安家岭井工矿二号井含煤岩系沉积环境

Anjialing Underground Coalmine No.2 Coal Measures Sedimentary Enviroment

11号煤层直接沉积在潮坪和潮坪砂坝的隆起基底上,9号煤层亦发育在三角洲前缘的隆起区,成煤时间长,煤层厚度大,井田东部煤层最厚,薄煤带位于研究区南东角。8号和10号煤层为9号煤层在沉积过程中的局部分叉,而且分叉指向砂体和海,故9号煤层为岛状成煤条件。4^(-1)号煤层沉积在冲积平原的陆相环境。

The coal No. 11 has directly deposited on tidal flat and tidal flat sandbar uplifted basement; coal No. 9 also developed on delta front uplifted area. Since long coal-forming duration has caused large coal thickness. Thickest coal seams have developed in minefield eastern part,thin coal belt situated in southeast corner of the study area. Coal No. 8 and No. 10 are all local splits of coal No. 9 during the sedimentation,while the bifurcation directing on sand body and sea,thus the coal No. 9 should be deposited on an island.Coal No. 4（-1） was deposited on an alluvial plain with terrestrial environment.