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| 1 | Green coal mining technique integrating mining-dressing-gas draining-backfilling-mining显示文摘Aiming to address the following major engineering issues faced by the Pingdingshan No. 12 mine:(1) difficulty in implementing auxiliary lifting because of its depth(i.e., beyond 1000 m);(2) highly gassy main coal seam with low permeability;(3) unstable overlying coal seam without suitable conditions for implementing conventional mining techniques for protective coal seam; and(4) predominant reliance on ‘‘under three' coal resources to ensure production output. This study proposes an integrated, closed-cycle mining-dressing-gas draining-backfilling-mining(MDGBM) technique. The proposed approach involves the mining of protective coal seam, underground dressing of coal and gangue(UDCG), pressure relief and gas drainage before extraction, and backfilling and mining of the protected coal seam. A system for draining gas and mining the protective seam in the rock stratum is designed and implemented based on the geological conditions. This system helps in realizing pressure relief and gas drainage from the protective seam before extraction. Accordingly, another system, which is connected to the existing production system, is established for the UDCG based on the dense medium-shallow trough process. The mixed mining workface is designed to accommodate both solid backfill and conventional fully mechanized coal mining, thereby facilitating coal mining, USCG, and backfilling. The results show that: The mixed mining workface length for the Ji15-31010 protected seam was 220 m with coal production capacity 1.2 million tons per year, while the backfill capacity of gangue was 0.5 million tons per year. The gas pressure decreased from 1.78 to 0.35 MPa, and the total amount of safely mined coal was 1.34 million tons. The process of simultaneously exploiting coal and draining gas was found to be safe, efficient, and green.This process also yielded significant economic benefits. | Zhang Jixiong Zhang Qiang Spearing A.J.S.(Sam) Miao Xiexing Guo Shuai Sun Qiang | 2017 | International Journal of Mining Science and Technology2017，27，1： | 14 |
| 2 | Construction and stability of an extra-large section chamber in solid backfill mining显示文摘In solid backfill mining without gangue removal, the gangue is separated directly underground and backfilled into goaf. This necessitates the underground construction of an extra-large section chamber for separation equipments. For the construction of an extra-large section chamber in the Tangshan mine, we proposed an active support through a combination of bolting, anchor cables, lining, and a reinforced chamber floor by inverted arch pouring. ABAQUS software was used to analyze the surrounding rock deformation and the plastic zone development of the chamber under different excavation schemes.The best excavation scheme was determined, and the effectiveness of the combined supports was verified. In practice, the engineering installation showed good overall control of the movement of the surrounding rock, with roof-to-floor and side-to-side convergences of 154.6 and 77.5 mm, respectively,which meets the requirements for underground coal gangue separation. | Ju Feng Li Meng Zhang Jixiong Miao Xiexing Liu Zhan | 2014 | International Journal of Mining Science and Technology2014，24，6： | 10 |
| 3 | Non-destructive testing and pre-warning analysis on the quality of bolt support in deep roadways of mining districts显示文摘The bolt support quality of coal roadways is one of the important factors for the efficiency and security of coal production. By means of a self-developed technique and equipment of random non-destructive testing, non-destructive detection and pre-warning analysis on the quality of bolt support in deep roadways of mining districts were performed in a number of mining areas. The measured data were obtained in the detection instances of abnormal in-situ stress and support invalidation etc. The corresponding relation between axial bolt load variation and roadway surrounding rock deformation and stability was summarized in different mining service stages. Pre-warning technology of roadway surrounding rock stability is proposed based on the detection of axial bolt load. Meanwhile, pre-warning indicators of axial bolt load in different mining service stages are offered and some successful pre-warning cases are also illustrated.The research results show that the change rules of axial bolt load in different mining service stages are quite similar in different mining areas. The change of axial bolt load is in accord with the adjustment of surrounding rock stress, which can consequently reflect the deformation and stability state of roadway surrounding rock. Through the detection of axial bolt load in different sections of roadways, the status of real-time bolt support quality can be reflected; meanwhile, the rationality of bolt support design can be evaluated which provides reference for bolting parameters optimization. | Zhang Houquan Miao Xiexing Zhang Guimin Wu Yu Chen Yanlong | 2017 | International Journal of Mining Science and Technology2017，27，6： | 9 |
| 4 | Mechanical analysis of effective pressure relief protection range of upper protective seam mining显示文摘This paper analyzes the control mechanism of coal and gas outbursts and proposes the concept of an effective pressure relief protection range, based on the stress relief of the underlying coal-rock mass and the development of a plastic zone. Also this study developed a stress change and fracture development model of the underlying coal-rock mass. In addition, the stress and depth of fracture of any point in the floor were deduced with the application of Maple Calculation Software. The specific engineering parameters of the Pingdingshan No. 12 colliery were applied to determine the relationship between the depth of fracture in the floor and the mining height. The pressure-relief principle of the underlying coal-rock mass was analyzed while varying the mining height of the upper protective seam. The findings indicate that as the depth of fracture in the floor increases, the underlying coal-rock mass experiences a limited amount of pressure relief, and the pressure relief protection range becomes narrower.Additionally, the stress distribution evolves from a ‘‘U' shape into a ‘‘V' shape. A 2.0 m mining height of protective seam situates the outburst-prone seam, Ji_(15), within the effective pressure relief protection range. The fracture development and stress-relief ratio rises to 88%, ensuring the pressure-relief effect as well as economic benefits. The measurement data show that: after mining the upper protective seam, the gas pressure of Ji_(15) dropped from 1.78 to 0.35 MPa, demonstrating agreement between the engineering application and the theoretical calculation. | Yin Wei Miao Xiexing Zhang Jixiong Zhong Sijian | 2017 | International Journal of Mining Science and Technology2017，27，3： | 8 |
| 5 | Fracture mechanics model of fully mechanized top coal caving of shallow coal seams and its application显示文摘Based on break characteristics of roofs in fully mechanized top-coal mining of thick shallow coal seams, a fracture mechanics model was built, and the criterion of crack propagation in the main roof was derived using the fracture mechanics theory. The relationships between the fracture length of the roof and the working resistance of the supports were discovered, and the correlations between the load on the overlying strata and the ratio of the crack's length to the thickness of the roof were obtained. Using a working face of Jindi Coal Mine, Xing county Shanxi province as an example, the relationships between the fracture length of the roof and the working resistance of the supports were analysed in detail. The results give a design basis in hydraulic top coal caving supports, which could provide useful references in the practical application. On-site experiment proves that the periodic weighting step interval of the caving face is 15–16 m, which is basically consistent with the theoretical analysis results, and indicates that the mechanized caving hydraulic support is capable of meeting the support requirements in the mining of a super-thick but shallowly buried coal seam. | Zhang Jiangong Miao Xiexing Huang Yanli Li Meng | 2014 | International Journal of Mining Science and Technology2014，24，3： | 6 |
| 6 | Strata behavior investigation for high-intensity mining in the water-rich coal seam显示文摘This paper describes a specific case of mining in a water-rich coal seam in western China. Water inrushes,roof caving and other disasters induced by intensive mining operation could pose great threats to the safety of coal mines. The strata behavior during the high-intensity extraction in the water-rich coal seam is analyzed by employing the numerical simulation method and in situ monitoring. The results show that about 10 m ahead of the workface, the front abutment pressure peaks is at 34.13 MPa, while the peak of the side abutment pressure is located about 8 m away from the gateway with the value of 12.41 MPa; the height of the fracture zone, the first weighting step and the cycle weighting step are calculated to be 45,50 and 20.8 m, respectively; pressure distribution in the workface is characterized by that the vertical pressure in the center occurs earlier and is stronger than those on both ends. Then, the results above are verified by in situ measurement, which may provide a basis for safe mining under similar conditions. | Ding Huande Miao Xiexing Ju Feng Wang Xiulin Wang Qingcang | 2014 | International Journal of Mining Science and Technology2014，24，3： | 6 |
| 7 | Overlying strata movement of recovering standing pillars with solid backfilling by physical simulation显示文摘To analyze the overlying strata movement law of recovering room mining standing pillars with solid backfilling.Physical simulation experiments with sponge and wood as the backfilling simulation material were tested.The results show that:(i) The covering-rock mechanics of the overly strata comes from 'two-arch structures + hinged girder + bend beam' to 'backfilling material + hinged girder + bent beam' by increasing the fill ratio from 0%to 85%,the beginning of overlying strata movement appears later and the total duration of subsidence velocity increased from zero to the highest value increases.The trend of 'single polarization' of the subsidence velocity curves becomes noticeable and the velocity variation trend becomes stable,(ii) The equiponderate aeolian sand was added to improve the anti-pressure ability of the loess,and the corresponding ground processing & transportation system was designed. | An Baifu Miao Xiexing Zhang Jixiong Ju Feng Zhou Nan | 2016 | International Journal of Mining Science and Technology2016，26，2： | 3 |
| 8 | Treatment of unstable angina with trimetazidine显示文摘在 endothelin 上象它的效果一样在不稳定的咽峡炎(UA ) 的治疗上评估临床的治疗学的效果 oftrimetazidine 的目的 -- 我病人的水平和复杂并发症。有 UA 的 120 个病人被使随机化进 trimetazidine 组( n =60 )和控制组( n =60 )的方法, trimetazidine 组每天加常规治疗,和临床的症状与 60 mg trimetazidine 受到治疗六个月,在心电图的变化,在血浆传播 endothelial 房间( CEC )和二个组的 endothelin-1 水平的数字的变化在治疗以后被观察四个星期;并且发生心脏的心律不齐评价,心脏的失败,住院也在治疗以后由于咽峡炎,心肌的梗塞和突然的死亡被观察六个月。结果 1 ) 在在为四个星期的治疗以后的 trimetazidine 组和控制组的综合临床的治疗学的效果的全部的有效的率是 86.7% 和 68.3% ,分别地(P < 0.05 ) ,并且优越率是 36.7% 和 15%(P < 0.01 ) 分别地;为在心电图的治疗学的效果的全部的有效的率是 66.7% 和 46.7% ,分别地(P < 0.05 ) ,并且优越率是 30.0% 和 11.7% ,分别地(P < 0.01 ) 。2 ) 血浆 CEC 的数字和在为四个星期的处理以后的二个组的 endothelin-1 水平显著地减少了(P < 0.05 ) ,但是在 trimetazidine 组的减少是甚至重要的(P < 0.01 ) 。 3 )为在在为六个月的处理以后的 trimetazidine 组和控制组的心脏的心律不齐的发生率是10%和20%( P < 0.05 ),分别地并且为心脏的失败的发生率是8.3%和18.3%,分别地( P < 0.05 ),并且为住院的发生率由于咽峡炎是10%和15%,并且为心肌的梗塞的事件率分别地是3.3%和13.3%( P < 0.05 )。结论 Trimetazidine 能显著地改进 UA 和心肌的局部缺血的症状,把损坏归结为血容器内皮细胞层和复杂并发症,并且改进预后。 | Xiexing Chen Mingfang Ye | 2009 | Journal of Geriatric Cardiology2009，6，2： | 3 |
| 9 | Discrimination conditions and process of water-resistant key strata显示文摘Water-preservation mining is one of the most important parts of the ‘Green Mining' technology system,which can realize the effective regulation of groundwater resources by controlling strata movement,changing passive prevention and governance of water disasters to active conservation and utilization of groundwater resources and thus obtaining coal and water simultaneously in mining.The concept of water-resistant key strata further enriches the content of the key stratum theory and provides a theoretical basis for water-preservation mining.In order to realize the idea of water-resistant key strata as a guideline in the design of water-preservation mining and engineering applications,the conditions for discrimination in the process of water-resistant key strata,we have presented a mechanical model,as well as its corresponding computer program,based on a large number of theoretical analyses and field measurements,as well as on a comprehensive consideration of the position,structural stability and seepage stability of key strata.Practical engineering applications indicate that this discrimination method and its corresponding computer program on water-resistant key strata are accurate and reliable and can satisfy the actual design needs of water-preservation mining and thus have instructional importance for water-preservation mining in mining areas lacking water. | WANG, Lianguo MIAO, Xiexing WU, Yu SUN, Jian YANG, Hongbo | 2010 | Mining Science and Technology2010，20，2： | 2 |
| 10 | Evolution of coal permeability from stress-controlled to displacement-controlled swelling conditions显示文摘 | Jishan Liu Zhongwei Chen Derek Elsworth Xiexing Miao Xianbiao Mao | 2011 | Fuel2011，，10： | 2 |
| 11 | Locoregional and distant recurrences after breast conserving therapy in patients with triple-negative breast cancer: A meta-analysis显示文摘 | WangJ XieX WangX | 2013 | Surg Oncol2013，22，4： | 1 |
| 12 | Altered expression of cellular membrane molecules of HLA-DR, HLA-G and CD99 in cervical intraepithelial neoplasias and invasive squamous cell carcinoma 显示文摘 | ZhouJ H YeF Chen H Z Zhou C Y LuWG XieX | 2006 | Life Sci2006，78，： | 1 |
| 13 | Dressing of resin-bonded superabrasive grinding wheels by means of acousto-optic Q-switched pulsed Nd YAG laser 显示文摘 | XIEX Z CHEN G Y LI L J | 2004 | Optics g Laser Technology2004，36，1： | 1 |
| 14 | Evolution of coal permeability from stress-controlled to displacement-controlled swelling conditions显示文摘 | Jishan Liu Zhongwei Chen Derek Elsworth Xiexing Miao Xianbiao Mao | 2011 | Fuel2011，，10： | 1 |
| 15 | Experimental study of seepage properties of broken sandstone under different po- rosities显示文摘 | MIAO Xiexing LI Shuncai CHEN Zhanqing | 2010 | Transport in Porous Media2010，86，3： | 1 |
| 16 | Experimental study of seepage properties of broken sandstone under different porosities显示文摘 | MIAO Xiexing LI Shuncai CHEN Zhanqing | 2011 | Transport in Porous Media2011，86，3： | 1 |
| 17 | An experimental investigation of permeability measurement of water flow in crushed rocks显示文摘 | MA Dan MIAO Xiexing JIANG Guohua | 2014 | Transporaaat in Porous Media2014，105，3： | 1 |
| 18 | Experimental study of seepage properties of broken sandstone under different porosities显示文摘 | MIAO Xiexing LI Shuneai CHEN Zhanqing | 2010 | Transport in Porous Media2010，86，3： | 1 |
| 19 | The height of fractured water-conducting zone in under- mined rock strata 显示文摘 | MIAO Xiexing CUI Ximin WANG Jinan | 2011 | Engineering Geology2011，，120： | 1 |
| 20 | Transplantation ofmesenchymalstem cells preconditioned with hydrogen sulfide enhancesrepairof myocardialinfarctioninrats显示文摘 | XieX Sun A Zhu W etal | 2012 | TohokuJ ExpMed2012，226，1： | 1 |
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