湖南省短陂桥矿区二叠纪煤炭分布赋存规律

DISTRIBUTION AND OCCURRENCE OF THE PERMIAN COAL IN DUANPIQIAO MINING AREA

短陂桥矿区位于湖南省邵阳市东部,构造主体以短陂桥含煤向斜和F9重力滑脱断裂构造系统所组成,构造复杂。含煤地层为龙潭组上段(P_2l^2),含煤4层,含可采煤层2层(1、3煤层)。其中1煤层厚0～2.36 m,平均0.89 m,全区大部分可采,为不稳定煤层,煤质为低灰,低挥发份,中高硫,特高热值,低磷、较低熔灰分,中粘结性,变质程度为瘦煤。3煤层厚0～4.6 m,平均1.24 m,全区可采,为较稳定煤层,煤质为低灰,低挥发份,中高硫,特高热值,低磷、较低熔灰分,中粘结性,变质程度为瘦煤。研究区内存在煤与瓦斯突出、煤尘爆炸及煤层自燃等危险性。工程地质条件复杂,水文地质条件简单,环境地质条件中等。研究区内资源储量4 490万t,其中1煤层资源量为2 003万t,3煤层资源量为2 487万t。

Duanpiqiao mining area is located in the east of Shaoyang city,Hunan province,where has a complicated structural system composed of Duanpiqiao coal-bearing syncline and F9 faults.The coal-bearing sequence is the upper member of Longtan formation(P2l2) with four coal beds,of which 2 can be mined(No.2 and No.3).The No.1 coal bed,0～2.36 m thick,0.89 m on average,uncontinuous,low ash,low volatile,medium to high sulfur,very high heat value,low phosphor,low melting ash,medium coking,and as lean coal in metamorphism,which can be mined in most area.The No.3 coal bed,0～4.6 m thick,1.24 m on average,continuous,low ash,low volatile,medium-high sulfur,very high heat value,low phosphor,low melting ash,medium coking,and as lean coal in metamorphism, which can be mined in whole area.In the mining area,some potential hazards such as coal and gas outburst,coal dust explosion and coal spontaneous combustion.A complicated engineering geology,a simple hydrogeology and a medium environmental geology.The resource is 44.9 million tons,20.03 mt in the No.1 coal bed,24.87 mt in the No.3.