求翻译：由于泥炭层堆积过程中，遭受沼泽边缘发育的溪流冲蚀，使煤层中间夹河流沉积物，造成厚度变化。经常遇到煤层中的岩体与煤层镶嵌咬合。且局部夹石层数增多，结构复杂，岩石性质为砂岩或砂质泥岩，夹矸外形为串珠状或透镜状，煤层厚度相对变薄．在平面表现为宽度不大的弯曲变形带。煤层厚度变化是影响煤矿开采的主要因素之一，严重制约采掘工作的正常进行。造成采掘比例失调，生产成本提高。工作效率降低及井田煤炭储量减少等。为了准确计算煤炭储是什么意思？

Peat layer accumulation process, subjected to stream erosion of the marsh edge development, so that the seam sandwiched between the river sediments, resulting in thickness change. Often encountered in the coal seam in the rock and coal seam mosaic bite. And local stone layers increased complexity of