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International Journal of Coal Science & Technology 2020年第1期7卷 208-215页

作者： Lei Li Fengming Li Yong Zhang Daming Yang Xue Liu School of Energy and mining Engineering China University of Mining and Technology(Beijing)Beijing 100083China China Coal Research Institute Beijing 100013China China Coal Technology&Engineering Group(CCTEG)Central Research Institute Beijing 100013China College of mining and Geomatics Engineering Hebei University of Engineering.Handan 056000China

To study the heights of the caved zone and water-conducting fracture zone in backfill mining,the failure mechanism of strata during backfill mining was analyzed,and a method for determining the heights of the two zones was proposed based on key strata *** movement and failure regularity of the strata above the backfilling panel were revealed through numerical *** the geologic conditions of the CT101 backfilling panel,the height of the fracture zone was determined using the proposed method along with empirical calculation,numerical simulation,and borehole *** results of the new calculation method were similar to in situ *** traditional empirical formula,which is based on the equivalent mining height model,resulted in large errors during *** findings indicate the reliability of the new method and demonstrate its significance for creating reference data for related studies.

关键词： backfill mining Strata failure Key strata Heights of caved and fracture zones

Dynamic disaster control of backfill mining under thick magmatic rock in one side goaf:A case study

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Journal of Central South University 2020年第10期27卷 3103-3117页

作者： XUE Yan-chao XU Tao WASANTHA P L P YANG Tian-hong FU Teng-fei Center for Rock Instability and Seismicity Research Northeastern UniversityShenyang 110819China Key Laboratory of Ministry of Education on Safe mining of Deep Metal Mines Northeastern UniversityShenyang 110819China College of Engineering and Science Victoria UniversityMelbourneAustralia

In order to explore the control effect of backfill mining on dynamic disasters under special geological mining conditions of overlying thick magmatic rock(TMR),a three-dimensional numerical model of a panel of one side goaf in Yangliu coal mine with double-yield backfill material constitutive model was *** simulation results were then compared with field monitoring *** dynamic disaster control effect of both caving and backfill mining was analyzed in three different aspects,i.e.,displacement field,stress field and energy *** results show that in comparison to the full caving mining method,the bearing capacity of the goaf after backfilling was enhanced,the backfill mining can effectively reduce the stress and energy accumulated in the coal/rock body,and the backfill mining eliminates the further moving space of TMR and prevents its sudden *** TMR fracture,the subsidence displacement of TMR was reduced by 65.3%,the front abutment stress of panel decreased by 9.4%on average and the high energy concentration zone around panel was also significantly ***,the results of this study provide deeper insights into the control of dynamic disasters by backfill mining in mines.

关键词： backfill mining thick magmatic rock one side goaf dynamic disaster numerical simulation

Ground movement resulting from underground backfill mining in a nickel mine(Gansu Province,China)

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Ground movement resulting from underground backfill mining i...

Ground subsidence induced by backfill-mining of a nickel mine and development forecasts

中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： Fengshan Ma Haijun Zhao Renmao Yuan Jie Guo Key Laboratory of Shale Gas and Geoengineering Institute of Geology and GeophysicsChinese Academy of Sciences Institute of Geology China Earthquake Administration

Underground backfill mining is a complex and high-cost mining technique,which was designed to control ground pressure and prevent rock mass movement and ground ***,the results were not always as good as expected in *** paper addresses a case of ground movement induced by backfill mining in a nickel mine,*** with geological investigation and ground monitoring,emphasis was put on the analysis of ground movement and interpretation of the deformation and *** results showed that a ground depression was formed at the hanging wall surface of the *** the end of 2013,the maximum subsidence reached 2,404 mm and accompanied by the rapid development of ground *** monitored ground movement corresponded well with the underground goaf and the distribution of the ground *** also found that the seriously deformed and damaged tunnels were exactly located in the plane projection of the subsidence *** addition,this study suggested that the high-level in situ stresses strengthened the mechanical strength of the surrounding rock mass and affected the overriding displacements in the wall rocks,thereby resulting in lower magnitude of vertical subsidence but greater expansion of horizontal deformation of the ground.

关键词： Ground movement Ground fissures Monitoring backfill mining

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Ground subsidence induced by backfill-mining of a nickel min...

Experimental study on the mechanical properties and consolidation mechanism of microbial grouted backfill

中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： F.S.MA,H.J.ZHAO,Y.M.ZHANG & J.GUO Key Laboratory of Engineering Geomechanics,Institute of Geology and Geophysics,Chinese Academy of Sciences, PO Box 9825,Beijing 100029,China

Based on geological investigations and GPS monitoring data,this paper presents ground movement phenomena and characteristics for Jinchuan Nickel Mine,*** results show that ground subsidence occurred with increasing mining *** greatest accumulated subsidence reached 1287.5 mm between 2001 and 2008,and 37 considerable fissures were found at the ground *** establishing a mining-geological model,and by applying a numerical computation method,a short-term forecast of rockmass movement is *** results show that the rate of ground subsidence and deformation will intensify further,and the distribution of subsidence and degree of damage to the mine roadway and shaft induced by ground subsidence and deformation will also extend in the following several years.

关键词： ground subsidence rockmass movement backfill mining metal mine forecast

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International Journal of mining Science and Technology 2022年第2期32卷 271-282页

作者： Xuejie Deng Yu Li Fei Wang Xiaoming Shi Yinchao Yang Xichen Xu Yanli Huang Benjamin de Wit School of Energy and mining Engineering China University of Mining and Technology-BeijingBeijing 100083China Kailuan(Group)Limited Liability Corporation Tangshan 063018China Department of Civil Engineering Tsinghua UniversityBeijing 100084China School of mining and Geology Engineering Xinjiang Institute of EngineeringUrumqi 830023China Norman B.Keevil Institute of mining Engineering University of British ColumbiaVancouver V6T 1Z4Canada

backfill mining technology is the practice of returning waste materials underground for both disposal and geotechnical stability,however,a challenge with current technologies is that they commonly require cement-based binders which have a relatively high environmental *** alternatives to cement-based binders can improve environmental performance and this paper proposes microbial grouted backfill(MGB)as a potential *** this paper,the effects of the cementation solution concentration(CSC),volume ratio of bacterial solution to cementation solution(VRBC),particle sizes of the aggregates,and the number of grouting batches on the mechanical properties of MGB are *** experimental results show that MGB strength increased,up to a peak value,as CSC was increased,before decreasing as CSC was increased *** results also show that MGB strength increased,up to a peak value,as VRBC decreased,before decreasing as the VRBC was decreased *** peak strength was achieved at a CSC of 2 mol/L and a VRBC of 1:*** strength of the MGB also increased as the number of grouting batches *** MGB samples showed the highest UCS,25.12 MPa,at particle sizes of 0.2 to 0.8 mm,while full(non-graded)MGB samples displayed mean UCS values ranging from1.56 MPa when the maximum particle size was 0.2 mm,up to 13 MPa when the maximum particle size was 1.2 *** samples are consolidated by the calcium carbonate that is precipitated during microbial metabolism,and the strength of MGB increases linearly as calcium carbonate content *** calcium carbonate minerals produced in MGB materials are primarily calcite,with secondary amounts of vaterite.

关键词： Microbial grouted backfill Mechanical properties Consolidation mechanism Microbial induced carbonate precipitation Grouting backfill mining

Random gravel model and particle flow based numerical biaxial test of solid backfill materials

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International Journal of mining Science and Technology 2013年第4期23卷 463-467页

作者： Zhan Liu Nan Zhou Jixiong Zhang State Key Laboratory of Geomechanics & Deep Underground Engineering China University of mining(&)Technology Xuzhou 221008 China School of Mines China University of Mining & Technology Xuzhou 221008 China

Fully mechanized coal mining with backflling(FMCMB)has become a major solution of‘‘green mining’’.The mechanical properties of backfll materials are key factors of ground control in FMCMB *** study the strength behaviors of the solid backfll materials,we developed a method of generating random gravel model by using computational geometry algorithms,then coded the generating method into a program with MATLAB software,and implemented several numerical biaxial tests under different confning stresses by using a generated random gravel model and the Particle Flow Code *** deviatoric stress,post-peak softening,initial contraction and dilation and the relations between them and confning stress can be *** the initial elastic modulus of the samples,Poisson’s ratio,frictional angle and cohesion can be derived from the numerical biaxial test *** results indicate a good feasibility study of mechanical properties of the solid backfll materials by random gravel model and particle flow based numerical biaxial test.

关键词： backfill mining backfill materials Biaxial test Numerical simulation PFC

A roof model and its application in solid backfilling mining

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International Journal of mining Science and Technology 2017年第1期27卷 139-143页

作者： Ju Feng Huang Peng Guo Shuai Xiao Meng Lan Lixin State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining&TechnologyXuzhou 221116China

Through changing the axial load on backfilling material compaction test to reflect different overlying strata pressure on backfilling material, the stress-strain relations in the compaction process of backfilling material under the geological condition can be obtained. Based on the characteristic of overlying strata movement in backfill mining, a model of roof thin plate is established. By introducing the stress-strain relation in compaction process into the model and using RIZT method to analyze the bending deformation of roof, the bending deflection and stress distribution can be obtained. The results show that the maximum roof subsidence and maximum tensile stress occurring at the center are 255 mm and5 MPa, respectively. Tensile fracture of roof under the geological condition of Dongping Mine did not occur. The dynamic measurement results of roof in Dongping Mine verify the theoretical result from the aforementioned model, thereby suggesting the roof mechanical model is reliable. The roof thin plate model based on the compaction characteristic of backfilling material in this study is of importance to research on backfill mining theories and application of backfilling material characteristics.

关键词： backfill mining backfilling material Compaction characteristic Thin plate model

Galerkin solution of Winkler foundation-based irregular Kirchhoff plate model and its application in crown pillar optimization

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Journal of Central South University 2016年第5期23卷 1253-1263页

作者：彭康尹旭岩尹光志许江黄滚殷志强 State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University Chongqing 400044 China State Key Laboratory of Resources and Safe mining (CUMT) Xuzhou 221116 China College of Resources and Environmental Science Chongqing University Chongqing 400030 China Key Laboratory of Deep Coal Mine Excavation Response & Disaster Prevention and Control of Anhui Province (Anhui University of Science and Technology) Huainan 232001 China

Irregular plates are very common structures in engineering,such as ore structures in *** this work,the Galerkin solution to the problem of a Kirchhoff plate lying on the Winkler foundation with two edges simply supported and the other two clamped supported is *** transformation technique is used during the solving process so that the solution is suitable to irregular shaped *** mechanical model and the solution proposed are then used to model the crown pillars between two adjacent levels in Sanshandao gold mine,which uses backfill method for mining *** that,an objective function,which takes security,economic profits and filling effect into consideration,is built to evaluate design *** optimizations for crown pillars are finally conducted in both conditions that the vertical stiffness of the foundation is known and *** procedure presented in the work provides the guidance in thickness designing of complex shaped crown pillars and the preparation of backfill materials,thus to achieve the best balance between security and profits.

关键词： irregular kirchhoff plate Galerkin method backfill mining crown pillars thickness optimization

Ground subsidence mechanism of a filling mine with a steeply inclined ore body

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山地科学学报(英文) 2023年第8期20卷 2358-2369页

作者： LI Guang LIU Shuai-qi MA Feng-shan GUO Jie HUI Xin Key Laboratory of Shale Gas and Geoengineering Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Innovation Academy for Earth Science Chinese Academy of SciencesBeijing 100029China Economics&Technology Research Institute China National Petroleum CorporationBeijing 100011China China Academy of Industrial Internet Beijing 100102China

Long-term field monitoring finds that serious surface subsidence can still occur even if the high strength cemented fill method is *** the results of numerical simulations with global position system(GPS)monitoring,we took a typical filling mining mine with a steeply inclined ore body as an example,and explored its ground subsidence *** results show that the ground subsidence caused by the mining of steep ore body is characterized by two settlement centers and a significantly uneven spatial distribution,which is visibly different from ground subsidence characteristic of the coal *** subsidence on the hanging wall is much larger than that on the footwall,and the settlement center tends to move to the hanging wall with the increase of mining *** backfill improves the strength and surrounding rock bearing capacity,which leads to a lag of about 3 years of the ***,under the actions of continuous and repeated mining disturbances,the supporting effect of the backfill can only reduce the amplitude of the deformation,but it cannot prevent the occurrence of settlement.

关键词： Ground subsidence backfill mining Steeply inclined ore body GPS monitoring Rock mass movement model