Wall Caving of Soft Coal Seam Working Face and Prevention and Control Technology
Taking 5102 coal mining face as the research object,a detailed analysis was conducted on the internal and external factors of the coal wall caving,and a series of prevention and control measures were formulated to enhance the bearing capacity of the soft coal wall itself and reduce the impact of roof subsidence on the coal wall.The strength of soft coal body can be improved by the method of"advanced large-scale water injection+local grouting".The use of ZF 2600/17/26 hydraulic support can not only enhance the management effect of the roof,but also reduce the subsidence of the roof and provide certain support force to the coal wall.After engineering application,the occurrence rate of soft coal seam caving during the subsequent mining period of 5102 coal mining face was significantly reduced,achieving effective prevention and control of soft coal seam caving.
soft coal seamwall cavingprevention and control technologyhydraulic support
万方数据
维普
