Parameters of Antifiltering Screens, which are around Underground Isolating Structures

Veniamin Khyamyalyainen,Alexandr Mayorov,Eugeny Nurgaliev,M Tyulenev,Y Tan,A Abay,S Anyona,J Janocko,S Zhironkin,D Nuray,M Cehlár,S Vöth,A Khoreshok

doi:10.1051/e3sconf/20184101008

Veniamin Khyamyalyainen, Alexandr Mayorov + Show 11 more

Open Access

https://doi.org/10.1051/e3sconf/20184101008

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Abstract

This article shows results of researches for the definition of rational parameters of technologies for antifiltering screens building aroundnon-hack isolating monolithic bridges with attention to experience of excavations isolation in Kuzbass coal mines. There were evaluated theinfluence of parameters of antifiltering screen at liquids and gases relocating through rock massif. It has been shown a mathematical model of waterfiltering and liquid-solid suspensions which are based on cement mixtures through the border rock massif with antifiltering plugging screen.

Highlights

World trends of energy using growth affect at coal industry of country where systematic growth takes place: Kuzbass produced more than 227 million tons of coal in 2016, more than 240 million tons in 2017
The value of the inclination angle of the injection wells toward working face contour, which depends of plugging grout coverage area, injection mode and physical properties of rock massif, is important
The developed technology of subsequent hardening of destroyed border massif around non-hack bridges includes a set of solutions for creating of radial harp from injection wells, which are inclined above bridge at the angle to contour of seam excavation, which is defined from correlation of bridge thickness, size of destroyed zone and from radius of diffusion of plugging grout

Summary

Introduction

World trends of energy using growth affect at coal industry of country where systematic growth takes place: Kuzbass produced more than 227 million tons of coal in 2016, more than 240 million tons in 2017. Wherein, considering Kuzbass example, significant quantity of non-hack bridges has been installed and operated without preliminary / following hardening and consolidation of the destroyed border area, which leads to significant relocates of gas through the isolating structures, to the absence of bearing structural bounds and as result bases of industrial safety can be broken. The necessity of complex rational approach to building and safety maintenance of mines, which is supposed to be constructed with consolidating isolating systems “bridge - plugging screen” which are structurally integrated into the destroyed border space is obvious. To improve isolation technologies of mine excavations by non-hack bridges with consolidated border space, the actual point is a foundation of rational parameters of injection cementation and development of the theory of fluid filtering within the boundaries of the plugging screen

Injection methods of manipulating on the rock massif

Plugging screens geometric shape control around bridges

Filtering processes simulation

Experience of implementation

Conclusion