ⅴ级围岩为主的破碎地层具有较好的适应性，实现刀具磨损一般的情况下最高月进尺达到了438 m，平均月进尺为412 m，表明具有良好的地质适应性。
The fullface rock boring machine works
inefficiently in extremely complex geology. To solve the problem, based on the
consideration of extremely complex geological environment conditions and
technical characteristics of fullface rock boring
machine, the following work were done: First, technical indexes of fullface rock boring machine in extremely complex geology are
formulated, and the fullface rock boring machine for
extremely complex geology is developed, and the expanding excavation technology
for variable crosssection convergence stratum is
proposed. Second, in view of the geological characteristics of broken
surrounding rock, the cooperative operation methods of key parameter control,
small tube chemical grouting, pipe shed grouting and small pilot tunnel
excavation technology are established, which are applied to solve the broken
surrounding rock stratum; Third, aiming at the problem of low efficiency of
rock slag accumulation excavation, the combined slag removal mode of mechanical
slag removal and belt conveyor slag removal is established; Finally, the
extremely complex geological excavation in Gaoligong Mountain verified the
research results. The results show that: (1) The full face Hard Rock Roadheader
has high footage speed and high equipment integrity rate in class II and III
surrounding rock conditions. (2) The broken stratum mainly composed of class IV
and V surrounding rock has good adaptability, and the maximum monthly footage
reaches 438 m and the average monthly footage is 412 m under the general
condition of tool wear, indicating that it has good geological adaptability.
