Analisys of mud inrush water sources into underground working of the Sokolovskoe ore deposit

Authors: Efremov E.Yu.

There is a serious threat of groundwater inrush from overlying sedimentary layers for underground mining. When ore is extracted using block caving method, the area of overburden collapse over ore zone disrupts the natural structure of high hydraulic-conductivity and low hydraulic-conductivity layers. This process creates conditions for the accumulation and transfer of groundwater to mine workings, which lead to accidents, up to disastrous proportions. The research aim is to determine the spatio-temporal distribution of mud inrushes, and to identify groundwater supply sources of inrushes to reduce the geotechnical risks of underground mining in Sokolovskaya mine. Research methods include localization, classification, and analysis of monitoring data, comparison of mud inrushes distribution with geostatistical parameters of the main aquifers.The majority of large-scale accidents caused by mud inrushes are confined to the central and northern area of caved rock zone. The most risky stage of the ore body extraction is the initial block at the lower extraction level. The sources of water supply for the majority of the mud inrushes are high water level areas of the Cretaceous aquifer to the north and west of the mine. Rational targeted drainage aimed at draining the identified areas of the aquifer is the best way to reduce the risk of accidents.

Keywords: funnel of caved zone, caved zone, water inflow, mud inrush, clay minerals, flooding, aquifer.
For citation:

Analisys of mud inrush water sources into underground working of the Sokolovskoe ore deposit. MIAB. Mining Inf. Anal. Bull. 2020;(3-1):56-67. [In Russ]. DOI: 10.25018/0236-1493-2020-31-0-56-67.

Acknowledgements:

the Work was performed within the framework of the State task # 07500581-19-00. Topic No 0405-2019-007. Topic 3 (2019-2021).

Issue number: 3
Year: 2020
Page number: 56-67
ISBN: 0236-1493
UDK: 622.834; 622.84
DOI: 10.25018/0236-1493-2020-31-0-56-67
Article receipt date: 21.11.2019
Date of review receipt: 30.12.2020
Date of the editorial board′s decision on the article′s publishing: 20.03.2020
About authors:

Efremov E.Yu., researcher Institute of Mining of the Ural Branch of the Russian Academy of Sciences, 620075, Yekaterinburg, Mamin-Sibiryak st., 58, e-mail: Efremov-eu@mail.ru.

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