摘要
基于更准确的测定煤层上覆岩层中"竖三带"的法向分布范围,提高高位钻孔瓦斯抽放效果,初步划分了煤层"竖三带"的法向分布范围,探讨了影响高位钻孔瓦斯抽放效果的关键因素为选择合理层位布置钻孔,而各钻孔的施工参数均应依据采空区内冒落带和裂隙带的高度来量化设计。论述了冒落带和裂隙带高度的现场观测与理论计算方法,并根据这两种计算结果,可统筹设计优化高瓦斯工作面上高位钻孔各抽放孔的施工参数。
In order to determination of normal distribution of ＂vertical three-zone＂ in coal seam overlying strata more accurate, improve the effect of high gas drainage drilling, normal distribution of ＂vertical three-zone＂ of coal seam is divided initially, choosing a resonable arrangement of layers drilling is the key factor which influence the effect of high gas drainage drilling is discussed, construction parameters of each drilling should quantitative designed based on the height of caving zone and fractured zone in goaf. Field observation and theoretical calculation method of height of caving zone and fractured zone are discussed, and construction parameter of each drainage hole of high level borehole on high gas working face could designed and optimized overall according to these two results.
出处
《现代矿业》
CAS
2011年第1期49-51,共3页
Modern Mining
关键词
高位钻孔
冒落带
裂隙带
测定
瓦斯抽放
High level borehole
Caving zone
Fractured zone
Determination
Gas drainage
