Experimental Research Research Articles

The role of olive oil and its constituents in mental health: a scoping review.

Mounting evidence suggests that the Mediterranean diet has a beneficial effect on mental health. It has been hypothesised that this effect is mediated by a variety of foods, nutrients and constituents; however, there is a need for research elucidating which of these components contribute to the therapeutic effect. This scoping review sought to systematically search for and synthesise the research on olive oil and its constituents and their impact on mental health, including the presence or absence of a mental illness or the severity or progression of symptoms. PubMed and OVID MEDLINE databases were searched. The following article types were eligible for inclusion: human experimental and observational studies, animal and preclinical studies. Abstracts were screened in duplicate, and data were extracted using a piloted template. Data were analysed qualitatively to assess trends and gaps for further study. The PubMed and OVID MEDLINE search yielded 544 and 152 results, respectively. After full-text screening, forty-nine studies were eligible for inclusion, including seventeen human experimental, eighteen observational and fourteen animal studies. Of these, thirteen human and four animal studies used olive oil as a comparator. Observational studies reported inconsistent results, specifically five reporting higher rates of mental illness, eight reporting lower and five reporting no association with higher olive oil intake. All human experimental studies and nine of ten animal studies that assess olive oil as an intervention reported an improvement of anxiety or depression symptoms. Olive oil may benefit mental health outcomes. However, more experimental research is needed.

What Can Conjuring Tell Us About Cognition? The Future of the Science of Magic

During the past 20 years a number of articles have appeared within a field that has become known as the “science of magic.” This subdiscipline of psychology posits that the ancient art of conjuring can be used to develop psychological theories and knowledge, and more than 150 peer-reviewed articles have now been published. In the current article, we critically evaluate what can be considered as the three central tenets of the discipline: that the methods used in magic can be incorporated within experimental research, that magicians have particular insight into human cognition and behavior, and that the deconstruction of magic tricks can uncover novel psychological principles and mechanisms. We also discuss the problem that secrecy in conjuring creates for experimentalists and posit several recommendations that future scientists of magic might want to consider.

Efficiency of phosphorus fertilizers: research results in long-term field experiments in Russia, Great Britain and China

The results of research in long-term field experiments on the effectiveness of phosphorus fertilizers are presented. All experiments were based on the classical scheme and included, in addition to the control variant (without fertilizers), a nitrogen-potassium background, on which the effectiveness of phosphorus fertilizers was studied. At the same time, regional specifics were taken into account in each experiment: liming at the Experimental Station of the All-Russian Research Institute of Agrochemistry (Russia), the effectiveness of phosphorus fertilizers at increasing doses of nitrogen N100–300 at the Rothamsted Experimental Station (Great Britain), a combination of phosphorus fertilizers with manure at the Chinese National Soil Fertility Monitoring Base. In long-term experiments, the dynamics of changes in the content of mobile phosphorus, as well as individual fractions, taking into account the emerging balance of P2O5, are presented. It is shown that the redistribution of phosphorus between different soil fractions is reversible, and the direction of the processes depends on the emerging balance of P2O5. Phosphorus accumulated in more firmly held forms can subsequently be released and absorbed by cultivated crops. In all field experiments an increase in the yield gap between NK and NK + P variants was observed over time. On the one hand, this is due to a significant decrease in the phosphorus content in the background NK variant (in acidic soils – also an increase in Al mobility), in which phosphorus removal significantly exceeds control (without fertilizers), on the other – a significant increase in the content of P2O5 in the soil with a positive balance. In a long-term experiment at the Experimental Station of the Institute of Agrochemistry, the difference coefficient of phosphorus utilization from fertilizers was 25–27, at the Rothamsted station – 25–41, at the Chinese National Soil Fertility Monitoring Base – 45%. Attention is drawn to the high payback of phosphorus fertilizers in experiments at the Rothamsted experimental station (Great Britain) – 22–39 kg of grain/kg of P2O5 (when cultivating winter wheat in crop rotation). The main method of increasing payback in this case was the use of high doses of nitrogen – up to 200 kg N/ha. Studies have shown that liming acidic soils to a slightly acidic reaction, the use of zinc micronutrients, as well as phosphate-mobilizing microorganisms, are essential methods to increase the effectiveness of phosphorus fertilizers.

Effect of Substituents on Chitosan-Derived Sustainable Corrosion Inhibitors: Experimental and Computational Studies of Inhibition and Adsorption Performance.

This work involves the synthesis of two chitosan derivatives by reacting chitosan, extracted from shrimp shells in eastern Morocco, with 2-nitrobenzaldehyde via a Schiff base reaction. An amino derivative of chitosan was then produced by reducing the imine group created by sodium borohydride. We investigated the molecular weight (Mw), crystallinity index (CrI), and degree of deacetylation (DDA) of the isolated chitosan, among other characteristic features. Thermogravimetric analysis (TGA), X-ray diffraction (XRD), and attenuated total reflectance Fourier transform infrared spectroscopy (FTIR-ATR) were used to characterize the extracted chitosan (CS), 2-nitroben-chitosan Schiff derivative (CS-2NI), and chitosan amino derivative (CS-2NA). In a corrosive medium of 1 M HCl, the three ligands, CS, CS-2NI, and CS-2NA, were used as mild steel corrosion inhibitors. Electrochemical studies were used to analyze the surface shape and assess the inhibitory efficiency. They reveal a significant inhibitory efficiency of 92.31% for the CS-2NI derivative, highlighting the effectiveness of the imine group (═N-) and the nitro group (-NO2) compared to the two amino groups (-NH2 and -NH-) present in the CS-2NA derivative. To support experimental research, a computational study was carried out that combined the simulated annealing technique. The three inhibitors behave as mixed-type corrosion inhibitors. Thermodynamic analyses and adsorption studies revealed that the tested inhibitors create covalent bonds with the steel surface (chemisorption) as well as physical interactions (physisorption), in accordance with the Langmuir model. The identification of the ligands' adsorption sites on the steel surface was made more accessible by computational methods, demonstrating the relationship between the inhibitory properties and the chemical structure of these biodegradable and biocompatible biopolymers.

Biocompatibility of light responsive materials prepared for accommodative intraocular lenses manufacturing.

To investigate the biocompatibility and bacterial adhesion properties of light responsive materials (LRM) and analyze the feasibility and biosafety of employing LRM in the preparation of accommodative intraocular lenses (AIOLs). Employing fundamental experimental research techniques, LRM with human lens epithelial cells (hLECs) and human retinal pigment epithelium cells (ARPE-19 cells) were co-cultured. Commercially available intraocular lenses (IOLs) were used as controls to perform cell counting kit-8 (CCK-8), cell staining under varying light intensities, cell adhesion and bacterial adhesion experiments. LRM exhibited a stronger inhibitory effect on the proliferation of ARPE19 cells than commercially available IOLs when co-cultured with the undiluted extract for 96h (P<0.05). Under other culturing conditions, the effects on the proliferation of hLECs and ARPE-19 cells were not significantly different between the two materials. Under the influence of light irradiation at intensities of 200 and 300 mW/cm2, LRM demonstrated a markedly higher inhibitory effect on the survival of hLECs compared to commercially available IOLs (P<0.0001). They also showed a stronger suppressive effect on the survival rate of ARPE-19 cells, with significant differences observed at 200 mW/cm2 (P<0.001) and extremely significant differences at 300 mW/cm2 (P<0.0001). Additionally, compared to commercially available IOLs, LRM had a higher number of cells adhering to their surface (P<0.05), as well as a significantly greater number of adherent bacterium (P<0.0001). LRM, characterized by their excellent non-contact tunable deformability and low cytotoxicity to ocular tissues, show considerable potential for use in the fabrication of AIOLs. These materials demonstrate strong cell adhesion; however, during photothermal conversion processes involving shape deformation under various light intensities, the resultant temperature rise may harm surrounding cells. These factors suggest that while the material plays a positive role in reducing the incidence of posterior capsule opacification (PCO), it also poses potential risks for retinal damage. Additionally, the strong bacterial adhesion of these materials indicates an increased risk of endophthalmitis.

Impact of Room Colors and Construction Materials on Temperature Distribution in Tropical Climate: An Experimental Study in Nonthaburi, Thailand

This experimental research investigates the thermal performance of different room colors and construction materials under Thailand's tropical climate conditions. The study was conducted over a six-month period in Nonthaburi, Thailand, examining temperature variations across multiple room configurations. Using precision monitoring equipment, we analyzed how traditional Thai building materials and various wall colors affect indoor temperature distribution. The research encompassed both modern and traditional Thai construction materials, including concrete, brick, traditional teak wood, and bamboo, combined with different wall colors (white, cream, terra cotta, and dark blue). Results demonstrated that rooms with traditional materials like teak wood maintained lower average temperatures (by 3.2°C) compared to modern concrete structures, while light-colored walls showed up to 4.1°C temperature difference compared to darker colors during peak sunshine hours.

The effect of an escape room game on students’ academic self-efficacy and motivation for critical thinking: oncology nursing course

ObjectiveThis study investigated the effect of an escape room game on oncology nursing course students academic self-efficacy and motivation for critical thinking.MethodsThis study adopted a one-group pretest–posttest experimental research design. The sample consisted of forty-two nursing students. Data were collected using a personal information form, the Academic Nurses’ Self- Efficacy Scale, and the Critical Thinking Motivational Scale. The data were analyzed using descriptive statistics, t-test, Pearson-Spearman, Wilcoxon test.ResultsNone of the nursing students had played an escape room game for educational purposes before (100%; n = 42). The escape room game helped nursing students develop academic self-efficacy and boosted their motivation for thinking critically respectively (t = -3.252, p = 0.002; Z = -2.027, p = 0.043). More than 90% of the students reported that the escape room game helped them understand the subject, retain information, and apply it effectively.ConclusionUniversities should incorporate escape room games within the scope of oncology nursing courses as an alternative teaching approach to help students enhance their academic self-efficacy and critical thinking motivation. Researchers should plan studies with different samples to investigate the impact of escape room games on academic self-efficacy and critical thinking motivation.

The Influence of Rubber Hysteresis on the Sliding Friction Coefficient During Contact Between Viscoelastic Bodies and a Hard Substrate

This paper describes research aimed at the experimental determination of the influence of rubber hysteresis on the friction coefficient between rubber samples for making soles and granite tiles. In the experiments, four types of shoe rubber with similar hardness and different hysteresis properties and two granite tiles with different roughnesses (smooth and anti-slip) were used. The determination of rubber hysteresis was carried out experimentally on a uniaxial testing machine. The friction coefficient was measured using a device specially developed for this type of test, which was based on the pulling force method, while the measurement conditions were based on the EN 13893:2011 standard. The friction coefficient was measured at two different speeds, 50 mm/s and 300 mm/s, with different surface conditions. Using regression analysis and the Taguchi method, the data obtained from the experiments were analyzed to determine the influence of parameters on the friction coefficient. The experimental research shows that different rubber mixtures with the same or similar hardness could have different hysteresis properties but also different friction properties.

Unpacking WHO and CDC Bottle Bioassay Methods: A Comprehensive Literature Review and Protocol Analysis Revealing Key Outcome Predictors

Background Resistance monitoring is a key element in controlling vector-borne diseases. The World Health Organization (WHO) and Centres for Disease Control and Prevention (CDC) have each developed bottle bioassay methods for determining insecticide susceptibility in mosquito vectors which are used globally. Methods This study aimed to identify variations in bottle bioassay methodologies and assess the potential impact on the data that is generated. Our approach involved a systematic examination of existing literature and protocols from WHO and CDC, with a focus on the specifics of reported methodologies, variation between versions, and reported outcomes. Building on this, we experimentally evaluated the impact of several variables on bioassay results. Results Our literature review exposed a significant inconsistency in the how bioassay methods are reported, hindering reliable interpretation of data and the ability to compare results between studies. The experimental research provided further insight by specifically identifying two key factors that influence the outcomes of bioassays: mosquito dry weight and relative humidity (RH). This finding not only advances our comprehension of these assays but also underscores the importance of establishing precisely defined methodologies for resistance monitoring. The study also demonstrates the importance of controlling bioassay variables, noting the significant influence of wing length, as an indicator of mosquito size, on mortality rates in standardized bioassays. Conclusions Generating data with improved protocol consistency and precision will not only deepen our understanding of resistance patterns but also better inform vector control measures. We call for continued research and collaboration to refine and build consensus on bioassay techniques, to help bolster the global effort against vector-borne diseases like malaria.

Review of “Experimental Research Designs in Social Work: Theory and Applications”

Review of “Experimental Research Designs in Social Work: Theory and Applications”

Preferred Chemical Agent for Electrochemical Modification of Physical and Mechanical Parameters of Mudstone

To study the influence of electrochemically modified mediums on the physical and mechanical parameters of mudstone samples, focusing on electrolyte solutions and electrode materials, this paper combines theoretical analysis and experimental research. It analyzes the modification mechanism of mudstone through electrochemical techniques, clarifying that the main factors improving the strength of mudstone are electro-osmotic drainage consolidation and electrochemical reaction cementation. The mudstone was electrochemically modified using the controlled variable method. The mudstone sample’s hydraulic properties and shear strength were measured before and after modification. The study compared and analyzed the effectiveness of different modified materials. The results indicated that the liquid limit of the modified mudstone samples decreased by 7.874%, while the plastic limit increased by 9.499%. The type of ions introduced by the electrolyte solution influenced the cementation strength of the mudstone. AlCl3 solutions with a 10% mass fraction and CaCl2 solutions with a 25% mass fraction both effectively modify the reinforcement; however, the AlCl3 solution with a 10% mass fraction is the most effective for modifying mudstone samples. The electrochemical modification of mudstone samples with the three electrode materials (graphite, iron and aluminum) revealed that the samples modified with graphite electrodes had the highest shear strength, while those modified with aluminum electrodes had the lowest shear strength. The internal friction angle of graphite electrode-modified mudstone specimens was 26.7°, compared to the original value of 23.9°, and the cohesion was 34.4 kPa, compared to the original value of 12.3 kPa, nearly three times the original value. It is recommended to use graphite electrodes and a 10% mass fraction of AlCl3 for the electrochemical modification of this type of mudstone in engineering applications.

Cognitive Reappraisal Reduces Academic Anxiety in University Students With Dyslexia

ABSTRACTUniversity students with dyslexia have greater anxiety than their peers without dyslexia, especially related to their academic studies. Most universities focus on mitigating the learning needs of these students, for example, providing more time during exams. Relatively little attention is paid to the psychological impact of having dyslexia. In this preregistered study, we investigated whether cognitive reappraisal reduced academic anxiety in university students with dyslexia. We codesigned negative and neutral scenarios about academic life with university students with dyslexia. We presented university students (54 students with dyslexia and 51 neurotypical students) with these scenarios about academic life and asked them to rate their anxiety. As hypothesized, we observed that students with dyslexia had higher academic anxiety than those without dyslexia (d = 0.43). When instructed to use cognitive reappraisal, all students, irrespective of having dyslexia or not, benefitted from an anxiety reduction (d = 0.87). Our experimental research indicates cognitive reappraisal may be a valuable tool to support students. Furthermore, it may help those with dyslexia to manage the heightened emotional demands of academia. Intervention trials that assess the real‐world implementation of cognitive reappraisal are now warranted.

The Influence of the Solid Phase on the Properties of Foam Concrete

An overview of literary sources related to the formation and development of the technology of aerated concrete is given. It is shown and systematized in which directions scientific research aimed at improving their functional properties was conducted. It is noted that almost all researchers associate the dependence of the properties of porous concrete with the character of their porosity. The conducted analysis allowed the authors to hypothesize that the properties of aerated concrete are exclusively determined by the nature of the distribution of the solid phase, that is, by the nature of its structure. Determination of the influence of the solid phase and its nature on the properties of aerated concrete is devoted to experimental studies. They were conducted in two stages. At the first, when applying physical modeling, the effect of the total porosity and water consumption of the dry mixture on the change in the nature of the solid phase of the model was studied. Internal interfaces between structural elements are taken as characteristics of the solid phase - their total length and width. It is shown that the water consumption of the mixture has different effects on materials with a dense and porous structure. At the next stage of experimental research, the influence of the water consumption of the mortar mixture on its strength (strength of the matrix material) and the strength of foam concrete was studied. The initial rheological conditions of the formation of the structure were changed by changing the size and amount of filler, changing the amount of liquid and plasticizing additives. The results of the experiments confirmed that the initial rheological conditions have different effects on the materials of dense and porous structure. Under certain conditions, in materials with a porous structure (in foam concrete), an increase in the water-solid ratio leads to an increase in the strength of concrete. Which indicates that with such water consumption, more favorable conditions are created for the formation of a porous structure, which is reproduced on the character of the solid phase. The given results confirm the given hypothesis and can be used in the synthesis of new building materials, including with the use of artificial intelligence.

Experimental Investigation of Magnetic Drum Separation Techniques for Dodder (Cuscuta L.) Seed Removal from Alfalfa Seed Mixtures

Thousands of species of parasitic weeds, such as dodder, pose significant threats to agricultural crops due to their ability to spread rapidly through seeds. When cultivated lands become infested with dodder, the quality of production declines, leading to substantial damage. The most effective way to limit the infestation of agricultural lands by parasitic weeds, particularly dodder, is to control the quality of seeds intended for sowing. To obtain seed material free of dodder seeds, special separation machines equipped with magnetic drums are used. These machines operate on the principle of magnetic fields acting on ferromagnetic particles, which helps differentiate the physical states of the seeds intended for separation. This paper presents experimental research on magnetic drum separation techniques for removing dodder seeds from alfalfa seed mixtures. The study examines variables such as magnetic drum speed, feed rate, amounts of iron powder, water, solution (water and glycerin), and the initial content of dodder seeds. The experimental results indicated that using a water–glycerin solution at optimal concentrations for moistening the seeds enhances the separation efficiency of dodder seeds from alfalfa seed mixtures, compared to using only water. Additionally, the numerical content of dodder seeds in the A and C sorts, which primarily contain the seeds of the main crop, decreases with each pass through the machine, resulting in higher quality seed material. The research found that using appropriate parameters—drum rotation speed (20 rpm), iron powder quantity (19 g/min), and seed feed rate (25.39 g/s)—achieved a “free” classification for dodder in alfalfa seeds. These findings are valuable for evaluating the performance of separation equipment with magnetic drums to obtain high-quality seed material. They are also beneficial for designers, machine-building units, and economic agents specializing in this field.

Preparation and Performance of Filled Resin Based on Long Afterglow Materials in Gingival Wall Lifting Surgery

The study was conducted to solve the problems of low monomer conversion rate and insufficient curing depth of dental resin complexes during curing in gingival wall elevation procedures. A dental composite resin was prepared by modifying the blue emitting long afterglow luminescent material. Then it was applied in the treatment of oral caries for experimental research. The results showed that the afterglow of the SMSED material showed high brightness and blue, with its thermoluminescence peak higher than that of the control group, reaching a maximum of 3 × 106. The curing performance was better. It was 9.17 % higher than CAED and 10.27 % higher than SAED. The accuracy of the measurements for the different resins in the study was about 5.67 %. In addition, the double bond conversion rate of the composite resin doped with 1 wt.% increased by 114.16 % compared to the composite resin without SMSED doping. The structure and size of composite resins containing 1 wt.% research materials were more stable. Overall, the cell survival rate for 1 – 3 days was higher than 70 %, indicating that the modified composite resin had lower toxicity to L929 cells. Overall, the performance of the dental composite resin prepared by modifying the blue emitting long afterglow luminescent material is significantly improved, indicating its effectiveness and practicality. It can be practically applied in the treatment of dental caries in gingival wall lifting surgery.

Experimental and pilot model research of spiral cyclone with curvilinear channels

The advanced type of cyclone was applied to separate wood particulate matter from the air. The cyclone was designed in the laboratory of Vilnius TECH. A series of experimental studies was conducted both in the lab and under industrial conditions. These studies aimed to specify the air velocity and aerodynamic resistance in the experimental and pilot six-channel cyclone with spiral casings and curvilinear semi-rings. Air treatment efficiency was also determined. The highest air treatment efficiency achieved using experimental cyclone was 91.4%, while the pilot cyclone achieved an efficiency of 94. 5%. The industrial and experimental cyclones were found to have similar air treatment efficiency

An experimental study to evaluate the effectiveness of lecture cum demonstration on knowledge and practice on basic life support among lay person

: Basic Life Support (BLS) refers to a set of emergency procedures that assist individuals experiencing cardiac arrest, respiratory distress, or airway obstruction. Cardiopulmonary resuscitation (CPR) and other BLS techniques serve as crucial interventions that can save lives in critical situations. Effective training in BLS can empower laypersons to act decisively and appropriately during emergencies. To shed light on the effectiveness of a comprehensive BLS training program, incorporating lectures and practical demonstration, in empowering layperson to respond effectively to cardiac arrest situation.: To assess the knowledge of lay person regarding basic life support, To assess the practice of lay person regarding basic life support, to evaluate the effectiveness of demonstration on basic life support, to find out the association between the knowledge and practice of lay person regarding basic life support with their selected demographic variables. A quantitative research approach was employed in this study, utilizing a true experimental (one group pre-test and post-test) research design. A convenient sampling technique was used to select 60 participants for the study. Data were collected using structured questionnaires to assess knowledge and practice checklists to evaluate practical skills. Descriptive and inferential statistical methods were applied for data analysis.: The pre-test and post-test assessments revealed a significant improvement in the participants’ knowledge and practice of BLS after the training. The mean knowledge score in the pre-test was 5.75 ± 1.85 (27.38 ± 8.83%), while the mean score in the post-test increased to 12.48 ± 2.03 (59.44 ± 9.70%). The mean practice score was 11.46 ± 3.03 (40.95 ± 10.85%) in the post-test.The evaluation of the training method, which incorporated both lectures and demonstrations, showed statistically significant improvement in both knowledge and practice scores. The paired ‘t’ test for overall knowledge scores yielded a calculated value of 16.87, which exceeded the tabulated value of 2.00 (with 59 degrees of freedom), confirming the effectiveness of the intervention.: The study demonstrated that the lecture and demonstration-based training significantly improved the knowledge and practical application of Basic Life Support techniques among laypersons. As a result, the null hypothesis (H0) was rejected, and the research hypothesis (H1) was accepted.

EFFICACY OF ENGLISH LANGUAGE MODULES FOR NOVICE-COLLEGE STUDENTS: A PATHWAY TO READING SCIENTIFIC JOURNALS

This study aims at investigating significant difference in reading scientific journals of Novice students o IAI Al Qolam Malang before and after using English language module as the treatment. Accordingly, thi current study employs pre experimental research design precisely One-Group Pretest-Posttest Design wit taking 25 ELT students of al Qolam University as the samples. Based on the result of statistica calculation it is discovered that the instruction using English language module is unable to improve th Novice students’ reading skill of scientific journals at IAI Al Qolam Malang..Key words: scientific journals, Novice students, English modul

Stability of performance monitoring with prolonged task performance: A study of error-related negativity and error positivity.

The use of forced-choice response tasks to study indices of performance monitoring, such as the error-related negativity (ERN) and error positivity (Pe), is common, and such tasks are often used as a part of larger batteries in experimental research. ERN amplitude typically decreases over the course of a single task, but it is unclear whether amplitude changes persist beyond a single task or whether Pe amplitude changes over time. This preregistered study examined how prolonged task performance affects ERN and Pe amplitude across two study batteries, each with three different tasks. We predicted ERN amplitude would show unique, nonlinear reductions over an individual task and over the task battery, and exploratory analyses were conducted on Pe. Electrophysiological data were recorded during two studies: 156 participants who completed three versions of the flanker task and 161 participants who completed flanker, Go/NoGo, and Stroop tasks. ERN showed unique nonlinear reductions over each flanker task and over the battery of flanker tasks. However, ERN showed a linear reduction in amplitude over the battery of three different tasks, and within-task changes were only observed during the Go/NoGo task, such that ERN increased. Pe generally linearly decreased with prolonged task performance. Variability in ERN and Pe scores generally increased with time, indicating decreases in data quality. Findings suggest that studying ERN and Pe early in a task battery with short tasks is optimal to avoid bias from prolonged performance. Identifying factors affecting ERN and Pe during prolonged performance can help develop optimized paradigms.

Prevention and Control of Spontaneous Combustion of Coal in the Goaf Under Z+I Ventilation Based on 2GN00 mining Process

ABSTRACT Traditional coal pillar mining technology will cause the waste of resources, and the roadway excavation. The N00 process eliminates the need for roadway excavation and coal pillar storage. The ventilation mode under the N00 construction method differs from conventional U-shaped ventilation. It is difficult to determine the danger area of spontaneous combustion. Therefore, this paper takes 21607 goaf with Z+I ventilation under the 2GN00 construction method in a mine in Guizhou province as the engineering background and adopts experimental research and numerical simulation methods to prevent and control coal spontaneous combustion hazards. Firstly, the spontaneous combustion tendency experiment determines the grade of spontaneous combustion tendency of coal samples. Secondly, the Fluent numerical simulation method is used to screen the optimal wind speed ratio of the two air inlets. Finally, numerical simulation is used to select the optimal spraying distance. The results show that the spontaneous combustion grade of coal samples makes it easy to produce spontaneous combustion. By analyzing the numerical simulation results of 6 groups of wind speed ratios, the best wind speed ratio of the two inlets is 1:1. Currently, the risk area of spontaneous combustion in the goaf is 5440.8 m2. Then the numerical simulation of the best slurry spraying distance is carried out with the wind speed ratio 1:1. The optimum distance of 90 m was finally determined. The area of the spontaneous combustion hazards area was reduced to 2223.8 m2. The results provide theoretical guidance and technical support for engineering applications.