Method for judging fractured through rock stratum

Abstract

The invention provides a method for judging a fractured through rock stratum. The method comprises the following steps: 1, collecting physical and mechanical parameters of a mine overlying strata columnar shape and all strata; wherein the physical and mechanical parameters comprise rock stratum thickness, mining height, tensile strength and compressive strength; 2, calculating the maximum relativesubsidence of the target rock stratum, the maximum relative subsidence of the rock stratum being equal to the mining height minus the caving zone broken expansion height and the rock stratum unloading expansion amount on the caving zone, 3, judging whether cracks penetrate through the rock stratum or not, and when the vertical crack penetration criterion value is larger than the compression-tension ratio, the vertical cracks can penetrate through the rock stratum; overlying rock vertical through cracks being important channels for communicating a confined aquifer and a working face. When thevertical through cracks expand from the working face roof to the aquifer, water inrush disasters occur. According to the method, guidance is provided for determining whether the cracks penetrate through the rock stratum or not, judgment is accurate and convenient, and the method has very important practical value for achieving safety production of a mine and ground ecological environment protection.

Description

technical field [0001] The invention relates to the technical field of mine mining, in particular to a method for judging that a crack penetrates a rock formation. Background technique [0002] China is a country with large coal resources and a large coal consumer. Most of the energy supply needs to be provided by coal. In 2019, coal still accounted for about 60% of the primary energy consumption. However, a large amount of coal mining will also bring many negative effects, such as ecological damage, surface subsidence, gas outburst and mine water inrush. Mine water inrush is generally ferocious, and often submerges working faces and tunnels in a short period of time, bringing harm to mine production and causing casualties. [0003] The necessary conditions for mine water inrush are sufficient water source and water inrush channel. Most of the working faces in China's mining areas are located under the Quaternary loose aquifers with abundant water resources, and the mine w...

AI Technical Summary

Problems solved by technology

However, a large amount of coal mining will also bring many negative effects, such as ecological damage, surface subsidence, gas outburst and mine water inrush, etc.

Mine water inrush is generally ferocious, and often floods the working face and tunnels in a short period of time, bringing harm to mine production and causing casualties

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