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Analysis on the deployment of mining research supported by the grant program of Deep Resources Exploration and Mining

FAN Jun ZHANG Jialin QIN Yuan WANG Hao GAO Yanan PEI Yongzhi

FAN Jun, ZHANG Jialin, QIN Yuan, WANG Hao, GAO Yanan, PEI Yongzhi. Analysis on the deployment of mining research supported by the grant program of Deep Resources Exploration and Mining[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(3): 1-7. doi: 10.3969/j.issn.1001-1986.2021.03.001
Citation: FAN Jun, ZHANG Jialin, QIN Yuan, WANG Hao, GAO Yanan, PEI Yongzhi. Analysis on the deployment of mining research supported by the grant program of Deep Resources Exploration and Mining[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(3): 1-7. doi: 10.3969/j.issn.1001-1986.2021.03.001

Analysis on the deployment of mining research supported by the grant program of Deep Resources Exploration and Mining

doi: 10.3969/j.issn.1001-1986.2021.03.001
Funds: Research project supported by the Implementation Rules of the Interim Measures for National Key R&D Program of China
More Information
    Author Bio:

    FAN Jun, male, born in 1982, Hami City, Xinjiang, researcher, specializing in the research on the development strategy of resourcesand environmental technology as well as national science and technology program management. E-mail: fanjun@acca21.org.cn

  • Fig. 1  The organization and main tasks of the mining section of DREAM

    Table  1  The distribution of projects undertaking units and funding

    Type of units Number of projects Funding(in RMB 10 000) Total funding(in RMB 10 000)
    University 31 11 423 26 273
    Research institute 3 1 168 3 268
    Enterprise 34 10 973 41 923
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    Table  2  The research contents and purposes of scientific problems of deep resources mining

    Basic scientific problems Research contents Purposes
    In-situ mechanical behavior of deep rock Focus on the research on the principles and technologies for in-situ testing of deep rock; reveal new standards for in-situ fidelity rock mechanics experiments and exploring the characteristics of unconventional constitutive behavior of deep rock based on the rock mechanics and theory of the deep mining-induced stress path Revolutionize in-situ research methods of deep rock mechanics and in-situ rock mechanical behavior systems, establishing the foundations for proposing the new theory of deep rock mechanics and deep mining
    Visualization of stress field and energy field of rock under mining-induced stress conditions Provide a systematic study on the internal energy accumulation, transmission, dissipation and release law of deep coal and rock disasters; quantitatively characterize the size of stress field and energy field, spatial distribution and accumulation location of deep coal and rock; propose quantitative visual analysis methods, truly reproduce the mechanical behavior and energy accumulation and evolution process of deep rock, and enrich the energy regulation theory of deep rock Break the bottleneck that it is difficult to directly observe and quantitatively describe deep mining and catastrophe, and propose the prediction method and catastrophe model of the temporal and spatial evolution law of stress field and energy field induced by deep rock under the action of mining-induced stress, laying a theoretical foundation for constructing the theory of deep rock mechanics and for the prediction, prevention and control of disasters in deep mining
    Long-term stability behavior of surrounding rock in deep underground spaces Based on the occurrence environment of deep surrounding rock, carry out the mechanistic study on the stress wave propagation and attenuation law, and the interaction between dynamic response and stress wave propagation, explore their influence mechanism on the long-term stability of deep surrounding rock, and investigate the mechanical behavior and law of deep surrounding rock in long-term operations, reveal the instability and fracture, energy accumulation and dissipation, and disaster-causing mechanism of deep surrounding rock in long-term operations, and identify the mechanical behavior and law of deep surrounding rock in long-term operations under supported and unsupported engineering conditions Reveal the mechanism for the interaction between the dynamic response and stress wave propagation of deep surrounding rock, develop support control technology for the time-dependent degradation response of deep surrounding rock, and establish the theory and technical method of long-term deformation monitoring and control and safety evaluation of deep surrounding rock, providing scientific guidance for the long-term stability evaluation and control of deep surrounding rock
    Theory of multiphase and multi-field coupling rock mechanics under the conditions of strong disturbance and strong aging Based on the attributes of strong disturbance and strong aging, explore the mutual coupling mechanism of deep multiphase medium, the disturbance characteristics of multiphase medium and various physical fields caused by enhanced mining, and the change law of physical and mechanical properties under the strong aging condition; study the stable and unstable deformations, failure state and transformation mechanism, conditions and laws of deep rock under the action of multiple fields such as high ground stress, groundwater, gas and temperature Uncover the deformation, intensity characteristics and law of mining rock and ore body under the action of multi-physical fields in the deep occurrence environment below 2 000 m, construct the model of the coexistence of solid-liquid-gas multiphase and multi-field coupling under the action of strong disturbance and strong aging of deep rock, establish multi-phase and multi-field seepage theory for deep resources mining
    Deep high stress induction and energy regulation theory Focusing on the unconventional fracturing mechanism of deep high stress hard rock under dynamic disturbance, the theory and method of deep high stress induced fracture, and the benign transformation mechanism of transient release of catastrophic energy and effective rock fragmentation, investigate the deep hard rock unloading and mechanics and energy consumption characteristics under dynamic disturbance, the continuous mining mode discrimination system of deep hard rock deposits, the theory and method of stably releasing stress in the deep near stope area, the fine rock breaking coupled with high stress and blasting in deep hard rock, and the theory of non-explosive continuous mining of deep hard rock Reveal the fracture attributes and constitutive characteristics of high-stress hard rock under dynamic disturbance, put forward the high-stress induced fracturing method of deep hard rock mining to obtain the orderly release and controllable utilization of the original energy storage of deep hard rock in different mining modes, and construct the active energy regulation theory in the optimal mining mode
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    Table  3  The contents and targets of research on engineering technical problems on deep resources mining

    Engineering technical problems Research contents Targets
    Mechanical control of large deformation of surrounding rock in deep mine construction projects Based on the field test and the scientific phenomenon of large deformation in deep engineering, identify the zoning of the scientific phenomena of deep shaft construction and the main controlling factors, put emphasis on studying the structure effect and control of the deformation and failure of deep shaft, the mechanism and control of large deformation and failure of the chamber group at the deep shaft bottom, the disaster-causing mechanism of large deformation disasters of deep soft rock, and the mechanism and control of large deformation and failure of deep mine development roadway and intersection, and develop integrated monitoring-prediction-control technology for deep shaft construction engineering disasters Make control countermeasures for large deformation disasters in deep mine construction, build a design system of mine roadway system based on the new construction method of no-coal-pillar retained roadway mining, and develop a technology system for the efficient and safe construction of mines under high confining pressure and high water pressure in shallow depths of 2 000 m
    Synergetic control of bolting-modification-distressing of enhanced mining roadway in 1 000-meter-deep shaft Combining the three methods of active control of surrounding rock: active support of high-strength and high-pretension bolts, active fracturing and grouting modification of coal and rock mines, and active stress transfer of directional hydraulic fracturing, study the synergistic control mechanism of the three, and the supporting system with stress control and the improvement of surrounding rock self-supporting capacity as the core Develop the "bolting-modification-distressing" coordinated control technology for surrounding rock in 1 000-meter deep mine roadways, tackle the control problem of surrounding rock in high-stress, large-deformation, and low-permeability roadways, and realize the efficient mining of a 350-meter ultra-long working face in 1 000-meter mines
    Stability control and intelligent coal caving of overlying strata in large-space stope with extra-thick coal seams Study the evolution process of overlying strata structure failure under the conditions of large stope space and high-intensity mining with intelligent fully-mechanized caving mining to obtain the overlying strata failure law; establish stope overlying strata mechanics models; study the instability form and criterion of overlying strata failure structure and the spatial distribution law of the dynamic load on the top coal body caused by the failure and instability of overlying strata; develop a "bolting-caving" coordinated high-efficiency coal caving mechanism; make breakthroughs in technologies for the straightness monitoring of the fully mechanized caving face, support posture, and the precise location monitoring of coal caving mechanism Build an intelligent security technology system for fully mechanized caving faces in extra-thick coal seams, develop safe, efficient, and intelligent fully mechanized caving mining demonstration faces, and realize intelligent fully mechanized caving mining of extra-thick coal seams, with an annual output of 15 million tons, a recovery rate of not less than 90%, and a mixed gangue rate that does not exceed 10%
    Integrated mining, selection and filling of deep coal mines Centering on the back fill mining control of deep coal mines, the chain failure and instability of surrounding rock for the super-large section dense chamber group, and the precise separation of coal gangue in the confined space underground, conduct a systematic study on key technologies such as the optimization of the layout of underground mining, selection and filling space as well as the selective mining of coal with a small amount of gangue, the precise sorting of intelligent modularized, compact, full-grain water medium coal gangue, the long-term stability control of super-large section sorting chamber group, efficient automated mining and filling coordinated operation, and efficient preparation of underground back fills Realize the gangue separating rate ≥90%, the loss of coal in waste < 3%, the raw coal separation capacity for a single system at 4 million tons/year, the coal mining efficiency of the back fill face not less than 85% of that of the caving face, the resource recovery rate in the back fill mining area increasing by 10%, the section shrinkage rate of the super-large section dense chamber group < 12%, the load-bearing compression rate of the gangue polymer back fill < 8%, and the capacity of the filling system at 1.5 million tons/year
    In-situ high-efficiency rock breaking in high-stress and strong-compression hard rock strata in deep metal mines In view of the technical problems of deep excavation in metal mines, investigate the correlation between the in-situ performance of the hard rock formations of metal mines and the rock breaking efficiency and its evaluation methods, and develop the deep shaft blasting technology with high efficiency and low damage in high stress hard rock formations, as well as the mechanical drilling rock crushing technology and intelligent correction drilling rigs Develop the mechanical and blasting efficiency and technology of deep hard rock in metal mines; obtain the excavation disturbance effect as well as its influence on the stability of shaft surrounding rock, blasting vibration and its control, and other key technologies; develop technologies and equipment suitable for accurate rock breaking and high-efficiency tunneling of deep shaft in metal mines, and realize the cyclical footage for blasting in tunneling up to 5 m, over-excavated volume < 150 mm, blast hole utilization at 90%, drilling pilot hole depth between 600 m and 800 m, and drilling deviation < 1.5 m
    Advance fracturing and precise blasting of combined holes in deep rock with high energy storage Carry out the research on the advance fracturing and precise blasting technology for combined holes in deep rock with high energy storage; grasp the energy accumulation and migration law of the near-empty surface in the blasting zone with the characteristics of high energy storage in deep deposits; explore the effective fracturing mechanism of high energy storage release; establish a fracture model coupling high energy storage and explosive energy, and develop the activation mechanism of dynamic fracture mechanics under short-delay blasting of combined holes in high stress rock as well as fracturing techniques Develop high energy concentration and positioning technology in the blasting zone, and precise short-delay vibration reduction and fracturing and self-stabilizing control blasting technology for combined holes; achieve high-stress energy storage and explosive energy coordinated rock- breaking and hazard control, and control the blasting rate of large blocks(≥800 mm) within 5%, with the comprehensive cost of blasting down more than 5%
    Non-explosive and intensive continuous mining of deep hard rock Develop the intelligent mining mode for multiple mining areas in large sections of deep deposits and the process and time-space coordinated operation mode of the operation chain during the deep mining production process; integrate intelligent mining equipment to build an intensive collaborative process for deep mines, carry out investigations and record analysis of deep hard rock joints and fissures, and dynamic time and space monitoring and prediction of deep mining loosen zone; establish high-stress rock non-explosive continuous mining mode, and optimize the production system, engineering structure parameters and mining sequence of intensive continuous mining in large sections of deep deposits to ensure safe working environment for continuous mining Establish the continuous mining mode discrimination system under different depths and various occurrence conditions, obtain the orderly release and controllable utilization mode of the original energy storage of hard rock in the lower depth, construct an active energy regulation method to realize the optimal mining mode, and develop the technology for safe and efficient mining and guarantee for synergy in large sections of deep deposits below 1 500 m
    Stability control of the back fill and rock system used in deep metal mines Study the relationship between the hydration and hardening characteristics of back fills in the deep environment, the multi-element coupling environment of high stress, high heat and high salinity, and the performance degradation of backfills; starting from the interaction between back fills and surrounding rocks, as well as the stress analysis, energy absorption, and failure modes of back fills, reveal the joint mechanism of rock and back fill mechanics of deep mining; clarify the principle of back fill mechanics of deep metal mines, and form a high-stress stope back fill intensity optimization and structural design method Reveal the internal mechanism of the interaction between deep stress environment, rock mechanical properties, engineering geological conditions and deep mining engineering, mining process, and stope back fills; realize the capacity of a single set of paste back fills > 100 m3/h, and develop the theory and technology for the coordinated mining of deep metal mines below 2 000 m
    Intelligent management and control of metal mining equipment based on big data Based on big data technology, develop prediction, diagnosis, control and scheduling of metal mining equipment, as well as an integrated platform that incorporates the functions such as the precise control of the entire process of paste back fills, health diagnosis and control of mining equipment, and intelligent control and dynamic scheduling of underground operation process and equipment; establish equipment health indicators, mine production resource scheduling evaluation indicators, and a back fill concentration prediction evaluation system Establish a big data storage and service platform for metal mines, realize the management of the production process and the status data of at least five types of equipment; build a tailings deep cone thickener underflow concentration prediction and adaptive control system to narrow the fluctuation range of back fill concentration by more than 20%; realize the health management, fault prediction and condition-based maintenance of at least 5 types of equipment, with the fault prediction accuracy rate more than 90%
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出版历程
  • 收稿日期:  2020-10-27
  • 修回日期:  2020-11-19
  • 发布日期:  2021-06-25

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