Analysis of gas-pressure measurements in coal seams in connection with the manifestation of permeability around holes and mine workings

1998 ◽  
Vol 34 (2) ◽  
pp. 113-118 ◽  
Author(s):  
S. V. Kuznetsov ◽  
V. A. Trofimov
Keyword(s):  
Gas Pressure ◽  
Pressure Measurements ◽  
Coal Seams ◽  
Mine Workings

scholarly journals Reproducibility of C. I. P.-compatible dynamic pressure measurements

2020 ◽  
Vol 87 (10) ◽  
pp. 630-636
Author(s):  
Oliver Slanina ◽  
Susanne Quabis ◽  
Robert Wynands
Keyword(s):  
Dynamic Pressure ◽  
Storage Conditions ◽  
Dynamic Measurement ◽  
Gas Pressure ◽  
Pressure Measurements ◽  
Small Arms ◽  
Minimum Pressure ◽  
Maximum Value ◽  
Preliminary Study ◽  
Dynamic Pressure Measurements

AbstractTo ensure the safety of users like hunters and sports shooters, the dynamic pressure inside an ammunition cartridge must not exceed a maximum value. We have investigated the reproducibility of the dynamic measurement of the gas pressure inside civilian ammunition cartridges during firing, when following the rules formulated by the Permanent International Commission for the Proof of Small Arms (C. I. P.). We find an in-house spread of 0.8 % between maximum and minimum pressure for runs with the same barrel and of 1.8 % among a set of three barrels. This sets a baseline for the expected agreement in measurement comparisons between different laboratories. Furthermore, a difference of more than 3 % is found in a preliminary study of the influence of ammunition storage conditions.

scholarly journals Substantiation of Safe Conditions During Undermining of Hydraulic Waste Disposal

2018 ◽  
Vol 41 ◽  
pp. 01007
Author(s):  
Yuriy Kutepov ◽  
Aleksandr Mironov ◽  
Maksim Sablin ◽  
Elena Borger
Keyword(s):  
Rock Mass ◽  
Waste Disposal ◽  
Coal Mine ◽  
Water Body ◽  
Water Inflow ◽  
Open Pit ◽  
Coal Seams ◽  
Geological Conditions ◽  
Mine Workings ◽  
Mine Dump

This article considers mining and geological conditions of the site “Blagodatny” of the mine named after A.D. Ruban located underneaththe old open pit coal mine and the hydraulic-mine dump. The potentially dangerous zones in the undermined rock mass have been identified based onthe conditions of formation of water inflow into mine workings. Safe depthof coal seams mining has been calculated depending on the type of water body – the hydraulic-mine dump.

scholarly journals The results of monitoring of hydroimpulsive disintegration of outburst-prone coal seams using ZUA-98 system

2020 ◽  
Vol 168 ◽  
pp. 00068
Author(s):  
Vasyl Zberovskyi ◽  
Kostiantyn Sofiiskyi ◽  
Rishard Stasevych ◽  
Artem Pazynych ◽  
Jan Pinka ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Rock Mass ◽  
Coal Seam ◽  
High Frequency ◽  
Strain State ◽  
Monitoring And Evaluation ◽  
Dynamic State ◽  
Coal Seams ◽  
Gas Dynamic ◽  
Mine Workings

The paper represents the results of monitoring and evaluation of the efficiency of hydroimpulsive disintegration of outburst-prone coal seams in the stopes of development mine workings using a system of sound detecting facilities. Methods of acoustic emission control have been considered as well as the monitoring tasks to evaluate rock mass conditions before the procedure and after it inclusive of the results of sound accompaniment of hydraulic disintegration of the coal seam. It has been determined that the higher concentration of stresses within the rock mass is, the more efficient action of high frequency self-oscillations of cavitation transmitter is on both the fissuring and changes in gas-dynamic state of the coal seam. It has been recommended to apply a mode of impulsive fluid pumping under the conditions where coal seam is in the stress-strain state.

scholarly journals Justification of the Disk Tool Application for Working Bodies of Mining Machines

2019 ◽  
Vol 297 ◽  
pp. 03007
Author(s):  
Alexey Khoreshok ◽  
Leonid Mametyev ◽  
Valery Nesterov ◽  
Aleksandre Tsekhin ◽  
Andrey Borisov
Keyword(s):  
Solid Rock ◽  
Energy Intensity ◽  
Statistical Data ◽  
Destruction Process ◽  
Coal Seams ◽  
Mechanical Method ◽  
Disk Tool ◽  
Dust Level ◽  
Mine Workings ◽  
Working Bodies

The dynamics analysis of coal mining and mine workings in Russia and Kuzbass was made with an assessment of operational productivity and load on fully-mechanized long-walls (FMLW). The article presents statistical data on the average number of FMLW and average monthly productivity of a miner. Disadvantages in the cutters work of working bodies of shearers and tunnelling machines during the mining of seams with a solid rock inclusions were determined. The usage of a disk tool instead of a cutter of working bodies of mining machines at operation at the mining enterprises of Kuzbass was offered in the article. The article recommends to expand the area of application of the mechanical method of coal seams and rocks destruction with a breaking down point of uniaxial compression up to 100 MPa by using a biconic disk tool of working bodies of extracting machines. Shearers’ tractive characteristics during mining of coal seams with rock inclusions, allowing to determine the energy intensity of destruction process by a disk tool were obtained. The options of design implementation of unified attachment points of a disc tool of working bodies of mining machines are presented. It was established that the main advantages of a disk tool over the cutter are the implementation of reversible modes of operation of working bodies, hardening and reducing dust level in face space.

Gas Pressure Measurements Inside an Aerated Hopper

2004 ◽  
Vol 82 (1) ◽  
pp. 72-84 ◽  
Author(s):  
G. Donsì ◽  
G. Ferrari ◽  
M. Poletto ◽  
P. Russo
Keyword(s):  
Gas Pressure ◽  
Pressure Measurements

1213 Gas Pressure Measurements Inside Hopper Discharging Adhesion-cohesive Powder

2006 ◽  
Vol 2006.44 (0) ◽  
pp. 461-462
Author(s):  
Hideo Kawahara ◽  
Saori Nakamura ◽  
Kouichirou Ogata
Keyword(s):  
Gas Pressure ◽  
Pressure Measurements ◽  
Cohesive Powder

Gas pressure in coal seams

1966 ◽  
Vol 2 (5) ◽  
pp. 465-471 ◽  
Author(s):  
S. V. Kuznetsov
Keyword(s):  
Gas Pressure ◽  
Coal Seams

scholarly journals Monitoring of large open cut rounds by VOD, PPV and gas pressure measurements

Fragblast ◽  
1997 ◽  
Vol 1 (1) ◽  
pp. 3-26 ◽  
Author(s):  
F. Ouchterlony ◽  
S. Nie ◽  
U. Nyberg ◽  
J. Deng
Keyword(s):  
Gas Pressure ◽  
Pressure Measurements

System for gas pressure measurements in the arc plasma environment

Measurement ◽  
2016 ◽  
Vol 90 ◽  
pp. 199-207 ◽  
Author(s):  
D. Smugala ◽  
P. Oramus ◽  
P. Krysztofiak ◽  
M. Bonk ◽  
P. Piekarski ◽  
...  
Keyword(s):  
Gas Pressure ◽  
Pressure Measurements ◽  
Arc Plasma ◽  
Plasma Environment
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