Research On Stability Control Of The All Mine Surrounding Deep Roadway Deformation Characteristic

6#coal of coal mine working face in Datong kiln transportation laneas the engineering background, combined with high stress coal roadwaysurrounding rock deformation and failure characteristics, all of wholesection cable anchor supporting in coal roadway, enveloping circle theory,high stress coal roadway surrounding rock supporting parameters andmodes, comprehensive study of the high stress all the influence factors ofcoal roadway surrounding rock stability control technology. Using in situdetermination of mechanical properties test of coal, high stress coalroadway surrounding rock supporting analog simulation, numericalsimulation and the engineering application methods, such as full of highstress coal roadway surrounding rock stability control combinationsupporting scheme of supporting parameters and its are studied, and fullof high stress in the construction of coal roadway surrounding rock stability monitoring, studies the following conclusions:1. Buried deep high stress coal roadway surrounding rock, all in highstress and soft rock rheological effect of coal is under the influence of theintensity of coal roadway surrounding rock mechanics properties in situon the low side, the steady ability is poorer, roadway surrounding rockunder the action of high ground stress, easy to collapse, take a fall, highstress coal roadway surrounding rock stability maintenance all extremelydifficult.6#coal mining working face in Datong kiln mine the coalroadway surrounding rock of coal samples under uniaxial compressiontest, on the mechanical properties of surrounding rock of roadway ismainly characterized by rheological, plastic properties, this is the cause ofroadway drivage early large deformation of surrounding rock and the rootcause of the deformation rate is fast.2. In view of the high stress coal roadway surrounding rock features,in combination with characteristics of coal roadway deformation andfailure, the circle of whole section bolt rope envelope supportingtechnology, the integrity of roadway surrounding rock is improved, thebearing capacity of the roadway surrounding rock supporting structurewas improved; Analysis shows that coal roadway surrounding rocksupporting parameters and mechanical properties, in situ combinedsupport in the form of a rational selection directly decided the high stresscoal roadway surrounding rock stability control. 3. In view of the high stress coal roadway surrounding rock stabilitycontrol, the whole section (line) anchor supporting way, full of coal underthe action of high stress occurs only small deformation of roadwaysurrounding rock damage, with the increase of load, the coal roadway canmaintain a good stable state, eventually the whole coal roadwaysurrounding rock stress and deformation are mostly more completecontrol of whole section bolt (cable) combined supporting method toimprove the coal roadway deformation damage effect is significant.4. Simulation studies show that will improve compared with theoriginal plan common cable anchor supporting, whole section (line)anchor supporting way makes all high stress coal roadway surroundingrock deformation can control co., LTD., including the roof and floor, twoopposite nearer the amount closer, etc. Analog simulation analysis showsthat with the improved scheme is compared with the original supportscheme, the high stress coal roadway all help mutually to nearer theamount reduced42.6%, roof and floor is relatively reduced63.4%shrinkage, reduction of area of roadway reduced42.5%, so for high stresscoal roadway, adopt the method of whole section and anchor ropecombined support, greatly reducing the movement and deformation ofroadway, destruction, high stress the integrity and stability of coalroadway surrounding rock are improved greatly. Numerical simulationresults show that using whole section anchor rope envelope lap joint support mode for the whole section rock coal supporting effect is good,greatly improving the high stress coal roadway surrounding rock’sstability.5. At the same time of engineering application, the Datong kiln6#coal of coal mine high stress coal roadway surrounding rock stress anddeformation monitoring. The results showed that the roof and floormaximum nearer to50.6mm, maximum load of122.5KN by prestressanchor cable, and cross section of roadway roof support load andcontracts are reached steady state after15days. Show that high stresscoal roadway surrounding rock all using whole section combinationsupporting coal roadway anchor rope envelope circle has obtained thegood application effect.