Advanced Materials Research Vols. 616-618

Abstract: Coal mine is important and basic industries in the country, and it is very important to establish a sound, reliable coal mine safety monitoring system for the safety production of coal mine. The demand analysis was made for the development of coal mine safety monitoring system. It contains to build up the layout model of the standard coal mine underground production environment and set all kinds of underground transducers especially methane transducer. On this basis, the general design scheme of coal mine safety monitoring system was determined. Demand analysis and scheme design provided for coal mine safety monitoring system can meet the needs of practical application and establish the foundation for the subsequent system development.

Abstract: The similar material composed of quartz sand, gypsum, colophony and alcohol solution, model test and similarity theory were depended on in the test, and standard cylinder specimens were made in different proportions. The physical and mechanical properties of blocks were studied through uniaxial compressive experiments. The researches show that the ratio of elastic modulus and down modulus of the specimens increase linearly with the increase of the ratio of sand and cement; while the elastic modulus, the down modulus and the uniaxial compressive strength decrease in shah model of index function with the increase of it. All parameters mentioned above reduce rapidly with the increase of the ratio of sand and cement when the ratio of sand and cement less than 4, if not, the parameters increase slowly.

Abstract: Using FLCA3Dnumerical simulation software, analyzed the different models of different extraction from the composite key layer of breaking the law, respectively to the Composite Key Stratum and non-Composite Key Stratum .The results show that Composite Key Stratum breaking interval was significantly greater than The non-Composite Key Stratum, showing a more obvious composite effect, provides a more adequate proof to the Composite Key Stratum theory.

Abstract: A comprehensive colliery production monitoring system is discussed, which can dynamically weigh the tramcar and carry out video monitoring at the same time. This colliery production monitoring system consists of the front-end hardware platform and the back-end information management system. Both the front-end hardware platform and the back-end information management system are designed in detail here. The main functions of the information management system are put forward. This monitoring system can not only strengthen the supervision of production and effectively reduce accidents, but also prevent the tax evasion. This design has been used in China for 2 years with stable operation.

Abstract: The permeability of coal is very important parameter on gas extraction, but it is difficult to get good effect by conventional method on low air permeability coal seam. Based on above reason, we put forward the research on technology for increasing the permeability of coal seam by impacting with high energy air, as for showing the effect we make experiment in Xin’an mine. The data display it increased to 155.96% of single hole maximum discharge, the average is 112.73%. The best result in study is the position of 2.5m far from experimental borehole, and the flow increased to 179.69%. All the data display that it can reach well result of increasing the permeability of coal seam by impacting with high energy air.

Abstract: According to the 8000t/d production capacity planning and high in-situ stress, high rockburst proneness in deep mining of Sanshandao Gold Mine, three mining methods were compared and analyzed from safety, technical and economic indexes. Fuzzy optimization model was built to select the optimal mining method based on mining indexes quantification and fuzzy analysis of mining indexes. The conclusion shows that Alternate Room-Pillar Mining Method with Ascending Backfill is the optimal mining method to satisfy the safety and high efficiency demand of deep mining in Sanshandao Gold Mine.

Abstract: It can be concluded that two abreast near ways were suffered disturbed effects by one another in the cause of one’s excavation by studying the disturbed effects between JI17-22300 air way and machine way of JI16-22320 working face in the course of excavation ofJI17-22300 air way in Pingmei Shares Shikuang. We found three kinds of phenomenons. Firstly, the biggest deformation was the floor. Secondly, the stress concentration zone was10m-20m in front of the head of the roadway and floor drum violent activities for a period of 6-7 days. Lastly, stress appeared on two walls earlier of that of roof and floor stress appearance, namely wall deformation happened in distance of head-on20m, wall deformation amount begins to tend stable convergence after50~60 meters of roadway, those were happened in the roadways which were 450m depth, 11m span and at the drivage speed of 10m/d.

Abstract: Mining area still has safety problems after research the present situation of mining.This article discussed the importance of systematize of safety management researching. By setting up the model of tree, mine safety management researching analyses various elements about relationship and effect under affecting each other. This work is benefit for systematize safety management in mining.

Abstract: Thelarge-scale exploitation of coal resources, will cause large area ground subsidence, soil quality to destroy and civil building foundation engineering problems, give the people live and work in peace brings a harm. This article from the network parallel electrical fundamentals and application premise to proceed, with Xie pool mining subsidence area new Xie dam engineering geological background, site layout of the two line, a 128 electrode, analysis of the detection results, on the ground by means of artificial method, electric field distribution, can quickly determine the quality of dam foundation damage points, provide geological basis for its management.

Abstract: With the rapid increase of coal resource development, the process of exploitation of the mine to a deep continuous extension m deep mine water hazard, geological structure and gas, geological problems of mine safety and efficient production will be more prominent, and rely on the existing geological exploration resultsdifficult to achieve the safety of geological and traditional geological methods to protect this purpose. Therefore, the use of advanced detection technology and equipment to the mine water and its complex geological structure of advanced detection forecasting, and dynamic monitoring, vital to the development of high-yield and efficient mine. Mine transient electromagnetic method for its detection of directional volume effect is small, fast and accurate can be advantages to solve the underground tunnel at different spatial distribution of body water damage, especially for tracking detection of the roadway for the efficient and safe roadway excavation to provide strong geological assurance.