Conceptually, the task of surveying measurements is simple, however, its practical solution, provided that the necessary accuracy is ensured, in a number of cases becomes complex and requires the use of special techniques. This task becomes especially difficult in the conditions of deposits of non-metamorphosed platform-type coals, characterized by a complex structure of seams, variability in thickness, ash content and volumetric weight, and intense weathering of coal during storage in piles. In 1944, we carried out work to study the issue of surveyor measurements at the Cheremkhovo field (Irkutsk basin), which is a field of this type. The results obtained, which we want to share in this article, can be successfully used in a number of other fields. Since during surveying measurements under the conditions under consideration the most difficult thing is to accurately determine the volumetric weight of coal, we will focus on the results of our work on this issue.
