To effectively monitor gas explosion and coal spontaneous combustion in coal mine, an intrinsically safe and explosion-proof dual-gas sensor system was developed for methane (CH 4) and carbon monoxide (CO) measurement.A distributed feedback (DFB) laser was used to scan two adjacent absorption lines (CH 4: 4284.51 cm −1, CO: …
Sustainable mining: Examining the direct and configuration path of legitimacy pressure, dual embeddedness resource dependency and green mining …
According to the characteristics of coal–rock dynamic disasters and hydraulic slotting, the mechanism of dynamic load barrier and static load pressure relief in hydraulic slotting is proposed. The stress distribution in a coal mining face and the slotted area of a section coal pillar is analyzed by numerical simulation. The results show that the slot formed by …
The principle of the dual pressure relief technology applied in the mining roadway of ultrathick coal seams. (a) Before mining the working face by using dual pressure relief.
The advancement of coal mining has the dual effect of pressure relief and stress concentration in front of the working face. The stress concentration is the largest in the range of 15–25 m in front of the stoping position, and the permeability is also minimized in this range, which results in local blockage and accumulation of coal seam water ...
We built a dual pressure and outburst prevention model for floor rock roadways and applied it on site to obtain new outburst prevention methods in the strip zones of deep coal roadways for future reference. ... Evolution of overburden mining-induced fractured zone and pressure-relief gas drainage in soft rock protective seam. J Mining …
Before the peak value of gas pressure, the gas pressure of the coal seam increases with increasing mining stress. At this stage, the coal seam is in the state of a …
Where: H1 - hashrate of the main algorithm ; H2 - secondary algorithm hashrate ; H1_max - maximum theoretical hashrate of the primary algorithm ; The default value for --dual-algo-mode is a12, which means that all video cards will mine in dual mode with default settings.. Non-LHR graphics cards will attempt to support 98% of the main …
To study the fissure-stress evolution law of overburden rock in the process of working face advancing in the dual fault area. This paper took the geological occurrence condition and actual mining situation of working face 21,129 of Tucheng mine as the engineering background. The method of similarity simulation combined with field …
For use on large machinery, effective in harsh conditions. Dual-line systems dispense a precise, metered amount of lubricant to up to 2 000 lubrication points over long distances up to 120 m (131 yd) and more. Even if one pair of outlets becomes blocked inside one metering device, dual-line systems provide sufficient lubrication for the rest of the …
A dual sprocket chain as a noise control for a continuous mining machine1) Adam K. Smitha), Peter G. Kovalchikb), Lynn A. Alcornb)and Rudy J. Mateticb) Over-exposure to noise remains a widespread, serious health hazard in the U.S. mining industry despite 25 years of regulation. Most other categories of illnesses and injuries associated with ...
Results show that blasting roof cutting blocks the transmission of the abutment pressure to the working surface to the coal and rock mass in front of the …
To control rockbursts in mining roadways in ultrathick coal seams, a new method for preventing rockbursts through dual pressure relief by roof cutting through cumulative blasting in medium-deep boreholes from the conveyor gateway and return airway was proposed. The mechanical characteristics of key overlying strata of the …
The average Bowen Basin coal mine also receives >900 truckloads of combustible diesel per year to fuel the haul truck fleet and the adoption of M.E.S. dual fuel technology can reduce this by ~70% i.e. from 900 truckloads (17 per week) to 270 truckloads (5 per week) reducing the heavy vehicle pressure on public roads, further reducing emissions ...
To control rockbursts in mining roadways in ultrathick coal seams, a new method for preventing rockbursts through dual pressure relief by roof cutting through cumulative blasting in medium-deep ...
P78 Series. P78 Series Pressure Controls are precision-engineered for dual pressure applications. The single-pole, double-throw switch lets you install alarms or other control circuits. Use with common refrigerants as well as air, water, and other non-corrosive fluids. Customize to your application with automatic and manual reset and numerous ...
Sustainable mining: Examining the direct and configuration path of legitimacy pressure, dual embeddedness resource dependency and green mining towards resource management. Sandra Asantewa Ampofo, Shao Yunfei, Evans Opoku-Mensah, Effah, Priscilla Tuffour, Debora Darko and Emelia Asiedu-Aryeh. ...
Xie et al. constructed a mechanical model for the coupling of mining stress and gas pressure in gassy coals and found that the gas pressure of coal seams in the working face is exponentially and ...
Behaviour and tuning. There are a few options to control the behaviour and fine-tune the performance of the GPUs in respect to how they dual mine. See the options below: --dual-algo-mode :
Coal is the main energy source in the world and plays an irreplaceable role in the development of the economy and the world (Sellers and Klerck 2000; Wang et al. 2020).With the rapid development of the economy, coal demand and production capacity continue to increase, and mine geological conditions are becoming more and more …
Compared to the adjacent unfractured No. 8203 working face, the mine pressure intensity of the No. 8202 working face is significantly reduced. The research …
Compared with the initial matrix pore gas pressure value of 0.8 MPa, the pressure value decreased significantly. The gas flow of dual-porosity/dual-permeability …
Dual mining can be enabled with --dual-algo parameter which should be preferred over the deprecated --lhr-algo. ETH+ALPH. Quick start: see "ETH+ALPH" *.bat/*.sh file in the miner archive on how to run it. If you are using HiveOS or any other mining OS that launches T-Rex with a config file rather than command line arguments, …
Dual mining was quite popular in 2017 as you could mine Ethereum and a lot of different coins at the same time. Because the other - dual - coins are harder to mine these days, the popularity of dual mining has slowly decreased. Nevertheless, since some miners are still interested in dual mining and new coins were recently presented, dual mining ...
Fig. 3 shows the T-S and P-V diagrams of the waste heat power generation, where the numbers correspond to the black spots in Fig. 1.The whole cycle contains five processes: (1) Adiabatic compression process in the pump and the heat transfer from the kiln shell (1 → 2), the cooling water from the condenser is compressed by the feed water …
During the mining process, the overburden rock moves and breaks under the action of tensile stress and support pressure, which makes the goaf a complex semi-closed multi-field coupled porous medium space with the process of mining pressure relief, gas desorption seepage and coal spontaneous combustion thermodynamic effect, with …
Coercive pressure is based on political influence and the problems of legitimacy (DiMaggio and Powell, 1983). ... Examining the direct and configuration path of legitimacy pressure, dual embeddedness resource dependency and green mining towards resource management. 2023, Resources Policy. Show abstract. The mining industries' …
Mining Dual Networks: Models, Algorithms, and Applications. Authors: Yubao WU. ... Toll-like receptor 4 contributes to blood pressure regulation and vascular contraction in spontaneously hypertensive rats. Clin. Sci. 122, 11, 535--543. Google Scholar Cross Ref; The Wellcome Trust Case Control Consortium. 2007. Genome-wide …
A rock burst is a dynamic disaster in which excavation or other external disturbances cause the sudden release of elastic deformation energy (Zhou et al. 2011).The long-term development and use of coal resources has led to the gradual depletion of shallow resources, with the depths of coal mining extending at a rate of 10–25 m per …
Coal water co-mining is the rational exploitation of two resources under the premise of water conservation, security, and environmental protection (Bai et al., 2009). After the concept and ...