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Modeling of the disjunctive geological fault influence on the exploitation wells stability during underground coal gasification

Dychkovskyi R. O., Lozynskyi V. H., Saik P. B., Petlovanyi M. V., Malanchuk Y. Z., Malanchuk Z. R.

Archives of Civil and Mechanical Engineering

2018

Vol. 18, no. 4

1183--1197

Results of computer modeling of stress-deformed state of rock massif with the use of software FLAC 5.00 in zones of geological fault influence with amplitude that does not exceed 3 m are presented in the article. According to the results of the modeling, the dependences of vertical stress change in handing wall and foot wall of geological fault with variable fault plane amplitudes and contour well deformation have been obtained. Using the interpolation data method, 3-D grid visualization of vertical stress in space is got. The analysis of modeling results on full movement vectors is also presented. Results of previously conducted analytical calculations are compared with received data. Conclusions regarding the implementation of the offered method are made on the basis of undertaken investigations. The obtained results with sufficient accuracy in practical application can be used to determine the location of underground gas generator wells. Also these investigations will give the opportunity to maintain the necessary exploitation wells crosscut. Besides, it will allow consume coal reserves in the faulting zones in order to obtain power and chemical generator gas, chemicals and heat.

Determination of the technological parameters of borehole underground coal gasification for thin coal seams

Falshtynskyi V.S., Dychkovskyi R.O., Lozynskyi V.G., Saik P.B.

Journal of Sustainable Mining

2013

Vol. 12, iss. 3

8--16

In this article the characteristics of the criteria of borehole underground coal gasification for thin coal seams are defined. The thermal and material balance calculations for coal seam gasification processes are also explained. The construction, method of in situ gasifier preparation, and the sequence of coal seam gasification for area No 1 (located in the field of Solenovsk coal deposits) are also described. The parameters of borehole underground coal gasification for the Solenovsk coal mine on the model of rock and coal massif are detailed too. The method of in situ gasifier preparation, and the sequence of coal seam gasification during a standard installation are also described in detail. Interpretations based on the conducted research and investigation are also presented.