关键词: 巷道掘进面, 循环掘进, 扰动应力, 近距离采空区, 煤层顶板

Abstract: In order to explore the disturbance effect of roadway under near goaf on adjacent roof during repeated excavation, based on the mining environment of 22103 transportation roadway after coal mining in Hulusu Coal Mine 2-1, the disturbance relationship between unloading disturbance stress and adjacent roof in anchoring area was obtained by simulating multiple excavation progress of roadway. The results show that the disturbance stress of adjacent roof subjected to cyclic excavation shows a decreasing trend of waveform, and the disturbance area can be divided into near field disturbance area, middle field disturbance area and far field disturbance area according to the stress wave propagation characteristics. The relation between the disturbance stress and the distance of the roof can be regarded as "exponential function".The disturbed stress of the roof in the same position is less than that of the previous excavation, and the stress variation is almost the same each time. Field drilling peeping results show that the establishment of thick anchorage zone can greatly improve the integrity of roof strata.