Xinwen Mining Group Corporation

Laiwu, China

Xinwen Mining Group Corporation

Laiwu, China

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Tian Q.T.,Xinwen Mining Group Co.
Advanced Materials Research | Year: 2014

This paper compares and analyzes the common recognition method and technology of irregular graphics and image, and its application to specific graphics recognition. In this paper, the application system realizes the image histogram processing, threshold value processing and edge processing, realizes the binary image, and then compared with database information, recognizing the need of graphic information, but also the graphic information such as encryption and decryption. The system is practical, the application scope is very broad, and has good popularization value. © (2014) Trans Tech Publications, Switzerland.


Zhang M.,Xinwen Mining Group Co. | Ning J.,Shandong University of Science and Technology
Advanced Materials Research | Year: 2012

Under the background of the hydrogeology conditions of the first working face of 11 coal seam in LuXin coal mine, theoretical formula prediction and numerical simulation were used to research the influence of mining height on the growth altitude of water flowing fractured zone. According to the requirement of the minimum thickness of waterproof coal pillars, the reasonable mining height was confirmed to be 3m. It was proved by similar material simulation that the maximum height of water flowing fractured zone was about 39.5m when the mining height is 3m, which was consistent with results of numerical simulation, and the thickness of protective layer was 23.5m, which ensured the safety of mining. © (2012) Trans Tech Publications.


Zhang M.,Shandong University of Science and Technology | Zhang M.,Xin Wen Mining Group Corporation | Ning J.,Shandong University of Science and Technology | Zhang H.,Shandong University of Science and Technology | Liu X.,Shandong University of Science and Technology
Applied Mechanics and Materials | Year: 2013

Microscopic structure and mineral composition of shallow rock in different geological group were detect using scanning electron microscopy technology, and the influence of microscopic structure and mineral composition on macro-mechanical properties was analyzed. The results showed that: from the surface to the coal seam: sandy mudstone particle surface banded, non-directional distribution into flake orientation distribution point - point contact - surface contact into contact between particles, resulting in the rock mass more easily broken, the breaking the block becomes small; the sandy mudstone particle volume decreases, the smaller the gap between the particles, and by filling into velvet spherical aggregates filling, resulting in increased contact area in the rock mass fracture; sandy shale montmorillonite content increases, the rock mass in the water particle volume expansion, extrusion intergranular pore, reduce pore channel, the rock mass macroscopic pass water to reduce. © (2013) Trans Tech Publications, Switzerland.


Zhang M.,Shandong University of Science and Technology | Zhang M.,Xin Wen Mining Group Corporation | Ning J.,Shandong University of Science and Technology | Tian C.,Shandong University of Science and Technology | Liu X.,Shandong University of Science and Technology
Applied Mechanics and Materials | Year: 2013

As the background of hydrological and geological conditions in Lu Xin Mine of Xinwen Mining Group, the transient electromagnetic instrument was used to detect the distribution law of aquifer around the first district. The detection results show that the roof and floor of 13# coal seam and the top of Jurassic are relatively rich in water, but the hydraulic connection between the upper and lower is relatively weak. The roof and floor of 6# and 9# coal seam and the bottom of Neogene are rich in water and the hydraulic connection is strength, and this place is located in the edge of basin which is easy for groundwater to supply. © (2013) Trans Tech Publications, Switzerland.


Cheng Y.-H.,Anhui University of Science and Technology | Jiang F.-X.,University of Science and Technology Beijing | Pang J.-L.,Xinwen Mining Group Co.
Meitan Xuebao/Journal of the China Coal Society | Year: 2012

By using the online intrinsic-safe mining pressure monitoring system, two observations regarding the lateral pressure were made to one solid coal side of goaf at the working face 3801 (where the fully-mechanized top-caving method FMTC was used) at Shuiliandong Mine, with the results are as follows: (1) The characteristics of movement of the overlying rock, force borne by the supports, and the lateral supporting pressure in the tunnel were obtained, the fact that pace of the periodical lateral pressure equals to that of the periodical strike pressure was revealed, and a model for the lateral overlying rock structure was established based on the stabilized roofing, the upper roof's structure (16-24 m above the coal seams) and the rock-beam structure for the main roof in the tunnel of goaf. (2) The conclusion was drawn that the property of the separating wall of the tunnel can suit the movement of the overlying rock resulted from the calculation by establishing the model of force-bearing of the separating wall of the tunnels in goaf in combination with the stress-strain relation. (3) The dominance of the overlying rock movement on pressure was determined on the basis of the features of the force bearing of the advanced support due to the lateral periodical pressure and the lateral supporting pressure, which will be used to study the theory by which the rock formation's movement controls the mine's pressure. The result was applied to optimize the width of the coal pillar between 3802 transport level and 3801 working face to 8 m, reduced by 22 m compared with the previous one so that the former meets the expectation after construction.


Guo Q.-Y.,China University of Mining and Technology | Guo Q.-Y.,Xinwen Mining Group Co. | Gao M.-T.,Xinwen Mining Group Co. | Zhou M.,Xinwen Mining Group Co.
Meitan Xuebao/Journal of the China Coal Society | Year: 2012

Considering the characteristics of the surrounding rock deformation of gob-side entry, motion law of the overlying strata after mining and the structure of roadside support, the gob-side roof structure was simplified as elastic mechanical model composed of gange in mined-out area, roadside packing and the roadside coal, and the anti-force on the main roof was calculated under the conditions. By the use of controlling variables, the main factors of the anti-force on the main roof was analyzed, which were backfill body width and backfill body elastic modulus, and the backfill body compression formula was obtained. On this basis, using the method of UDEC numerical simulation, the stress state of key roof rock of the gob-side entry was simulated, and the relationship of backfill body width and backfill body elastic modulus with roof convergence were obtained. On the basis of the above analysis, the method of gob-side entry rock controlling was determined in mining face 1705 of Zhaoguan Mine.


Chen J.,China University of Mining and Technology | Chen J.,Xinwen Mining Group Corporation | Zhang W.-S.,Xinwen Mining Group Corporation | Li T.,China University of Mining and Technology | And 2 more authors.
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | Year: 2010

Based on the geological conditions of 2# coal seam in the second mining area of Ezhuang coal mine and according to the priority protection requirement of buildings including school on the surface, we introduce the interrelated techniques of filling goaf directly using underground driving gangue in the east of No. 2202 conventional mining face. We also analyze the change law of convergence between roof and floor, pillar load and shrinkage of movable column in the mining face filled with gangue. The results show that, by using the filling equipment of belt conveyor for throwing gangue, "filling three for every six roof-control rows reach" and the filling cycle parameters of 4.5 m×3.0 m in the east of No.2202conventional mining face, the product of this face can reach 14, 700 t per month. The goaf is filled compactly and the strata behavior of mining stope is quite desirable. The average value of accumulated convergence between roof and floor is less than 25 mm. Surface subsidence above the projection of mining face is 203~276 mm, and the buildings on the surface which required priority protection are effectively protected. The maximum compressed volume and ratio of gangue filled are 251 mm and 12.1%, respectively.


Yang X.-P.,China University of Petroleum - East China | Lu S.-J.,China University of Petroleum - East China | Lu S.-J.,Shengli Engineering and Consulting Company Ltd | Gao Z.-F.,Xinwen Mining Group Company Ltd | And 2 more authors.
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | Year: 2010

The amine solution is characterized by quick absorption, large absorption capacity and simple regeneration. The potentiometry method and pH method were used to study carbon dioxide absorption characteristics in MEA, DEA and TEA solution. The relations among electric potential, pH, absorption rate, absorption capacity were studied. The new measurement methods about amine solution concentration and carbon dioxide concentration were presented. The results show that MEA and DEA are good amine solutions.Also after drawing the relation curve between absorption rate and potentiometry or absorption rate and pH, the potentiometry method (or pH method) can be used to analyze the absorption extent of CO2 in amine solutions.


Yue Z.-W.,China University of Mining and Technology | Yang R.-S.,China University of Mining and Technology | Sun Z.-H.,China University of Mining and Technology | Sun Z.-H.,Xinwen Mining Group Co. | And 2 more authors.
Meitan Xuebao/Journal of the China Coal Society | Year: 2010

In order to simulate fracture behavior of rock under different angles between pre-crack and loading direction, the fracture experiments of the three-point bend beam containing unilateral incision subjected to impact load were carried out by transmission-type caustics test system. Experimental results show that inclined edge crack specimen is subjected to normal stress and shear stress. The growth cracks are mixed code cracks and the focal speckles at the tips of crack are also mixed. The dynamic stress intensity factor, crack propagation time and the crack propagation velocity are associated with the angle changes between pre-crack and the loading direction. As the angles between pre-crack and the loading direction increase, the maximum of crack propagation speed increases, and the oscillation of the crack propagation velocity also increases. When the loading direction is the same as the pre-crack direction, the crack initiates the fastest, and the crack is the I-type crack. As the angles between loading direction and pre-crack direction increase, the crack takes on mixed characteristic, the dynamic stress intensity factor K II d represents more obviously and its value increases.


Chen J.,China University of Mining and Technology | Chen J.,Xinwen Mining Group Corporation | Du J.-P.,China University of Mining and Technology | Zhang W.-S.,Xinwen Mining Group Corporation | Zhang J.-X.,China University of Mining and Technology
Zhongguo Kuangye Daxue Xuebao/Journal of China University of Mining and Technology | Year: 2012

A mechanical elastic model of the base beam in a long wall face was constructed using the elastic base beam method. The sinking of the roof rock in the goaf before it touches the waste was modeled by obtaining the basic differential equations for the sinking of the rock. The relationship between the sinking beam and surface subsidence was analyzed by predicting the behavior of the strata. The results showed that sinking of the roof beam is approximately at the maximum after about 10 to 20 meters of working face has been developed. The waste base coefficient was found to be the most important factor affecting roof sinking in the goaf. The pressure on the filling waste changes with the waste base coefficient and the most effective way to reduce surface subsidence is by increasing k g and decreasing W 1. It is shown that the control of immediate roof subsidence in the coal seam is the key to controlling surface subsidence. Field experiments showed that W 1 could be decreased to about 12 to 64 mm and that the average, maximum surface sink is then 253 mm. This is quite close to the predicted 261 mm sink from the model given a 2.1 meter thick coal seam buried 437 meters deep.

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