Study On The New Water Inrush Disaster Mode Theory Of ’Snowmelt Runoff-ancient Gully’

By the limitations of the energy occurrence and the coal resources distributioncharacteristics, the western development strategy in the long-term national energydevelopment plan is implemented in order to meet the growing energy demand. Dueto the different geological background, western China presents a series ofhydrogeological structural feature. Western China’s special hydrogeologicalconditions result in the emergence of many new mine water inrush problems to bestudied and solved.The main mining coal seam is Jurassic in EBu coal mine in Xinjiang, with littlerainfall and not rich roof aquifer. The idea of not serious water inrush disaster in themine area is overthrew by the fact of the water inrush of1335m3/h in workface1106in2009.In this thesis, taking EBu coal mine as a represented example, a series of keytheories and technologies, such as the study of hydrogeological structural features, theestablish of hazard mechanisms model in special conditions, the practice of watercontrol techniques, energy saving applications and innovation construction technology,are carried out to achieve effective control of typical mine water disaster in westernChina.Firstly, this thesis takes a comparative analysis of the hydrogeological structuredifferences between the study area and eastern China’s coal mine, proposingexploration methods, such as geophysical and drilling, to carry out the research. Thesnowmelt of Tianshan is the main water recharge source and the ancient gully is thecontrolling factor of runoff and local rich of water. Combined theoretical analysis withexploration methods, hydrogeological structural features of EBu coal mine are studied,The establishment of conceptual model and the new water inrush disaster mode of‘snowmelt runoff-ancient gully’ are proposed to analyze the causes of water inrushmechanism and sum up the new water inrush characteristics by contrasting with othercommon modes. Secondly, based on the flow field simulation and evolution ofdifferent projects, this thesis put forward the integrated water inrush controltechniques of ‘grouting curtain closure and open channel drainage’ from and ‘regionalhigh vertical closure dewatering technology’, and non-powered dewatering method,respectively aiming at cutting off water source and plugging channel. As a result ofthese methods, the water inflow is reduced and the risk of water inrush is avoided.Finally, the non-powered dewatering method and pipe roof construction realize safety mining and verify the the research results.The main results of this thesis, based on the study of the hydrogeologicalstructure,mine water inrush type, hydrogeology,mine water control techniques,formed a set of targeted integrated water control theory and technology.The researchprovides technical support for western China’s water disaster issues and a theoreticalbasis for coal mine with the similar hydrogeological structure at home and abroad.