RESEARCH STUDYES ON MINING ACTIVITY IMPACT ON THE AREA FOCSANEI SCURTESTI, CASE STUDY VADU PASII, BUZAU COUNTY

2013 ◽  
Author(s):  
Cimpeanu Sorin
Keyword(s):  
Mining Activity

scholarly journals Mining disposal erosion evaluation: A case study

2021 ◽  
Vol 882 (1) ◽  
pp. 012050
Author(s):  
Y S Novianti ◽  
U Saismana ◽  
Y Yuhanes ◽  
H N Fikri
Keyword(s):  
Land Cover ◽  
Soil Loss ◽  
Flow Distribution ◽  
Mining Activity ◽  
Distribution Model ◽  
Mining Activities ◽  
The Third ◽  
Soil Loss Equation ◽  
Reclamation Process

Abstract Mining disposal (dumping overburden) area is the primary consideration in the reclamation process in mining activities, especially in mining activity. The current study aims to determine the rate of erosion and the level of erosion hazard at mine disposal using water flow distribution. This research was conducted in a coal mine in Kalimantan. Based on the structure of the runoff flow distribution model, this study divides disposal into three land units. The universal soil loss equation in three land units was obtained for erosion values. The value for each land unit is 76 tons/ha/year, 134 tons/ha/year, and 50 tons/ha/year. These three land units are under the level of moderate and light danger of erosion. Afterward, three recommendations were made to the three land units. The first recommendation is the condition of land cover does not change, and conservation changes; the second recommendation is with changes in land cover, but conservation does not change; and the third recommendation is with conditions of land cover and conservation change. The second recommendation shows the best results compared to the other recommendations.

scholarly journals Detailed Recognition of Seismogenic Structures Activated during Underground Coal Mining: A Case Study from Bobrek Mine, Poland

Energies ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4622
Author(s):  
Andrzej Leśniak ◽  
Elżbieta Śledź ◽  
Katarzyna Mirek
Keyword(s):  
Linear Structure ◽  
Seismic Energy ◽  
Mining Activity ◽  
Hard Coal ◽  
Tectonic Structures ◽  
Vertical Orientation ◽  
Ordered Structures ◽  
Seismogenic Structures ◽  
Local Tectonics

In rock mass disturbed by mining activity, distortions in the stress balance may lead to seismic energy being emitted in reactivated seismogenic structures. One way of increasing the imaging resolution of these seismically active structures is through relocation, which itself can be achieved using the cloud collapsing method. This method partially eliminates perturbations in the location of seismic energy sources concerning the actual positions of these sources. It enables events to be grouped into spatially ordered structures that may correspond to actual tectonic structures, such as fractures, fissures, or faults. We present the results of applying the collapsing method in mining seismology using a cloud of located events recorded during mining activity at one of the coalfaces in the Bobrek hard coal mine. The relocation procedure was applied to all the foci of events recorded during mining activity on face 3/503 between April 2009 and July 2010. In the relocated point cloud, two types of the linear structure responsible for generating events are automatically distinguished using the HDBSCAN algorithm: structures directly related to mining activity and structures associated with local tectonics. The location of the separated structures of the first type corresponds to the range of coalface 3/503 and the shafts delimiting earlier mined seams 507 and 509 located below. The isolated structures of the second type, with almost vertical orientation, are associated with existing zones of discontinuity that become seismically active as a result of mining activity. The identified structures lie near the biggest events recorded, which is evidence that these structures may correspond to real discontinuity zones.

Sign in / Sign up

Export Citation Format

Share Document