State Key Laboratory of Coal Resources and Safe Mining CUMT

China

State Key Laboratory of Coal Resources and Safe Mining CUMT

China
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Han H.Q.,University of Science and Technology Beijing | He F.L.,China University of Mining and Technology | He F.L.,State Key Laboratory of Coal Resources and Safe Mining CUMT | Li H.B.,China University of Mining and Technology | And 5 more authors.
Rock Mechanics: Achievements and Ambitions - Proceedings of the 2nd ISRM International Young Scholars' Symposium on Rock Mechanics | Year: 2012

Tectonic stress makes abscission layer between roof strata which leads to the failure of roof bolt and shear fracture of the roof. By the second mining influence, the stress distribution of the surrounding rock in isolated coal pillar becomes more complex. Under the joint action of rock gravity stress, tectonic stress and mining stress, the isolated coal pillar will bear super-high stress and achieve its destroy limit. Besides, the surrounding rock shows characteristic of large deformation and difficult maintain. In Xinsan colliery, some technical problems such as high abutment pressure, broken coal and rock, large section and so on are met when the roadway is excavated in fold fault area. Aiming at these problems and according to the characteristics that the stress transfer produced by prestressed cable truss system can change the stress state of surrounding rock, the joint support technology is designed combined with the field conditions of Xinsan colliery. The numerical simulation software is also applied to optimize the parameters of the supporting scheme. Field implement shows that the joint support technology based on cable truss can solve the support problems of large section coal roadway. © 2012 Taylor & Francis Group.


Liu F.H.,China University of Mining and Technology | Xu X.,State Key Laboratory of Coal Resources and Safe Mining CUMT
Advanced Materials Research | Year: 2011

According ad grid computer by application, Grid computer security has be valued more and more. LDAP is a information catalogue, it defined customer and group just one, that can commonly shared it with machine and application program too many. This paper is defined group and user object to accomplish with the user code and legal power, thereby control that encryption and permission by C/S. © (2011) Trans Tech Publications.


Li J.,China University of Mining and Technology | He F.,China University of Mining and Technology | He F.,State Key Laboratory of Coal Resources and Safe Mining CUMT | Yan H.,China University of Mining and Technology | Jiang H.,China University of Mining and Technology
Safety Science | Year: 2012

For the caving and sliding control of roadways with large cross-section, thick mudstone roof and abutment pressure influence, the cable truss system is proposed and its support mechanism is thoroughly analyzed in this paper. Furthermore, according to the geometric size and ground pressure conditions on field coal roadways Nos. 101, 102 and 103 in Xinyuan Coal Mine, three types of cable truss support systems are designed for obtaining the optimum cable truss support system. Then the corresponding parameters for each support design are determined by use of the numerical simulation method, and three kinds of support systems are put into practice. The field observation results show that roof should be effectively controlled by the normal cable truss structure consisting of two long cables and one connector, and both coal sides can be protected by the simplified cable truss structure composed of two short cables and one channel bar. Finally, the optimal support system is gotten which is much better than the other two support designs in rock deformation control effect and economic profits. © 2011 Elsevier Ltd.


Zhang X.-K.,University of Science and Technology Beijing | Jiang H.-J.,China University of Mining and Technology | He F.-L.,China University of Mining and Technology | He F.-L.,State Key Laboratory of Coal Resources and Safe Mining CUMT | Weng M.-Y.,China University of Mining and Technology
Advanced Materials Research | Year: 2012

For the support problem of set-up room to be 7.8m wide with thick and broken coal roof in Pangpangta coal mine, the truss cable support system is adopted to control the set-up room surrounding rock. The main support parameters, such as cable length, cable angle and distance between orifice and side of the truss cable support system are simulated and optimally designed by using numerical simulation software FLAC 3D, by which the support scheme is designed reasonably. The support scheme is successfully tested at set-up room No. 10101 in Pangpangta mine. The set-up room deformation is small, and the support system is safe and reliable. This kind of support technology can be widely used in the similar set-up rooms. © (2012) Trans Tech Publications.


Sun Q.,China University of Mining and Technology | Zhang J.,China University of Mining and Technology | Zhang J.,State Key Laboratory of Coal Resources and Safe Mining CUMT | Zhang Q.,China University of Mining and Technology | And 3 more authors.
Natural Hazards | Year: 2016

Coal seams with low gas permeability and high gas outburst hazards are becoming more serious as coal mines extend deeper, but there are no appropriate protective coal seams for this kind of coal seam in China. In this paper, mining technology using a protective seam with nearly whole rock (PSNWR) is used to improve gas drainage and ensure safety during production. The characteristics of the distribution and occurrence of PSNWRs and their mechanical properties are analyzed. A theoretical mechanics model and three-dimensional numerical model are established to study the controlling effect of PSNWR mining on pressure-relief gas drainage. In this context, the mining process, system and gas extraction design for PSNWRs are introduced. The results for Pingdingshan No. 12 Coal Mine show that mining with a PSNWR 2.0 m thick can effectively reduce the danger of coal and gas outbursts and improve gas drainage and utilization. The gas drainage rates are >80 %, which significantly increases the social, economic and environmental benefits of Pingdingshan No. 12 Coal Mine. © 2016 Springer Science+Business Media Dordrecht


Xuxiu,China University of Mining and Technology | Xuxiu,State Key Laboratory of Coal Resources and Safe Mining CUMT
Communications in Computer and Information Science | Year: 2011

Based on the current communication web of mines, the paper puts forward one mine security grid model based on the development of the grid technology. Optimum resource management strategy makes it possible for the grid computing to get higher running capability. Thus, it can provide good service for the date calculation and the evaluation of mine security. © 2011 Springer-Verlag.


He F.,China University of Mining and Technology | He F.,State Key Laboratory of Coal Resources and Safe Mining CUMT | Wang X.,China University of Mining and Technology | Zhang D.,China University of Mining and Technology | He S.,China University of Mining and Technology
Advanced Materials Research | Year: 2013

Key factors affecting the control of roof fall and rib spalling are identified relying on the statistics for characteristics of roof fall and rib spalling distribution, and the regression analysis of the relationships of roof fall and rib spalling to support parameters by measuring actual ground pressures. The effect of support in controlling roof fall and rib spalling is analyzed by setting up a caving arch mechanical model of cataclastic coal and rock mass on fully mechanized caving face, and the key parameters of support are also determined using numerical simulation. © (2013) Trans Tech Publications, Switzerland.


Xie S.,China University of Mining and Technology | He F.,China University of Mining and Technology | He F.,State Key Laboratory of Coal Resources and Safe Mining CUMT | Yang H.,China University of Mining and Technology | And 2 more authors.
Advanced Materials Research | Year: 2011

Aiming at problem of low coal mining rate and environmental pollution by gangue, replacement mining technology of source recovery by excavating large span roadway and backfilling with gangue is put forward in this paper. Then combined control technology of roof cable truss and coalside cable-channel steel is applied to support the large span roadway, its control mechanism is discussed and the combined support scheme is defined by way of numerical simulation. Besides, according to the practice production condition, the replacement system which consists of gangue pretreatment, transport and replacement is established, achieving harmonic extraction of resource recovery and environmental protection and providing scientific basis and technological means for resource recovery under other geological conditions. © (2011) Trans Tech Publications.


Yang Q.,Anhui University of Science and Technology | Yang Q.,State Key Laboratory of Coal Resources and Safe Mining CUMT
Journal of Convergence Information Technology | Year: 2012

In order to explore the new method for realizing sustainable development of coal resources, this paper constructs econometric model of coal cost estimation, and makes empirical research on full costs of coal. It makes full use of the conception of marginal opportunity cost and modern marginal theory, analyses each cost item in coal excavation of a coal group, such as production cost of coal, resource cost of coal, external cost of coal. Empirically research coal full cost and further estimate the coal full cost in XX Coal Group, the experiment shows that the constructed econometric model of coal cost estimation is effective.


Yang Q.,Anhui University of Science and Technology | Yang Q.,State Key Laboratory of Coal Resources and Safe Mining CUMT
Advances in Information Sciences and Service Sciences | Year: 2012

Based on the system of coal full cost, the target layer, criterion layer, index layer of the sustainable development evaluation index system are respectively planned to establish the sustainable evaluation index model, this model is based on coal full cost in the mining area. Taking the mining area as an example, sustainable development evaluation in the mining area is experimented and analyzed. It is clearly proved that the implementation of coal full cost promotes the sustainable development in the mining area; it is important practical for the sustainable development in the mining area. The proposed evaluation model is effective.

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