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 …

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. ...

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 …

The mining length between the pillars was 160 m, and mining proceeded by covering successive 20 m intervals, whereas a load pressure of 7.5 MPa was used to simulate the weight of the overlying ...

Compared to the adjacent unfractured No. 8203 working face, the mine pressure intensity of the No. 8202 working face is significantly reduced. The research …

Fracturing hard roofs by ground hydraulic action is an important control technology for the strong mine pressure in the stope. In this paper, a new simulation method, "separate + interface," is proposed, and two physical simulation experiments are conducted; the phenomenon of increased goaf pressure and decreased front abutment …

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 mining industries' contribution to economies has been limited to the boomtown's impact of short-term initiatives. However, the bane of mining on resource management has been a recurring theme. This study recognizes the need to investigate the interrelationship among legitimate pressure, resource dependence, and green practices in the quest for …

Based on rock mechanics, the Mining Pressure and Strata Control course at Hunan University of Science and Technology in China, is closely related to mine exploitation and mining technology, which are very important in mining engineering [1]. In addition, it is an important specialised foundation course for the mining engineering major and the ...

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 …

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 …

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 …

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 ...

Request PDF | On Oct 1, 2023, Sandra Asantewa Ampofo and others published Sustainable mining: Examining the direct and configuration path of legitimacy pressure, dual embeddedness resource ...

Dual mining of separate coins is a concept that has received a whole lot of attention in the crypto industry in the past years. More technically, the process of mining more than one cryptocoin is ...

Published 29 Aug 2021. Abstract. To control rockbursts in mining roadways in ultrathick coal seams, a new method for preventing rockbursts through dual pressure …

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 results show that the novel dual-pressure level SG layout increases the power block efficiency from 44.14% to 44.64%. Assuming a market pricing scenario of two-tier tariff and a power purchase agreement price of 16.3c€/kWh e, the new SG …

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 ...

However, the effect of the data resource value and relevant strategies on product-service supply chain decisions has rarely been investigated. In addition, research on supply chain data mining has concentrated on data mining applications in single- or dual-channel supply chains, while little research has been undertaken on cross-channel data ...

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 …

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 …

NORTH CAROLINA – Doosan Portable Power, a pioneer in dual pressure and dual flow air compressor technology, has introduced the Tier 4 Final compliant XP825/HP750 air compressor.Operating at …

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' …

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 …

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 ...

Three Versatile Modes High Power Mode for Maximum Mining Low Power Mode for Energy-Saving Efficiency Machine Sleep Mode for Longevity, Optimizing your Mining Experience ... 0.78W/M CONNECTION PORT Dual-Mode POWER SUPPORT 1200W POWER CABLE 10A WEIGHT 2.2KG DIMENSIONS 198×150×96 INPUT VOLTAGE …

While dual mining uses some of the hashing power to mine Etchash coin (e.g. ETC) and some of the hashing power to mine the second coin of a different algorithm (e.g. TON), the merged mining mines at two blockchains with the same hashing power at the same time. And while dual mining happens between two different algorithms (Etchash and another ...

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 …

Synchronous Inversion of Coal Seam Gas Pressure and Permeability Based on a Dual Porosity/Dual Permeability Model and Surrogate Optimization Algorithm. Quanlin …

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 …

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, …

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 …

NORTH CAROLINA – Doosan Portable Power has expanded its lineup of dual pressure and dual flow air compressors with the introduction of the Tier 4 Final compliant P425/HP375 and …

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 significance of the indicators presented in Figure 3 is the following: 1 – actuating shaft, 2 –cylinder block, 3 – plunger, 4 –distribution element, SI / DO - suction inlet, discharge …

A pressure regulating valve station is designed to maintain a desired downstream pressure irrespective of the flow requirement and deploying a dual leg system allows for maintenance without the risk of production impacting downtime. The LFC™_1B Dual medium to high pressure, pressure regulating valve station has been developed to …