关键词: 油页岩, 沿空掘巷, 动压区, 时空关系, 数值模拟, 现场实测

Abstract: In response to the problems of supporting, large deformation of surrounding rock in the process of gob-side entry driving in dynamic pressure area of fully-mechanized oil shale mining, comprehensive analysis of space-time relationship between driving and stoping, reinforcement scheme, and repairing techniques have been carried out. To start with, based on the theory and numerical simulation analysis, the deformation and stress distribution law of surrounding rock have been obtained, and then the driving method of roadway can be initially determined; after that, based on the observation results of mining pressure, the reasonable space-time relationship between driving and stoping has been set down. When driving is conducted, the reasonable delay distance is 136 m and the lagging days should not be less than 36 days; while when driving and mining are in opposite directions, the distance crossing the stopping line should be less than 50 m. According to the result of deformation observation, reinforcement scheme and repairing techniques are respectively designed for different locations of roadway, and the roadway can meet the production requirements after reinforcement or repair, which shows a certain guiding significance to the gob-side entry driving under the similar conditions.

Key words: oil shale, gob-side entry driving, dynamic pressure area, space-time relationship, numerical simulation, field measurement