Abstract
One of the possible ways of physic-chemical destruction (PCD) of coal was considered. It is established that condition of the realization of a principle possibility of spontaneous dispersion of coal is to reduce its surface energy by 40-60 J/m2. Laboratory experiments to study the PCD of coal in different liquids were conducted. According to the results, kinetic curves of swelling coal in them transition D-G stamps is presents. It was established that the most intensive physical and chemical destruction of the coal to a particle size from tenths to tens of millimeters occurs in solutions of methylamine and hydrochloric acid. The most severe swelling of the coal was noted in those environment as well. The intensity of swelling is not significantly associated with the characteristics of wetting. The influence of various effects on the PCD parameters of coal was studied by physical simulation. The total time the chemical destruction of coal on the treated area was calculated. It was proposed method PCD for coals occurring in the clay rocks of various stages of catagenesis.
Highlights
Physic-chemical influence methods on the coal seams and host rock with the aim of improving the safety and efficiency of mining operations was widely spread in the development of coal deposits [1]
The study and understanding of these mechanisms, and further their use as a control action with the use of different chemical solutions could make a significant contribution to the development of the coal industry and mining industry as a whole
As it is shown by experiments, the manifestation of the effect of physic-chemical destruction of coals by using aqueous solutions of a number of known surface-active substances is possible only for a very the prepared carbons, which have a degree of natural disturbance is so great that they cannot be considered solid
Summary
Physic-chemical influence methods on the coal seams and host rock with the aim of improving the safety and efficiency of mining operations was widely spread in the development of coal deposits [1]. The mechanisms of interaction of coals with these substances still were no insufficiently studied, which greatly hinders the search for new environments and the development of methods of physicchemical effects on rock mass array. The study and understanding of these mechanisms, and further their use as a control action (physical-chemical influence on the rock mass massif with the aim of strengthening and weakening or destruction) with the use of different chemical solutions could make a significant contribution to the development of the coal industry and mining industry as a whole.
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