第一次模拟国际会议资料The First Simulated International Conference

The First Simulated International Conference on Mining Engineering, Rock Mechanism and Safety TechnologyConference ProgramSponsor by: Central South University, China Supported by: Graduate School of Central South University Hosted by: Doctor English Class D3November, 04, 2013Changsha, ChinaThe First Simulated International Conference Conference Theme: Mining Engineering, Rock Mechanism andSafety TechnologyConference Time: 8:00-12:00, Monday, November,04, 2013Conference Address: Room 229, Mining BuildingSpecially Invited Adviser:ShenJinhuaSession Chair:Wu QiuhongHostess: Ma LiSecretariat:XieXiaofengOrganizing Committee:Xiexiaofeng, Ma Li, Wu QiuhongNotes for the conference program：1.The time limit for oral presentations is set as follows:It will be better if the reporting time is controlled within 5 minutes, but there are 1 minutes for the reporter answering the attendees’questions. The total time for each speaker is no more than 7 minutes. When the report runs overtime, the session chair will interrupt the speaker.2.Everyone should be punctual and leave conference only after it comes to an end.3.All participants please set your cell phone to silent mode during conference.AgendaStudy on model experiment and design method of the anti-slidingmicro-pilesMa Li135501002Abstract：This paper which is supported by transportation science and technology development and innovation project of Hunan province, has completed a large collection of anti-sliding micro-pile research information at home and abroad, and design a large-scale physical model experiment about the anti-sliding micro-pile to study the anti-sliding characteristics in Different composite structure. Then the article proposes a new method of the anti-sliding micro-pile about internal force calculation and design with the experiment results. Finally, the applicable environment of the anti-sliding micro-pile composite structure is discussed.Study on Dynamic Effects of Existing Tunnel Caused by Blasting Excavation of Undercrossing New TunnelXieXiaofeng135501003Abstract: Cross tunnel with small interval is a new kind of structure emerged in recent years. The adoption of cross tunnel with small interval is not only to meet the special requirements of unusual geological condition and overall linear route, but also conducive to the overall programming and optimization, with significant economic, social and environmental benefits. However the design and construction of this kind of tunnel remains many technical questions to be solved. For instance, when the new tunnel is close to existing tunnel，the seismic wave induced by blasting endangers the safety and stabilization of the surrounding rock and the lining of existing tunnel. With the rapid urbanization process and the further utilization of underground space, the cross tunnel with small interval will be an increasing number. The research of its design and construction technologies, impacts on existing structure, have high significance on both academic study and engineering practice.The development trend of mining technologyXieYousheng 135501004Abstract: There are more than 10 000 pits in our country, which refer to coal mines, metal mine, and others. The shallow resources are drying up, our pay more and more attention to deep resources. In the meantime, the problems caused by the deep mining engineering need for better technologies or knowledge to solve. The digital mining is an advanced technology, the technology is composed of mining science and technology, informatics, artificial intelligence, computing Science.The Caving Mining Safe Control Technology on The Multi-Mined-Out-Areas Conditions of the ShizhuyuanPolymetallic MineZouping 135501005ABSTRACT: The Shizhuyuanploymetallic mine was mining by room-and-pillar open stope method for more 10 years. After 36 designed rooms are mined out, left 2,600,000m3 mined-out areas with 8000m2 of the maximum continued exposed face of roof without filling for some reasons. For the mine sustainable development and the safe mining, one mainly issues is how to management of mined-out-areas and the pillar mining. So some study was carried out:1) After the engineering geological evaluation, the mechanics parameters of rock mass was derived by generalized Hoek-Brown failure criterion.2) Cavability (i.e. caving areas) of the Shizhuyuanploymetallic mine was worked out by Laubscher and extended Mathews methods.3) For the purpose of safety mining, the ground pressure monitoring system such as Acoustic Emission(AE), displacement and pressure method that suit for the hard rock were designed and installed. The technological routes of the ground monitoring and an early warning case are listed.STATUS AND PROSPECT OF DIGITAL MINE TECHNOLOGYWu Shuliang 135501006Abstract：With the scientific and technological progress and economic development recently，the conception ofdigital mine is widely accepted. The basic technology of digital mine can not only improve the production efficiencyand reduce the accident rate，but also the digital mine is the ultimate objective of the mining industry. This paperintroducesthe application status of digital mine. In the future，the research of high-tech digital minetechnology should be emphasized and mine intelligent technology should be popularized，which will enhance thesustained and healthy development of mining industry in our country .How to select a proper mining methodHuang Zhiguo 135501007Abstract: To select a mining method is vitally important for the design of mining. Inorder to selecta optimalmining method, some main factors should be considered carefully, and some proper approach should be followed accordingly. My report briefly introduced the main factors affecting the selection of an mining method, and a proper approach to select an mining method.Ground ControlWu Weiwei135501008Abstract: The terms ground control and strata control, which here are used interchangeably , date back some 60 years to the early 1930s when the use of rock bolts was pioneered in the United Stated. The first international conference on rock pressure andground control was held in Liege, Belgium, in 1951. In essence, ground control means maintaining rock mass stability by controlling the movement of excavations in the ground, which can be either rock and soil. This is a specialty engineering field that is important because the design of underground excavation is, to large extent, the design of underground support systems such as pillars and rock reinforcement.Although today, ground control is no longer solely a mining art since much of it can qualify as an engineering science, the application of rock and soil mechanics principles and techniques in day-to-day mine planning and design is still not common. It is hoped that the up-to-date knowledge digest contained in this chapter will contribute to better dissemination and application of ground-control concepts and techniques, some of which have been available for many years but which mining engineers have not availed themselves fully.Theoretical study of equal stress load-bearing-arch strength in deepsoft rock roadwayWangPing135501009Abstract：For the difficult support characteristics of deep-soft rock roadway, accordingto the stress distribution law and the bolt support properties, deep-soft rock roadway equal stress bearing arch strength theory by bolt was proposed. The theory is based on the roadwaystress environment, through match the length of anchor bolts, it could be formed a more uniform stress distribution of bearing structure in the surrounding rock.This bearing structurewith betterbearing ability that will maintain the stability of roadway.In addition,the formula of bearing capacity of circle-bearing arch has obtained, it has a certain reference value for the project of soft rock engineering in deep.Numerical Simulation on Mechanism of Pre-splitting crack underFilling-MiningKe Bo 135501010Abstract: In underground mining, especially in reconstructed mining environment, the study on controlling blast disturbance effect and pillar extractionclamping action is much lacked. According to the characteristics of rock mechanics and explosives, using JWL state equation of high explosive and explicit dynamical analysis software package LS-DYNA, the mechanism of pre-splitting near backfill was simulated on the basis of study on fragmentation ore block’s mining in GaoFeng mine, China Tin group Co. Ltd.Study of Mechanical Property of Limestone Specimenswith Natural Continuous PlaneWu Qiuhong135501012Abstract:Rock is made of mineral grains with fissures, beddings and cracks, heterogeneity and anisotropy of rock can occur at micro and macro scales，and it is not nonlinear elastic at all. On basis of granite and limestone with natural single continuous weak plane, heterogeneity, anisotropy and mechanical parameters of rock were studied.BASED ON MICRO-SEISMIC MONITORING TECHNOLOGY IN MINESAFETY MANAGEMENT RESEARCHHuang Weixin 135501013Abstract: As the superficial resource in mine is beening exhausted, mining-induced seismicity is becoming an serious economic and secure problem in deep mining.It’s necessary for secure produce and people’s life and property to research the response lower and fataless for forecast of mining-induced seismicity. This paper deeply studied theresponse lower of mining-induced seismicity in Dongguashan copper mine.It included space-time lower,related characteristics of magnitude-frequency and energy-seismic moment,stress-strain lower and relations between seismicity and exploitation,and get some perfect results.The Typical Application of Room and Pillar MethodinErlihe Lead-zinc MineWang Chun135501014Abstract：The form of ore body in Erlihe Lead-zinc Mine is irregular，which looks like a saddle. The ore body is so hick and large that it is very difficult to exploit．The mine adopt open stope method with footwall chute used to be applied for mining，but the effect is not ideal．According to the mining technical condition of ore body ,the room and pillar method is recommended．The research results show that loss ratio,dilution ratio and mining-cut ratio are all significant fall．At the same time，the roof of goaf was controlled effectively by using the anchor to support.The room and pillar method is an ideal mining method for mining the saddle of ore body by synthesizing all kinds of factors．The application of the Dimine in open-pit mineXiao Yingcai135501015Abstract: Establishing production plan of open-pit mine is aindispensable link in mining engineeringnowadays, In this paper, testablishingthe orebody model and the surface model based on the original geological data by DIMINE software,with the actual data, optimize the design of the open-pit, and on the basis, the system can automatically optimize the order of stripping, meanwhile technical staff canparticipatein the preparation of strippingplan.The results show thatusing the three-dimensional visualization can obtain satisfactory state of shell open.can effectively guide the design ofmining stage or mid -long term production plan On Open-pit standing on the actual production data, it can provide new workable way for stripping planoptimization, meanwhile ,it improves the production efficiency and achieve the goal of quick work in open-pit mine .Numerical Simulation of Hydraulic Fracturing in Coal BedSun Gangzhong135501016Abstract: The gas extraction is an effective means in dealing with the gas，Hydraulic fracturing for increasing permeability is an effective technological approach in low-permeability coal seam，to get the cracks of rock mass in Hydraulic fracturing , using Flac3d to simulate. Set the criterion of crack development.A computing algorithm with moving boundary condition was developed on the basis of discontinuum mechanics and implemented in FLAC3D.FLAC3D offers the advantage to integrate all fractures in one single computing model.Prediction and Safety Analysis for Ground Subsidence of Transition from Open Pit to Underground MiningKeYuxian 135501017Abstract：In order to maximize mining the underground resources and ensure the safety of the buildings and structures located at ground, the ground subsidence and movement induced by transition from open pit to underground mining of Xinqiao Mine was studied based on a three-dimensional model established by MIDAS/GTS. The results showed that the largest value of surface tilt(i), curvature(K) and horizontal deformation (ε) are 0.640mm/m, 0.012×10-3/m and 0.503mm/m, which lower than the structures and buildings objects protection level and the allowable deformation value corresponding. The groundsubsidence and movement induced by transition from open pit to underground mining will don’t endanger the buildings and structures located at ground, which provide a theoretical basis for prediction and safety analysis of Xinqiao Mine’s ground subsidence.Cemented backfilling performance of yellow phosphorus slagYang Li 135501018Abstract: Laboratory experiments about feasibility of cemented backfilling with yellow phosphorus slag, including physical-mechanical properties and chemical compositions, optimized proportion, cemented mechanism, was carried out to make good use of yellow phosphorus slag, tackling with the environment and safety problems of those piled outdoors as well as geological hazards and high cost issues during the mining processof Kaiyang Phosphorus Mine Group, Guizhou. The results show that, yellow phosphorus slag, possessing a certain potential cemented properties, can be used as Portland cement substitute. Adding quicklime, hydrated lime and other alkaline substances can deal with the high residual phosphorus of yellow phosphorus slag and phosphorousgypsum, improving the initial strength of cemented backfilling body of yellow phosphorus slag and phosphorousgypsum. Based on the initial strength requirements, the recommend proportions of mass ratio are 1:1 (yellow phosphorus slag: phosphor gypsum), 1:4:10 (Portland cement: yellow phosphorus slag: phosphor gypsum) and 1:4:10 (ultrafine powder: yellow phosphorus slag: phosphor gypsum), with 5% of hydrated lime addition, 60% of mass fraction of solid and good rheological properties.Ca(OH)2is the activating agent of hydration reaction of yellow phosphorus slag and the cemented process involves hydration stage, solidifying stage and strength stage. The hydration reaction velocity of yellow phosphorus slag, Portland cement and ultra-fine powder speeds up, with the stability of cemented microstructure and initial strength also increasing.Wear mechanism and serious wear position of casing pipein vertical backfill drill-holeLiu Enyan135501019Abstract: Vertical backfill drill-hole is usually a key project in an underground mine with backfill method and can be easily damaged by impact of backfill slurry. Observation of the damaged vertical backfill drill-holes in Jinchuan Nonferrous Metal Corporation (JNMC), Gansu Province, China, given by a digital drill-hole video camera, indicated that there usually exist serious wear zones in casing pipe in vertical backfill drill-hole (CVBH). It was suggested that serious wear position of CVBH should be located at an interface between air and solid−liquid mixture within CVBH. Backfill slurry falls freely and impacts the wall of CVBH near the interface with great momentum and energy coming from high speed free fall of backfill slurry. The depth of serious wear position of CVBH, i.e., free fall height of backfill slurry in CVBH, can be estimated by the height of vertical backfill drill-hole, the length of horizontal pipeline, the density of slurry and the hydraulic gradient of pipeline system. A case study indicated that the estimation equation of serious damage depth of CVBH was of enough accuracy and was helpful for daily maintenance and management of vertical backfill drill-hole.Risk Assessment on Blocking of Filling Pipeline Based on UncertaintyMeasurement TheoryWANG Shi135501020Abstract：In order to forecast the difficult degree on filling pipeline blocking of filling system in deep mine, the assessment model of filling pipeline blocking was established on the basis of the uncertainty measurement theory. Ten evaluation indexes were selected as the discriminant ones of the uncertainty measurement model. The uncertainty measurement function of each index was obtained based on the in-situ data. The information entropy theory was used to calculate the weight of each discriminant index,and the predictive value of filling pipeline blocking was finally achieved using the rules of credible recognition criteria. The results show that the four evaluation objects are Longshou mine of Jinchuan company, Dahongshan copper mine, Hedong gold mine, and Xincheng gold mine, and the risk grades of them are respectively Ⅱ, Ⅲ, Ⅳ, and Ⅲ. The influence of evaluation system versus the evaluation indexes can be comprehensively considered by the uncertainty measurement theory, which is quantitatively calculated.Stability analysis and comprehensive treatment methods of landslides under complex mining environment—a case study of Dahulandslide from Linbao HenanDai Bing 135501021ABSTRACT：A case study of Dahu landslide from Linbao Henan in China was discussed in this paper. Based on various kinds of basic data, the 3D numerical model of a geological structure which possesses all kinds of information including the mechanical characteristics and the geometrical parameters of geological discontinuities were known from previous works. Thus, both the whole geological structure and all kinds of geological components involved in a slope can be visualized on computer, the complicated analysis and calculation can be then carried out easily and effectively. Firstly, the combination of 3D numerical model with some classical theories in slope stabilization can easily provide the present stability factor. Then according to monitoring data of the total station, the potential sliding trends are analyzed if landslides do not occur. Secondly, there are a number of uncertainties on the factors of coupled disaster forming, such as, rainfall, earthquake, and mined-out area. The unascertained mathematics theory is applied to the stability comprehensive analysis. It shows four landslide bodies get to be at unstable state if there are some inducements. Thirdly, sliding distance and movement scope were predicted if landslides occur. On the basis of the analysis above, the treatments of the landslide body called isolated method of culvert are proposed. It has solved the contradiction of landslide and mining radically, and provides important technical assurance for safety and sustainable development of mine.Simple discussion on filling theory and technologyGuoHongquan135501022Abstract：The development situation of the cutand fillmethod athome and abroad is presented andits advantages are also described such ashigh safety, high recovery ratio and smalldestruction to ecologicenvironmenton ground surface. Applicable condition and developmentorientation of the dry fillingmethod, hydraulic sand fillingmethod, cemented fillingmethod and fillingmethod arediscussed.It thinksthatwith progress ofscience and technology, the cutand fillmethodwillbecome a foremostminingmethod in undergroundmining ofdeposit.Establishment of Comprehensive Emergency Management Systemfor Campus EmergenciesSong Qing-hua 135501024Abstract:Because of social transformation, expansion of university enrollment and introduction of other service industries made campus potential safety hazard more complex. Campus emergencies are increasing in frequency and often occur in different forms, which have aroused widely public attention. Campus emergency has the features of social sensitivity, subject activeness, loss additive, as well as showing the characteristics of general emergency, thus abruptness, uncertainty, destructiveness, derivative, diffusivity, sociality. Apparently, traditional safety control system is far from meeting the requirements of current campus security situation, deep reformations for campus security are needed. China’s policy for emergency management is called “one plan and three systems” (representing emergency response plan and organizational system, mechanism system, legal system) had been made into practice in many domains and helped improve their security. It is found that emergency management will be effective and efficient only by: firstly, bringing into play the effort of the whole society (including not only school, educational system, family, students that have direct correlation with emergency, but also media, transport agency, hospital, public security and other social organizations that areindirectly associatedwith emergency) and secondly, considering the whole life cycle of emergency (including four time periods, thus no emergency, before the emergency, during the emergency and after the emergency) to minimize the resulted loss.Based on the “one plan and three systems” policy and with the intention of controlling emergency from a time-space perspective, the idea of establishing the Comprehensive Emergency Management System (CEMS) for campus emergencies is put forward. It is rational to expect that there will be resistance to the system’s implement ation for economical restriction or lack of safety awareness, so more detailed consideration is necessary for the system’s eventual accomplishment.3-D Numerical Analysis On The RightOpportunity Of Support In SoftRock RoadwayGUI Rong 135501025Abstract: An analysis was made on the soft rock of Yunling tunnel by using the finite element software ABAQUS.The changes of the displacement, stress and plastic zone during the process of construction was analyzed.And using the way to get the right opportunity of support in the soft rock. It is validated that the method is correctusing the monitoring data and the method will be significant for engineering practicability.Features of pipe transportation of paste-likebackfilling in deep mineYang Jiang 135501027Abstract：Based on the pipe transportation of paste-like backfilling system of a certain deep coal mine, dynamics process was simulated and analyzed. A two-dimension dynamic model of extraordinary deep and lone pipe was built by GAMBIT, on the base of which, simulation was done by implicit solver of FLUENT 2ddp. The results show that hydraulic loss of pipe transportation is less than the pressure produced by gravity which means backfilling material can flow by itself; when the inlet velocity is 3.2m/s, the maximumvelocity of 4.10m/s isat the elbow and the maximum velocity in the horizontal pipe is 3.91m/s, which are both sensible to meet the stability requirement. Results of the simulation were proved reliable by the residual monitor plotting of related parameter, so it’s concluded that the system of pipe transportation is safe and reliable.Research on heavy metals pollution in soil along the ortransportationroadsideLi Xiaoyan 135501028ABSTRACT：This paper introduces the main sources and transmission of heavy metal pollution in the ore transportations roadside soil and the detection methods of heavy metals in the soil, and analysis the influence degree of the soil polluted by heavy metals according to the main evaluation standards at this stage. But the present study lack of quantitative impact of heavy metals and can not highlight the defect effects of heavy metals on the biological activity of certain proportion evaluation standard.Experimental investigation on the energy-saving diffuser of a mainfanLi Gang 135501029Abstract: The main fan diffuser in a coal mine is an energy-recycling equipment with a dynamic energy loss for the main fan. Engineering practices and related researches show that the body structures of three types of diffusers are irrational. To solve the problem, an energy-saving diffuser is designed on the basis of the velocity potential theory. Under conditions of inlet velocity from 7 m/s to 32 m/s, 7 condition experiments using the energy-saving diffuser of 2.31 AER (area-enlarging ratio) and 5 condition experiments using the energy-saving diffuser of 2.00 AER were conducted. Through a comparative analysis of the experiments, the results show that the COP (coefficient of performance) of the energy-saving diffuser of 2.31 AER is better than that of the energy-saving diffuser of 2.00 AER.Research of the relation of Campus Environment Design toIdeological educationCao Zhiwei 135501031Abstract: Campus environment is not optimistic in our country, outstanding performance in many ways. Among all of these, the spiritual emptiness is behaved most obvious, in conclusion，there is lack of cultural connotation.The subject that how to educate and govern the inferior students is facing for the ideological workers in college.In this paper, through the study of ideological and political education interaction relationship between the campus environment，clarify the meaning and value of the campus environment design.Analysis the function of ideology education to the campus environment design.Campus environment design research is based on the function of the ideological education helps to promote campus environment.We should make the ideological work become a new magic weapon which can better educatestudents.The Research of Hospital Logistics Management Evaluation SystemBased on MORTTeng Yun 135501032Abstract: This article tries to apply the MORT（Management Oversight and Risk Tree）method into the evaluation of Hospital logistics management,construct hospital logistics management evaluation system with the consideration of the practice ofXiangya hospital, Central South University in the process of actual situation, and eventually puts forward a new method of hospital logistics management, which will provide a new idea of hospital logistics management evaluation and quality supervision and management.Study on the Early Warning System of Coal and Gas OutburstPengHuaide 135501035Abstract: Based on the mechanism of coal and gas outburst, Comprehensively analyzing characteristics of coal and gas outburst, according to collection, summarization and analysis of affecting factors of coal and gas outburst, the principles of selecting early warning indicators were explored. The early warning model of coal and gas outburst was established by SPSS statistical analysis, based on the indicators of the gas density, gas desorption and the initial velocity of drilling gas emission. The early warning system of coal and gas outburst was simulated by Logistic regression analysis. Summarizing the data of coal and gas outburst factors in Lu’an group Tunliu mine, a query database was created inSQL Server to achieve information data query functions of coal and gas outburst. The multivariate information coupled warning was conducted according to the selecting early warning indicator system, and the early warning level was divided with the result of early warning. Based on the visualization capability of ArcGIS, the corresponding warning level was displayed in the area of the drawing of Lu’anTunliu mine to realize the role of visualization of early warning. The establishment of the early warning system is a new technical way to the early warning management of coal and gas outburst, and can provide guarantee to the coal and gas outburst prevention.Research on intrinsic safety method for open-pit miningZhengKaihuan 135501036Abstract：Open-pit mining is a complicated system engineering which has many unsafe factors like large amount of workers,dispersive workplaces,bad natural condition and involute working environment.It is necessary to seek an effective way to realize intrinsic safety for open-pit mining. In order to promoteintrinsic safety of open-pit mining system, intrinsic safety method out of safety theory and practical mining production are combined to form a fullimplementation system of intrinsic safety method for open-pit mining. Then the main implementation contents are systematicallyanalyzed. It is thought that intrinsic。