Mining surrounding rock fracture sliding starting condition and instability process analysis method and system

Abstract

The invention provides a mining surrounding rock fracture sliding starting condition and instability process analysis method and system, and relates to the technical field of mining engineering dynamic disaster prediction and prevention. The method and system can effectively predict dynamic disasters and greatly reduce the occurrence frequency and hazard degree of deep mining dynamic disasters, and is high in field practicability. According to the method, vertical fracture and horizontal action sliding of an immediate roof and / or an old roof corresponding to a goaf are / is used as judgment bases to analyze the instability state of mining surrounding rocks; the method specifically comprises the steps that a plurality of force sensors, acoustic emission monitoring equipment and micro-seismicsensors which are connected with a monitoring center are arranged in the immediate roof and / or the old roof and are used for collecting the real-time horizontal acting force of the position where thesensors are located and calculating original data needed by real-time vertical fracture energy; and the monitoring center is used for processing the collected data and judging whether early warning iscarried out or not according to a processing result. The technical scheme is suitable for the process of monitoring the collapse and instability of the surrounding rock.

Description

【Technical field】 [0001] The invention relates to the technical field of prediction and prevention of dynamic disasters in mining engineering, in particular to a method and system for analyzing the start-up conditions and instability process of mining surrounding rock fracture sliding. 【Background technique】 [0002] With the gradual mining of mining projects to the deep, the in-situ stress is enhanced, and a large goaf is formed in the mining of coal rocks, causing the goaf to directly cover the roof or even the old roof to collapse, and dynamic disasters appear frequently, which poses a major threat to the safety of coal mining. influences. However, at present, the analysis of the cause of the roof cap drop or dynamic disaster in the goaf is concentrated on the strength and stiffness of the surrounding rock, and less analysis is made on the instability caused by the fracture and sliding of the mining surrounding rock. Start-up conditions and analysis methods of instabilit...

AI Technical Summary

Problems solved by technology

However, at present, the analysis of the cause of the roof cap drop or dynamic disaster in the goaf is concentrated on the strength and stiffness of the surrounding rock, and less analysis is made on the instability caused by the fracture and sliding of the mining surrounding rock. Start-up Conditions and Analytical Method of Instability Process

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