Underwater mining method tunnel reasonable burial depth calculation method

Abstract

The invention discloses an underwater mining method tunnel reasonable burial depth calculation method. The underwater mining method tunnel reasonable burial depth calculation method comprises the following steps of obtaining the thickness of a sludge layer or a soft soil layer and the existing crack depth of a bed rock surface layer through geological drilling exploration, and calculating the existing crack depth of a soft soil covering layer at the top of a tunnel structure and the existing crack depth of the bed rock surface; measuring the height of a water head and the maximum width of an arch waist of a tunnel, and calculating the thickness of a safety protection layer considering the water insulation and permeation effects of a rock stratum according to coefficients of the water insulation and permeation effects of the rock stratum, the firmness coefficient of the rock and the safety margin; according to the foundation coefficient and the minimum resistance line of a single most dangerous cartridge bag, calculating the length of a water guide crack of a surrounding rock loose circle due to drilling and blasting; and calculating the reasonable burial depth of the mining methodtunnel. On the premise of ensuring the safety of the covering layer at the top of the tunnel, each of water prevention and drainage is no longer one of main factors influencing the tunnel constructionprogress during mining tunnel construction, and the drainage cost during tunnel operation can be greatly reduced.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to a method for calculating the reasonable buried depth of underwater mining tunnels. Background technique [0002] China is a large oceanic country with a coastline of 18,000 km and an island coastline of 14,000 km. my country's coastline spans 22 latitude zones, has more than 6,500 islands, and has world-famous straits such as the Bohai Strait, Taiwan Strait, and Qiongzhou Strait. Building cross-sea passages to break through the natural barriers of the ocean and expand the depth of national defense is a strategic requirement for the country's long-term stability. [0003] my country has numerous rivers and well-developed water systems. The total length of inland rivers is 430,000 kilometers, and there are more than 20 rivers with a length of more than 1,000 kilometers. There are more than 100 cities with a population of over one million in China, and more than 90% of them are ...

AI Technical Summary

Problems solved by technology

The mining method is one of the mainstream construction methods for tunnel construction. In the process of tunnel design, it is required to avoid excessive burial depth of underwater mining method tunnels, which will increase tunnel growth, increase construction costs, and increase operating costs; at the same time, it is necessary to prevent insufficient burial depth from causing water damage. Entering the tunnel affects the safety of the project

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