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斜交正作洞口能较好地解决复杂地形软弱围岩区段进洞口稳定问题,斜交正作洞口主要是利用梯形套拱构成虚似岩壁,以创造在斜交洞口下正常的正开挖进洞的条件,论述了斜交正作洞口的优缺点、适用条件,对斜交正作洞口中关键结构梯形套拱进行详细地受力分析,并提出了设计应用中的对策。
Oblique cross hole is to be able to better solve the complex terrain weak surrounding rock section of the entrance to the stability of the main hole is a skewed orthodontic is the use of trapezoidal arch arch to form a virtual rock wall to create a normal opening in the oblique hole is open The conditions of digging into the cave are discussed. The advantages and disadvantages of the orthogonally boring hole are discussed, the suitable conditions are applied, and the detailed stress analysis of the key structure trapezoidal arch in the cross hole is made. And the countermeasures in the design and application are put forward.