Geological prediction system for constructing tunnel passing through coal measure strata

Abstract

The invention discloses a geological prediction method for constructing a tunnel passing through coal measure strata. The condition of the tunnel passing through the coal measure strata is specifically analyzed in a way of geological record, geophysical prospecting analysis or advance borehole according to specific condition based on macroscopic analysis which is adopted in sequence; the obtained information is classified so as to predict the geological condition of a main job and the geologic hazard of the coal measure strata; and the correlative information and data are used for completing the construction of the geological prediction system for constructing tunnel passing through coal measure strata. The invention provides a system for perfectly and exactly predicting the geology for constructing the tunnel passing through coal measure strata.

Description

technical field [0001] The invention relates to a tunnel construction geological forecast system, in particular to a construction geological forecast method for a tunnel passing through a coal-measure stratum. Background technique [0002] With the rapid development of my country's infrastructure construction and the development of the western region, a large number of tunnel projects have been launched, many of which are long and complex geological tunnels that pass through coal-measure strata. For example, the Jiazhuqing Tunnel of the Nanning-Kunming Railway has a total length of 4990m, of which the length of the coal-measure strata is 1157m; another example is the Yundingshan Tunnel of the Dacheng Line, which has a total length of 7858m, and the gas concentration reaches 98% at the highest time. For the construction of tunnels passing through coal-measure strata, geological forecasting is not only necessary but also urgent. At the same time, engineering practice also pro...

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Problems solved by technology

[0004] Due to the complexity and variability of the geological structure, if the geological state in front of the tunnel face cannot be accurately ascertained, landslides, water gushing and gas hazards will easily occur, which will cause major safety accidents

[0005] Tunnel engineering is a geological project, and most tunnels have the characteristics of large buried depth and long tunnel line, and the geological conditions through which they pass are complex. It is difficult to fully identify the existing geological problems in the early investigation work, especially for those with great safety risks. For gas tunnels, construction geological work such as geological analysis and advanced geological forecast must be done well.

[0006] The advanced forecasting of tunnel engineering has been booming in recent years, and a variety of forecasting instruments and equipment have been newly developed. However, due to the shortcomings of various instruments and equipment in the forecasting, it is difficult to rely on a single forecasting method. It is difficult to guarantee the accuracy of forecast results

It can be seen that the current domestic geological forecasting work focuses on developing advanced detection technology and carrying out advanced detection work, and does not pay enough attention to geological analysis methods, and fails to reasonably combine detection methods with geological analysis methods. In addition, the analysis and prediction The method is single, and a complete set of technical method system has not been established

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