不同构造部位地应力对压裂裂缝形态的控制

针对压裂裂缝形态的传统方法主要根据煤岩性质进行判识，未考虑构造力对其控制作用的影响，以沁水盆地中、南部的晋城矿区西部为例，以水力压裂施工中破裂压力、停泵压力等数据为基础，结合水力压裂测量地应力原理，计算出不同构造部位水平最小、最大应力和垂直应力；应用多元回归分析方法得出回归函数；根据回归函数确定出不同构造部位水平缝和垂直缝转化的临界深度.与传统经验方法相比，判识的可靠度更高.

Stress's influence in different tectonic positions on fracturing interstitial morphology

At present,the differentiating about the fracturing interstitial morphology mainly used by coal property,this traditional method didn't consider the influences between tectonic stress and the depth of coal-bed.In light of this,the area that its anticline and syncline were turned and overlaid,its fracturing scale was great,its exploration degree was high,this area live in the western Jincheng diggings in the southern Qinshui basin.Based on the data in the process of hydraulic fracturing,combined with the principle that hydraulic fracturing measure the geology stress,the minimal horizontal stress,the maximal horizontal stress and vertical stress in the different tectonic positions were computed;by the multivariate nonlinear regression analysis,regressive functions about the data were educed.Finally,according to the regressive functions,critical depth about the transformation between horizontal and vertical crack in the different tectonic positions were educed.Its reliability is higher than traditional method.