水压致裂法测试矿井软岩巷道地应力研究  

Study on Geostress Measurement by Hydrallic Fracturing Method in Mine Soft Rock Roadway

作　　者：曾昭友[1,2] 

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003 [2]平顶山天安煤业股份有限公司一矿,河南平顶山467011

出　　处：《煤炭科学技术》2012年第12期31-34,共4页Coal Science and Technology

摘　　要：为获取矿井深部地应力信息,揭示地应力特征及其随埋深的变化规律,采用水压致裂法对平煤一矿三水平下延主运输巷进行地应力测试,同时采用应变解除法对不同埋深的7条巷道的地应力进行实测,得出了该矿区地应力的分布特征。结果表明:深部开采后,矿井属于高地应力区,矿区最大主应力为31.70 MPa,最大主应力为近水平方向,主要受构造应力控制;3个主应力均与埋深呈近似线性增大关系,其中最大主应力的增加幅度最为显著,应力梯度为2.75 MPa/hm,据所得地应力分布情况,对巷道采取了科学合理的支护和加固措施,实现了矿井高应力区的灾害控制。In order to obtain the mine deep geostress information and to reveal the geostress features and the variation law with the depth increased, a hydraulic fracturing method was applied to the geostress test conducted in the main transportation roadway extended below the No. 3 level of Pingmei No. 1 mine. Meanwhile, the strain releasing method was applied to the site measurements of the geostress in different depth 7 roadways and the distribution features of the geostress in the mining area were obtained. The results showed that after the deep mining operations conducted, the mine was a high geostress zone, the max main stress in the mining area was 31.70 MPa, the max main stress was in a horizontal direction and the mine was mainly controlled by the structural stress. Three main stresses were all in a linear increased relationship to the mining depth, the increasing extent of the max main stress in the three was obvious and the pressure gradient was 2. 75 MPa/hm. According to the geostress distribution conditions obtained, scientific and rational sapport and reinforcement measures were conducted to the mine roadway and the disasters control of the mine high geostress zone was realized.

关 键 词：地应力 深埋巷道 水压致裂法 构造应力 

分 类 号：TD311[矿业工程—矿井建设]