An innovative technology of fracturing hard strata from the ground for precontrol of rock burst in a coal mine

Abstract Rock bursts are one of the most common dynamic disasters in coal mines and seriously affect safety production. At present, there three types rock bursts: fault‐structure, fold‐structure, thick/hard‐roof bursts. First, paper proposed an innovative technology for mine ground fracturing to control those Then, new method, its devices, process, monitoring technique cracks were introduced. Next, we analyzed detailed procedures principles absorbing energy, blocking stress transmission, reducing overall strength. To illustrate effect bursts, a Voronoi block division method (VBDM) multistrength criteria (MSC) consisting Mohr–Coulomb Joint, Hoek–Brown strain–stress equivalent method. two numerical models using VBDM MSC established. One is fault‐structure burst with another that without. From simulation, it was concluded that: (1) The will increase τ / σ n , ratio shear normal fault, from 0.25 0.50, especially within 100 m working face fault. This situation indicates induce fault slip advance, thus releasing energy advance. (2) Fractured zones low formed by fracturing, which can reduce both upward extrusion pressure stress, thereby triggering slippage released be absorbed fractured zone, controlling advanced face, lowering danger burst.