Huainan Mining Industry Group Co.

Huainan, China

Huainan Mining Industry Group Co.

Huainan, China
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Lan T.,Anhui University of Science and Technology | Liu H.,Anhui University of Science and Technology | Liu H.,Huainan Mining Industry Group Co. | Sang S.,China Coal Research Institute | Xu H.,Anhui University of Science and Technology
IOP Conference Series: Earth and Environmental Science | Year: 2017

In order to effectively distinguish the source of gas gush in the goaf of the coal mine, Sihe coal mine was chosen as the studied object. Carbon isotope of methane, ethane, carbon dioxide and hydrogen isotope of methane in gas from the desorbed gas of the working coal seam and the near coal seam, and gas in the goaf were tested, by systemic sampling coal samples and gas samples of the goaf. Combined with gas component from the goaf, the working coal seam and the near coal seam, the proportion of gas gush in the goaf were determined by the numerical calculation on separate source of isotopes. The results show that the difference of gas component, stable carbon and hydrogen isotopes of gas from the different coal seams is obvious. And the methane concentration in gas increase along with the increase of coal seam depth, carbon and hydrogen isotopes in gas become heavier along with the deepen of burial depth of coal seam depth. The results of the numerical calculation on separate source indicate that the proportion of the gushed gas in the lagged traverse No. 1 from the desorbed gas of coal seam No. 3∼No. 8-2 is 38%, 37%, 12%, 8%, 5%, the proportion of the gushed gas in the lagged traverse No. 2 from the desorbed gas of coal seam No. 3∼No. 8-2 is 22%, 36%, 24%, 12%, 6%. © Published under licence by IOP Publishing Ltd.


Liu H.,Anhui University of Science and Technology | Sang S.,China University of Mining and Technology | Wang G.G.X.,University of Queensland | Li M.,Shanxi Coalbed Methane Branch of Huabei Oilfield Company | And 7 more authors.
Journal of Petroleum Science and Engineering | Year: 2014

This study performs a block scale investigation on gas content of a coal reservoir in Zhengzhuang Block of the southern Qinshui basin in China. The gas content of Coal Seam No. 3 in this coal reservoir was measured in field and laboratory in conjunction with tests on coal properties such as adsorption isotherm, maximum vitrinite reflectance, coal composition and maceral component etc. Total 36 coal cores collected from 3 adjacent coalmines in the southern Qinshui basin were investigated, including analysis of logging data from the drilling wells. The investigations provided experimental data for block scale modeling and visualization analyses on the correlation between gas content and the key factors such as coal properties and geological conditions of the coal reservoir. Data obtained by field and lab tests were analyzed by statistical models in order to correlate gas content and individual type of coal properties and geological variables. The statistical model was then used to map the gas content of the target coal seam in the studied area, resulting in a flood map of gas content at a 1:50000 scale. The flood map was further visualized with other variables in terms of the properties of coal and coal reservoir and its geological conditions. These visualized maps provide useful geological interpretation for block scale investigation of the comprehensive relationships between the gas content and the coal properties and regional structure in the given coal reservoir. The results show that gas content has little correlation with coal rank, maceral composition, coal thickness, cap and bottom lithology, while it is highly related to the structural properties such as burial depth and effective cover thickness. A stagnant hydrodynamic condition is favorable to the higher gas content on the whole but does not contribute to gas lateral and local variation. Canonical correlation and principal component analysis on the statistical model reveal the key factors that control the gas content are burial depth, effective thickness of overlying strata, groundwater level and moisture content in coal seam. © 2013 Elsevier B.V.


Kan J.-G.,China University of Mining and Technology | Kan J.-G.,Huainan Mining Industry Group Co. | Zhang N.,China University of Mining and Technology | Zhang N.,Huainan Mining Industry Group Co. | And 4 more authors.
Yantu Lixue/Rock and Soil Mechanics | Year: 2011

The common field gob-side entry retaining roofs are divided into three types, i.e. thick immediate roof, thin immediate roof and without immediate roof. Through utilizing the continuous laminate model and considering the factors of the support effect of the coal side in the roadway, the incentives of roof caving, etc., the calculation formulas of roadside support resistance under three kinds of roof conditions are obtained. According to the formulas, the increase bearing ability of coal side and the roof of filling areas benefit to decrease the support resistance of filling body beside roadways. With the decrease of the thickness of immediate roof, the support resistance of filling body increase.The roof collapse's incentives would vary from different layers of immediate roof. Gravity causes the thick immediate roof's collapses; and on the other hand, the movement of upper rock layers causes the thin immediate roof's collapses.


Wu K.,China University of Mining and Technology | Cheng G.-L.,Huainan Mining Industry Group Corporation Ltd | Zhou D.-W.,China University of Mining and Technology
Arabian Journal of Geosciences | Year: 2015

Dynamic movement within strata overlying coal mines and the distribution of the movement boundary are keenly investigated topics but are hampered by the difficulties of obtaining reliable monitoring data of movement within rock masses. The work presented in this paper combines physical experiments with a digital photogrammetry method to investigate these two topics. Two similar material model experiments were conducted, and a high-precision, close-range digital photogrammetry method was employed to observe movement in the model. The results, including dynamic movement tracking of targeted points, indicate the presence of six different movement areas in the overlying strata in the model. Based on motion vector directions determined for the model, the overlying strata were divided into three zones: (1) a zone with the movement vector oriented vertically downward, (2) a zone with the movement vector oriented towards the goaf center, and (3) a zone with the movement vector oriented towards the coal pillar. Dynamic movement tracking shows that all zones experienced an initial, active, and decline stage, but the timing, duration, and movement tracks are different for each zone. The overall analysis reveals that the movement boundary in the strata overlying the rock mass is not a straight line, but an S-shaped curve, in contrast to the traditional findings with respect to the movement boundary. These findings may prove significance in guiding better prediction of movement and deformation inside a given rock mass and related improvements in protecting engineered infrastructure. © 2014, Saudi Society for Geosciences.


Zhou D.-W.,China University of Mining and Technology | Wu K.,China University of Mining and Technology | Cheng G.-L.,Huainan Mining Industry Group Corporation Ltd | Li L.,China University of Mining and Technology
Arabian Journal of Geosciences | Year: 2015

Based on a wealth of measured data and the special occurrence condition of coal seam in the Huainan coal mining area of China, this paper proposes a new idea, which is to first separate the overlying bedrock and quaternary alluvium upon coal seam, then study regularities of mining subsidence, respectively, and finally, make a comprehensive research. A method of combining the physical simulation, theoretical analysis, and experimental data is adopted; the internal mechanism behavior and the characteristics of the surface subsidence in coal mining areas with thick alluvium are investigated. The results show that the subsidence in thick alluvium coal mining areas consists of four parts: the subsidence of alluvium soil following the bedrock subsidence caused by coal mining; the synergy subsidence between alluvium soil and bedrock; the subsidence due to groundwater loss and consolidation of the alluvium soil in coal mining area; and the compacting subsidence of shallow soil under the disturbance of coal mining. This theory can be used to completely explain the particularity of surface subsidence in coal mining areas with thick alluvium and provide the basis for establishing the prediction model. © 2014, Saudi Society for Geosciences.


Wang N.,China University of Mining and Technology | Wu K.,China University of Mining and Technology | Liu J.,Huainan Mining Industry Group Co. | An S.-K.,Huainan Mining Industry Group Co.
Meitan Xuebao/Journal of the China Coal Society | Year: 2013

In order to predict the surface movement and deformation more accurately, a new prediction model of mining subsidence was provided based on Boltzmann function by mathematic analysis. Through theoretical analysis, the relationship of parameters between new model and probability integration model was deduced, and put forwards the index of important influence radius, and equal to a quarter of main influence radius, other parameters were the same as the probability integration model. In combination with a case verification of three working faces in Huainan mining area, the study results show that compared with probability integration the new model is better in determining parameters by fitting. Especially at the boundary of the subsidence basin the convergence is slower. And the new model is suitable for sick soil layers mining area.


Kang H.,China Coal Research Institute | Niu D.,Huainan Mining Industry Group Co. | Zhang Z.,China Coal Research Institute | Lin J.,China Coal Research Institute | And 2 more authors.
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineering | Year: 2010

Deformation characteristics of surrounding rock and stress distribution of deep gob-side entry retaining, which was located in the first coal mine of Xiejiaji, the Huainan coal mining area, were analyzed by means of numerical simulation. The underground test for the deep gob-side entry retaining was introduced in detail, including the designs for primary supporting in the entry, additional enhanced supporting, and supporting beside the entry, and the monitoring data during various stages from driving, retaining to reusing. The supporting effects were evaluated through the analysis of the data of surrounding rock and backfilling body displacements and the loads along bolts and cables. The underground practice points out that the severe surrounding rock deformation in the deep gob-side entry retaining can be effectively controlled; and its stability can be kept by means of the synthetic supporting system, which consists of the high pretension and intensive bolts and cables as the primary supporting in the entry, individual props with articulated roof beam as the enhanced supporting, and paste backfilling as supporting beside the entry. On the basis of the research achievements obtained from numerical simulation and field test, the relationship between the primary supporting in the entry, additional enhanced supporting and supporting beside the entry were discussed; the great differences between deep and shallow entries on the breaking position of main roof, its rotation, and long-term creep of surrounding rock were indicated; and the supporting design criteria for the deep gob-side entry retaining were put forward. The improvement suggestions were also made in accordance with the existing problems in underground test.


Cao X.-C.,Hefei University of Technology | Qian J.-Z.,Hefei University of Technology | Sun X.-P.,Huainan Mining Industry Group Co.
Meitan Xuebao/Journal of the China Coal Society | Year: 2010

Chose hydrochemical data of 46 water samples in Quaternary and Coal in Guqiao Mine, took use of multivariate statistical analysis methods to classify and identify the groundwater. Based on the results obtained by the principal component analysis and cluster analysis, used Bayes discriminant analysis method to establish the discriminant model of mining groundwater chemical in each aquifer(discriminant function), and then discriminated forecast water samples. Finally compared with Artificial Neural Network, Degree of Grey Incidence method, Bayes Discriminant Analysis and Fuzzy Comprehensive method, it has a higher accurance than the former two methods and the same as the latter two methods. The results show that it is an effective and practical way in classifying and identifying of groundwater or gushing water sources with high stability.


Yang K.,Anhui University of Science and Technology | Lu W.,Anhui University of Science and Technology | Pan G.,Huainan Mining Industry Group Co. | Sun L.,Anhui University of Science and Technology
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | Year: 2015

Aimed at complicated geological conditions of large inclined angle seam with soft coal, soft roof, and soft floor and difficulties for ground control in rotary and full-mechanized longwall mining with high height in Panbei coal mine, field observation and numerical simulation have been used to investigation into strata behaviors of No. 12124. Based on strata behaviors analyzing, the ground pressure mechanism have been opened out with longwall and high height rotation mining in complicated geological and technical conditions. During the process of rotary mining, with the mining-induced stress affected after No. 12125 longwall panel mined, the co-action of abutment pressure concentration developing and powered support periodical supporting is the key factor to result in roof fracturing, roof falling, coal collapsing in working face, and large deformation of entries' surrounding rocks. Some technique have been implemented and practiced, which mainly includes as follows: to pave network and use steel beams to strengthen the roof salability; to apply anti-skid jack to connect hydraulic support to conveyor and advancing jack to control the decline of conveyor; to use bolting-wire-mesh to control stability of entries surrounding rock in rotation areas; to reinforce timbers to control stability of entries advanced about 10 m to working face. Engineering practice show that research plays an important role in safely mining and provides technologies for rotation mining in complicated geological conditions. ©, 2015, China University of Mining and Technology. All right reserved.


Chang J.,Anhui University of Science and Technology | He L.,Huainan Mining Industry Group Co Ltd
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | Year: 2015

According to the engineering conditions of the C15 haulage roadway at -960 m elevation in Xieyi coal mine, dynamic deformation characteristics of surrounding rock between the roof, two sides and the floor and the main reasons of floor heave have been obtained through monitoring the roadway deformation and analyzing floor heave factors. The results show that the main reasons of floor heave are the squeezing and flowing of fractured rock mass, which cause the stress and deformation of roadway release from the non-supporting floor. The comprehensive measures are put forward and put into practice accordingly, including the roof and two sides grouting, floor cable supporting and curtain grouting of hydraulic hose. In addition, a self-manufacturing floor drilling machine is adopted to overcome the difficulty in drilling the cable holes. Facts have proved that the technology can effectively control the floor heave and keep the roadway stable for a long time in deep coal mine. © 2015, Editorial Board of Journal of Mining & Safety Engineering. All right reserved.

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