期刊
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
卷 105, 期 -, 页码 85-97出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijrmms.2018.03.013
关键词
Water-permeable fractured zone; Height and shape; In situ detection; Stratum movement; Composite strata structure
资金
- National Natural Science Foundation of China [51774195, 51304127]
- China Postdoctoral Science Foundation [2016M590646]
- Qingdao Postdoctoral Applied Research Foundation [2016121]
- Tai'shan Scholar Talent Team Support Plan for Advantaged & Unique Discipline Areas
The height and boundary shape of a water-permeable fractured zone (WFZ) play an important role in mining safety under challenging conditions; for example, when the coal seam is subject to a confined aquifer or the roadway is designed in close range to the coal seam. For the accurate estimation of the WFZ height, the theoretical prediction method was introduced based on the overlying composite strata structure and an empirical equation. In situ detection of the WFZ height and shape was performed in the Zhaizhen coal mine, China. The field detection was executed by injecting water into boreholes. Based on the analysis results of the variation in water seepage along these boreholes, the fracture intensity and the permeability of the overlying strata were studied, and the height and boundary shape of the WFZ were also confirmed. The measured height was consistent with the theoretical estimation, verifying that the WFZ developed upwards through the strata group acing as a unit. The final boundary of the WFZ presented an irregular saddle shape, and the boundary angle was approximately 75 degrees-78 degrees. According to the height and shape of the WFZ induced by mining of the lower coal seam, the fracture intensity and scope of the surrounding rock and the mining feasibility of the upper coal seam was evaluated in the Zhaizhen mine. A suitable roadway layout of the upper coal seam was also designed.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据