It is essential to understand the geological environment of coal strata in relation to cutter bit usage.
Geological structures refer to the deformation and displacement phenomena of rock layers (or ore bodies) caused by geological processes such as crustal movement, primarily including folds, faults, and fractures.
Geological structures control the spatial distribution and morphology of ore bodies, thus significantly influencing safe mining operations. Let’s discuss the relationship between folds and mining operations:
1.Pre-mineralization folds play a controlling role in the formation of ore deposits,
the distribution and spatial morphology of ore bodies, and their occurrence. Therefore, the shape of folds determines the occurrence and occurrence conditions of ore bodies, directly impacting the exploration and selection of mining methods for ore deposits.
2.Post-mineralization folds often complicate the shape of ore bodies,
making exploration and mining operations more complex. Folds can elevate the position of the same ore layer or repeatedly expose it on the surface, making it easier to discover and mine. When ore layers are affected by folding, it can result in relatively concentrated distribution of mineral reserves, generally with increased thickness in the syncline or core, reducing the overall length of tunnels and facilitating mining.
3.In the crest of an anticline, the overburden pressure is generally lower,
which is generally favorable for mining operations. However, the top of the crest is prone to rock fractures and fragmentation, potentially leading to increased water influx and accidents such as roof collapse and water seepage during production. In the limb of an anticline, the overburden pressure is generally higher, making it more prone to roof slab accidents.
4.Folds can cause changes in the occurrence of ore layers and facilitate gravity transportation,
which is advantageous for internal ore transportation.
The service life and wear degree of cutter bits vary in different rock layers. Therefore, understanding the geological conditions of coal strata is crucial for their effective usage.
