Double-layer contemporarily excavated in same direction deep-buried-tunnel rock burst removing structure and application thereof

Abstract

The invention belongs to the field of underground construction, and particularly relates to a double-layer contemporarily excavated in the same direction deep-buried-tunnel rock burst removing structure and application thereof. The double-layer contemporarily excavated in the same direction deep-buried-tunnel rock burst removing structure and application thereof changes the shape of a rock mass in a region of stress concentration of a deep-buried tunnel through drilling holes, reasonably arranging blast holes and arrangement directions, and controlling a firing order and a deslagging order by adopting an excavation blasting mode of short footage and multi-cycle, an energy accumulation level of a rock mass weight is eliminated or reduced, and construction safety is greatly improved (including personnel safety and equipment safety); and meanwhile the tunneling progress is effectively ensured, and the construction period is shortened in the premise that the quality is guaranteed.

Description

technical field [0001] The invention belongs to the field of underground engineering, and in particular relates to a rockburst relief structure for a deep buried tunnel excavated simultaneously and in the same direction with two layers and its application. Background technique [0002] Rockburst is the destruction of surrounding rock caused by the sudden release of potential energy or strain energy accumulated in the rock mass during the excavation process of underground engineering, which can lead to casualties, damage to the working face or equipment, and its basic characteristics are sudden and violent. Affected by the construction period or other factors, it is sometimes necessary to excavate multiple caverns on the upper and lower floors at the same time. When the distance between two rock masses of such deep underground caverns is smaller than the diameter of the upper and lower caverns, rockburst of the rock mass at this position is very likely to occur. The damage d...

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Problems solved by technology

[0003] Up to now, in the construction of deep underground projects in the world, there is no fixed double-layer simultaneous excavation rockburst construction control method. In China, the method of step-by-step excavation is often used, but this method requires a lot of manpower, Financial and time costs, the more effective method of rockburst control is basically blank

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