高应力软岩及形成条件课程毕业设计外文文献翻译.doc

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1、EnglishUnder high stress soft crag mine pit tunnel supports and protectionsAbstractAlong with the coal mine mining depth unceasing increase, the mine shaft coal mine tunnel will be in the higher crustal stress environment, especially in the geologic structure activity intense area, the mine shaft tu

2、nnel supports and protections and the stability guaranteed even more with difficulty.Studies under the high crustal stress soft crag environment the tunnel science supports and protections way is guarantees the coal mine excavation depth portion coal bed the key.And formed the condition on the high

3、stress soft crag basic concept to carry on the discussion, in grasped the high stress soft crag tunnel the distortion characteristic and in the supports and protections principle foundation, take the cotton rose mining area white bright coal mine mine shaft high stress soft crag tunnel supports and protections as the object, has conducted the research and the practice to 3 different support