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The caving of thick and strong roof stratum causes tremendous rock pressure in mine.The results of the analysis on dynamic natures of actual measurements of some fields,of which the roof pressure can be caused by thick and strong stratum in long wall thick coal caving face,could present the relation between the collapse and movement of thick and strong roof strata and surrounding rock pressure.In order to control the roof pressure effectively,the thick and strong roof strata,can be fractured and softened previ- ously by hydraulic fracturing and low-high pressure water infusion,fracturing and softening method.The results of study can provide basis for strata control and safe management in long wall thick coal caving face.
The caving of thick and strong roof stratum causes tremendous rock pressure in mine. The results of the analysis on dynamic natures of actual measurements of some fields, of which the roof pressure can be caused by thick and strong stratum in long wall thick coal caving face , could present the relation between the collapse and movement of thick and strong roof strata and surrounding rock pressure.In order to control the roof pressure effectively, the thick and strong roof strata, can be fractured and softened previ- ously by hydraulic fracturing and low -high pressure water infusion, fracturing and softening method. The results of study can provide basis for strata control and safe management in long wall thick coal caving face.