KAN Jia-guang, ZHANG Nong, LI Bao-yu, et al. Analysis of supporting resistance of backfilling wall for gob-side entry retaining under typical roof conditions[J]. 2011, 32(9).
KAN Jia-guang, ZHANG Nong, LI Bao-yu, et al. Analysis of supporting resistance of backfilling wall for gob-side entry retaining under typical roof conditions[J]. 2011, 32(9).DOI:
The common field gob-side entry retaining roofs are divided into three types
i.e. thick immediate roof
thin immediate roof and without immediate roof. Through utilizing the continuous laminate model and considering the factors of the support effect of the coal side in the roadway
the incentives of roof caving
etc.
the calculation formulas of roadside support resistance under three kinds of roof conditions are obtained. According to the formulas
the increase bearing ability of coal side and the roof of filling areas benefit to decrease the support resistance of filling body beside roadways. With the decrease of the thickness of immediate roof
the support resistance of filling body increase.The roof collapse’s incentives would vary from different layers of immediate roof. Gravity causes the thick immediate roof’s collapses; and on the other hand
the movement of upper rock layers causes the thin immediate roof’s collapses.