|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Mechanics of rib spalling of high coal walls under fully-mechanized mining显示文摘为了解决高煤的肋骨 spalling 的问题,围在充分使机械化(HCWFM ) 矿,我们使用了损坏力学的原则分析煤墙肋骨 spalling。煤墙肋骨 spalling 是的结果表演到某个度,发展的宏表演微裂缝。我们造了一个机械模型模仿损坏到煤墙的前面,执行了损坏参数的理论计算,在煤墙肋骨 spalling 上分析了采矿高度,原来的裂缝,缝接强度,水平应力,煤墙的垂直排水量和另外的参数的效果,它与我们的地大小和数字模拟的结果一致很好。控制煤墙肋骨 spalling 的钥匙是在煤墙中控制裂缝的开发。加速推进工作的脸的速度,改进支持的设定的负担和警卫板的水平力量,加强煤围并且另外的技术措施能有效地在 HCWFM 脸减少煤墙和控制煤墙肋骨 spalling 的损坏的度。 | Yuan Yong Tu Shihao Wu Qi Ma Xiaotao Tu Hongsheng Sun Lulu | 2011 | Mining Science and Technology2011，21，1： | 9 |
| 2 | Overburden fracture evolution laws and water-controlling technologies in mining very thick coal seam under water-rich roof显示文摘Considering the danger of water inrush in mining very thick coal seam under water-rich roof in Majialiang Coal Mine,the universal discrete element(UDEC)software was used to simulate the overburden fracture evolution laws when mining 4#coal seam.Besides,this study researched on the influence of face advancing length,speed and mining height on the height of the water flowing fractured zones(HWFFZ),and analyzed the correlation of face advancing length and change rules of aquifer water levels and goaf water inflow.Based on those mentioned above,this research proposed the following water-controlling technologies:draining the roof water before mining,draining goaf water,reasonable advancing speed and mining thickness.These water-controlling technologies were successfully used in the feld,thus ensured safely mining the very thick coal seam under water-rich roof. | Zhang Youxi Tu Shihao Bai Qingsheng Li Jianjun | 2013 | International Journal of Mining Science and Technology2013，23，5： | 8 |
| 3 | Hydraulic support crushed mechanism for the shallow seam mining face under the roadway pillars of room mining goaf显示文摘While the fully-mechanized longwall mining technology was employed in a shallow seam under a room mining goaf and overlained by thin bedrock and thick loose sands, the roadway pillars in the abandoned room mining goaf were in a stress-concentrated state, which may cause abnormal roof weighting, violent ground pressure behaviours, even roof fall and hydraulic support crushed(HSC) accidents. In this case,longwall mining safety and efficiency were seriously challenged. Based on the HSC accidents occurred during the longwall mining of 3-1-2 seam, which locates under the intersection zone of roadway pillars in the room mining goaf of 3-1-1 seam, this paper employed ground rock mechanics to analyse the overlying strata structure movement rules and presented the main influence factors and determination methods for the hydraulic support working resistance. The FLAC3 D software was used to simulate the overlying strata stress and plastic zone distribution characteristics. Field observation was implemented to contrastively analyse the hydraulic support working resistance distribution rules under the roadway pillars in strike direction, normal room mining goaf, roadway pillars in dip direction and intersection zone of roadway pillars. The results indicate that the key strata break along with rotations and reactions of the coal pillars deliver a larger concentrated load to the hydraulic support under intersection zone of roadway pillars than other conditions. The ‘‘overburden strata-key strata-roadway pillars-immediate roof' integrated load has exceeded the yield load that leads to HSC accidents. Findings in HSC mechanism provide a reasonable basis for shallow seam mining, and have important significance for the implementation of safe and efficient mining. | Wang Fangtian Duan Chaohua Tu Shihao Liang Ningning Bai Qingsheng | 2017 | International Journal of Mining Science and Technology2017，27，5： | 8 |
| 4 | System dynamics model of the support-surrounding rock system in fully mechanized mining with large mining height face and its application显示文摘Fully mechanized mining with large mining height(FMMLMH)is widely used in thick coal seam mining face for its higher recovery ratio,especially where the thickness is less than 7.0 m.However,because of the great mining height and intense rock pressure,the coal wall rib spalling,roof falling and the instability of support occur more likely in FMMLMH working face,and the above three types of disasters interact with each other with complicated relationships.In order to get the relationship between each two of coal wall,roof,floor and support,and reduce the occurrence probability of the three types of disasters,we established the system dynamics(SD)model of the support-surrounding rock system which is composed of'coal wall-roof-floor-support'(CW-R-F-S)in a FMMLMH working face based on the condition of No.15104 working face in Sijiazhuang coal mine.With the software of Vensim,we also simulated the interaction process between each two factors of roof,floor,coal wall and the support.The results show that the SD model of'CW-R-F-S'system can reveal the complicated and interactive relationship clearly between the support and surrounding rock in the FMMLMH working face.By increasing the advancing speed of working face,the support resistance or the length of support guard,or by decreasing the tipto-face distance,the stability of'CW-R-F-S'system will be higher and the happening probability of the disasters such as coal wall rib spalling,roof falling or the instability of support will be lower.These research findings have been testified in field application in No.15104 working face,which can provide a new approach for researching the interaction relationship of support and surrounding rock. | Yuan Yong Tu Shihao Zhang Xiaogang Li Bo | 2013 | International Journal of Mining Science and Technology2013，23，6： | 7 |
| 5 | Theoretical analysis on the deformation characteristics of coal wall in a longwall top coal caving face显示文摘Against the background of analyzing coal wall stability in 14101 fully mechanized longwall top coal caving face in Majialiang coal mine,based on the torque equilibrium of the coal wall,shield support and the roof strata,an elastic mechanics model was established to calculate the stress applied on the coal wall.The displacement method was used to obtain the stress and deformation distributions of the coal wall.This study also researched the influence of support resistance,protective pressure to the coal wall,fracture position of the main roof and mining height on the coal wall deformation.The following conclusions are drawn:(1) The shorter the distance from the longwall face,the greater the vertical compressive stress and horizontal tensile stress borne by the coal wall.The coal wall is prone to failure in the form of compressive-shear and tension;(2) With increasing support resistance,the revolution angle of the main roof decreases linearly.As the support resistance and protective force supplied by the face guard increases,the maximum deformation of the coal wall decreases linearly;(3) As the face approaches the fracture position of the main roof,coal wall horizontal deformation increases significantly,and the coal wall is prone to instability;and(4) The best mining height of 14101 longwall face is 3.0 m. | Bai Qingsheng Tu Shihao Li Zhaoxin Tu Hongsheng | 2015 | International Journal of Mining Science and Technology2015，25，2： | 5 |
| 6 | Rules of distribution in a plastic zone of rocks surrounding a roadway affected by tectonic stress显示文摘In order to study the rules of distribution in a plastic zone of rocks, surrounding a roadway, affected by tectonic stress, we first analyzed the mechanics of a roadway affected by tectonic stress and derived a theoretical formula for the plastic zone of rocks surrounding a roadway. We also analyzed the distribution characteristics of the plastic zone under different levels of tectonic stress, vertical pressure, cohesion and friction angle of the surrounding rock. Secondly, we used numerical simulation to analyze the range and shape features of the plastic zone of rocks surrounding the roadway, given different tectonic stress levels. Finally we used a rock drilling detector to carry out field measurements on the broken state of rock surrounding the roadway at the –700 substation and channels in the Xinzhuang mine of the Shenhuo mining area. Given the measured ground stress, we analyzed the relationship between tectonic stress and the distribution of this plastic zone. Our results show that the range of the plastic zone at the top and bottom of the roadway increases with an increase in tectonic stress and this increase is especially obvious at the roadway corner. | LU Yan TU Shihao | 2010 | Mining Science and Technology2010，20，1： | 5 |
| 7 | Mechanisms of support failure and prevention measures under double-layer room mining gobs——A case study: Shigetai coal mine显示文摘In the practice of mining shallow buried ultra-close seams,support failure tends to occur during the process of longwall undermining beneath two layers of room mining goaf(TLRMG).In this paper,the factors causing support failure are summarized into geology and mining technology.Combining column lithology and composite beam theory,the key stratum of the rock strata is determined.A finite element numerical simulation is used to analyze the overlying load distribution rule of the main roof for different plane positions of the upper and lower room mining pillars.The tributary area theory(TAT)is adopted to analyze the vertical load distribution of each pillar,and dynamic models of coal pillar instability and main roof fracture are established.Through key block instability analysis,two critical moments are established,of which critical moment A has the greater dynamic load strength.Great economic losses and safety hazards are created by the dynamic load of the fracturing of the main roof.To reduce these negative effects,a method of pulling out supports is developed and two alternative measures for support failure prevention are proposed:reinforcing stope supports in conjunction with reducing mining height,or drilling ground holes to pre-split the main roof.Based on a comprehensive consideration of economic factors and the two categories of support failure causes,the method of reinforcing stope supports while reducing mining height was selected for use on the mining site. | Defu Zhu Shihao Tu Hongsheng Tu Zhenqian Yang | 2019 | International Journal of Mining Science and Technology2019，29，6： | 4 |
| 8 | Mechanics of rib spalling of high coal walls under fully-mechanized mining显示文摘 | Yuan Yong Tu Shihao Wu Qi Ma Xiaotao Tu Hongsheng Sun Lulu | 2011 | Mining Science and Technology (China)2011，，1： | 2 |
| 9 | A high-sensitivity MEMS gravimeter with a largedynamic range显示文摘Precise measurement of variations in the local gravitational acceleration is valuable for natural hazard forecasting,prospecting,and geophysical studies.Common issues of the present gravimetry technologies include their high cost,high mass,and large volume,which can potentially be solved by micro-electromechanical-system(MEMS)technology.However,the reported MEMS gravimeter does not have a high sensitivity and a large dynamic range comparable with those of the present commercial gravimeters,lowering its practicability and ruling out worldwide deployment.In this paper,we introduce a more practical MEMS gravimeter that has a higher sensitivity of 8μGal/√Hz and a larger dynamic range of 8000 mGal by using an advanced suspension design and a customized optical displacement transducer.The proposed MEMS gravimeter has performed the co-site earth tides measurement with a commercial superconducting gravimeter GWR iGrav with the results showing a correlation coefficient of 0.91. | Shihao Tang Huafeng Liu Shitao Yan Xiaochao Xu Wenjie Wu Ji Fan Jinquan Liu Chenyuan Hu Liangcheng Tu | 2019 | Microsystems & Nanoengineering2019，5，1： | 2 |
| 10 | Technology of back stoping from level floors in gateway and pillar mining areas of extra-thick seams显示文摘According to the special requirements of secondary mining of resources in gateway-and-pillar goaf in extra-thick seams of Shanxi, this paper presents a technical proposal of back stoping from level floors.Numerical simulation and theoretical analysis are used to investigate the compaction characteristics of cavities under stress as well as an appropriate mining height of the primary-mining layer based on different mining widths and pillar widths. For Yangjian coal mine, the mining thickness of the first seam during back stoping from level floor is determined to be 3 m, which meets the relevant requirements.Gateway-and-pillar goaf of a single layer has a range of influence of 9 m vertically. If gateway-and-pillar goaf occurs both in 9-1 and 9-5 layers, the range is extended to within 11.2 m. When the mining width of a gateway is less than 2 m or larger than 5 m, the gateway-and-pillar goaf in the upper layer of the primary-mining seam can be filled in and compacted after stoping. When the working face is 2 m away from the gateway and pillar before entering into it and after passing through it, the coal body under the gateway and pillar is subjected to relatively high stress. During mining of the upper layer, moreover, the working face should interlock the goaf in primary-mining layer for 20 m. | Tu Hongsheng Tu Shihao Zhang Xiaogang Li Zhaoxin Jia Shuai | 2014 | International Journal of Mining Science and Technology2014，24，2： | 2 |
| 11 | Evaluating pressure-relief mining performances based on surface gas venthole extraction data in longwall coal mines 显示文摘 | Zhang Cun Tu Shihao Bai Qingsheng | 2015 | Journal of Natural Gas Science and Engineering2015，24，： | 1 |
| 12 | Auxiliary transportation mode in a fully-mechanized face in a nearly horizontal thin coal seam显示文摘On fully-mechanized faces in nearly horizontal thin coal seams(NHTCS), the selection of the auxiliary transportation mode is difficult. Generally, auxiliary transportation mainly includes trackless or rail transportation. Combined with a familiar NHTCS fully-mechanized face, a multi-attribute decisionmaking model was set up for the decision. The index weight was objectively determined with the fuzzy number and entropy method. The priority order of auxiliary transportation modes was obtained from the Preference Ranking Organization Method for Enrichment Evaluation(PROMETHEE). The results show that: the net flow of the mode can be expressed by the function of the surrounding rock deformation of the roadway, the dimension of equipment and the thickness of the coal seam; Based on the cost type index, there is a positive correlation between the net flow with the height and width of the trackless auxiliary transportation equipment, respectively. The trackless auxiliary transportation equipment selection principle should be ‘‘height first then width'. Combined with the field application of the trackless auxiliary transportation in Liangshuijing coal mine, the proper method to achieve the safe and high-efficient exploitation of a NHTCS fully-mechanized face is trackless tyred vehicle auxiliary transportation. | Wang Chen Tu Shihao Zhang Lei Yang Qianlong Tu Hongsheng | 2015 | International Journal of Mining Science and Technology2015，25，6： | 1 |
| 13 | Research situation and prospect of fully mechanized mining tech- nology in thick coal seams in China显示文摘 | TU Shihao YUANYong YANG Zhen etal | 2009 | Procedia Earth and Planetary Science2009，1，1： | 1 |
| 14 | Mechanics of rib spalling of high coal walls under fully-mechanized mining显示文摘 | Yuan Yong Tu Shihao Wu Qi Ma Xiaotao Tu Hongsheng Sun Lulu | 2011 | Mining Science and Technology (China)2011，，1： | 1 |
| 15 | Deep-hole presplit blasting mechanism and its application for controlled roof caving in shallow显示文摘 | Wang Fangtian Tu Shihao Yuan Yong | 2013 | International Journal of Rock Mechanics and Mining Sciences2013，64，6： | 1 |
| 16 | Research situation and prospect of fully mechanized mining technology in thick coal seams in China 显示文摘 | Tu Shihao Yuan Yong Yang Zhen | 2009 | Procedia Earth and Planetary Science2009，1，1： | 1 |
| 17 | Study of energy-efficient heat resistance and cooling technology for high temperature working face with multiple heat sources in deep mine显示文摘In the present research,we proposed a scheme to address the issues of severe heat damage,high energy consumption,low cooling system efficiency,and wastage of cold capacity in mines.To elucidate the seasonal variations of environmental temperature through field measurements,we selected a high-temperature working face in a deep mine as our engineering background.To enhance the heat damage control cability of the working face and minimize unnecessary cooling capac-ity loss,we introduced the multi-dimensional heat hazard prevention and control method called'Heat source barrier and cooling equipment'.First,we utilize shotcrete and liquid nitrogen injection to eliminate the heat source and implemented pressure equalization ventilation to disrupt the heat transfer path,thereby creating a heat barrier.Second,we establish divi-sional prediction models for airflow temperature based on the variation patterns obtained through numerical simulation.Third,we devise the location and dynamic control strategy for the cooling equipment based on the prediction models.The results of field application show that the heat resistance and cooling linkage method comply with the safety requirement throughout the entire mining cycle while effectively reducing energy consumption.The ambient temperature is maintained below 30℃,resulting in the energy saving of 10%during the high-temperature period and over 50%during the low-temperature period.These findings serve as a valuable reference for managing heat damage in high-temperature working faces. | Hongbin Zhao Shihao Tu Xun Liu Jieyang Ma Long Tang | 2023 | International Journal of Coal Science & Technology2023，10，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员