摘要
为正确评价远距离下保护层开采对被保护层的卸压增透效果,指导被保护层瓦斯抽采,防止煤与瓦斯突出,采用理论分析与数值计算相结合的方法,确定了太原组11#煤层(保护层)的覆岩主关键层和亚关键层,其中,主关键层位于太原组中段,即砂泥岩段,主关键层的存在降低了保护层11#煤层开采后对被保护层21#煤层的卸压增透效果。该研究对保护层开采效果评价具有一定意义。
Aimed at correctly evaluating the effect of permeability to protective layer by mining long distance protecting layer, and guiding the gas extraction of protective layer, and preventing coal and gas outburst, this paper determines primary key stratum and inferior key stratum in overburden by theoretical analysis and numerical calculation. The primary key stratum is located in the middle of Taiyuan forma- tion, namely, sand-mud stone member. The existence of primary key stratum decreases the effect of pres- sure relief and permeability to 21# influenced by early mined 1~ coal seam. The study is of certain signifi- cance for evaluating the effect of protective layer mining.
出处
《黑龙江科技学院学报》
CAS
2013年第4期398-400,共3页
Journal of Heilongjiang Institute of Science and Technology
基金
中国煤炭工业协会科学技术研究指导性计划项目(MTKJ2009-295
MTKJ2009-296)
河南省教育厅自然科学研究计划项目(2009B62002)
关键词
太原组
保护层
关键层
Taiyuan formation
protective seam
key stratum
