求翻译：沉积环境对煤层结构影响也很复杂，基底是均衡性对煤层的平均厚度的稳定性有很大的影响，聚煤凹陷的说明煤层在形成过程中聚煤凹陷的基底沉降表现为不均衡性，地壳不均衡沉降引起的煤厚变化会使煤层出现分叉、变薄、尖灭的现象。横向上，产生分叉、尖灭等现象。纵向上可能会出现深度大而横截面小等现象。是什么意思？

The sedimentary environment impact on the coal structure is very complex, the basement is the balance of the average thickness of the coal seam has a great influence on the stability of coal accumulation that depression seam coal accumulation during the formation of hollow base settlement imbalance

depositional environments of coal structure is very complex, balanced base of coal is the average thickness of the stability of a very large impact craters, and the seam in the process of formation in coal pits in the floor is uneven settlement of Earth's crust, resulting from uneven settlement of c

The environment of deposition very is also complex to the coal bed structure influence, the basis is the equalization has the very tremendous influence to the coal bed average thickness stability, gathers the coal hollow explanation coal bed to gather the coal hollow basis subsidence performance in

Sedimentary environment effects on the structure of coal seam is also very complex, is balanced on the average thickness of the coal seam of the basement has a large influence on the stability of, description of the coal-accumulating SAG in the formation of coal seam in coal substrate deposition per