Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering

Chongqing, China

Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering

Chongqing, China
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Sun X.Y.,Shijiazhuang University | Sun X.Y.,China University of Mining and Technology | Sun X.Y.,Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering | Liu D.H.,Hebei University of Science and Technology | And 2 more authors.
Proceedings of the 2012 International Conference on Industrial Control and Electronics Engineering, ICICEE 2012 | Year: 2012

A type of portable rock bolt nondestructive detecting system is designed, which is based on the ARM and Windows CE operating system. In hardware design, the signal acquisition module, A/D conversion module, LCD module and the power module are introduced respectively. In software design, the Windows CE operating system customization and the design applications program are completed. Proved by the experiment, the system has a good application prospect in paractical application. © 2012 IEEE.


Sun X.,Shijiazhuang University | Sun X.,China University of Mining and Technology | Sun X.,Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering | Cheng J.,China University of Mining and Technology | And 2 more authors.
International Journal of Modelling, Identification and Control | Year: 2012

The parameters such as the length of rock bolts, anchorage length, free length or construction defects (e.g., the position of less density in anchorage body) are important to evaluate the quality of rock bolts. Because of the harsh environment, the measured signal includes many kinds of noise, which have a great effect to the signal. It is difficult to detect the signal effectively by traditional information processing technology, and therefore the new information processing technology based on non-destructive detecting is provided. The steps are as follows: first, excite rock bolts using pseudo-random signal, then acquire the reflection signal and transmit to a computer, and remove the reflection signal noise using the Hilbert-Huang transform method and extract the characteristic value, finally, calculate the parameters of rock bolts using cross-correlation method and complete detection of rock bolts. Experimental results show that the effect of the above detection method is better than traditional correlation method. Copyright © 2012 Inderscience Enterprises Ltd.


Li K.,Kunming University of Science and Technology | Li K.,Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering | Hou K.,Kunming University of Science and Technology
Disaster Advances | Year: 2012

A underground metal mine plan to stope the orebodies was abandoned by the former private mining. But a township highway, which is called as Jingmin road, is just above the orebody and the distance between them is only 40-50m. In order to ensure secure operation of the road, it is important to study the subsidence law of road surface during the mining which contributes to optimize the stoping scheme. So, on the basis of determining the rock mass macro mechanical parameters, the subsidence law, influence range and overlying rock stability at different mining plan are analyzed with the various numerical simulation methods such as 2D-BLOCK 3D-σ Flac3D. The simulation results show that the subsidence height of road surface is increased nonlinearly with the increasing of exploitation height. If the whole orebody is mined, the maximum sinking height will be up to 1.4m and now the Jingmin road has already destroyed. Only the when stoping level is less than 1300m, the safety of road can be guaranteed.


Zhao Z.,Shandong University of Science and Technology | Zhao Z.,Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering | Gan D.,Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering | Tan Y.,Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering | Teng G.,Shandong University of Science and Technology
Disaster Advances | Year: 2012

The impact of external electric field on gas flow in coal seam is studied in this paper. According to the seepage mechanics and the electro-osmotic theory, seepage equations of the coal seam gas under the effect of external electric field are established and the lattice Boltzmann method (LBM) programs for seeking the numerical solutions are given. The simulation results were compared with the experimental results. It proves that simulating the gas seepage in coal seam under the effect of geo-electric field with the LBM is feasible. On this basis, the distributions of gas pressure in the flow field and its evolution law over time are studied. The results show that when the gas pressure gradient remains constant, from the high pressure end to the low pressure end, the gas pressure in the flow field eventually presents a non-linear distribution. The gas pressure of the coal seam drops along a negative exponential function curve over time eventually stabilizes at a certain value. The geo-electric field can make the gas seepage velocity increasing from 1 to 1.72 times.


Li K.G.,Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering | Li K.G.,Kunming University of Science and Technology | Xu J.,Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering
Rock Mechanics: Achievements and Ambitions - Proceedings of the 2nd ISRM International Young Scholars' Symposium on Rock Mechanics | Year: 2012

With the increase of mining intensity and depth, the support of rock tunnel has become a heavy problem affecting the safety production and economic benefit. Aimed at the situation of supporting difficulty of deep granite tunnel at a Metal mine in Yunnan province, through the X-ray diffraction, free swelling ratio test and slaking test, the destabilizing mechanism of the granite tunnel is studied and its supporting measures were proposed. Finally, the numerical simulation was used to analyze the supporting effect. The results show that: (1) the granite contains plentiful high hydrophilicity clay minerals, its average free swelling ratio is up to 27.17%, after comparing, the granite can be classified as the medium-strong swelling soft rock. (2) The failure mechanism of granite tunnel can be understood as a constantly swelling, slaking and disintegration process of granite under water condition, while the existence of clay minerals is just the critical reason resulting in aggravated deformation of granite. (3) Through simulation calculation and analysis, the proposed combined supporting measures, bolts anchoring in the roof, sidewalls and floor (bolt length is 1.8 m, bolt space is 0.75 m × 1.0 m), shotcrete (thickness is 10 cm), floor counter-arch poured (thickness is 25 cm), are reasonable and feasible. After the supporting are carried out, the plastic zone of adjacent rock will be significantly reduced, and the safety factor is also increased from 0.75 to 1.24. © 2012 Taylor & Francis Group.


Zhao T.,Shandong University of Science and Technology | Tan Y.,Shandong University of Science and Technology | Liu S.,Shandong University of Science and Technology | Chen Y.,Jinan Time Assay Testing Machine Co. | And 2 more authors.
ICMHPC - 2010 International Conference on Mine Hazards Prevention and Control | Year: 2010

In order to reveal deformation laws of anchored rock under long-term loads, in this paper, creep mechanical characteristics of anchored rock are analyzed, and anchorage constitutive model considering time effect is initially studied based on laboratory tests. Red sandstone of good homogeneity is used as anchored matrix, bamboo as the anchor, mixture of barite powder and rosin alcohol as the binder, then anchored red sandstone is made according to the similar criteria. Non-anchored and anchored specimens' indoor long-time (above 100h) creep test is conducted by RLJW-2000 rheology tester, The results show that, creep stress threshold of anchored rock is increased by about 30%σc, creep deformation at different stress level stage is significantly controlled, and anchored specimen's long-term intensity is increased by 5%∼10%σ c, which still has some capacity after destroyed. In addition, starting from the overall mechanical effect of anchor's reinforcement to rock, according to equivalent co-deformation principle, one-dimensional creep constitutive equation of anchored rock is established, the answer of anchored generalized Kelvin (B-K) model is derived and control mechanism on creep deformation of rock by bolt is analyzed. © Atlantis Press, 2010.


Zhao Z.,Shandong University of Science and Technology | Zhao Z.,Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering | Tan Y.,Shandong University of Science and Technology | Zhao T.,Shandong University of Science and Technology
ICMHPC - 2010 International Conference on Mine Hazards Prevention and Control | Year: 2010

There are many influence factors for coal and gas outburst, in which the stress wave is the most important one of the non-geological factors. Using the implicit-explicit analytical function of ANSYS/LS-DYNA, the response of roadway surrounding rock under the stress wave is simulated and the inducing effect of stress wave is studied. It is found that, under stress wave, tensile stress and compressive stress occurs in roadway surrounding rock. The vertical pressure of left side midpoint and horizontal pressure of right side midpoint act mainly as tensile pressure, and the pressure value increases along with the stress wave intensity. The horizontal displacement time curve of roof and floor and left side midpoint can be described as this: the value decreases deeply from plus peak to minus peak during Oms -10ms, and the evolution of right side midpoint is reverse to that of left side midpoint. The horizontal velocity time curve of roof and floor midpoint is that the value decreases deeply from peak to trough, then increasing slowly and keep flat. The horizontal velocity time curve of left side midpoint is similar to cosine curve and of right side midpoint is similar to sinusoid curve. © Atlantis Press, 2010.


Yan H.,Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering | Yan H.,Chongqing University of Technology | Fu Y.,Chongqing University of Technology | Yin G.,Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2012

A new shift-invariant non-aliasing Ridgelet transform was presented to avoid aliasing and shift-variant in old Ridgelet transform. Firstly, image size was expanded twice via interpolating zero values,so that the sampling rate in Radon transform domain was improved and the aliasing was reduced; Secondly, the one-dimensional discrete wavelet transform in the old Ridgelet transform was replaced by one-dimensional dual-tree Complex wavelet transform(DCWT) which had both shift-invariant and double directional analysis ability. On this basis, a new image enhancement method for linear features was proposed by using zero-mean Gaussian mode in the shift-invariant non-aliasing Ridgelet transform domain. Experimental result shows that the presented Ridgelet transform can avoid effectively the 'scratch around'phenomenon in reconstructed image and the visual effects of the image enhancement is improved obviously. © 2012 Springer-Verlag Berlin Heidelberg.


Su H.-Y.,Southwest University of Science and Technology | Su H.-Y.,Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering | Huang J.,Southwest University of Science and Technology | Xiao D.-J.,Southwest University of Science and Technology | She Y.-H.,Southwest University of Science and Technology
Procedia Engineering | Year: 2011

The vibration load caused by the impact and explosion in construction exerts great influence on the surrounding earth. Therefore, the safe operating condition of gas pipeline is seriously influenced. For the first time, by use of smart microseismic monitoring system, such vibration caused by the impact and explosion is monitored and analyzed. First, it reveals the transmission law of vibrating wave forms. Second, the coupling calculating models of pipeline earth under the influence of vibration is built. Finally, the characteristics of exerted force and transformation of earthpipeline system are analyzed. According to these microseismic data obtained from the spot and numerical simulation method, the dynamic response of underground pipeline under compound vibration is studied; nonlinear mathematical model theory and method for coupling effects of earth and pipeline are built; the effects of vibration to pipeline are assessed; the feasible assessing method of safe operating condition of gas pipeline under vibration is explored and developed. © 2011 Published by Elsevier Ltd.


Lin X.,Key Laboratory For The Exploitation Of Southwestern Rsrc And The Environmental Disaster Control Engineering | Lin X.,Chongqing Jiaotong University | Yu Q.,Chongqing Jiaotong University
Lecture Notes in Electrical Engineering | Year: 2012

In China, Slopes along highway in mountainous area are very much and their distributing is wide, also the slopes are affronting geological environment and the naissance of them are double-quick. It is difficult that evaluate the stability of the slopes along highway at present. The design and realize of slope safety assessment system along highway in mountainous area are described. In holistic safety assessment subsystem, the importance arrangement of various indexes can be made based on simple dependent function and the analytic hierarchy process and expert reliability based on the matter element analysis theory to revise the weights of index. Also, the way of matter-element extension to build matter element extension model for high slope along highway in mountainous area are imposed. In local safety division subsystem, through coupling the unified strength theory and the Lode stress parameters, the mathematic model is established for calculating the local safety and stability of the high slope along highway in mountainous area. Based on ArcGIS9.3, the high slope data are pre-processed and analyzed. And by using the finite element analysis software, the study profiles of high slope are numerical simulated. The relevant parameters of each node of the studied profiles are acquired. Then the stimulation results are further analyzed and visualized by ArcGIS9.3. Finally, the safety division maps of the study profiles are obtained. The result indicated that the compositive system can provide veracious information for slope safety and straightway roads. © Springer-Verlag Berlin Heidelberg 2012.

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