Dynamic detection method for mine mining-induced fracture

Abstract

The invention discloses a dynamic detection method for a mine mining-induced fracture. The difficulty and blindness of gas drainage level position gives rise to problems that the level position of the gas drainage borehole arrangement is too high, the mining-induced fracture is underdeveloped, the gas drainage difficulty is big and the efficiency is low; the excessive lower level position of the gas drainage borehole arrangement easily gives rise to problems that a working surface seriously leaks wind, the normal running of a mine ventilation system is affected, the stability of the rock stratum is bad, and the effective gas drainage time is short. The method comprises the following steps of: detecting positions, parameters and numbers of boreholes by design; constructing before mining a stopping line and detecting the boreholes, carrying out the water leakage detection and recording data; taking a vertical height as a standard to normalize detection data, forecasting the development height of the mining-induced fracture after different mining times. The method can improve conditions of blind hole arrangement, short service life and low efficiency aiming at high position gas mining, increases the reasonableness of the hole arrangement and prolongs the mining time; and the method is beneficial to the scientific formulation of an under-water-body mining system, reduces the possibility of water outgoing of the water body, reduces the cost of coal mining and gas mining and improves the economic efficiency.

Description

technical field

[0001] The invention relates to a dynamic detection method for mining cracks in mines. technical background

[0002] As more and more mines go deep, the hazards and prevention of mine gas are more important. Aiming at gas, which is a major disaster source in mines, many mines have established mine gas drainage systems as a fundamental measure to solve mine gas disasters. . The high-level gas drainage technology developed for gas control in adjacent and local coal seams will undoubtedly be an effective measure to solve the excessive gas gushing in the process of mine recovery, but due to the difficulty and blindness of the selection of drainage layers, high-level drainage The drilling arrangement is unreasonable, the cost is high, the efficiency is low, and the great waste of human resources and property is mainly due to the insufficient understanding of the development dynamics of the mining fracture zone in the mine, which has caused or because the stratum ...

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