在野外钻孔施工过程中,一般需要通过当地地层中典型性的标志层来判定煤层的位置或煤系地层的层位。然而,当标志层不存在或者被断失或者由于断裂发育而无法提取时,就给判定工作带来极大的困难。利用非典型性标志层来进行判定工作,可以减少工作量,达到提高工作效率、节约成本的目的。 In the field of borehole construction, it is generally necessary to determine the location of the coal seam or the strata of the coal measures through the typical marker layer in the local strata. However, when the mark layer does not exist or is missing or can not be extracted due to the development of the fracture, it brings great difficulties to the judgment work. The use of atypical markers to determine the work, you can reduce the workload, to improve work efficiency, cost savings purposes.