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为深入研究煤层倾角对周期来压特征的影响,以越南河林煤矿为研究对象,通过理论分析和现场实测就煤层倾角对综放开采工作面顶板周期来压特征的影响规律进行研究.理论分析和现场实测的研究.结果表明:当煤层倾角为-15°~15°时,随着煤层倾角的增大周期来压步距逐渐减小,周期来压峰值逐渐增大.进一步分析得出不同煤层倾角对周期来压特征的影响系数.由于仰斜开采时层向分力指向采空区方向,在弯矩和层向分力的作用下使得周期来压步距偏小,来压峰值偏大;由于俯斜开采时层向分力向着工作面推进方向,使得周期来压步距偏大,来压峰值偏小.
In order to further study the influence of coal seam dip on periodic pressure characteristics, the paper takes Hohling coal mine of Vietnam as the research object, and studies the law of influence of coal seam dip on the periodic pressure characteristics of roof in fully mechanized caving mining face through theoretical analysis and field measurement. The results show that when the coal seam inclination is between -15 ° and 15 °, the pressure steps decrease with the increase of the dip angle of the coal seam and the peak pressure increases with the increase of the dip angle of the coal seam. Coal seam dip angle on the characteristics of the periodic pressure factor.Because of inclined mining when the direction of layer-oriented component points to the direction of the gob, bending moment and layer under the action of the force to make the cycle pressure step is small, to pressure peak value Large; due to the mining subsidence layer toward the face to promote the direction toward the face, making the cycle pressure step is too large, to pressure peak value is small.