北皂矿海域和陆地煤层瓦斯储气条件对比分析  

Comparison Analysis on Gas Reservoir Condition in Sea Base and Land Base Seams in Beizao Mine

作　　者：王刚[1] 程卫民[1] 苗法田[2] 

机构地区：[1]山东科技大学资源与环境工程学院,山东青岛266510 [2]煤炭科学研究总院重庆研究院,重庆400037

出　　处：《煤炭科学技术》2010年第3期39-42,45,共5页Coal Science and Technology

摘　　要：论述了煤层埋藏深度与围岩的孔隙率的关系,并对陆地施工过程中条件相对较差的北皂煤矿四采区地层与海域地层,从岩性的单轴抗压强度、岩块膨胀率、岩块饱和吸水率、含水量和泊松比角度进行了对比,分析得出了北皂煤矿海域扩大区的地层沉积环境、岩性组合及煤的变质程度等方面与陆地煤层都非常相似,这些不是造成海陆煤层瓦斯变化的主导因素,而海域泥岩层良好的密闭性是决定海域开拓延深过程中瓦斯异常涌出现象的主要原因。With the statement on the relationship between the seam depth and the surround rock porosity rate, a comparison on the relative poor strata of No. 4 Mining Block in Beizao Mine and the sea-base strata during the land construction process from the lithological uniaxial compressive strength, rock swelling rate, rock saturated water rate, water content and Poisson＇s ratio angulations was conducted. The analysis showed that the strata deposit environment, lithological composition, coal metamorphism degree and others in the sea-base expansion area in Beizao Mine would be very similar to the land-base seam in the mine. All those were not caused by the main factors of the gas variation in the sea and land seam. The good air-tighten of the sea-base mud-stone stratum was the main factors of abnormal gas emission in the sea-base development and expansion process.

关 键 词：海域煤层 瓦斯赋存 孔隙率 围岩的透气性 封闭能力 

分 类 号：TD712.2[矿业工程—矿井通风与安全]