Rock burst is a dynamic disaster that occurs during coal mining,
characterized by the sudden and violent release of elastic deformation energy
accumulated in coal and rock. The majority of rock bursts, approximately 90%,
happens in roadways. Roadway impact failure is not only influenced by impact
energy, but also by the distance from the impact source. To address this, the
concept of energy distance ratio is introduced, which represents the ratio of
energy released by the impact source to the distance to the roadway. By
considering the static load superposition mechanism of rock bursts and the
balance theory of impulse energy absorption, various factors are taken into
account, including the characteristics of the impact source energy distance
ratio, roadway failure degree, energy absorption of supporting components, and
energy absorption of weak structures. Based on these considerations, a
corresponding relationship between the energy level of rock bursts and roadway
support strength is established. The roadway support technology based on “four
high anchor mesh +” is determined, which includes the use of high-strength
anchor mesh combined with other support elements. The safety and reliability of
roadway support technology under rock bursts are classified into P1-P4 levels
according to the energy distance ratio of the impact source. Each level
corresponds to the “four high anchor mesh +” combined support technology with
different support strength. The research findings suggest that “four high”
anchor mesh support is suitable for non-impact roadways with energy distance
ratios in the magnitude of 102 rock bursts. “Four high anchor mesh
+1” combined support, which includes O-shaped steel sheds, energy absorption
and anti-impact unit frames, and weak surrounding rock structures, can prevent
103 magnitude rock bursts. “Four high anchor mesh +2” combined
support is effective against 104 magnitude rock bursts, while “four
high anchor mesh +3” combined support can prevent 105 magnitude rock
bursts. Rock bursts with magnitudes of 106 and above require remote
treatment and removal from production. Engineering examples are provided to
demonstrate the anti-impact support scheme and parameter design of roadways.
These examples help verify the feasibility and practicality of the theoretical
research results. The research outcomes have valuable implications for the
theoretical research and engineering practice of rock burst roadway support in
coal mines in China.