关键词: 深部倾斜煤层, 沿空掘巷, 关键块体稳定, 非对称耦合控制技术

Abstract: Based on theoretical analysis, mechanical model of overlying structure in gob-side entry driving roadways of deep inclined coal seam has been established; the relationship between stability of overlying strata key block and burial depth, dip angle of coal seam during recovery period has been analyzed, which has indicated that main motion form of the key block during recovery is rotational instability, and precondition of maintaining roadway stability is to control rotational instability of the key block; the effect analysis of roadway-inner supporting resistance on rotational instability coefficient of key block has indicated that the sensitivity of rotational instability coefficient of key block to carrying capacity of narrow coal pillar and roof is much more intense than that to solid coal pillar, so improving capacity of narrow coal pillar and roof can control rotational sinking of key block effectively. Based on high strength bolting system, gob-side entry driving asymmetric coupling control technology in deep inclined coal seam has been put forward with core technology of high-resistance yielding support of roof and inclined traversing seam anchor cable enhancing narrow coal pillar. Bolting parameter of testing roadway has been confirmed by system information designing method. And finally, it will be applied to engineering practice successfully.

Key words: deep inclined coal seam, gob-side entry driving, stability of key block, asymmetric coupling control technology