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Journal of Central South University of Technology 2008年第3期15卷 356-360页

作者：高峰周科平董卫军苏家红 School of Resources and Safety Engineering Central South University Beijing General Research Institute of Mining and Metallurgy

With the help of similar material simulation test,time series system for induced caving of roof in continuous mining under complex backfill in ore body No.92 of Tongkeng Tin Mine was studied. According to the similarity theory,a two-dimensional similar simulation test-bed was constructed. The stress and displacement that change along with the advance of mining were acquired and analyzed automatically by data system. The processes of continuous mining of ore-block in 5 intervals and artificial induced caving of roof were simulated. The results of the test show that ore body remained as safety roof in thickness of 15 m guarantees the safe advance of stoping work face. Caving of safety roof puts in practice at the first two mining intervals when the third interval of continuous mining is finished,and one interval as the safety distance should be kept all the time between stopping and caving. While mining in the last interval,pre-slotting should be implemented first of all,and the roof of the last two mining intervals is caved simultaneously. Only this kind of time series system can be an efficient and safe way for induced caving of roof in continuous mining.

关键词： continuous mining induced caving similar material simulation safety roof slotting

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维普期刊数据库

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Study on relation between tectonic stress and coal-mining subsidence with similar material simulation

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Journal of Coal Science & Engineering(China) 2005年第2期11卷 37-40页

作者：夏玉成支剑锋孙学阳 Department of Geological and Environmental Engineering Xi’an University of Science & TechnologyXi’an 710054 China Department of Geological and Environmental Engineering Xi’an University of Science & TechnologyXi’an 710054 ChinaDepartment of Basic Courses Xi’an University of Science & TechnologyXi’an 710054China

Using a minitype and stress-type test device for similar material simulation of coal-mining subsidence, the relation between tectonic stress and coal-mining subsidence was successfully simulated, furthermore, the test period of similar material simulation was obviously shortened and the test process was more dexterous and convenient. To do simi-lar material simulation with the minitype and stress-type test device was feasible and high-efficient. Bringing two models with the same geological and mining conditions to bear lateral compressive stress and tensile stress respectively and simulating the process of underground mining, the test results indicate that: under the compressive stress, the col-lapse of the coal roof occurs belatedly and the damaged range in cover of coal seam is smaller, therefore the movement and deformation of the cover and its damage to the ground geological environment are not evident; whereas under tensile stress, the situation is contrary to which mentioned above. A conclusion was obtained from the test that the ground environment hazards in coal mining areas were controlled by the regional geo-logical tectonic stress field.

关键词： tectonic stress coal-mining subsidence similar material simulation stresstype test device the cover of coal seam

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Bolt-grouting combined support technology in deep soft rock roadway

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International Journal of Mining Science and Technology 2016年第5期26卷 777-785页

作者： Chen Yanlong Meng Qingbin Xu Guang Wu Haoshuai Zhang Guimin State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining & Technology Department of Mining Engineering & Metallurgical Engineering Western Australian School of Mines Curtin University School of Mechanics and Civil Engineering China University of Mining & Technology

Analyzing the mineral composition, mechanical properties and ground stress testing in surrounding rock,the study investigated the failure mechanism of deep soft rock roadway with high stress. The boltgrouting combined support system was proposed to prevent such failures. By means of FLAC3D numerical simulation and similar material simulation, the feasibility of the support design and the effectiveness of support parameters were discussed. According to the monitoring the surface and deep displacement in surrounding rock as well as bolt axial load, this paper analyzed the deformation of surrounding rock and the stress condition of the support structure. The monitor results were used to optimize the proposed support scheme. The results of field monitors demonstrate that the bolt-grouting combined support technology could improve the surround rock strength and bearing capacity of support structure, which controlled the great deformation failure and rheological property effectively in deep soft rock roadway with high stress. As a result, the long term stability and safety are guaranteed.

关键词： Deep soft rock roadway Bolt-grouting support Numerical simulation similar material simulation High stress

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