Guizhou Xinlian Blasting Engineering Group Co.

Guiyang, China

Guizhou Xinlian Blasting Engineering Group Co.

Guiyang, China
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Yan H.,China University of Mining and Technology | He F.-L.,China University of Mining and Technology | Li L.-Y.,Guizhou Xinlian Blasting Engineering Group Co. | Feng R.-M.,Southern Illinois University Carbondale | Xing P.-F.,China University of Mining and Technology
Journal of Central South University | Year: 2017

Cable truss systems have been widely applied in roadways with complicated conditions, such as the large cross-sections of deep wells, and high tectonic stress. However, they are rarely applied to roadways with extremely thick coal seams because the control mechanism of the system for the deformation of the roof and the separation between coal rock segments is not completely understood. By using the relationship between the support system and the roof strata, a mechanical model was established to calculate the deformation of the roof in a thick coal seam with bedding separation under different support conditions: with an anchor truss support and without support. On this basis, the research was used to deduce a method for computing the minimum pre-tightening forces in the anchor truss, the maximum amounts of subsidence and separation with, and without, anchor truss support under the roof, and the maximum subsidence and the decreasing amounts of the separation before and after adopting the anchor truss. Additionally, mechanical relationships between the minimum pre-tightening force and the anchoring force in the anchor were analyzed. By taking a typical roadway with thick coal roof as an example, the theoretical results mentioned above were applied in the analysis and testing of a roof supporting project in a roadway field to verify the accuracy of the theory: favorable experimental results were achieved. In addition, the relationships among other parameters were analyzed, including the minimum pre-tightening forces applied by the anchor truss, the angle of inclination of the anchor cable, and the array pitch. Meanwhile, the changing characteristics of the amounts of roof separation and subsidence with key parameters of the support system (such as array pitch, pre-tightening force, and inclination angle) were also analyzed. The research results revealed the acting mechanism of the anchor truss in control of roadway stability with a thick coal seam, providing a theoretical basis of its application in coal mining. © 2017, Central South University Press and Springer-Verlag GmbH Germany.


Tao T.,Guizhou Xinlian Blasting Engineering Group Co. | Huang S.,China Earthquake Administration | Liu L.,Jiangxi University of Science and Technology
Journal of Vibroengineering | Year: 2017

Wind power towers located in the intertidal zone are not only influenced by wind load but also affected by the rising and falling of the tides. Little research examining the dynamic characteristics of wind power towers under multi-factor coupling loads has been conducted. Based on the finite element method and field testing, dynamic characteristics of the wind towers under complex loads were studied. Change laws of natural frequencies of wind power towers under different water levels were analyzed, and change laws of acceleration, displacement, strain and failure characteristics of a wind power tower under the coupling load of wind and tide levels were analyzed. The wind tower blade in expansion and deformation characteristics of two types of feathering were analyzed. The results showed that the influence of water levels on the low order natural frequency of a wind power tower structure was slight, but the influence on the high order frequency was higher. The maximum displacement of a wind power tower structure under a fluctuating wind load increased with increasing height. In extreme cases, a wind power tower will appear to have buckling instability destruction when the blades are in a state of suitable slurry. The top displacement of a wind power tower was less than a state displacement. Field monitoring results validate the correctness of the numerical simulation analysis. © JVE INTERNATIONAL LTD.


Tao T.J.,Guizhou Xinlian Blasting Engineering Group Co. | Tao T.J.,Wuhan University of Technology | Zhang J.H.,Wuhan University of Technology | Chi E.,Guizhou Xinlian Blasting Engineering Group Co. | And 2 more authors.
Advanced Materials Research | Year: 2014

In order to resolve the uncertainty problem of influence factors in effect evaluation of bench blasting, the effect evaluation model of bench blasting based on uncertainty measurement theory was built, then this model was used to evaluate the bench blasting effect in Hongshuitai flat engineering. The evaluation results show that: the information entropy and confidence identifying criterion were respectively used to ascertain the evaluation index weight and identifying criterion, by these ways, the evaluation results of this model are more objective; and the evaluation index can be selected flexibly according to actual situation, the calculation of evaluation model is simple, so the evaluation results can offer decision basis for blasting workers to make timely adjustment of the blasting scheme. © (2014) Trans Tech Publications, Switzerland.


Cui X.-J.,Guizhou Xinlian Blasting Engineering Group Co. | Shi C.,Hohai University
Progress in Civil, Architectural and Hydraulic Engineering - Selected Papers of the 4th International Conference on Civil, Architectural and Hydraulic Engineering, ICCAHE 2015 | Year: 2016

A new algorithm, which can randomly generate Karst cave geometry, was developed in this work. Each Karst cave geometry was regarded as a polyhedron. All the suppositional polyhedra, which represent the Karst caves, are cast into the research domain according to the random distribution rule of the Karst caves. Then, the solid polyhedra are transformed into void to model the Karst caves. Thus, the resultant domain is the rock mass that contains Karst caves. Two supernumerary algorithms, the merging neighboring points algorithm and the threshold value interception algorithm, were also employed to obtain caves with random shape and distribution according to the real caves’ shapes, area ratios, radius ranges, distributions and smoothness. The method proposed in this work provides a way to numerically simulate Karst caves. © 2016 Taylor & Francis Group, London.


Zhao M.S.,Guizhou Xinlian Blasting Engineering Group Co. | Chi E.A.,Guizhou Xinlian Blasting Engineering Group Co. | Chi E.A.,Guizhou University | Kang Q.,Guizhou Xinlian Blasting Engineering Group Co. | And 2 more authors.
Applied Mechanics and Materials | Year: 2014

In blasting excavation of shallow tunnel, the surface vibration of excavated tunnel can be amplified due to effect of hollow. This effect is an important factor for safety of surface buildings. Based on the measured data of one tunnel excavation project, combining wavelet analysis and AOK time-frequency distribution method, the surface vibration signals in front and rear position of working face are processed into different frequency bands. Taking PPV, dominant frequency, d7 (7.8125-15.625 Hz) band energy ratio and d7 (7.8125-15.625 Hz) band energy duration as indexes, the effect of hollow on time-frequency characteristics of surface vibration signal is studied in this article. The results show that, affected by the hollow in excavated region, the PPV and dominant frequency increase, and the d7 (7.8125-15.625 Hz) band energy shows fluctuant ratio of total energy and an increase of band energy duration. The results show that the hollow influence on the frequency characteristics of the surface vibration signals comprehensively, and also provide an analytical basis for anti-vibration and vibration reduction study from the angle of energy. © (2014) Trans Tech Publications, Switzerland.


Luo Y.J.,9855 Branch of Guizhou Jiulian Industrial Explosive Materials Development Co. | Tao T.J.,Guizhou Xinlian Blasting Engineering Group Co. | Chi E.A.,Guizhou Xinlian Blasting Engineering Group Co.
Advanced Materials Research | Year: 2014

Emulsion explosive is one of common industrial explosives, its performance ability is important for producer. So the experiment and theory analysis were made to improve the performance ability of emulsion explosive in this paper. The results show that: performance ability of explosive becomes bigger when oxygen balance of explosive is zero or slightly negative; Water content also has a significant impact on stability, density and explosive performance of emulsion explosive; performance ability of emulsion explosive is generally rises with density increasing. The key approaches of improving the performance ability are that improving the explosion heat and hematocrit and selecting appropriate moisture content and density, and advanced process technology also should be put to use. © (2014) Trans Tech Publications, Switzerland.


Tao T.J.,Guizhou Xinlian Blasting Engineering Group Co. | Zhao M.S.,Guizhou Xinlian Blasting Engineering Group Co. | Kang Q.,Guizhou Xinlian Blasting Engineering Group Co.
Progress in Civil, Architectural and Hydraulic Engineering - Selected Papers of the 4th International Conference on Civil, Architectural and Hydraulic Engineering, ICCAHE 2015 | Year: 2016

Displacement and stress of silo wall influenced by batch piling are studied based on the finite model of the reinforced concrete shallow coal bunker. The results show that asymmetric loading produces larger deformation of the wall compared with symmetric loading. This is because in symmetric loading, the maximum displacement occurs at the top of the wall, the free end, and the maximum stress occurs at the foot of the wall, consistent with a cantilevered arrangement. These distribution patterns are relatively consistent with the mechanical property of the wall. The stress curve exhibits a sharp negative gradient as the stress decreases and then steadily increases to a crest at 10 m, after which it decreases through to the top of the wall. © 2016 Taylor & Francis Group, London.


Zhao M.S.,Guizhou Xinlian Blasting Engineering Group Co. | Kang Q.,Guizhou Xinlian Blasting Engineering Group Co. | Tao T.J.,Guizhou Xinlian Blasting Engineering Group Co.
Progress in Civil, Architectural and Hydraulic Engineering - Selected Papers of the 4th International Conference on Civil, Architectural and Hydraulic Engineering, ICCAHE 2015 | Year: 2016

The effects of hole-bottom layer air ratio on blasting vibration intensity, blasting vibration frequency as well as vibration lasting time were studied, and the effects of hole-bottom layer air ratio on the band advantage of blasting seismic wave frequency duration and frequency band energy ratio were studied based on the energy theory. And according to the real problems of earth excavation blasting of Zunyi City, Pu District II East Road on the 5th practical still room area, the test of bottom hole air interval charge was done. The test results showed that: the hole-bottom air space charge is an effective means to reduce the blasting vibration, and the optimum air layer ratio in test conditions in fractured rock is recommended as 15%. © 2016 Taylor & Francis Group, London.


Luo Y.J.,9855 Branch of Guizhou Jiulian Industrial Explosive Materials Development Co. | Zhao M.S.,Guizhou Xinlian Blasting Engineering Group Co. | Chi E.A.,Guizhou Xinlian Blasting Engineering Group Co. | Tao T.J.,Guizhou Xinlian Blasting Engineering Group Co.
Advanced Materials Research | Year: 2014

In order to resolve the problems that many units are intersect and mutual restraint in the safety evaluation of emulsion explosive continuous manufacturing, the safety evaluation model based on uncertainty measurement theory was built, then this model was used to evaluate the safety of emulsion explosive continuous manufacturing in one explosive industry. The evaluation results show that: the information entropy and confidence identifying criterion were respectively used to ascertain the evaluation index weight and identifying criterion, by these ways, the evaluation results of this model are more objective; and the evaluation units can be selected flexibly according to actual situation, the calculation of evaluation model is simple, so the evaluation results can offer decision basis for explosive industry to make good management. © (2014) Trans Tech Publications, Switzerland.


Tao T.J.,Guizhou Xinlian Blasting Engineering Group Co. | Zhao M.S.,Guizhou Xinlian Blasting Engineering Group Co. | Kang Q.,Guizhou Xinlian Blasting Engineering Group Co.
Progress in Civil, Architectural and Hydraulic Engineering - Selected Papers of the 4th International Conference on Civil, Architectural and Hydraulic Engineering, ICCAHE 2015 | Year: 2016

In order to resolve the uncertainty problem of influence factors of bench blasting effect pre-evaluation, the pre-evaluation model of the bench blasting effect based on the uncertainty measurement theory was built. Then, this model was used to pre-evaluate the bench blasting effect in Hongshuitai flat engineering. The pre-evaluation results show that the information entropy and confidence identifying criterion were, respectively, used to ascertain the pre-evaluation index weight and identifying criterion. In this way, the pre-evaluation results of this model are found to be more objective, and the pre-evaluation index can be selected flexibly according to the actual situation. The calculation of the evaluation model is found to be simple, so the evaluation results can offer a decision basis for blasting workers to make timely adjustment of the blasting scheme. © 2016 Taylor & Francis Group, London.

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