沉积环境与影响矿井设计的顶板稳定性因素的探讨

煤层顶板的稳定性不仅是影响矿井开采技术条件中的一项主要内容,而且也是进行矿井设计与选择合理支护方法的基础。众所周知,由于顶板条件造成的冒顶事故是生产矿井中最常见、最容易发生的事故。据国内外有关事故的统计资料表明,因冒顶造成的井下伤亡事故常占各类事故之首。为了分析和预测煤层顶板的稳定性,重塑顶板形成时的沉积环境是一种有效的方法。在影响煤层顶板稳定性的诸因素中,顶板岩石的性质常起着主导作

RELATIONSHIP BETWEEN SEDIMENTARY ENVIRONMENTS AND THE INFLUENCE OF COAL ROOF STABILITY ON MINE PLANNING

The sedimentary environments of No. 9 coal roof in the Taiyuan Formation have been reconstructed in this paper with the aid of core records, columnar borehole sections, logging curves, chemistry and grain size analysis of the rocks and minerals from 47 boreholes in the study area. The sedimentary facies on the roof include flood lake deposits, distributary channel deposits, natural levee deposits, crevasse-splay deposits. Combined the environmental analysis of the coal-bearing series with mine safety and production, this paper has opened vast vistas for the research and utilization of the sedimentary environments.