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With the increase of mining depth , soft rock roadway problems have become increasingly prominent, the urgent need to address the problem . In supporting the process , due to the the Highland stress of the surrounding rock , the expansion , as well as the presence of large-span cross-section makes the support , there are many difficulties and problems , can solve the soft rock roadway coal mining to develop in depth key production and safety . In this thesis, the use of theoretical analysis, numerical calculation method of combining on-site monitoring and engineering practice , the HS complex soft rock section chamber combined support and construction technology has been systematically studied . Firstly, analysis of concepts, classifications and mechanical properties of engineering soft rock , The anchor rope secondary coupling support this feature elaborate theory still has the bearing capacity of this feature is to make full use of engineering soft rock into the plastic zone , allowing the surrounding rock appropriate deformation , and the deformation of the supporting structure , coordination, coupling support ; and then use the rock loose circle theory to study the soft rock chamber support mechanism , and Dai Mine -580 central pumping station engineering background , targeted application engineering geological data and the FLAC3D numerical calculation of the initial design , the results show that the anchor rope support - initial design - on-site monitoring - Feedback - modify the design of dynamic design methods; on the basis of secondary support , can effectively improve the surrounding rock stress distribution , greatly reducing the amount of displacement of the roadway , the carrying capacity of the supporting structure , to ensure the long-term overall stability of the supporting structure ; and then through the secondary support : the anchor rope secondary coupling support the top and bottom of the pumping station and the deformation of the two groups are very small , the deformation is less than 150mm , in line with the soft rock supporting the strength of the surrounding rock deformation observations and the stiffness requirements , the final design construction techniques , using a full-face blasting , the phased brush large joint construction methods, to provide a reference value for future similar rock conditions , the construction of large cross section chamber .
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