Near-infrared wide-range dual-gas sensor system for …
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 …
Sustainable mining: Examining the direct and configuration path of legitimacy pressure, dual embeddedness resource dependency and green mining …
Coal–Rock Dynamic Disaster Prevention Mechanism Based on the Dual …
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 …
A New Method for Controlling Rockbursts in the Mining …
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.
Variation characteristics of coal rock layer and gas
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 ...
Research on dual pressure relief and outburst prevention …
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 …
Coupling of stress and gas pressure in dual porosity …
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 …
T-Rex Miner: Dual mining (HiveOS and Windows)
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 …
Mechanism of Overlying Crack-Stress Evolution When Mining on the Dual
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 …
Dual-line lubrication systems | SKF Lincoln | SKF
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 …
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 ...
Study on Mining Pressure Law and Pressure Relief …
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 …
A New Method for Controlling Rockbursts in the Mining …
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 …
Dual Fuel Mobile Mining | Mine Energy Solutions
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 ...
The principle of the dual pressure relief technology applied …
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 ...
Dual Pressure
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 …
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. ...
The coupling effect of the coal seam gas pressure and mining …
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 ...
Dual mining · trexminer/T-Rex Wiki · GitHub
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 :
Analysis of Mining Effect and Fault Stability Under the
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 …
Simulation Study and Engineering Application of …
Compared to the adjacent unfractured No. 8203 working face, the mine pressure intensity of the No. 8202 working face is significantly reduced. The research …
Gas seepage laws based on dual porosity and dual …
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 · trexminer/T-Rex Wiki · GitHub
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 ⛑️ | minerstat help
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 ...
Optimization design of waste heat power generation
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 …
Coupling of stress and gas pressure in dual porosity …
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 …
Driving forces of sustainability in the mining industry: …
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
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 …
Failure characteristics and mechanism of coal under the …
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 …
Mining techniques and engineering application for "Coal-Water" dual
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 ...
