Research on Water Disaster Governance and Prevention and Control Technology for Working Face Floor
Taking Yushupo Coal Industry in Ningwu,Shanxi Province as the engineering background,in response to the problems of small waterproof layer thickness and high water inrush threat,theoretical analysis,industrial testing,and on-site measurement methods are used to analyze the water filling water source,water filling channel,and water filling intensity of the working face.The mine water disaster prevention and control measures for directional drilling and grouting modification of the floor are proposed,reducing the threat of floor water to the working face stoping.The results show that surface water does not pose a direct threat to the working face,and the aquifer of sandstone fissures in the roof and the aquifer of karst fissures in the Ordovician limestone will be the main sources of water inflow in the working face;Through drilling exploration and grouting modification comprehensive governance,the water resistance performance of the waterproof layer is increased and the weak area of the floor is eliminated.The on-site geophysical exploration results show that the main fissures in the floor stratum are filled with mud and solidified,resulting in a significant increase in resistivity value.The grouting modification has a more obvious sealing effect on water containing fissures,which can effectively prevent mine water disaster accidents caused by the outburst of Ordovician limestone water through the water conducting channel during the mining and excavation process.
mine water disasterwater filling factorprevention and control measuregrouting modification
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