煤田地质与勘探
煤田地質與勘探
매전지질여감탐
COAL GEOLOGY & EXPLORATION
2014年
6期
68-72
,共5页
新集矿区%地应力场%地质构造%阜凤推覆体
新集礦區%地應力場%地質構造%阜鳳推覆體
신집광구%지응력장%지질구조%부봉추복체
Xinji mine%in-situ stress field%geological structure%Fuyang-Fengtai nappe
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。
礦井動力現象如巷道變形破壞、煤和瓦斯突齣及煤層底闆突水等都與地應力密切相關。應用水壓緻裂法對新集礦區的原地應力進行瞭測量，確定原地繫統深部圍巖的應力狀態，即原地應力的量值和方嚮，研究穫得瞭礦區地應力的賦存規律和基本特徵。測量結果分析錶明：新集礦區地應力場以水平應力為主導，屬于構造應力場類型；垂直主應力和最大、最小水平主應力均隨埋深的增加呈近似線性增加；最大水平主應力與最小水平主應力的比值範圍是1.01~1.29，反映新集礦區受構造作用較恆定；測壓繫數的範圍是0.98~1.3，隨深度變化不明顯；新集礦區受到 F10斷層東西嚮的拉張應力，最大水平主應力方嚮為近 EW 嚮。最後探討瞭原地繫統不同構造部位地應力方嚮差異的原因，初步分析認為，是受到阜鳳推覆體的影響。
광정동력현상여항도변형파배、매화와사돌출급매층저판돌수등도여지응력밀절상관。응용수압치렬법대신집광구적원지응력진행료측량，학정원지계통심부위암적응력상태，즉원지응력적량치화방향，연구획득료광구지응력적부존규률화기본특정。측량결과분석표명：신집광구지응력장이수평응력위주도，속우구조응력장류형；수직주응력화최대、최소수평주응력균수매심적증가정근사선성증가；최대수평주응력여최소수평주응력적비치범위시1.01~1.29，반영신집광구수구조작용교항정；측압계수적범위시0.98~1.3，수심도변화불명현；신집광구수도 F10단층동서향적랍장응력，최대수평주응력방향위근 EW 향。최후탐토료원지계통불동구조부위지응력방향차이적원인，초보분석인위，시수도부봉추복체적영향。
Mine dynamic phenomena such as deformation and destruction of roadway, coal-gas outburst and water inrush from floor, are closely related to initial ground stress. The hydraulic fracturing method was used to measure in-situ stress of Xinji mine, confirmed in-situ stress state of surrounding rock in deep autochthonous system, the magnitude and orientation of in-situ stress, occurrence regularity and essential characteristics of in-situ stress in mining area have been put forward by the study. The analysis of measuring results indicated: the horizontal stress dominated the field stress of Xinji mine and had obvious tectonic stress features; The vertical, maximum and minimum principal stress would be increased with the mine depth, represented approximate linear growth; Ratio of maximum to minor horizontal principal stresses ranged from 1.01 to 1.29, Xinji mining area was relatively constant under the action of geologic structure. Lateral pressure coefficient ranged from 0.98 to 1.3, changed inconspicuously with burial depth;The maximum horizontal principal stresses of Xinji mining area was close to EW under the function of stretching stress in EW direction of fault F10. At last, the reason for difference between in-situ stress direction of diverse tectonic positions in autochthonous system was discussed, the analysis suggested that Fuyang-Fengtai nappe was the principal factor.
