煤的物理特性对水力冲孔卸压范围的影响  

Impact of physical properties of coal on pressure relief range of hydraulic flushing

作　　者：刘发义[1] 宋志强[2] 李定启[3] 张家宝[3] Liu Fayi Song Zhiqiang Li Dingqi Zhang Jiabao(Shanxi Jincheng Anthracite Mining Group Co. , Ltd. ,Jincheng Q4SQQ6, China Zhaozhuang Coal Mine, Shanxi Jincheng Anthracite Mining group Co. ,Ltd. ,Jincheng Q4SQQ5 , China Henan Polytechnic University, Jiaozuo 454000, China)

机构地区：[1]山西晋煤集团,山西晋城048006 [2]山西晋煤集团赵庄矿,山西晋城048005 [3]河南理工大学,河南焦作454000

出　　处：《能源与环保》2017年第5期47-50,共4页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家自然科学基金(51404094);山西省煤层气联合基金(2012012010);中国博士后科学基金(2014M561988);河南理工大学博士基金(B2012-026)

摘　　要：以赵庄矿3号煤层为研究对象,针对煤的物理特性对水力冲孔/扩孔卸压范围的影响关系,采用FLAC^(3D)模拟,研究了煤的抗剪强度,内聚力等因素对水力冲孔效果的影响,得出如下结论:煤的抗剪强度对扩孔后卸压范围影响较为显著,煤的抗剪强度越小,冲孔/扩孔后的影响半径越大;冲孔/扩孔后的影响半径随内聚力增加而减小;当内聚力较小时,内聚力变化对模拟结果影响较大;当内聚力较大时,内聚力变化对模拟结果影响较小;随着内摩擦角增大,冲孔/扩孔后影响半径近似呈线性减小。Taking No. 3 coal seam of Zhaozhuang Mine as the research object, the impact of physical properties of coal on the pressure relief range of hydraulic flushing was analyzed by the FLAC3D simulation. The following conclusions were obtained：the shear strength of coal has a significant impact on the pressure relief range after hydraulic flushing in coal hole ; the smaller the shearing strength of the coal is,the greater the radius of influence of hydraulic flushing is;the radius of influence decreases with the increase of cohesion;when the cohesion is small,the change of cohesion has little effect on the result of the simulation;when the cohesion is large,the change of co-hesion greatly influences the result of the simulation ; with the increase of internal friction angle, the radius of influence after hydraulic flushing declines linearly.

关 键 词：软煤层 水力冲孔 物理特性 影响范围 

分 类 号：TD713.34[矿业工程—矿井通风与安全]