CO in coal mine underground spaces can easily cause casualties among miners. The humidity mines is relatively high, and traditional Cu-Mn catalysts are prone to deactivation. Compared catalysts, doping with Sn enhances the activity water resistance of catalysts. Cu-Mn-Sn catalyst was tested using XPS, FTIR, a self-made Activity Test Experimental System, partial data processed Avantage software. results show that increases number active sites (Cu+) on proportion surface adsorbed oxygen (Oads)...

Abstract To ensure the safe construction of prefabricated buildings and improve efficiency evacuation personnel after a fire caused by improper operation during construction, this study used PyroSim software to numerically simulate situation based on size volume building site. The variation rules smoke visibility, CO concentration, ambient temperature in site were analyzed available time was determined. Moreover, Pathfinder for simulation combination with physical attributes personnel,...

Rock is generally complex and heterogeneous, therefore the heterogeneity effects of effective stress temperature on permeability should be taken into account. In this study, two-part Hooke's model (TPHM) introduced to understand influences soft hard parts (two parts) rock based coupling thermo-hydro-mechanical tests. Under a fixed level (25 °C, 35 50 65 80 90 °C 95 °C), tests were carried out in conventional triaxial system whereas confining pressure was remained at MPa, pore increased...

In the deep mining process of coal seams, mechanical environment body is complex and in state cyclic loading unloading. The change stress leads to pore characteristics permeability. To investigate effects unloading on permeability coal, seepage experiment was carried out for samples using self-developed triaxial permeation instrument. By pressure confining continuous unloading, evolution porosity investigated. Under condition experiment, influences initial value load amplitude structure were...

This paper investigated the effectiveness of a vent burst door in isolating shock waves gas explosions coal mines and to reveal mechanisms explosion overpressure. A 17.5 m × φ 0.63 columnar test duct with similar shape roadways was designed. Explosion overpressure propagation characteristics effects methane concentration at different locations along without were experimentally investigated. The results demonstrate that plays significant role sealing area propagation. properly designed is...

The gas pressure generated during a coal and outburst is an important factor affecting the stability of mine ventilation systems. released from flows diffuses in mine, leading to uneven distribution air system formation natural wind pressure. Because effect pressure, becomes disordered, counter flow roadway. This increases complexity movement, extends influence range gas, enlarges disaster area exacerbates destructiveness. In this study, TF1M simulation program was applied simulate accident...

In view of the problem that excessive CO in underground coal mine space can easily lead to a large number casualties, Cu-Mn-Sn water-resistant eliminators with different Sn contents were prepared by co-precipitation method. The activity was analyzed using an independently developed testing platform, N2 adsorption and desorption, XRD, SEM, XPS, FTIR characterize factors water resistance. results showed Cu-Mn-Sn-20 20% content had highest activity, which 3.23 times Cu-Mn. main reason for...

Abstract To ensure the safe construction of prefabricated buildings and improve efficiency evacuation personnel after a fire caused by improper operation during construction, this study used PyroSim software to numerically simulate situation based on size volume building site. The variation rules smoke visibility, CO concentration, ambient temperature in site were analyzed available time was determined. Moreover, Pathfinder for simulation combination with physical attributes personnel,...

CO poses a severe hazard coal mine shafts, often resulting in casualties among underground workers. The prevalent high humidity these environments exacerbates the deactivation of traditional CuMn-type catalysts. This study synthesized CuMnSn-type catalysts and conducted experiments to assess their performance. incorporation tin (Sn) enhanced both activity water resistance X-ray photoelectron spectroscopy (XPS) Fourier-transform infrared (FTIR) were employed investigate influence Sn on...

<title>Abstract</title> CO in coal mine underground spaces can easily cause casualties among miners. The humidity mines is relatively high, and traditional CuMn catalysts are prone to deactivation. Compared catalysts, doping with Sn enhances the activity water resistance of catalysts. CuMnSn catalyst was tested using XPS, FTIR, a self-made Activity Test Experimental System, partial data processed Avantage software. results show that increases number active sites (Cu⁺) on...

Addressing the issue of suffocation and casualties caused by a large amount poisonous CO gas generated after explosion, research involving an experimental system for removal using Cu–Mn elimination agent was studied. The influence O2 concentration, temperature, concentration on performance explosion quantitative relationship between eliminated, rate, temperature analyzed. Further analysis completed regarding thermal effect in process. results showed that had rapid CO. When ratio to closer...

To investigate the compressive strength and permeability of deep mudstone under stress disturbance, a triaxial rheometer is used to conduct seepage experiments on specimens with different buried depths compression unloading conditions. The experimental results show that specimen depth 1000 m much lower than 200 m, increases increase in confining pressure. Under constant axial pressure pressure, exhibits brittle failure, strain fluctuates pointwise manner stress. In this case, transition from...

A large amount of gas, such as CO, accumulates in a coal mine after an explosion, leading to CO poisoning. In this study, self-developed platform was used eliminate from mines and determine the mass rapidly eliminated its concentration gases. Equations were derived calculate removing rate. The results showed that rapid reagent form nonprecious metal catalysts is useful for CO. Removing agents with larger masses facilitated activation, irrespective concentration. For amounts 10, 15, 20, 25,...