Rock burst prevention method through deep hole blasting and depressurizing

Abstract

The invention provides a rock burst prevention method through deep hole blasting and depressurizing. The rock burst prevention method comprises the steps that 1, rock burst monitoring signals are detected in an upper roadway and in a lower roadway of a working face of a coal bed with the risk of rock bursts and are compared with the normal value and the obvious characteristics of rock bursts occurring in adjacent regions, field detection is conducted on the hypocenter location and the drilling quantity of coal bodies, a highly-concentrated stressed zone is divided, and a dangerous zone is delineated; 2, a guide depressurizing roadway is dug along the upper roadway towards the center of the dangerous zone of the rock bursts, blasting and depressurizing holes are drilled in the guide depressurizing roadway in the direction of top plate surrounding rock and bottom plate surrounding rock, after explosives are installed, the blasting and depressurizing holes are sealed through yellow mud, and secure detonation is conducted in the guide depressurizing roadway outside the blasting and depressurizing holes; and 3, after blasting and depressurizing danger relieving is conducted in the dangerous zone of the rock bursts, the depressurizing effect is analyzed and detected, and when the depressurizing effect does not reach the detection standard, secondary danger relieving is conducted through the same method till the depressurizing effect reaches the standard. According to the rock burst prevention method through deep hole blasting and depressurizing, the depressurizing danger relieving effect can be improved, the risk of the rock bursts and the anti-burst cost are reduced, and coal mine safety production is ensured.

Description

technical field [0001] The invention relates to partial relief of rockburst hazards in the underground mining process of coal mines, in particular to a method for preventing and controlling rockburst by deep hole blasting for pressure relief. Background technique [0002] Rock burst is a world-class scientific problem in the field of coal mine underground engineering and rock mechanics, which seriously threatens mine safety production. In the process of prevention and control of rock burst in coal mines in my country, the "four-in-one" comprehensive anti-scouring measures of prediction, prevention, inspection and safety protection are implemented. Risk prediction is the premise and prevention is the key. The prevention and control of mine rockburst danger includes two aspects: regional defense and local danger relief. Through mining protective layers, rationally arranging the mining range, pressure relief blasting, water injection and pressure relief and other danger relief ...

AI Technical Summary

Problems solved by technology

It can be seen that the management of mine rock burst has not yet reached the level of effective control fundamentally, and further improvement and innovation are needed for the pressure relief measures of rock burst

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