Authors: A.A. Isachenko, O.A. Petrova, T.V. Petrova

Title of the article: Substantiation of technology parameters for developing and mining highly contiguous coal seams

Year: 2017, Issue: 6, Pages: 127-132

Branch of knowledge: Earth sciences

Index UDK: 622.831.232:004.942

DOI: 10.26730/1999-4125-2017-6-135-140

Abstract: The article presents the results of a study of the impact of the width of the coal pillar and thickness of rock strata between highly contiguous coal seams on the displacement of contour of in-seam workings at multi-roadway development and mining of extraction panels in coal mines. The mine studies revealed qualitative dependencies of the displacements of the contour of development workings when there were changes in the distance from the stoping face to the observation stations and in the thickness of rocks between highly contiguous seams of Erunakovskoe deposit in Kuzbass. It is established that intensive swelling of floor rocks of development workings occurs at the distance from the stope equal to the depth of the development. The dependence of the values of swelling of floor rocks of development workings of the upper seam decreases sharply with the thickness of rocks between seams exceeding three times the extracted seam thickness. It is established that in the zones of disjunctive faults as a result of the strength reduction and intensification of the deformation of rocks the ratio of the actual cross-sectional area of the working to the design area decreases almost twice in comparison with the corresponding ratio of cross-sectional areas beyond the zone of geological faults. The criterion of rib coal pillar stability is the ratio of the width of the zone of elastic coal deformation in a pillar to its design width in excess of 0.4. The area of the zone of destruction of coal and rocks in the vicinity of the development working decreases in nonlinear inversely proportional relation with increasing thickness of rocks between highly contiguous coal seams.

Key words: coal pillars contiguous seams development workings rock deformation floor rock swelling

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