An early warning method for dangerous areas in deep mining based on stress-drilling cuttings gradient

Abstract

The present invention relates to the field of coal mining, specifically a method for early warning of dangerous areas in deep mining based on the gradient of stress-drilling cuttings, collecting data; performing mining numerical simulation; calculating stress distribution data with space and time distribution data; Calculate the drill cuttings discharge per unit time and unit space when the drill bit is drilling into different rock formation media; divide the stress sudden change area; divide the gas sudden change area; Stress monitoring obtains the stress field, gas field, and hydrological field in the monitoring area, and controls the early warning device for early warning, thereby reducing the occurrence of disasters. The present invention connects the bracket structure and the protection structure to the surrounding rock simultaneously through the anchor rod structure, which can improve the firmness of the installation of the bracket structure and the protection structure, thereby improving the protection effect, and can support and protect during the excavation and mining process to ensure the safety of the work. personnel safety.

Description

technical field [0001] The invention relates to the field of coal mining, in particular to an early warning method for deep mining dangerous areas based on a stress-drill cuttings volume gradient. Background technique [0002] The occurrence of most geological disasters in mines is accompanied by cracks or fissures in the rock formations, which cause disasters in the process of mining. At present, in the process of excavation and mining, stress detection, groundwater detection, gas detection, etc. are used for detection. The mining process is monitored by means to prevent the occurrence of geological disasters; at the same time, the excavation support device is set up to support and protect the excavated roadway. However, most of the existing excavation support devices have a fixed structure and a large volume, which requires a large space during transportation, which makes it inconvenient for the device to move and install quickly and easily in the underground roadway, thus...

AI Technical Summary

Problems solved by technology

However, most of the existing excavation support devices are fixed in structure and large in size, and need to occupy a large space during transportation, which makes it inconvenient for the devices to be conveniently and quickly moved and installed in the underground roadway, which greatly affects the excavation. There are certain defects in the transportation and erection of support devices. The occurrence of most geological disasters in mines is accompanied by cracks or cracks in the rock stratum, which causes disasters in the mining process. It takes a certain amount of time to install the device. During this window period, there are insufficient protective measures in the roadway, which affects the safety of tunneling construction. On the other hand, the existing support devices often use rigid support. When geological disasters occur, surrounding rock The stress generated by the deformation all acts on the support device. When the pressure acting on the support device exceeds the structural rigidity and strength of the support device itself, the support device only relies on rigid support to resist the impact pressure, which is easy to cause damage

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