Shaanxi Yanchang Petroleum Mining Co. , Ltd.
Shaanxi Yanchang Petroleum Yulin Kekegai Coal Industry Co. , Ltd.
Beijing China Coal Mine Engineering Company Limited
National Engineering Research Center of Deep Shaft Construction

全断面隧道掘进机(TBM)具有高度机械化、自动化、掘进效率高等优势,已逐步应用于煤矿斜井与岩巷掘进工程。通过分析可可盖煤矿斜井穿越的洛河组地层特性对斜井TBM始发硐室围岩稳定性的影响,开展现场锚杆拉拔力测试、原位强度测试、撑靴支撑性能模拟等试验分析,并提出了超长斜井TBM始发硐室围岩加固及TBM撑靴支撑方案。研究结果表明,洛河组地层TBM始发硐室围岩的锚杆拉拔力均能达到100kN以上,测试段洛河组地层岩石平均抗压强度为23.1MPa,单体支柱支撑围岩受压强度达到33MPa时,围岩未发生溃散、崩裂现象。基于现场测试结果,提出了TBM始发硐口处顶部管棚加固、掘进段顶部锚网喷支护和TBM进硐稳定支撑推进方案。经过洛河组地层TBM直接进硐掘进的工业试验,验证了洛河组地层TBM始发硐室围岩加固技术的可靠性和安全性,可为同类地层斜井TBM直接进硐方案设计与施工提供参考。

The full - section tunnel boring machine ( TBM) has advantages in high mechanization, automation, and high excavation efficiency. It has gradually been applied to coal mine inclined shafts and rock tunnel excavation projects. Based on geological influence of Luohe Formation, crossing Kekegai Coal Mine inclined shaft, the stability of surrounding rock of incline initial chamber, field anchor pull and force test, in - situ strength test, and jack lifting simulation test are conducted and analyzed. A plan for surrounding rock reinforcement of TBM starting chamber and TBM jack supporting for long inclined shaft is proposed. The research results indicate that the anchor pull force of the surrounding rock of the starting chamber in Luohe Formation can reach more than kN. The average compressive strength of the tested section in Luohe Formation is 23. 1 MPa. When the compressive stress on single supported wall rock reaches MPa, there is no collapse or cracking in surrounding rock. Based on the on-site test results, a reinforcement and stable advancement plan for the top pipe shed of TBM starting chamber, the top anchor-mesh-shotcreting support in the excavation section, and TBM advancing support in chamber is proposed. Industrial tests of direct chamber excavation using TBM in Luohe Formation have verified the safety of the reinforcement technology for the surrounding rock of TBM starting chamber in Luohe Formation. The research results can provide references for similar geological incline for TBM in chamber excavation schemes.

陕西省重点研发计划项目(2020GY-139,2022GY-150)

汪青仓,刘全辉,宋朝阳,等.超长斜井TBM掘进始发硐室围岩稳定性分析及加固技术研究[J].煤炭工程,2024,56(12):32-37.