Prospects for the bioindication methods implementation in the environmental management system of industrial enterprises

Development and testing of an algorithm for calculating the load on support of mine workings

“…The range of yielding property change is looking at the fact that mine working is located in the zone of the stope works influence, what dramatically changes the rock mass structure [37], [38]. Again, the measurements of the rock contour displacements of the drift represents their maximum values in the period after the stope face passage at the boundary with the area of rock pressure stabilization [39], [42]. Generally, as a rule, a distance of 40-60 m behind the longwall face is adopted, however sometimes this distance is higher up to 160-200 m [38].…”

“…According to the variable yielding property value of the fastening system, the value of the load q 1 should be determined for each its value. In a two-parameter formulation of an optimization scheme, the load q 1 is represented as the sum of vertical stresses σ y , distributed along the mine working contour per unit length [39]- [43], [44]. The task of determining the curve σ y along the drift contour is easily performed after conducting a computational experiment with a hold fixed value of the yielding property of fastening system as shown in Figure 3.…”

“…This allows for the monitoring of the influence of geomechanical factors on changing the function q 1 (u). An analysis of the fastening schemes and maintenance schemes for reusable extraction mine workings emphasises the value of the approach [31], [39]. Therefore, it is impractical to monitor the influence of each of the used schemes due to the following reasons:…”

Generalization of trends in the influence of geomechanics factors on the choice of operation modes for the fastening system in the preparatory mine workings

“…A diagram is constructed in Figure 1 of the loading factors development in the fastening system when its yielding property value is changed for two fixed environments: favourable (the index "f") and complex (the index "c"). The change in mining and geological environments is conditioned by various geomechanics factors: transformations of the coal-bearing massif structure (Bondarenko, Kovalevs'ka, & Fomychov, 2012), the replacements of separate lithotypes (Symanovych, Demydov, & Chervatuk, 2013), areas of increased inflow of water (Sadovenko & Tymoshchuk, 2013;Ivšinović, 2017;Menshov & Sukhorada, 2017) or intense fracturing (Bondarenko, Simanovich, Kovalevska, Fomichov, & Serdiuk, 2007;Kovalevska, Symanovych, & Fomychov, 2013;Masny, Prusek, & Mutke, 2017;Lozynskyi, Saik, Petlovanyi, Sai, & Malanchuk, 2018); depending on their combination (Madziarz, 2015), there is a different degree of worsening in mining and geological environments. Several fixed positions have been considered (numbered in I -IV) of the process of the load formation on the fastening system (Fig.…”

State analysis of overworked and underworked parting between contiguous seams and during their simultaneous top-down mining

“…Нагрузка от сдвижения указанной толщи массива превышает несущую способность сек-ций крепи механизированного комплекса и, тем более, любой крепежной системы выемочных выработок (Kovalevs'ka, Vivcharenko & Snigur, 2013;Symanovych, Demydov & Chervatuk, 2013;Khalymendyk & Baryshnikov, 2016) то есть, возникает чрезвычайно опасная аварийная ситуация, исследование которой выполнено на примере отработки в нисходящем порядке двух смежных пластов н с 8 и 9 с на шахте "Западно-Донбасская" ПАО "ДТЭК Павлоградуголь".…”