Fracture seepage experimental instrument for coal mine

Abstract

The invention relates to the technical field of coal mining in particular to a fracture seepage experimental instrument for coal mine. According to the invention, simultaneous experiments of a plurality of coal samples can be realized; the reliability and the comparability of an experiment are effectively improved; comparison is faciliated, a pressure equalizing film is arranged between the innerside of the lower end of an experiment cylinder assembly and the lower end surface of a coal sample; the accuracy of a seepage experiment can be effectively improved; seepage liquid at each position is ensured to uniformly flow in; meanwhile, a mode of utilizing pressure to seep from bottom to top is adopted, and the seepage effect can be effectively simulated; according to the invention, the sealing snap ring assembly is arranged; the sealing performance between the coal sample and the experiment cylinder can be effectively improved, the influence on seepage is reduced, and a heating assemblycan be further arranged, so that the sealing ring and the coal sample are bonded together through hot pressing by heating the sealing ring, the sealing capacity is improved, and the influence on a seepage experiment by the edge of the coal sample is reduced.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a fissure seepage experimental instrument for coal mines. Background technique [0002] In order to collect qualified coal mines, usually before large-scale mining, a sample simulation experiment will be carried out on the coal mines in the designated area to obtain the integrity of the coal seam in the coal mine, which is convenient for the corresponding design of the coal mine mining, and it is also beneficial to the later stage Use the corresponding plan. Among them, seepage experiments are carried out on the cracks of coal samples in order to study their air permeability, water permeability and other issues, which can provide a good basis for gas drainage and so on. [0003] There are certain disadvantages in the use of existing coal mine experimental instruments. In the existing coal mine simulation experiments, the coal sample is generally placed in the test box, and t...

AI Technical Summary

Problems solved by technology

With the current structure, the coal sample is not deformable during the experiment, so it is difficult to achieve a seal between it and the test box, resulting in seepage fluid passing through the connection between the coal sample and the test box, resulting in excessive error in the seepage experiment. Affects the experimental results. Even if a simple gasket is installed at present, due to the roughness of the coal sample surface, it is difficult to seal well between the gasket and the coal sample, which still affects the accuracy of the experiment.

Images