Technology system and application of “artificial pre-fracture layer” by high level whole layer blasting for pressure releasing to source prevention and control of rockburst

Active pressure relief is an important measure for source controlling of rockburst in coal mines. The current active pressure relief prevention and control method, or using the arranging holes along the roadway of the mining face, or underground in-situ hydraulic fracturing technology, has some shortcomings such as limited pressure relief protection range and constrained by the progress of pressure relief operation. When a surface hydraulic fracturing prevention system is used, it has the advantages of a wide range long-term of pressure relief, but may have the problem of high early investment, etc. Therefore, adhering to the innovative strategic ideas for pressure relief to prevent and control rock burst, which is from the source, prevention and economic efficiency, it is imperative to propose a new type of regional pressure relief source prevention technology system that is easy to practice, significant in effect, and can be comprehensively promoted. This paper proposes a new pressure relief technology syst