(PDF) Practice of Outburst Prevention Technology for
Vertical Shaft Uncovering Coal Stress Distribution Simulation of High Gas Mine and Outburst Prevention Measures Research[J]. Safety in Coal Mines, 2017, 48(5): 169-172.
Discussion on the Main Control Effect of …
This study investigates the differences between coal and gas outbursts under various geological structural conditions and the impact of the geological structure on outburst distribution. This reveals the controlling …
Prediction and prevention of sandstone-gas outbursts in coal mines …
A sandstone-gas outburst, which is one of the most dangerous hazards occurred in underground engineering, is exacerbated by increased depths and more difficult geological environments. On March 9, 1995, an outburst ejected over 2000 tonnes of oil-bearing sandstone with 900,000 m 3 of gas at the 554 m depth in the air shaft of …
Study of the solid–gas–stress coupling model and its …
Metrics. Abstract. Coal mines may change from non-outburst mines into coal and gas outburst mines with increasing mining depth. Therefore, scientific and …
Coal and Gas Outburst Prevention Technology and …
Regional comprehensive outburst-prevention measures include four integrated parts, prediction of the regional outburst danger, regional outburst prevention measures, …
Accidents analysis and prevention of coal and gas outburst
Among the errors, the lack of strict enforcement of outburst prevention measures, illegal command, and the illegal operation of miners are the main unsafe acts. ... it may cause an explosion (Lama and Bodziony, 1998; Nilufer and Mustafa, 2019). In addition to coal mines, coal and gas outburst accidents often occur during the …
Prevention and Control of Coal and Gas Outburst by …
The regionalized pressure relief, permeability enhancement, and outburst prevention of "three high and one low" coal seams with high gas, high ground stress, high outburst risk, and low permeability have become important problems to be solved urgently in realizing the sustainable development of coal mines. In this study, a combination of …
Gas comprehensive prevention and control technology …
practice in outburst mine GAO Hong1 ... First regional outburst prevention measures in East Wing of panel 1 The 3108 working face of panel of Xiaoxi Coal Industry Co., Ltd. is the first ...
CN103195473A
The invention discloses an analysis method for the effect of an outburst prevention measure of a mine. The analysis method comprises the following steps: firstly, measuring the opening parameters of a measure drill hole, wherein the opening parameters include opening height, azimuth angle or declination angle, inclination angle and length of the …
Accidents analysis and prevention of coal and gas outburst
(4) An overall 75.82 % of accidents occurred in the driving face, and 81.08 % of accidents occurred in coal and gas outburst mines. (5) Blasting, drilling, driving, and coal falling are the main ...
(PDF) Problems in the Classification of Mine Gas Grades and
Therefore, scientific and rapid prediction of the coal seam outburst risk and effective prevention and control measures could ensure coal mine safety and production.
Research On Comprehensive Early-Warning Technology Of Coal And Gas Outburst
Taking various outburst prevention measures and management is approach to identify, eliminate, control and restraint the first class danger source. Technical and management measure deficiencies lead to release of outburst energy belong to the in the second class danger source. ... At specific mine, the establishing need combine with the …
Comprehensive Gas Prevention and Control Technique for Mining …
Coal and gas outbursts are a phenomenon whereby broken coal and gas suddenly erupt from the coal body into the mining space under pressure. The Diandong mining area is a group of close-range outburst coal seams in which the gas content is up to 20 m 3 /t and gas pressure can reach 3 MPa. Research has been conducted on …
A new method for coal and gas outburst prediction and prevention based
However, with the increase of mining depths in recent years, outburst disaster prevention is being taken much more seriously as part of coal-mine production and management [11], [12], [13]. Seven outburst accidents occurred in 2019, resulting in 39 deaths, which is nearly double that of 2017.
Research progress in coal and gas co-mining modes in China
Protective seam mining is a simple, economical, and effective method for using coal and gas co-mining technology measures (shown in Figure 3). 2 Gaving zone, fractured zone, and bending zone were formed above the goaf. The advantages of protective mining measures include a uniform outburst prevention effect, high safety, …
(PDF) Gas comprehensive prevention and control
Gas drainage technology and practice of large mining height working face in high outburst mine [J]. China safety production science and technology, 2019, 15 (06): 99-104
Energies | Free Full-Text | Study of Key Technology of Gob …
To ensure the safe and efficient production of the mine, it is necessary to take corresponding gas outburst prevention measures during the excavation and mining of the 39114 working face. Therefore, the method of mining the liberated seam was adopted as the regional outburst prevention measure during the roadway excavation of the …
The current situation and prevention and control
The regional prevention measures for controlling coal and gas outburst mainly include mining the protective coal seam and pre-pumping the coal seam. ... the proportion of coal and gas outburst mines is 29.79%, and the proportion of rock burst mines is 53.2%; both of them are significantly higher than the national average. The …
Discussion on the Main Control Effect of Geological …
Coal and gas outbursts are great natural disasters in underground coal mines, seriously threatening the lives of miners and coal mine safety. The study of the relationship between coal and gas outbursts and geological structures has always been an important component of gas geological work, and it also serves as a foundation for coal mines to develop gas …
How efficient coal mine methane control can benefit carbon …
High gas and outburst mines in China account for more than 40% of all coal mines, resulting in China being the country with the most severe coal and gas outburst disasters in the world ... Local prevention outburst measures, constructed under limited conditions: Cross-measure borehole extraction: Fushun, Yangquan (1957)
Coal and Gas Outburst Prevention Technology and …
The maximum gas pressure among the outburst mines is 2.0~7.83 MPa, but the gas pressure in Chonging Tianfu diggings used to be as high as 13.6MPa. The average gas content of outburst coal seam is 14.6 m3/t, while the maximum reaches 38.49 m3/t.
An analysis of gas accidents in Chinese coal mines, 2009 – …
The possible harm of coal and gas outburst not understood; insufficient understanding of dangers of illegal production, illegal drilling, illegal mining, and importance of operation procedures; the importance of geological assessment underestimated; the importance of taking regional outburst prevention measures not understood; risk of …
Research on Temperature Variation during Coal and Gas Outbursts …
Coal and gas outbursts (hereinafter referred to as outbursts) in coal mines are complex dynamic phenomena characterized by a sudden and violent ejection of large amounts of coal and gas from the working face into a limited working space within a short time [1,2,3,4].The pulverized coal and gas flow induced by an outburst generates an …
A comprehensive risk assessment method for coal and gas outburst …
The triggering factors of coal and gas outburst disasters are complex and influenced by the coupling of gas, in situ stress, and mechanical properties of coal (Wang et al., 2022, Xue et al., 2020; Zhou et al., 2020a).At the early stage of mining, the basic parameters that are easy to test and directly related to the outburst risk are usually …
Comprehensive Gas Prevention and Control Technique
A comprehensive gas prevention and control technique for mining the first seam in a short-distance outburst coal seam group has been formed, including an early warning gas prevention and control technique for ultranear interlayer tunneling, a cross …
The current situation and prevention and control
The regional prevention measures for controlling coal and gas outburst mainly include mining the protective coal seam and pre-pumping the coal seam gas; local measures to prevent outbursts mainly include advance boreholes, loose blasting, hydraulic cutting, hydraulic flushing in hole, hydrofracture and coal seam infusion (Yang et al., 2016).
CN103195473B
The invention discloses an analysis method for the effect of an outburst prevention measure of a mine. The analysis method comprises the following steps: firstly, measuring the opening parameters of a measure drill hole, wherein the opening parameters include opening height, azimuth angle or declination angle, inclination angle and length of the …
(PDF) Comprehensive prevention and control of coal and gas outburst …
outburst prevention measure of the mine is pre-draining coa l seam gas. (1) Layout of drilling holes for driving face . According to the development layout of the second w ell in Liziya South, ...
Coal and gas outburst accidents prevention measures.
To avoid an outburst in the process of rock cross-cut coal uncovering, it is necessary to measure the outburst risk index accurately and take appropriate preventive measures (Ma et al. 2020b; Fu ...
Technical Parameters of Hydraulic Punching in a Typical Coal …
To prevent their occurrence, the Makiyivka coal mine safety institute proposed outburst prevention measures of unloading grooves around the roadway from 1968 to 1972 (AЛcйниκοB et al. 1981). The Makiyivka coal mine safety institute also implemented outburst prevention measures of hydraulic testing, the effect of hydraulic …