Shanxi Luan Environmental Energy Development Co.

Changzhi, China

Shanxi Luan Environmental Energy Development Co.

Changzhi, China
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Xiao T.-Q.,Henan Polytechnic University | Li H.-M.,Henan Polytechnic University | Yang J.-L.,Shanxi Luan Environmental Energy Development Co. | Jiang S.-Y.,Henan Polytechnic University
Meitan Xuebao/Journal of the China Coal Society | Year: 2014

Based on the nearly 100 m2 large section chamber for large mining height support reloading, with the site observation and numerical simulation method, surrounding rock deformation and failure mechanism was analyzed. With the increase of chamber section, the failure zone and the plastic zone increase, the plastic zone radius of super large section chamber is 2.2 times about normal section chamber. The high disturbed stress because of large section, the small thickness of anchorage body with bolt support, and the low initial support resistance resulted in serious deformation and failure of weak surrounding rock. According to the 0-2.5 m failure zone and the 2.5-8.0 m plastic zone of support reloading chamber, the stability principle of zonal control of coupling support for large cross section chamber was put forward. After chamber excavation, the failure zone, the plastic zone and the elastic zone were formed, the surrounding rock damage degree was gradually reduced from shallow to deep, and also the needed support strength to be stability decreased gradually, through the high strength and high pre-stress support with bolt, grouting cable and cable, three load bearing ring can be formed according to the failure zone, the plastic zone and the elastic zone, so that the three zones are connected organically, and the support strength for the three zones can be satisfied, and a common loading of supporting structure and surrounding rock can be ensure the stability of the surrounding rock.


Tang J.,China University of Mining and Technology | Tang J.,Shanxi Luan Environmental Energy Development Co. | Xu J.,China University of Mining and Technology | Wan S.,China University of Mining and Technology | And 2 more authors.
Journal of Computers | Year: 2011

Evaluation and selection of coal distributors is one of the most important choices that a coal manufacturer will make new market development. Sales performance and marketing strategy implementation will be directly affected by the result of decision. This paper introduces a computeraided decision support tool for qualifying potential coal distributors. Based on fast moving consumer goods, this tool, developed as an expert system, provides the user with seven dimensions and specific criteria for arriving at reasonable conclusions by Analytic Hierarchy Process, assesses the accuracy class of those evaluators of by artificial neural network, and demonstrates the comprehensive evaluation methodology for qualifying potential coal distributors. These criteria and related insights form the basis of discussion in the article. © 2011 ACADEMY PUBLISHER.


Zhang H.,University of Science and Technology Beijing | Liu Y.-S.,University of Science and Technology Beijing | Fang L.-Z.,Shanxi Luan Environmental Energy Development Co. | Zhan Y.,Shanxi Luan Environmental Energy Development Co.
Beijing Keji Daxue Xuebao/Journal of University of Science and Technology Beijing | Year: 2013

The combustion process of raw coal with different additives was characterized by thermogravimetry and statistical analysis. It is found that the activation energy of raw coal can be reduced from 98.07 kJ·mol-1 to 73.73, 78.50, and 76.45 kJ·mol-1 by adding MnO2, CaO, and CeO2 with the mass fraction of 2%, respectively. The exothermic peak temperatures of combustion are separately lowered from 534.2 to 482.7, 489.4, and 484.9°C, but the additives have little effect on the exothermic peak temperature of oxidation, leading to a 30°C reduction of distance between the oxidation peak and the combustion peak. The effects of additives on the activation energy and the combustion peak accord well with the Boltzmann equation fitted through experimental data. The lower the exothermic peak temperature of combustion, the smaller the activation energy is. Thus the activation energy can be approximately evaluated from the exothermic peak temperature of combustion in the differential thermal analysis curve.


Su Y.,University of Science and Technology Beijing | Qi X.,University of Science and Technology Beijing | Liu Y.,University of Science and Technology Beijing | Zhang J.,Shanxi Luan Environmental Energy Development Co.
Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development | Year: 2013

To improve data transfer rate and signal telemetry depth in electromagnetic measurement while drilling (EM-MWD), and to solve the problems of short life expectancy and poor reliability of drill pipes as well as serious electromagnetic scattering, this paper presents the measurement while drilling (MWD) method based on the carrier communication principle. Based on carrier technology, the electromagnetic wave signal was coupled with the drill pipe through the coupling transformer, where the drill pipe and formation can form the guiding wave system to achieve data transfer between the ground and the bottom. The transmission line equation is developed based on the analysis of the transmission characteristics of electromagnetic waves in strata and drill pipes, and the overall structure of the system is presented. The real transmitter and receiver are produced by using LM1893 as the carrier module. In addition, the system optimization is proposed. The electromagnetic waves loaded on the drill pipe using carrier technology can transmit drilling measurement parameters from the bottom to the surface in real time, and send setting parameters and commands from the surface to the bottom simultaneously through the drill pipe-formation channel, and thus achieve the implementation of bi-directional communication between the ground and the bottom.


Zhang H.,University of Science and Technology Beijing | Zou N.-D.,Chinese People's Liberation Army | Liu Y.-S.,University of Science and Technology Beijing | Fang L.-Z.,Shanxi Luan Environmental Energy Development Co. | Zhan Y.,Shanxi Luan Environmental Energy Development Co.
Meitan Xuebao/Journal of the China Coal Society | Year: 2013

The combustion kinetic characteristics of raw coal with different additives were studied using thermal gravimetric analysis. The integral method was used to calculate the individual activity energy of the samples, and the temperatures of peaks in the DTA curves were computed. The results show that adding 2% of MnO2, CaO and CeO2 to raw coal can reduce the temperature of the peak during combustion from 535°C down to the range of 480-490°C, and lower the activity energy from 98 kJ/mol to the range of 70-80 kJ/mol; the addition of 2% of K2CO3 can lower the temperature to the range of 460-470°C and activity energy to the range of 50-60 kJ/mol. The coincidences of the activity energy (E) and temperature (T) are found to conform to the Boltzmann equation described by the relationship of E=106.22-323.37/[1+exp(T/35.45-11.42)].


Luo B.,Hunan University of Science and Technology | Wan B.,Hunan University of Science and Technology | Qin W.,Shanxi Luan Environmental Energy Development Company Ltd | Xu J.,Shanxi Luan Environmental Energy Development Company Ltd
Applied Mechanics and Materials | Year: 2013

In order to solve the nonlinear feature fusion of underwater sediments echoes, the shortage of Enhanced Canonical Correlation Analysis (ECCA) was analyzed and made ECCA extend to Kernel ECCA (KECCA) in the nuclear space, a multi-feature nonlinear fusion classification model with KECCA combining with Partial Least-Square (PLS) was put forward. In the process of identifying four types of underwater sediment such as Basalt, Volcanic breccia, Cobalt crusts and Mudstone, the results showed that the recognition accuracy could be further improved for the KECCA + PLS model. © (2013) Trans Tech Publications, Switzerland.

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