摘要
顺煤层断层是指顺煤层发育的断面与煤层层面的交角较小或近于平行的断层。它的主要识别标志是断层面、构造煤和煤层厚度的强烈变化。顺煤层断层可独立存在,也可与其它地质构造相互转换,相伴出现。顺煤层断层具有特殊的选层性,这一特征与煤体较低的力学强度、煤层瓦斯压力及形变期顺煤层的剪切作用有关。顺煤层断层在煤田中分布广泛,它所产生的构造煤是瓦斯高聚集区,亦是瓦斯突出的危险区,其研究意义重大。
Coal-seam faults refer to those where their planes are developed along thecoal seams and are at a low angle to ot nearly parallel to the planes of the coalseams. Their significant diagnostic criteria are fault plane, tectonoclastic coal andsharp variation in coal seam thickness. Coal-seam faults can either exist indepen-dently or co-exist with other geological structures; they can convert into eachother. Coal-seam faults ofter develop in such specific coal seams, as rather low inmechanic strength, present of gas pressure and/or with deformation shearing.Coal seam faults are widespread in coal fields especially in those where coalmeasures are highly deformed. It is important to study the structural feature ofthese faults because the coal-seam fault zone is high in gas content, a possible ora dangerous zone for coal and gas outburst. In this respect, coal-seam faults appearto control the spatial distribution of the dangerous zone of coal and gas outburst.Therefore, the dangerous zone of gas outburst could be predicted through thestudy of the coal-seam fault zone.
出处
《地质论评》
CAS
CSCD
北大核心
1993年第6期522-528,共7页
Geological Review
基金
国家自然科学基金(编号:49102033)
关键词
顺煤层断层
煤体强度
瓦斯压力
coal-seam fault
tectonoclastic coal
coal and gas outburst
