检索结果-南通市图书馆

Modeling and simulation of strata movement for protective seam mining with large interburden

在线全文

学校读者我要写书评

暂无评论

Journal of Coal Science & Engineering(China) 2009年第1期15卷 46-49页

作者： SONG Chang-sheng LI De-hai LI Hua-min School of Energy and Science Engineering Henan Polytechnic University Jiaozuo 454000 China Henan Education Department Engineering ＆ Technology Research Center for Coal and Gas Safety Mining Jiaozuo 454000 China

Based on simulated material scale modeling and numerical simulation, the protective seam mining method was conducted at one coal mine. After extracting the No.15seam, the overlying strata movement and the deformation of the No.9-10 protected seamwere studied. The experiment results show that it is feasible to destress the protectedseams with large interburden thickness. When the face had advanced 200 m from thesetup room, the No.9-10 seam was fully destressed, resulting in easy gas drainage in thedestressed zone. Recommendations on mining sequence of multiple seams mining in thesame coal areas were made.

关键词： large interburden protective seam mining strata movement destressed

ANALYTICAL SOLUTION WITH SYSTEM METHOD FOR THE MODEL OF ROCK strata movement AS COMPLEX LAMINATED PLATES

在线全文

学校读者我要写书评

暂无评论

Journal of Coal Science & Engineering(China) 1999年第2期5卷 39-45页

作者：赵晓东宋振骐 ShandongUniversityofScienceamdTechnology Tai＇an271019 ShandongUniversityofScienceamdTechnology Tai＇an271019

Starting from the basic equation of elastic mechanics, without any additional hypotheses of displacement or stress model, just introducing state space and state equation, the model of rock strata movement as complex laminated plates is presented. In addition, using displacement as a basic unknown quantity, the accurate analytical series solution for the problem of strata movement induced by extraction of horizontal seam is worked out when crosswise isotropic elastic layers are in sliding contact condition. A new approach is put forward to solve the complicated system of mining subsidence.

关键词： strata movement complex laminated plate state space state equation

movement scope of strata based on fuzzy BP neural network in underground metal mines

在线全文

学校读者我要写书评

暂无评论

Journal of University of Science and Technology Beijing 2005年第1期12卷 6-11页

作者： YanhuiWang SijingCai WeidongSong SchoolofTraffic＆Transportation BeijingJiaotongUniversityBeijing100044China CivilandEnvironmentEngineeringSchool UniversityofScienceandTechnologyBeijingBeijing100083China

A prediction method of strata movement in underground metal mines is put forward, in which fuzzy BP neural network is applied. The results show that there is a strong nonlinear relation between the selected factors and strata movement angle, the anticipant and the actual output results are very similar. It is proved that the numerical value of movement angle is correlated with the selected factors in theory. The scope of strata and surface movement due to mining can be predicted. This research provides a thought to study the movement scope of strata due to mining.

关键词： fuzzy BP neural network strata movement underground metal mine

Research on the relation between rock burst and movement of strata and surface

在线全文

学校读者我要写书评

暂无评论

Journal of Coal Science & Engineering(China) 2007年第3期13卷 314-318页

作者：李法柱郭惟嘉孔令海刘进晓 Geting Colliery Zibo Mining Group Jining 272053 China Key Laboratory of Mine Disaster Prevention and Control Shandong University of Science and Technology Qindao 266510 China

Large-scale bed separation in bending strip upside cranny strip was brought by un-consistency of overlying strata subsidence movement due to under surface mining. Different characteristic of movement and deformation of overlying strata and surface include periodic caving of bed separation interspaced along with work face mining. Conglomerate rock layer movement is the main power fountain of rock burst on the basis of locale observation. And rock burst moves periodically adapted to movement of deep conglomerate rock layer which had similar characteristic with main roof. Practice indicates this method that forecasting and prediction using correlation information of movement of strata and surface is feasible and has reference meaning for similar stope.

关键词： strata movement overlying strata bed separation rock burst forecast and prediction

SIMULATION OF strata movementS DUE TO UNDERGROUND MINING USING AN AUTOMATED MEASUREMENT SYSTEM FOR EQUIVALENT MATERIAL MODELING FACILITY

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Coal Science & Engineering(China) 1996年第1期2卷 10-15页

作者：张玉卓 YoginderP.Chugh CentralCoalMiningResearchInstitute100013 SouthernIllinolsUniversityatCarbondale USA

strata movement simulation was conducted in an equivalent material modeling facility developed by the Department of Mining Engineering, Southern Illinois University at Carbondale, under U. S. Bureau of Mines contracts. An innovative displacement measurement system called videogrammetric system was developed and utilized for recording, measuring and analyzing the deformation and failure process of the models. A room and pillar mining and a longwall mining prototypes were studied in the modeling. Study found that weak floor of coal seam plays an important role in pillar stability and therefore the overburden movements.

关键词： equivalent material modeling strata movement videogrammetric system

Mining pressure monitoring and analysis in fully mechanized backfilling coal mining face-A case study in Zhai Zhen Coal Mine

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 2015年第5期22卷 1965-1972页

作者：张强张吉雄康涛孙强李伟康 Key Laboratory of Deep Coal Resource Mining of Ministry of Education(School of Mines China University of Mining & Technology)

Fully mechanized solid backfill mining(FMSBM) technology adopts dense backfill body to support the roof. Based on the distinguishing characteristics and mine pressure control principle in this technology, the basic principles and methods for mining pressure monitoring were analyzed and established. And the characteristics of overburden strata movement were analyzed by monitoring the support resistance of hydraulic support, the dynamic subsidence of immediate roof, the stress of backfill body, the front abutment pressure, and the mass ratio of cut coal to backfilled materials. On-site strata behavior measurements of 7403 W solid backfilling working face in Zhai Zhen Coal Mine show that the backfill body can effectively support the overburden load, obviously control the overburden strata movement, and weaken the strata behaviors distinctly. Specific performances are as follows. The support resistance decreases obviously; the dynamic subsidence of immediate roof keeps consistent to the variation of backfill body stress, and tends to be stable after the face retreating to 120-150 m away from the cut. The peak value of front abutment pressure arises at 5-12 m before the operating face, and mass ratio is greater than the designed value of 1.15, which effectively ensures the control of strata movement. The research results are bases for intensively studying basic theories of solid backfill mining strata behaviors and its control, and provide theoretical guidance for engineering design in FMSBM.

关键词： fully mechanized solid backfill mining(FMSBM) strata movement strata behavior mining pressure monitoring

Characteristics of Gas Emission at Super-Length Fully-Mechanized Top Coal Caving Face

在线全文

学校读者我要写书评

暂无评论

Journal of China University of Mining and Technology 2007年第4期17卷 447-452页

作者： XU Jia-lin YU Bei-jian LOU Jin-fu WANG Dong-ping State Key Laboratory of Coal Resource and Mine Safety Xuzhou Jiangsu 221008 China School of Mineral and Safety Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China Yangquan Coal Group Yangquan Shanxi 045008 China

Characteristics of gas emission at the K8206 working face in the Third mine of the Yangquan Coal Group were investigated. The effects of strata movement,advancing velocity of working face,production capacity of working face and gas extraction capability of strike high-level entry on gas emission at K8206 working face were analyzed. A regression equation,reflecting the relationship between relative gas emission rate and the production capacity of work-ing faces,was established. Another regression equation showing the relationship between the gas emission rate from adjacent layers when the working face was advancing for one metre and advancing velocity was derived. It can be con-cluded that,1) the amount of gas emitted at the K8206 working face is far greater than that of ordinary top coal caving faces with a dip length of 180-190 m; 2) the dynamic process of gas emission from adjacent layers during the initial mining stage is controlled by the movement of key strata; 3) the amount of gas emitted that needs to be forced out by air is greatly affected by the capability of gas extraction; 4) when the advancing velocity is between 3.5-5.5 m/d or when the output is up to 8-12 kt/d,the gas emission from adjacent layers is almost constant.

关键词： super-length fully-mechanized top coal caving face characteristics of gas emission strata movement

Study of “3-Step Mining” Subsidence Control in Coal Mining Under Buildings

在线全文

学校读者我要写书评

暂无评论

Journal of China University of Mining and Technology 2007年第3期17卷 316-320页

作者： GUO Guang-li ZHA Jian-feng WU Bin JIA Xin-guo School of Environment ＆ Spatial Informatics China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Mining subsidence damage is the main factor of restricting coal mining under buildings. To control or ease effectively the degree of mining subsidence and deformation is essential to resolve this problem. Through analyzing both advantages and disadvantages of some technologies such as mining with stowing, partial extraction and grouting in separated beds of overburden, we used the principle of load replacement and propose a “3-step mining” method, a new pattern of controlling mining subsidence, which consists of： strip mining, i.e. grouting to fill and consolidate the caving zone and retained strip pillar mining. The mechanism of controlling mining subsidence by using the “3-step mining” pattern is analyzed. The effect of the control is numerically simulated. The preliminary analysis shows that the “3-step mining” can effectively control ground subsidence and deformation. By using this method, the ground subsidence factor can be controlled to a value of about 0.25. Coal recovery can reach 80%-90%. Coal mining without removing surface buildins can be realized and the economic loss resultin from round subsidence can be greatly reduced.

关键词： subsidence control strata movement ground movement mining under buildings

Surface movement Regularity of Super-Wide Mining Face With Top-Coal Caving

在线全文

学校读者我要写书评

暂无评论

Journal of China University of Mining and Technology 2005年第1期15卷 68-71页

作者： RENRun-hou SchoolofResourcesandSafetyEngineering ChinaUniversityOfMining＆TechnologyBeijing100083

No.4326 super-wide panel of Wangzhuang Coal Mine ( in which the fully-mechanized top-coal caving longwall mining method was used) was monitored for dynamic characteristic of surface movement. The dynamic surface movement in and after mining was predicted by using the Mining Subsidence Prediction System. The results indicate that after mining, the surface above the super-wide panel reaches a state of full subsidence, making the No.309 national highway above the panel be located on the flat bottom of the subsidence basin so that the influence of mining activity in both sides of 4326 panel on the national highway is the smallest.

关键词： super-wide mining face with top-coal caving surface subsidence strata movement ground pressure