Method and system for acquiring height of water flowing fractured zone in metal mine mining

Abstract

The invention relates to the field of mine rock mass safety, and provides a method and a system for acquiring the height of a water flowing fractured zone in metal mine mining, which are used for acquiring the internal friction angle and the cohesive force of a rock mass and the width and the height of a stope. And inputting the internal friction angle and the cohesive force of the rock mass and the width and the height of the stope into a pre-established water-flowing fractured zone height prediction model to obtain the height of the water-flowing fractured zone. The height of the flowing water fissure zone in metal mine mining can be accurately obtained, so that early warning can be carried out in the subsequent mining process.

Description

technical field [0001] The application relates to the field of mine rock mass safety, and in particular, to a method and system for obtaining the height of a water-conducting fracture zone in metal ore mining. Background technique [0002] After the ore body is mined, the roof of the stope (underground mining area) is damaged, and the damage area is from bottom to top, see image 3 , can be divided into caving zone, fissure development zone and bending subsidence zone, collectively known as the three zones. In the three zones, because in the caving zone and the fracture development zone, the deformation of the rock under the action of external force exceeds its maximum elastic deformation, and plastic failure will occur, and a remarkable feature when entering the plastic failure state is that The fractures in the rock are markedly developed. When the external force continues to increase or the deformation continues to increase, exceeding the rock's bearing limit (stress lim...

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Problems solved by technology

[0005] The height of the water-conducting fissure zone is affected by many factors. At present, it is difficult to establish an accurate mechanical model to solve it, and the height of the water-conducting fissure zone is a process of gradual development from bottom to top, which is a dynamic process. The difficulty of directly solving the model

At present, the model for the prediction of the height of the water-conducting fracture zone in metal mines uses the caving arch theory to predict, but it only considers the general modulus of the rock, and there are too few parameters to be accurate enough; or the empirical formula of the coal industry is used, but the coal There is a big difference between mining and metal mines. Coal is mined in a large area and layered, and metal mines are mostly localized. The size of the stope is limited. There are many problems in citing the experience formula of the coal industry

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