Determination of rational location of sectional preparatory excavations at layer systems of development
- 1 — Research assistant G.V. Plekhanov Saint Petersburg Mining Institute
- 2 — Assistant professor G.V. Plekhanov Saint Petersburg Mining Institute
Abstract
The paper analyzes the results of mine observations on the condition of area preparatory workings during layer mining of thick gentle strata of Kuzbass. The conclusion is made about the necessity of additional justification of the location of area preparatory workings of the 2nd layer, providing the reduction of costs for their maintenance. The stress-strain state of the rock massif (STS) "perturbed" by the 1st layer mining was investigated. The nature and degree of influence of the 2nd layer overmining were established. The rational location of the 2nd layer preparatory mine workings was chosen for the sloping mining of layer III of the Tom-Usinsky region of Kuzbass. The economic effect from the implementation of the developed recommendations is calculated, which is obtained by reducing the cost of maintaining the operational condition of the area excavations.