al seam gas and al mining

Environmental impact of coal mining and coal seam gas

21/07/2017· The extraction of coal and coal seam gas (CSG) will generate produced water that, if not adequately treated, will pollute surface and groundwater systems In Australia, the discharge of produced water from coal mining and related activities is regulated by the state environment agency through a pollution licence This licence sets the discharge limits for a range ofThe modern minefield – water approvals for mining (a) coal seam gas (CGS) projects; and (b) coal mining development, impacting on water resources are now considered a matter of national environmental significance ( MNES ), and those projects may also need to obtain approval under the Federal regimeal seam gas amp amp mining land rigs workshop

Study on generation, migration and accumulation of CO

2 天前· Wang, D P et al Distribution characteristic and migration mechanism of toxic gases in goafs during closedistance coal seam mining: A case22/06/2022· The most typical feature of CGO is that the coal–gas twophase flow is ejected from the coal seam to the coal mining space and moves along the coal mine roadway (Zhou et al, 2021c) On the one hand, gas is the participating medium for the twophase outburst flow; on the other hand, it provides drag force for the movement of pulverized coal (Zhou et al, 2020a )Influence of Different Coal Seam Gas Pressures and their

surat basin al seam gas mining

Permit ATP 854 in Queensland’s Surat Basin is located near the heart of the coal seam gas (CSG) to liquefied natural gas (LNG) gas supply precinctCoal mining in the Surat Basin There are a total of eight existing and proposed opencut coal mines in the Surat Basin targeting coal seams in the Walloon Coal Measures Four of those are operational mines – New Acland06/12/2021· Coal seam groups are widely distributed in mining areas of different regions in China, especially closely spaced coal seam groups (Wang et al 2013)Selecting a coal seam with the optimal reliability factor as the first mining seam is necessary to achieve safe and highefficiency mining due to the diversified conditions of coal seams during mining (Wang et alA method for selection rationality evaluation of the first

Information Guidelines Explanatory Note Department of

relation to coal seam gas and large coal mining developments are a matter of national environmental significance This is known as the ‘water trigger’ and means that coal seam gas and large coal mining developments require Australian Government assessment and approval if they are likely to have a significant impact on a water resource All groundwaterdependent06/05/2022· In addition, the optimized crossdrilling was proposed for an onsite gas drainage test, which solved the danger of coal seam outburst Xu et al (2021) obtained the uneven distribution characteristics of stress and permeability of disturbed coal seam Liu et al (2011) probed into the deformation and stress relief characteristics of the highEvolution of mining stress field and the control

Modelling the cumulative impacts of future coal mining and coal seam

01/07/2021· Viney et al (2021) presented a methodological framework for modelling the impacts of future coal mining and coal seam gas extraction on surface water resources and streamflow This methodology enables the prediction of cumulative impacts from multiple coal resource developments and distributes these predictions at multiple locations in the landscape It is28/10/2019· Introduction In the mid‐1990s, commercial production of coal seam gas (hereafter also CSG) began in Australia in Queensland's Bowen and Surat Basins1 1 Tentative moves to extract CSG in Australia began in Queensland in the 1970s (Keogh, 2013; Scott, 2013) Over the ensuing decades, the industry grew to the point where exploration and/or extraction licencesCoal seam gas: a space‐based perspective Schweinsberg 2020

Study on generation, migration and accumulation of CO in the mining

2 天前· Wang, D P et al Distribution characteristic and migration mechanism of toxic gases in goafs during closedistance coal seam mining: A casemining area l A coal seam gas content named as total gas content can be determined by three components These components are “Lost Gas”, “Desorbed Gas or Measured Gas” and “Residual Gas” which are determined by the rules of U Gas Content Direct Method (Bertard et al, 1970; Diamond and Levine, 1981; Diamond et al, 1986; Diamond andAn Investigation of the Coal Seam Gas Content and Compositon

Investigation on coal seam distribution and gas occurrence law

20/02/2018· Gas pressure is the basic parameter that determines the coal seam gasbearing capacity and the dynamic characteristics of gas (Aguado and Nicieza, 2007; Chen, 2011; Xue et al, 2011) At present, the current codes and regulations in China take the gas pressure as an important index of coal and gas outburst identification and regional prediction for coal seamThe optimized gas drainage technology has a good eﬀect on gas control in coal seam group mining under the inﬂuence of faults The absolute gas emission of the working face is reduced to 28~36m 3/min, the gas concentration in the upper corner of the mining face is about 06%, and the gas concentration of the return airﬂow is reduced to less than 05% The gasMining Stress Distribution and Gas Drainage Application of Coal Seam

Technical scheme and application of pressurerelief gas extraction

01/05/2018· A pressure relief gas extraction technical model of a typical mining area is proposed based on coal and gas simultaneous extraction theory Flac 3D was employed to model vertical stress and displacement contour plot characteristics of nonoutburst coal seam (No 4) on top of outburst coal seam (No 2) along strike and incline directions Field investigations wererelation to coal seam gas and large coal mining developments are a matter of national environmental significance This is known as the ‘water trigger’ and means that coal seam gas and large coal mining developments require Australian Government assessment and approval if they are likely to have a significant impact on a water resource All groundwaterdependentInformation Guidelines Explanatory Note Department of

ON DISTRIBUTION CHARACTERISTICS OF THE TEMPERATURE FIELD AND GAS

The gas content result obtained without considering the prediction of coal temperature was larger Peng et al [20] used the method of physical similarity simulation to study the changes in coal seam temperature during the process of coal seam gas desorption under the condition of extraction and obtained the influence pattern of the initial gasborehole Kong et al (2014) studied the mining sequence of close distance coal seam by simulation analysis and determined the ﬁrst mining layer according to the degree of stress relief Chen et al (2014) used numerical simulation to get the threedimensional stress characteristics of the protective seam in Huainan coalﬁeld At the sameEvolution of mining stress field and the control technology of

Environmental impact of coal mining and coal seam gas

The extraction of coal and coal seam gas (CSG) will generate produced water that, if not adequately treated, will pollute surface and groundwater systems In Australia, the discharge of produced water from coal mining and related activities is regulated by the state environment agency through a poll Environmental impact of coal mining and coal seam gas productionCoal Bed Methane (CBM) or Coal Seam Methane (CSM) is primary coal seam gas collected from unmined coal beds These coal seams are drilled down into, releasing the associated gas which is extracted and can be used to generateCoal Gas | Coal Mine Methane | Coal Seam Methane

Modelling the cumulative impacts of future coal mining and coal seam

01/07/2021· Viney et al (2021) presented a methodological framework for modelling the impacts of future coal mining and coal seam gas extraction on surface water resources and streamflow This methodology enables the prediction of cumulative impacts from multiple coal resource developments and distributes these predictions at multiple locations in the landscape It is01/07/2016· The gas pressure and gas content are both important indicators in the evaluation of outburstprone risks of the coal seams (Diamond and Schatzel, 1998, Wang et al, 2012)Generally, a coal seam with a gas pressure greater than 074 MPa or a gas content greater than 8 m 3 /t is considered to have the potential of initiating an outburst (StateEvaluation of the remote lower protective seam mining for coal mine gas

Study on generation, migration and accumulation of CO in the mining

2 天前· Wang, D P et al Distribution characteristic and migration mechanism of toxic gases in goafs during closedistance coal seam mining: A case20/02/2018· Gas pressure is the basic parameter that determines the coal seam gasbearing capacity and the dynamic characteristics of gas (Aguado and Nicieza, 2007; Chen, 2011; Xue et al, 2011) At present, the current codes and regulations in China take the gas pressure as an important index of coal and gas outburst identification and regional prediction for coal seamInvestigation on coal seam distribution and gas occurrence law

Mining Stress Distribution and Gas Drainage Application of Coal Seam

The optimized gas drainage technology has a good eﬀect on gas control in coal seam group mining under the inﬂuence of faults The absolute gas emission of the working face is reduced to 28~36m 3/min, the gas concentration in the upper corner of the mining face is about 06%, and the gas concentration of the return airﬂow is reduced to less than 05% The gas01/01/2004· However, multiseam CBM/CSG coproduction still faces the twin challenges of theoretical foundation and technical process, and the gas productivity of CBM comining wells needs to be furtherRevised geology and coal seam gas characteristics of

Numerical simulation of hydraulic fracturing in coal seam for

02/07/2018· Wang et al (2017) proposed flowsolid coupling model and analyzed influencing factors of gas migration in coal seam Xue et al (2017a) built a thermohydromechanical model for controlling the premining gas drainage with slotted boreholes So far, hydraulic fracturing and gas drainage are separately studied although these processes have beenborehole Kong et al (2014) studied the mining sequence of close distance coal seam by simulation analysis and determined the ﬁrst mining layer according to the degree of stress relief Chen et al (2014) used numerical simulation to get the threedimensional stress characteristics of the protective seam in Huainan coalﬁeld At the sameEvolution of mining stress field and the control technology of

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