Research On Surrounding Rock Control Techniques Of Mining Roadway In The 2207 Fully Mechanized Working Face Of Changcun Mine

With the increase of mining depth and mining geological conditions become more complex,resulting in mine pressure appear more obvious,the roadway support difficulty,not only increase the roadway related accidents,threatening the safety of underground operation,but also a serious impact on the economic benefits of mining,and mining face after if the overburden failure law of motion is unclear that understanding is not enough,the lack of reasonable control,prone to sudden water outburst and collapse accidents in mines,so the specific geological conditions of coal mine working face after the movement of overlying strata failure law and Study on the stability of roadway surrounding rock has important significance.Based on the surface and the roadway of Changcun Coal Mine of Lu'an Group 2207 actual work arrangement and geological conditions of coal mine as the research background,according to provide drilling histogram of working face,work procedures and data,using borehole camera,bolt(cable)and other equipment on the 2207 rail along the dynamometer is measured,and the coal rock the characteristics of emission tests and acoustic properties,and deformation simulation software were simulated by movement regularity of rock and overlying roadway of working face by using FLAC3 D numerical,combined with field measurement and physical experiment validated by the roadway surrounding rock control is proposed,the main contents of the study are:(1)In order to understand the destruction condition of 2207 rail along roof,the ZXZ20 A mine drilling peeping instrument was used to observe the borehole along the 2207 working face of Chang cun coal mine.The study on the measurement of underground pressure in 2207 rail roadways includes the observation of the two sides of roadway and the observation of the force of anchor and anchor rope.(2)Taking the core of fresh coal sample from the working face of 2207,the study on the mechanical properties of coal rock mass and the acoustic emission characteristics were carried out to provide the basis for the study of the stability control of surrounding rock in the mining roadway.(3)Combined with the geological conditions of a coal mine of Lu'an Group often village actual formation and 2207 working face of the actual layout,application of FLAC3 D software for modeling,the working face advancing with the overlying strata movement characteristics and stress and deformation characteristics of roadway were simulated and deformation analysis.(4)According to the law of the surface rock pressure and the failure characteristics of the roadway surrounding rock,the reasonable suggestion for the roadway support is put forward.