新集矿区地应力场特征研究  

Characteristics of in-situ stress field in Xinji coal mine

作　　者：师修昌[1] 鞠远江[2] 孟召平[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,地球科学与测绘工程学院,北京100083 [2]中国矿业大学资源与地球科学学院,江苏徐州221116

出　　处：《煤田地质与勘探》2014年第6期68-72,共5页Coal Geology & Exploration

基　　金：国家重点基础研究发展计划(973计划)项目(2012CB214705);国家自然科学基金项目(41372163;41172145;41030422);国家科技重大专项项目(2011ZX05063)

摘　　要：矿井动力现象如巷道变形破坏、煤和瓦斯突出及煤层底板突水等都与地应力密切相关.应用水压致裂法对新集矿区的原地应力进行了测量,确定原地系统深部围岩的应力状态,即原地应力的量值和方向,研究获得了矿区地应力的赋存规律和基本特征.测量结果分析表明：新集矿区地应力场以水平应力为主导,属于构造应力场类型;垂直主应力和最大、最小水平主应力均随埋深的增加呈近似线性增加;最大水平主应力与最小水平主应力的比值范围是1.01-1.29,反映新集矿区受构造作用较恒定;测压系数的范围是0.98-1.3,随深度变化不明显;新集矿区受到F10断层东西向的拉张应力,最大水平主应力方向为近EW向.最后探讨了原地系统不同构造部位地应力方向差异的原因,初步分析认为,是受到阜凤推覆体的影响.Mine dynamic phenomena such as deformation and destruction of roadway, coal-gas outburst and waterinrush from floor, are closely related to initial ground stress. The hydraulic fracturing method was used to measurein-situ stress of Xinji mine, confirmed in-situ stress state of surrounding rock in deep autochthonous system, themagnitude and orientation of in-situ stress, occurrence regularity and essential characteristics of in-situ stress inmining area have been put forward by the study. The analysis of measuring results indicated： the horizontal stressdominated the field stress of Xinji mine and had obvious tectonic stress features; The vertical, maximum andminimum principal stress would be increased with the mine depth, represented approximate linear growth; Ratio ofmaximum to minor horizontal principal stresses ranged from 1.01 to 1.29, Xinji mining area was relatively constantunder the action of geologic structure. Lateral pressure coefficient ranged from 0.98 to 1.3, changed inconspicuouslywith burial depth; The maximum horizontal principal stresses of Xinji mining area was close to EW under the functionof stretching stress in EW direction of fault F10. At last, the reason for difference between in-situ stress direction ofdiverse tectonic positions in autochthonous system was discussed, the analysis suggested that Fuyang-Fengtai nappewas the principal factor.

关 键 词：新集矿区 地应力场 地质构造 阜凤推覆体 

分 类 号：TD311[矿业工程—矿井建设]