Research on Deformation Characteristics and Control Technology of Soft Rock Roadway under Dynamic Disturbance

Abstract

In the mining process of an underground coal mine, the dynamic load often causes great damage to the roadway and affects the normal mining of coal mine. In this paper, the deformation of surrounding rocks under static load and different disturbance intensities is studied by numerical simulation. The results show that under the same static load condition, the greater the dynamic load strength is, the more obvious the roadway roof displacement subsidence is. With the increase in dynamic load propagation distance, the amplitude of the dynamic load waveform decreases gradually. Under the same disturbance load intensity, the variation of roadway displacement with different disturbance load frequencies is studied. According to the influence of dynamic load on the deformation of the roadway, a combined support plan of shotcrete anchor net and reinforcement anchor cable is proposed. Finally, the rationality of the optimized support scheme is verified by numerical simulation and field results. The results show that the combined support scheme can effectively increase the strength of the broken soft rock and reduce the deformation of the surrounding rock. At the same time, it releases the expansion energy generated by the mutual compression and deformation of the rock layers, effectively maintaining the long-term stability of the roadway.

Study on the seismic damage and dynamic support of roadway surrounding rock based on reconstructive transverse and longitudinal waves

“…Basarir et al (2019) proposed a support system consisting of rock bolt, cable bolt and shotcrete in order to cope with the displacements caused by large-scale mining operations, resulting in a considerable reduction rock displacements. Zang et al (2021) proposed an integrated support scheme of "double anchor cable + wire mesh + W steel belt", which improved the bearing capacity of the surrounding rock effectively. Sakhno and Sakhno (2023) investigated the dynamic stress and strain distribution in the surrounding rock by numerical simulation.…”

Large Deformation Characteristics of Surrounding Rock and Support Technology of Shallow-Buried Soft Rock Roadway: A Case Study

“…Roadways experience large deformations, such as layered soft rock roadways [15], cross roadways [16], close coal seam roadways [17], and steeply inclined rock layer roadway [18][19][20] due to complicated geological structures. Mining disturbance also contributes to a dramatic deformation of the roadway [21,22]. Water-based erosion in a water-rich roadway reduces its strength and serviceability [23,24].…”

Numerical Simulation Study on the Influence of Mine Earthquake on the Bolt Stress

“…Zang et al [1] studied the deformation process of surrounding rock under different static loads and different disturbances through numerical simulation and put forward the optimizing scheme of combined support. Wang et al [2] analyzed the deformation mechanism of the roadway and explained the importance of the support scheme and support form for the soft rock roadway.…”