Research On Surface Movement Law Of 15201 Fully Mechanized Working Face Of Zhang Jia-mao Coal Mine

With the speeding up of industrialization, the demand for energy in our country is becoming more and more big, the coal resource is the main source of energy today. Coal and other minerals, once produced, can cause the surface deformation and cracking and built, damage, or even cause soil erosion, cause the geological disasters such as landslide and debris flow, greatly affect people’s normal production and life, and life and property security, therefore, carry out underground mining surface movement law research is of great significance. In view of this, in this paper, the integrated use of theoretical analysis, field monitoring and numerical simulation and other research methods, with the changs Mao based on the engineering support of 15201 fully mechanized working face of coal mine integrated use of theoretical analysis, numerical simulation and spot observation and other methods, the establishment of surface movement observation station with nearly 15 months during the period of working face mining mobile observation and surface damage based on the analysis of the survey results, it is concluded that surface movement Angle value parameters and probability integral are expected, and the numerical simulation method is adopted to study the surface movement rule, obtained has certain value of research results, the main results were as follows:(1)According to the mining environment of 15201 fully mechanized working face of Zhang Jiamao coal mine, the surface movement observation is designed. On the basis of field monitoring data analysis, the comprehensive coal mining boundary Angle of Zhang Jiamao 5-2 coal mine is given, Angle of bedrock and soil Angle, fully mining step Angle and surface movement start from the mining surface strata movement related parameters, such as, and learned that every station of surface movement observation area has experienced starting stage, active phase, decline phase, but the duration of each measuring point three stages is different.(2)Through the surface movement observation data and surface subsidence damage characteristics, analyzed the changs Mao mining area characteristic of thick soil lager, thin bedrock, shallow buried depth under the condition of mining subsidence laws: the observation area surface formed parallel to the gateway of mined-out area near the border of the lateral and cut by permanent cracks, formed with the working face advancing ahead of working face closing cracks; Intense and surface movement movement period is shorter; Larger surface movement damage, especially in the ravines or ravines range is more serious on the edge of the surface deformation and destruction; The loess surface cracks, to a certain extent, inhibit the scope of the surface deformation, increases the surface movement Angle; Surface coverage under the condition of thick soil lager is in the mountains and will appear in the surface subsidence terraced fracture damage, leading to the boundary of the north Angle decreases, and the mobile Angle increases, and the general law of mining under the condition of surface movement are different.(3)By using probability integral method in half infinite when mining surface subsidence basin is moving the deformation on the main section, suitable for expected parameters of probability integral method is presented. At the same time, through the theoretical formula is expected on the measured surface subsidence curve fitting, the fitting results show that: according to the measured data to determine the parameters of probability integral method satisfies the requirement of mine geological and mining conditions, the expected results are in good agreement with the test result; Using the large finite element software ANSYS to ground surface subsidence caused by mining is simulated and further analysis of the characteristics, the surface movement rule and law of simulated results and measured results are consistent.