Analysis and Control Measures of Mining Pressure Manifestation of Soft Coal Seam in a Fully Mechanized Mining Face
The roadway with soft roof is prone to serious problems such as rock fragmentation and sub-sidence,coal wall sheeting and support pressing.In order to solve the problems of soft roadway surrounding rock breakage and unreasonable support scheme,the stress manifestation in 4156 fully mechanized mining face of a coal mine is studied.The load and surrounding rock shape variables observed in real time during the mining process are analyzed by the method of field measurement.The results show that the load of the up-per bracket is obviously smaller than that of the lower bracket under the influence of the inclination angle.The roadway affected by the advance mining stress has a serious contraction.The influence range of the ad-vance mining stress is obtained according to the deformation trend of surrounding rock.The research results can provide reference for the selection of roadway support and support under similar geological conditions,and can also ensure the safe and efficient mining of this working face.
soft coal seammine pressure observationmining stressleading support pressurerein-forced support
万方数据
维普
