Study On The Height Of Water Guide Fissure Zone In 15104 Fully Mechanized Coal Mining Face Of Pingquan Coal Industry

In this paper,first,by comparing the advantages and disadvantages of the actual measurement method of the water conduction fracture zone height,a comprehensive observation method using underground water conduction fracture zone height observer and borehole television imaging detection is proposed;then the main influencing factors of the development height of the water conduction fracture zone are analyzed The regression analysis of SPSS software was used to study the relationship between the influencing factors of the height of the water conduction fracture zone and the height of the water conduction fracture zone.Finally,the height of the water conduction fracture zone was calculated according to the relevant regulations and numerical simulation,and the Pingquan Coal Industry 15104 working face guide was designed.On the basis of the correction of borehole design parameters,on-site measurement of the height of the water-conducting fissure zone was carried out in the observation plan of the water fissure zone,and the development height of the water-conducting fissure was comprehensively determined and verified by theory.The main conclusions are as follows:(1)Analyze the geological conditions of the mine;compare a variety of on-site observation methods of water-conducting fissure zones.Considering the intuitive observation of the fissures and the permeability of the fissures,the underground waterconducting fissure zone height observation and borehole television imaging are used for comprehensive observation.(2)Analyzed the influence law of working face mining height,working face length,burial depth and other main influencing factors on the development height of water conducting fracture zone.Collected a part of mine geological data and measured results of water-conducting fissure zone height,taking the thickness-mining,oblique length,burial depth,lithology scale coefficient of hard rock as independent variables,waterconducting fissure zone height as dependent variable,and independent variable and dependent variable Using SPSS software for analysis,the influence strength of the water conduction fracture zone on the height of the water conduction fracture zone from high to low is in order of mining height,lithology ratio of hard rock,oblique length,and burial depth,and the water conduction fracture zone is obtained.Linear relationship between height and influencing factors.(3)According to the geological conditions of the 15104 working face of Pingquan Coal Industry,the theoretical height of the water conducting fissure zone of the 15104 working face is 43.47 m using the calculation formula in the relevant regulations;46.2m.An observation scheme for the water guide fissure zone of the 15104 working face was designed: the vertical distance between the end hole of the drilling hole and the coal seam was 50 m,the observation hole was constructed from the return air flute of the 15105 working face to the direction of the 15104 working face,and the drilling direction was perpendicular to the working face.;The contrast hole is constructed in the direction of solid coal,the borehole orientation is perpendicular to the working face,the distance between the holes is 1.5m,and the actual borehole diameter is 94 mm.(4)The borehole trajectory of the water-conducting fissure zone was analyzed and videoed using a mining borehole imager.On the basis of correcting the design parameters of the borehole,the observation method of the underground waterconducting fissure zone height observer was used to observe 1#,2# drilling water injection leakage,it is obtained that 1# borehole measures the water conduction fracture zone height is 39.18 m,2# borehole measures the water conduction fracture zone height is 38.45 m,and after comprehensive analysis,Pingquan Coal Industry 15104 works The height of the surface water conduction fracture zone is 39.18 m,and the ratio of the height of the water conduction fracture zone to the mining thickness of the working face is 14.The rock layer strata stretch rate is used to verify the reliability of the measured height of the water conducting fracture zone.This thesis consists of 33 figures,15 tables,and 68 references.